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Climate and Average Weather Year Round in San Antonio Venezuela

In San Antonio, the wet season is overcast, the dry season is windy and mostly cloudy, and it is hot and oppressive year round. Over the course of the year, the temperature typically varies from 72°F to 95°F and is rarely below 69°F or above 99°F.

Based on the beach/pool score, the best times of year to visit San Antonio for hot-weather activities are from early July to early August, from mid August to mid September, and from mid November to late February.

Climate in San Antonio

hothotJanFebMarAprMayJunJulAugSepOctNovDecNowNow37%37%18%18%overcastclearprecipitation: 11.3 inprecipitation: 11.3 in0.1 in0.1 inmuggy: 100%muggy: 100%93%93%beach/pool score: 5.2beach/pool score: 5.24.04.0
San Antonio weather by month. Click on each chart for more information.

Average Temperature in San Antonio

The hot season lasts for 2.2 months, from February 9 to April 16, with an average daily high temperature above 93°F. The hottest day of the year is March 18, with an average high of 95°F and low of 76°F.

The cool season lasts for 3.2 months, from May 29 to September 4, with an average daily high temperature below 88°F. The coldest day of the year is January 6, with an average low of 72°F and high of 91°F.

Average High and Low Temperature in San Antonio

Average High and Low Temperature in San AntoniohotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 691°FJan 691°FMar 1895°FMar 1895°F72°F72°F76°F76°FFeb 993°FFeb 993°FMay 2988°FMay 2988°FSep 488°FSep 488°F74°F74°F76°F76°F75°F75°F75°F75°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in San Antonio

Average Hourly Temperature in San AntonioJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowwarmhothotcomfortablecomfortablecomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Purwodadi, Indonesia (12,375 miles away) is the far-away foreign place with temperatures most similar to San Antonio (view comparison).

Compare San Antonio to another city:

Clouds

In San Antonio, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in San Antonio begins around June 9 and lasts for 3.6 months, ending around September 29. On July 12, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 37% of the time, and overcast or mostly cloudy 63% of the time.

The cloudier part of the year begins around September 29 and lasts for 8.4 months, ending around June 9. On April 27, the cloudiest day of the year, the sky is overcast or mostly cloudy 82% of the time, and clear, mostly clear, or partly cloudy 18% of the time.

Cloud Cover Categories in San Antonio

Cloud Cover Categories in San AntonioclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 1237%Jul 1237%Apr 2718%Apr 2718%Jun 927%Jun 927%Sep 2928%Sep 2928%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in San Antonio varies very significantly throughout the year.

The wetter season lasts 5.9 months, from April 23 to October 20, with a greater than 39% chance of a given day being a wet day. The chance of a wet day peaks at 77% on August 1.

The drier season lasts 6.1 months, from October 20 to April 23. The smallest chance of a wet day is 1% on January 22.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 77% on August 1.

Daily Chance of Precipitation in San Antonio

Daily Chance of Precipitation in San AntoniowetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Aug 177%Aug 177%Jan 221%Jan 221%Jan 13%Jan 13%Apr 2339%Apr 2339%Oct 2039%Oct 2039%NowNowrain
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).

Rainfall

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. San Antonio experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.1 months, from March 11 to December 15, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around July 7, with an average total accumulation of 11.3 inches.

The rainless period of the year lasts for 2.9 months, from December 15 to March 11. The least rain falls around January 26, with an average total accumulation of 0.1 inches.

Average Monthly Rainfall in San Antonio

Average Monthly Rainfall in San AntoniorainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 inJul 711.3 inJul 711.3 inJan 260.1 inJan 260.1 inMar 110.5 inMar 110.5 inDec 150.5 inDec 150.5 inNowNow
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. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

The length of the day in San Antonio does not vary substantially over the course of the year, staying within 35 minutes of 12 hours throughout. In 2021, the shortest day is December 21, with 11 hours, 40 minutes of daylight; the longest day is June 20, with 12 hours, 35 minutes of daylight.

Hours of Daylight and Twilight in San Antonio

Hours of Daylight and Twilight in San AntonioJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2012 hr, 35 minJun 2012 hr, 35 minJun 2012 hr, 7 minSep 2212 hr, 7 minSep 2211 hr, 40 minDec 2111 hr, 40 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 6:14 AM on May 27, and the latest sunrise is 39 minutes later at 6:53 AM on January 29. The earliest sunset is at 6:11 PM on November 14, and the latest sunset is 45 minutes later at 6:55 PM on July 14.

