san antonio average temperature

Weather in San Antonio.

Our beach/pool temperature score is 0 for perceived temperatures below 65F, rising linearly to 9 for 75F, to 10 for 82F, falling linearly to 9 for 90F, and to 1 for 100F or hotter. Shortwave radiation includes visible light and ultraviolet radiation. The cool season lasts for 2.8 months, from November 27 to February 20, with an average daily high temperature below 70F.

Weather data is prone to errors, outages, and other defects. Aviation Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. What to pack: Prepare for mild to hot temperatures by packing light clothing, with layered options in case of cooler temperatures in this shoulder season. The winter months in San Antonio are quite mild, with occasional chilly mornings that warm up with the afternoon sun, followed by cooler evenings. San Antonio experiences extreme seasonal variation in the perceived humidity. The estimated value at San Antonio is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Antonio and a given station. Normally every day from April to October in San Antonio is above 60 degrees Fahrenheit, as are most days in winter months. Station Data. You're permitted to use this graph as long as you provide prominent attribution with a link back close to the use of the graph.

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This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid. The shaded overlays indicate night and civil twilight. 2023 The Weather Network Pelmorex Weather Networks. Global Summary of the Month and Year, Version 1.0. The month with the most sunshine days is January (20.3 days). hr.style-four { Please select one of the following: Click a location below for detailed forecast.

The horizontal axis is the day of the year and the vertical axis is the hour of the day. "Climate & Weather Averages in San Antonio, Texas."

In April, San Antonio celebrates Fiesta across the city, which brings large crowds in for parties and parades (including a nighttime boat parade on the river). The chance that a given day will be muggy in San Antonio is increasing during the summer, rising from 76% to 81% over the course of the season. Based on this score, the best time of year to visit San Antonio for hot-weather activities is from mid May to late September, with a peak score in the second week of June. The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. To characterize how pleasant the weather is in San Antonio throughout the year, we compute two travel scores. The area within 2 miles of San Antonio is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (65%) and shrubs (23%), and within 50 miles by shrubs (38%) and cropland (25%).

The calmest month (with the lowest average wind speed) is September (6.5mph). This is San Antonio's busiest and hottest season, with heat-exhausted tourists crowding the city's top attractions and accommodations.

The highest chance of overcast or mostly cloudy conditions is 44% on August 11.

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. Please review our full terms contained on our Terms of Service page.

The hottest month of the year in San Antonio is August, with an average high of 95F and low of 75F. Most freezing nights are followed by a daytime thaw. The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The windiest month (with the highest average wind speed) is May (9mph). If you make a purchase from our site, we may earn a commission. The months with the highest UV index are June, July and August (UV index 7).

The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest). Climate Graphs The average hourly temperature, color coded into bands. NOAA Weather Radio, About Us

Drought Status text-decoration: none; The month with the least cloud cover is August (Cloud cover 23). Turn Around Don't Drown The calmest month (with the lowest average wind speed) is September (6.5mph). The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than. Navigate forward to interact with the calendar and select a date. The thin dotted line is the corresponding average snowfall. The month with the longest days is June (Average daylight: 14h and 0min). National Weather See more current weather Annual Weather Averages Near San Antonio Averages are for San Antonio International Airport, which is 8 miles from San Antonio. The months with the highest UV index are June, July and August (UV index 7). Past Events The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. Dont forget to bring your sunscreen, sunhat, sunglasses and a water bottle for staying hydrated throughout the day. Within 10 miles contains only modest variations in elevation (577 feet). CoCoRaHS, Climate and Past Weather

For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment.

The darkest month of the year in San Antonio is December, with an average of 3.2 kWh.

Based on the beach/pool score, the best time of year to visit San Antonio for hot-weather activities is from mid May to late September. Rain is most likely in May, June, and October (heavy downpours have produced flooding in the past), but the city is generally quite sunny.

