Average annual temperature is 16.1 °C
Absolute maximum temperature: 28.6 °C
Absolute minimum temperature: 5.0 °C
Number of sunny days: 106 days
Number of rainy days: 259 days
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) | 23.1 | 25.6 | 25.8 | 26.9 | 28.6 | 28.4 | 24.2 | 23.9 | 24.9 | 24.5 | 23.5 | 22.1 |
| Average daytime temperature (°C) | 21.3 | 22.8 | 23.7 | 24.5 | 24.3 | 24.9 | 22.5 | 22.3 | 22.6 | 22.1 | 21.7 | 20.3 |
| Average temperature (°C) | 14.1 | 15.0 | 15.8 | 16.8 | 17.3 | 18.1 | 16.6 | 16.7 | 16.8 | 16.4 | 15.9 | 14.1 |
| Average night temperature (°C) | 8.2 | 8.9 | 9.7 | 10.6 | 12.0 | 13.3 | 12.4 | 12.9 | 12.7 | 12.4 | 11.4 | 9.1 |
| Absolute minimum temperature (°C) | 5.8 | 5.2 | 7.5 | 9.0 | 10.0 | 10.7 | 10.3 | 11.4 | 11.3 | 9.9 | 7.9 | 5.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.2 | 11.6 | 12.0 | 12.5 | 12.9 | 13.2 | 13.1 | 12.7 | 12.2 | 11.7 | 11.3 | 11.1 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.4 | 10.7 | 11.2 | 11.6 | 11.5 | 11.0 | 9.7 | 9.6 | 10.0 | 9.6 | 9.9 | 9.7 |
| Precipitation (mm) | 4 | 2 | 9 | 32 | 93 | 54 | 249 | 250 | 128 | 158 | 36 | 7 |
| Sunny days | 21 | 19 | 9 | 10 | 6 | 7 | 0 | 0 | 3 | 2 | 9 | 20 |
| Rainy days | 10 | 9 | 22 | 20 | 25 | 23 | 31 | 31 | 27 | 29 | 21 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Marcos is at