Average annual temperature is 16.9 °C
Absolute maximum temperature: 40.8 °C
Absolute minimum temperature: -6.1 °C
Number of sunny days: 282 days
Number of rainy days: 81 days
Number of snow days: 2 days
Look at detailed online map of San Antonio
* Weather data for San Antonio United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 16.7 | 20.0 | 25.3 | 31.3 | 32.5 | 39.8 | 40.8 | 40.0 | 37.7 | 30.8 | 26.7 | 17.6 |
| Average daytime temperature (°C) | 11.0 | 13.8 | 18.7 | 24.7 | 29.1 | 34.0 | 38.4 | 35.2 | 32.0 | 25.9 | 17.3 | 11.8 |
| Average temperature (°C) | 4.2 | 5.9 | 10.8 | 16.1 | 21.6 | 26.6 | 31.4 | 27.8 | 24.4 | 18.2 | 10.1 | 5.1 |
| Average night temperature (°C) | -1.2 | -0.2 | 3.7 | 7.3 | 13.0 | 17.7 | 23.1 | 20.4 | 16.8 | 10.6 | 4.0 | -0.1 |
| Absolute minimum temperature (°C) | -6.1 | -5.9 | -3.4 | -3.8 | 7.8 | 12.8 | 19.6 | 17.2 | 12.9 | -0.9 | -1.5 | -5.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 8.1 | 9.0 | 9.4 | 11.8 | 12.5 | 12.8 | 12.9 | 11.7 | 11.0 | 10.3 | 9.1 | 8.4 |
| Precipitation (mm) | 20 | 10 | 16 | 0 | 7 | 2 | 1 | 21 | 12 | 1 | 16 | 14 |
| Sunny days | 22 | 18 | 20 | 26 | 21 | 26 | 27 | 21 | 22 | 28 | 23 | 28 |
| Rainy days | 8 | 9 | 11 | 4 | 10 | 4 | 4 | 10 | 8 | 3 | 7 | 3 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Antonio is at