Weather radar San Antonio
Real-time precipitation radar · Texas · United States
San Antonio climate table – average temperature, precipitation & sunshine hours
The climate table for San Antonio shows long-term monthly averages (2000–2023): average high and average low temperature in °C, monthly precipitation (mm), rainy days and sunshine hours per month. Data source: ERA5 reanalysis (ECMWF) via the WDTEC Climate Archive.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 17.1° | 19° | 25.4° | 27.8° | 31.3° | 34.6° | 34.9° | 36.4° | 34.5° | 30° | 22.9° | 20.7° |
| Avg low (°C) | 5.8° | 7.4° | 12.8° | 17° | 21.2° | 23.9° | 24.3° | 24.5° | 22.2° | 17.6° | 12.3° | 10.2° |
| Precipitation (mm) | 56 | 32 | 52 | 84 | 117 | 64 | 92 | 36 | 29 | 52 | 53 | 25 |
| Rainy days | 8 | 7 | 8 | 12 | 14 | 9 | 10 | 8 | 4 | 5 | 9 | 7 |
| Sunshine hours | 219 | 205 | 263 | 258 | 319 | 369 | 362 | 364 | 326 | 301 | 218 | 203 |
| Humidity | 63% | 68% | 61% | 68% | 73% | 69% | 68% | 63% | 61% | 62% | 70% | 71% |
Best time to visit San Antonio
The best time to visit San Antonio is typically September. In this month the average high is 34.5°C, precipitation is 29 mm and sunshine duration is 326 hours. The annual average high is 27.9°C, total annual precipitation is 692 mm (101 rainy days/year) and annual sunshine is 3407 hours.
Frequently asked questions about the weather in San Antonio
How up to date is the weather radar for San Antonio?
The weather radar for San Antonio is updated every 5 minutes with new radar data from the US NEXRAD network. A 2-hour forecast animation is also available. Rainfall probability, wind gusts and UV index are available up to 14 days in advance.
What weather data is available for San Antonio?
Besides the rain radar, RadarWeather provides for San Antonio: rainfall probability, thunderstorm warning (CAPE index), wind gusts, UV index, air pressure, humidity, dew point, sunshine hours, snow line and a 14-day forecast based on ICON-D2, ECMWF IFS and GFS.
When are thunderstorms expected in San Antonio?
The thunderstorm potential for San Antonio is calculated from the CAPE index and lightning potential. Active storm cells and severe weather warnings are visible on the radar map in real time. Thunderstorm warnings are issued automatically as soon as storm cells are detected near San Antonio.
What is the climate like in San Antonio?
San Antonio has an annual average high of 27.9°C. The warmest month is August (avg high 36.4°C), the coldest January (avg low 5.8°C). The wettest month is May with 117 mm, the driest December with 25 mm. Total annual precipitation is 692 mm (101 rainy days). Annual sunshine is 3407 hours.
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