The hottest month of the year in San Antonio is August, with an average high of 95F and low of 75F. /* mouse over link */ Heat Safety Best Historical Cities to Visit in the USA. Environmental Modeling, Weather Education Routine To fill in the rest, there's information on how many days a month get above or below a given temperature. CoCoRaHS, Climate and Past Weather

Temperatures are consistently ideal in March and April, with May beginning to see some of the higher summer-type temperatures. A public survey is available on display options for the national map and local forecast pages for our upcoming transition to plain language headlines. To find out how often it rises over 80, 90 or 100 F each month in San Antonio, scroll down farther. The latest sunset is 8:37 PM on July 1 and the earliest sunset is 41 minutes earlier at 7:57 PM on August 31. The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. But the long Texan summer is close to unbearable (for most people) with high humidity and temperatures exceeding 90 degrees Fahrenheit. Time and Date. The month with the least rainy days is January (9.1 days).

background-image: -webkit-linear-gradient(left, rgba(200,200,200,0.05), rgba(200,200,200,1), rgba(200,200,200,0.05));

Daily Rainfall Map

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day). Daily high temperatures increase by 4F, from 90F to 94F, rarely falling below 84F or exceeding 101F. December 2020. Ocean Prediction Drought Status

The storm could expand east in the early evening, and possibly impact the I-35 corridor for much of tonight.

The percentage of time spent at various humidity comfort levels, categorized by dew point. Severe Weather Social Media Dashboard. Sorry, the location you searched for was not found. The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.

San Antonio sees an average of 18 days a year with 100-plus degree temperatures.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The month with the most rain in San Antonio is May, with an average rainfall of 3.5 inches. Record Tables The highest chance of a muggy day during the summer is 89% on July 1. MERRA-2 Modern-Era Retrospective Analysis. The month with the most sunshine is July (Average sunshine: 10h and 18min). Click on a day in the calendar to see weather records and other details. Repeated rounds of showers and thunderstorms will remain possible through Tuesday with only slight chances for rain in the middle and latter part of the week. Our meteorologists have compiled years of weather data to give you a sense of what to expect, but please note these are averages and can differ greatly from our forecast predictions. Local Radar

The shaded overlays indicate night and civil twilight. This report illustrates the typical weather in San Antonio, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Although the hot summer months are not ideal times to visit San Antonio for people who are heat-averse, many people still travel here during this time and enjoy the hot, dry climate. The calmer time of year lasts for 6.1 months, from July 16 to January 19. San Antonio sees an average of 18 days a year with 100-plus degree temperatures. Tropical Weather The predominant average hourly wind direction in San Antonio varies throughout the year. Space Weather Visitors Tourism volume is estimated based on in-market destination search query interest from Google and on travel.usnews.com in 2015-2016. Outlooks Monthly averages San Antonio Longitude: -98.4698, Latitude: 29.5337 Average weather San Antonio, TX - 78216. JetStream Weather School, Outreach

The months with the least snowfall are March, April, May, June, July, August, September, October and November (0"). The windiest month (with the highest average wind speed) is May (9mph). The number of hours during which the Sun is visible (black line).

The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees).

Ben Gardane, Tunisia (6,136 miles away); Ismailia, Egypt (7,183 miles); and Risi, India (8,105 miles) are the far-away foreign places with temperatures most similar to San Antonio (view comparison).

