San Antonio Weather Forecast
San Antonio weather: 89°F, clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
San Antonio is a city in Texas. San Antonio is known for The Alamo and River Walk. It has a population of about 1.5 million.
Right now it is 89°F (32°C) in San Antonio with clear. It feels like 94°F. Today runs from 78°F to 101°F. Chance of precipitation is 0%. Sightseeing conditions score 8.4/10 - good conditions.
The best time to visit San Antonio is February, March, August, September, October, November and December. The climate is temperate. April, May and July tend to be the least comfortable months. August is the warmest month with average highs near 99°F, while January is the coldest with lows near 42°F.
The closest major airport is Austin-Bergstrom International Airport (AUS), about 73 mi away. Nearby highlights include Enchanted Rock State Natural Area.
In plain terms. Today is about average for August. The forecast high of 101°F is in line with the 99°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. swimming is the strongest bet in San Antonio today at 10/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Active alerts for San Antonio
Heat Advisory issued August 21 at 1:48PM CDT until August 23 at 7:00PM CDT by NWS Austin/San Antonio TX
Issued by NWS Austin/San Antonio TX
Weather in San Antonio right now
Source: Open-Meteo. Updated 10:45 PM, Aug 21 local time.
See the San Antonio forecast by time range
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for San Antonio
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Fri, Aug 21 | ⛅ Partly cloudy | 101° / 78° | 0% | 9 mph | 8 |
| Sat, Aug 22 | ☁️ Overcast | 104° / 77° | 1% | 10 mph | 8 |
| Sun, Aug 23 | ☁️ Overcast | 103° / 76° | 1% | 16 mph | 8 |
| Mon, Aug 24 | ☁️ Overcast | 102° / 74° | 0% | 15 mph | 8 |
| Tue, Aug 25 | ⛅ Partly cloudy | 103° / 75° | 0% | 15 mph | 8 |
| Wed, Aug 26 | ☁️ Overcast | 103° / 76° | 1% | 15 mph | 8 |
| Thu, Aug 27 | ☁️ Overcast | 102° / 77° | 3% | 12 mph | 8 |
| Fri, Aug 28 | 🌦️ Light drizzle | 103° / 76° | 4% · 0,0 in | 16 mph | 8 |
| Sat, Aug 29 | 🌤️ Mainly clear | 102° / 75° | 3% | 16 mph | 8 |
| Sun, Aug 30 | 🌤️ Mainly clear | 103° / 76° | 2% | 17 mph | 8 |
| Mon, Aug 31 | ☀️ Clear sky | 103° / 76° | 2% | 18 mph | 8 |
| Tue, Sep 1 | ☁️ Overcast | 103° / 75° | 8% | 15 mph | 9 |
| Wed, Sep 2 | ⛅ Partly cloudy | 102° / 75° | 10% | 14 mph | 9 |
| Thu, Sep 3 | ☀️ Clear sky | 103° / 75° | 13% | 15 mph | 8 |
| Fri, Sep 4 | 🌤️ Mainly clear | 103° / 75° | 10% | 14 mph | 8 |
| Sat, Sep 5 | ⛅ Partly cloudy | 103° / 76° | 11% | 14 mph | 8 |
Climate in San Antonio month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 61° | 42° | 2,4 in | ★★★☆☆ |
| February | 71° | 50° | 1,9 in | ★★★★☆ |
| March | 80° | 58° | 3,1 in | ★★★★☆ |
| April | 82° | 64° | 6,1 in | ★★★☆☆ |
| May | 88° | 69° | 7,7 in | ★★★☆☆ |
| June | 92° | 75° | 5,2 in | ★★★☆☆ |
| July | 93° | 75° | 5,8 in | ★★★☆☆ |
| August | 99° | 78° | 0,7 in | ★★★★☆ |
| September | 93° | 74° | 1,5 in | ★★★★☆ |
| October | 86° | 66° | 3,3 in | ★★★★☆ |
| November | 74° | 56° | 2,0 in | ★★★★☆ |
| December | 69° | 50° | 1,6 in | ★★★★☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Weather map for San Antonio
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in San Antonio
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit San Antonio
Go in February, March, August, September, October, November and December. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: April, May and July - expect the least comfortable mix of heat, cold or rain.
Explore San Antonio
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is San Antonio?
San Antonio is a city in Texas. Its coordinates are 29.4241, -98.4936. It lies in North America.
What is the weather like in San Antonio right now?
It is currently 89°F (32°C) with clear. Humidity is 57% and wind is 10 mph.
When is the best time to visit San Antonio?
February, March, August, September, October, November and December offer the most comfortable conditions in San Antonio, which has a temperate climate. April, May and July are usually the hardest months for outdoor plans.
What time zone is San Antonio in?
San Antonio observes America/Chicago (UTC-05:00). The local time is 10:45 PM.
How many people live in San Antonio?
San Antonio has a population of approximately 1.5 million.
What is the nearest airport to San Antonio?
The closest airports are Austin-Bergstrom International Airport (AUS), 73 mi away, George Bush Intercontinental Airport (IAH), 193 mi away and Dallas/Fort Worth International Airport (DFW), 255 mi away.
What are the top things to do in San Antonio?
Popular options include Enchanted Rock State Natural Area.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (cities-us) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 21, 2026 at 10:45 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
