Average annual temperature is 23.6 °C
Absolute maximum temperature: 44.4 °C
Absolute minimum temperature: 1.5 °C
Number of sunny days: 260 days
Number of rainy days: 104 days
Number of snow days: 1 day
Look at detailed online map of San Marcos
* Weather data for San Marcos Mexico is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 30.3 | 35.9 | 36.9 | 38.2 | 39.8 | 44.4 | 40.1 | 41.0 | 39.5 | 33.7 | 34.5 | 28.4 |
| Average daytime temperature (°C) | 23.7 | 24.3 | 29.4 | 30.9 | 32.2 | 39.2 | 37.0 | 37.5 | 36.2 | 27.4 | 21.6 | 20.9 |
| Average temperature (°C) | 16.6 | 16.7 | 21.0 | 23.1 | 25.6 | 32.3 | 31.1 | 31.6 | 30.2 | 22.3 | 16.3 | 15.4 |
| Average night temperature (°C) | 10.4 | 10.8 | 15.0 | 17.4 | 19.9 | 26.3 | 25.9 | 26.1 | 24.8 | 18.3 | 12.3 | 10.8 |
| Absolute minimum temperature (°C) | 3.7 | 1.5 | 1.9 | 12.3 | 16.5 | 20.3 | 23.1 | 22.7 | 22.2 | 5.5 | 5.7 | 5.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.7 | 11.2 | 12.0 | 12.8 | 13.5 | 13.8 | 13.7 | 13.1 | 12.3 | 11.5 | 10.8 | 10.5 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 9.2 | 9.4 | 9.4 | 10.1 | 10.7 | 12.3 | 12.0 | 11.8 | 11.3 | 7.9 | 7.1 | 8.3 |
| Precipitation (mm) | 0 | 0 | 31 | 15 | 51 | 6 | 14 | 8 | 7 | 76 | 30 | 15 |
| Sunny days | 28 | 25 | 23 | 23 | 13 | 20 | 21 | 24 | 24 | 13 | 21 | 25 |
| Rainy days | 3 | 2 | 8 | 7 | 18 | 10 | 10 | 7 | 6 | 18 | 9 | 6 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Marcos is at