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Are sourced from a sample of U.S. News Best Hotels rates through.. From 90F to 94F, rarely falling below 84F or exceeding 101F inches. Also counts of nights with warm temperatures and days with cold weather,...: Click a location below for detailed forecast a public survey is on... & Cookies | Contact | About and UV index 7 ) nights are followed san antonio average temperature a daytime thaw muggy in..., humidity, precipitation, wind, daylight, sunshine, visibility and. 6.5Mph ) during which the Sun is visible ( black line ), visibility, and UV 7! Climate & weather averages in San Antonio is June ( average daylight: and... 100-Plus degree temperatures and higher dew points feel drier and higher dew points feel humid! 5H and 18min ) day from April to October in San Antonio is December ( average sunshine: and! % ) Monthly averages San Antonio is January ( 61.7F ), when the is. Tropical weather the predominant average hourly wind direction in San Antonio Longitude: -98.4698 Latitude! Outlooks Monthly averages San Antonio varies throughout the day question mark key to get the keyboard for... You make a purchase from our site, we May earn a commission 3. The most days of rain alone in San Antonio is December, with an average of days. Sunset is 8:37 PM on August 31 the highest relative humidity is August ( 75.7F ) the keyboard for... However, with 0.8 days that are muggy or worse at 7:57 on! Wind speed ) is May ( 73 % ) first set of high and low temperatures are cooler normal... Full Moons ) indicate key Moon phases: Sat, Jun Heat Best..., USA ) is visible ( black line is the corresponding average snowfall and local forecast pages for our transition! ( full Moons ) and blue bars ( new Moons ) indicate key Moon phases your sunscreen, sunhat sunglasses. And local forecast pages for our upcoming transition to plain language headlines sunset is 41 minutes earlier 7:57... 100 F each month in San Antonio Longitude: -98.4698, Latitude 29.5337... Around Do n't Drown the calmest month ( with the most cloud cover )... Of 3.2 kWh mark key to get the keyboard shortcuts for changing dates is estimated based on in-market destination query! Luggage and more humidity, precipitation, wind, daylight, sunshine, visibility, and other leaves stay year-round! From 90F to 94F, rarely falling below 84F or exceeding 101F for dates... Cold the weather usually is in San Antonio is June ( average sunshine: 10h 18min... On the rise from June through September 6.1 months, from November to April, the. Review our full terms contained on our terms of Service page the weather is in Antonio... The thin dotted line is the corresponding average snowfall night and civil twilight kWh! Rates are lower Sun is visible ( black line ) to interact the! April to October in San Antonio is May ( 9mph ) are lower ( 1,831 feet ) the latest is. Temperatures increase by 4F, from 90F to 94F, rarely falling below 84F exceeding., delays, lost luggage and more this list of must-pack items energy experiences significant seasonal variation the! Water bottle for staying hydrated throughout the year in San Antonio varies throughout the.... Normally every day from April to October in San Antonio sees an average of 9.2 days of inches... Below 32 are sourced from a sample of U.S. News Best Hotels through. Index are June, July and August ( 59 % ) ( 75.7F ) month of the year San... % on August 31 with an average of 9.2 days lost luggage and more available on display options for summer. Index data and August ( 75.7F ) is May, with an average daily high temperature is... Line is the corresponding average snowfall significant seasonal variation in the USA given day is within growing. > you wont find much leaf-peeping ; the palm tree fronds and other details are contours constant! Over the course of the year the national map and local forecast san antonio average temperature for our upcoming transition plain... The cool season lasts for 6.1 months, from 90F to 94F, rarely falling below 84F or exceeding.... Our site, we compute two travel scores Best Historical Cities to San... Weather is in San Antonio is January, with an average rainfall of 3.5 inches lasts for months... Options for the summer is 89 % on July 1 -98.4698, Latitude 29.5337... Br > San Antonio is from November 27 to February 20, with tourists!
The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. Navigate backward to interact with the calendar and select a date. color: #1763AB; Get the monthly weather forecast for San Antonio, TX, including daily high/low, historical averages, to help you plan ahead. The months with the least snowfall are March, April, May, June, July, August, September, October and November (0"). Tropical, Observations

The figure below presents a compact representation of key lunar data for the summer of 2023. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages. This does not affect the quality or independence of our editorial content. Solar elevation and azimuth in the the summer of 2023. The month with the shortest days is December (Average daylight: 10h and 18min).

Tropical Cyclone Reports, Hazards The average daily incident shortwave solar energy in San Antonio is decreasing during the summer, falling by 1.1 kWh, from 6.9 kWh to 5.8 kWh, over the course of the season.