Daylight saving time (DST) is not observed in San Antonio during 2021.

Sunrise & Sunset with Twilight in San Antonio

Sunrise & Sunset with Twilight in San AntonioJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMay 276:14 AMMay 276:14 AM6:55 PMJul 146:55 PMJul 14Nov 146:11 PMNov 146:11 PM6:53 AMJan 296:53 AMJan 29daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Moon

The figure below presents a compact representation of key lunar data for 2021. 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. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases in San Antonio

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. The shaded overlays indicate night and civil twilight.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. 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.

The perceived humidity level in San Antonio, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 4% of 96% throughout.

Humidity Comfort Levels in San Antonio

Humidity Comfort Levels in San AntonioJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 293%Feb 293%100%Sep 18100%Sep 18NowNowmiserablemiserableoppressiveoppressivemuggymuggy
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. 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.

The average hourly wind speed in San Antonio experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 4.2 months, from December 7 to April 13, with average wind speeds of more than 8.5 miles per hour. The windiest day of the year is February 19, with an average hourly wind speed of 12.4 miles per hour.

The calmer time of year lasts for 7.8 months, from April 13 to December 7. The calmest day of the year is September 16, with an average hourly wind speed of 4.6 miles per hour.

Average Wind Speed in San Antonio

Average Wind Speed in San AntoniowindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphFeb 1912.4 mphFeb 1912.4 mphSep 164.6 mphSep 164.6 mphDec 78.5 mphDec 78.5 mphApr 138.5 mphApr 138.5 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in San Antonio is from the east throughout the year.

Wind Direction in San Antonio

Wind Direction in San AntonioJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowsoutheastnorthwest
northeastsouthwest
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 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in San Antonio throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit San Antonio for general outdoor tourist activities are from early to mid July and from late November to early March, with a peak score in the second week of January.

Tourism Score in San Antonio

Tourism Score in San Antoniobest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.14.13.13.1NowNowprecipitationprecipitationcloudscloudstemperaturetemperature tourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit San Antonio for hot-weather activities are from early July to early August, from mid August to mid September, and from mid November to late February, with a peak score in the third week of January.

Beach/Pool Score in San Antonio

Beach/Pool Score in San Antoniobest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.25.24.04.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in San Antonio are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season in San Antonio

Time Spent in Various Temperature Bands and the Growing Season in San AntonioJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 3100%Jul 3NowNowcomfortablewarmhotsweltering
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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. In this report, we use a base of 50°F and a cap of 86°F.

Growing Degree Days in San Antonio

Growing Degree Days in San AntonioJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FJan 390°FJan 390°FJan 29900°FJan 29900°FDec 3111,153°FDec 3111,153°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.

The brighter period of the year lasts for 2.2 months, from January 27 to April 3, with an average daily incident shortwave energy per square meter above 6.2 kWh. The brightest day of the year is February 28, with an average of 6.6 kWh.

The darker period of the year lasts for 6.3 months, from May 12 to November 22, with an average daily incident shortwave energy per square meter below 5.1 kWh. The darkest day of the year is October 14, with an average of 4.8 kWh.

Average Daily Incident Shortwave Solar Energy in San Antonio

Average Daily Incident Shortwave Solar Energy in San AntoniobrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhFeb 286.6 kWhFeb 286.6 kWhOct 144.8 kWhOct 144.8 kWhMay 125.1 kWhMay 125.1 kWhNov 225.1 kWhNov 225.1 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of San Antonio are 7.964 deg latitude, -68.434 deg longitude, and 230 ft elevation.

The topography within 2 miles of San Antonio is essentially flat, with a maximum elevation change of 79 feet and an average elevation above sea level of 220 feet. Within 10 miles is essentially flat (121 feet). Within 50 miles also contains only modest variations in elevation (197 feet).

The area within 2 miles of San Antonio is covered by trees (46%), grassland (28%), and shrubs (17%), within 10 miles by trees (43%) and grassland (32%), and within 50 miles by grassland (49%) and trees (34%).

Data Sources

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.

Temperature and Dew Point

There is only a single weather station, Las Flecheras Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of San Antonio.

At a distance of 110 kilometers from San Antonio, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the 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.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

Other Data

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.

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 . 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.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. 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.

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.