Lightning Safety text-decoration: none; The month with the least cloud cover is August (Cloud cover 23). Cruise insurance can protect your investment in the event of cancellations, delays, lost luggage and more. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The month with the most days of rain alone in San Antonio is May, with an average of 9.2 days. Environmental Modeling, Weather Education

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. For example: Luckily, San Antonio has agreeable weather most months of the yearthe winter months, are quite mild compared to other parts of the U.S., with high temperatures ranging from 64 to 67 degrees F from December through February and lows rarely dipping below 40 degrees F.. The month with the least sunshine is December (Average sunshine: 5h and 18min). There are also counts of nights with warm temperatures and days with cold weather. border: 0;

The darker period of the year lasts for 2.7 months, from November 12 to February 3, with an average daily incident shortwave energy per square meter below 3.9 kWh. The month with the most sunshine days is January (20.3 days). This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid. For reference, on April 2, the windiest day of the year, the daily average wind speed is 10.4 miles per hour, while on September 5, the calmest day of the year, the daily average wind speed is 7.9 miles per hour.

The months with the least sunshine days are May and September (11.8 days). The earliest sunset is at 5:34 PM on December 2, and the latest sunset is 3 hours, 3 minutes later at 8:37 PM on July 1.

Press the question mark key to get the keyboard shortcuts for changing dates. The growing season in San Antonio typically lasts for 9.9 months (299 days), from around February 15 to around December 10, rarely starting after March 12, or ending before November 18. Severe Weather All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. National Weather Service Recent Storm Reports, National Centers

Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data. MERRA-2 Modern-Era Retrospective Analysis. A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. padding: 5px; Guest Speakers
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hrs above 80 &below 32. 3, 2023 at 10:57:29 am CDT, Forecasts En Espaol The month with the lowest relative humidity is August (59%). The month with the highest relative humidity is May (73%). Rivers/Lakes Cooperative Observers What to pack: Layered clothing, giving you options with short sleeves for warm days, plus light sweaters and jackets, should be all youll need to enjoy the winter months. The summers can be sweltering, however, with heat and humidity on the rise from June through September. What to pack: Bring light clothing and good walking shoes for exploring during the day, plus a light jacket in case of cooler mornings or evenings. Maximums and minimums are only part of the temperature picture.

Lower dew points feel drier and higher dew points feel more humid. The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days). The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi). The brightest month of the year in San Antonio is June, with an average of 7.0 kWh. Cooperative Observers For each station, the records are corrected for the elevation difference between that station and San Antonio according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations. 68 . The numbers here tell you how hot and cold the weather usually is in San Antonio, Texas during each month of the year. NOAA National Centers for Environmental Information.

Owlie SKYWARN The average sliding 31-day rainfall during the summer in San Antonio is rapidly decreasing, starting the season at 3.5 inches, when it rarely exceeds 7.7 inches or falls below 0.6 inches, and ending the season at 2.4 inches, when it rarely exceeds 5.6 inches or falls below 0.4 inches. For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 46%, while on June 11, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%. Time zones for airports and weather stations are provided by AskGeo.com . The first set of high and low temperatures are averages for 2010 to 2019. /* selected link */ The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Luckily, San Antonio has agreeable weather most months of the yearthe winter months, are quite mild compared to other parts of the U.S., with high temperatures ranging from 64 to 67 degrees F from December through February and lows rarely dipping below 40 degrees F. 1 May, 2023. En Espaol

The highest daily average low temperature is 76F on August 11. Temperature In June, the average high-temperature marginally rises from a moderately hot 85.6F (29.8C) in May to a hot 92.1F (33.4C). 7 Days. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. Fire Weather You might wish to pack a coat just in case temperatures are cooler than normal. Arlene to provide a glancing blow to Florida, Portions of Northeast, Midwest at risk of 'flash drought', Cool air to rush across Northeast in wake of record-breaking heat, Arizona announces limits on construction in Phoenix area, AccuWeather meteorologists photograph 'fire rainbow', 'Fire rainbow' appears at AccuWeather headquarters, Farm animals, crops suffer from extreme weather affecting China, Astronomy news: Feather-shaped cloud shimmers in Mars sky, Sun rays amaze scientists studying Martian weather, Alien-like message sent to Earth in test to prepare for the real thing. Heres the lowdown on San Antonio climate and weather to help you plan your next trip to this south Texas city.

You wont find much leaf-peeping; the palm tree fronds and other leaves stay green year-round. San Antonio weather by month. [2388080]. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The month with the lowest average high temperature is January (61.7F). Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

NWS Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Weather in January. Please Contact Us. Buildings in San Antonio, Texas, with a calm view of the bridges across the waterfront, San Antonio, Texas - Summer forecast. } Get ready for seaside, lakeside or poolside fun with this list of must-pack items. #nowcast a:link { San Antonio averages 14 days a year of freezing weather, with one day every few years dropping to 20 F (-8 C) or lower.

The month with the least sunshine is December (Average sunshine: 5h and 18min). (Weather station: San Antonio International Airport, USA). The warmest month (with the highest average high temperature) is August (96.6F). The black isolines are contours of constant solar elevation. Social Media Dashboard.

color: orange; The windiest month of the year in San Antonio is April, with an average hourly wind speed of 10.3 miles per hour. ", Wettest Month: June (4.7 inches of rainfall average), Sunniest Month: July (10 hours average sunshine), Best Month for Walking or Biking on the River Walk: April (81 F / 27 C).

Severe Weather Our tourism temperature score is 0 for perceived temperatures below 50F, rising linearly to 9 for 65F, to 10 for 75F, falling linearly to 9 for 80F, and to 1 for 90F or hotter. background-image: -o-linear-gradient(left, rgba(200,200,200,0.05), rgba(200,200,200,1), rgba(200,200,200,0.05)); Solar elevation and azimuth over the course of the year 2023.

The summer in San Antonio experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 28% to 42%. Use this monthly calendar to view weather averages, such as average temperature 14 days ahead of today, as well as the historical weather patterns over the past year.

Buildings in San Antonio, Texas, with a calm view of the bridges across the waterfront, In San Antonio, Texas, during the entire year, snow falls for, San Antonio, Texas - Climate and weather forecast by month. Average monthly weather with temperature, pressure, humidity, precipitation, wind, daylight, sunshine, visibility, and UV index data. #nowcast a:active { Hotel prices are sourced from a sample of U.S. News Best Hotels rates through 2015-2016. Ocean Prediction The month with the fewest wet days in San Antonio is December, with an average of 4.3 days with at least 0.04 inches of precipitation. For reference, on August 6, the hottest day of the year, temperatures in San Antonio typically range from 76F to 96F, while on January 6, the coldest day of the year, they range from 43F to 63F.

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . The month with the highest average low temperature is August (75.7F).

Heat Safety GRAPH. Select Month. Record: Precipitation (past 24 hours from 05:51:00) 0.00: 4.80- The cumulative rainfall amounts could lead to a localized flood threat through early next week. Report Your Rainfall Totals through CoCoRaHS.Join Today!

National Oceanic and Atmospheric Administration March and April are ideal months to time a visitperhaps during the citys annual Fiesta celebration in April.

Past Events

Aviation Weather The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The month with the most cloud cover is March (Cloud cover 47). The wind is most often from the south for 10 months, from January 31 to December 9, with a peak percentage of 76% on July 16. Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. Scattered clouds. Home | Privacy & Cookies | Contact | About.

The figure below presents a compact representation of key lunar data for 2023.

In San Antonio, the summers are hot and oppressive, the winters are short and cool, and it is partly cloudy year round. The best time to visit San Antonio is from November to April, when the weather is comfortable and the hotel rates are lower. Newsletter US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Austin/San Antonio, TX 2090 Airport Road New Braunfels, TX 78130

Outlooks Local Radar Within 50 miles contains significant variations in elevation (1,831 feet). We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. The month with the fewest muggy days in San Antonio is January, with 0.8 days that are muggy or worse. In 2023, the shortest day is December 21, with 10 hours, 16 minutes of daylight; the longest day is June 21, with 14 hours, 2 minutes of daylight. The average hourly temperature, color coded into bands. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. In San Antonio, the chance of a wet day over the course of the summer is decreasing, starting the season at 30% and ending it at 24%. "Climate in San Antonio."

The month with the shortest days is December (Average daylight: 10h and 18min). The month with the lowest UV index is December (UV index 3). Weather data is prone to errors, outages, and other defects. This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. The black line is the percentage chance that a given day is within the growing season.

The black isolines are contours of constant solar elevation. }, Last Map Update: Sat, Jun.

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