Average annual temperature is 18.8 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: -1.9 °C
Number of sunny days: 277 days
Number of rainy days: 88 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) | 24.1 | 27.1 | 29.5 | 29.7 | 33.1 | 36.4 | 35.6 | 36.5 | 33.9 | 31.8 | 27.1 | 23.4 |
| Average daytime temperature (°C) | 19.8 | 20.4 | 24.7 | 26.8 | 28.2 | 33.8 | 32.0 | 31.3 | 31.5 | 24.0 | 21.3 | 19.3 |
| Average temperature (°C) | 11.8 | 11.9 | 16.5 | 19.2 | 20.8 | 26.2 | 25.6 | 24.3 | 24.8 | 17.7 | 14.6 | 11.6 |
| Average night temperature (°C) | 4.7 | 5.1 | 9.2 | 11.5 | 13.7 | 18.1 | 18.7 | 18.1 | 17.7 | 12.8 | 9.4 | 4.9 |
| Absolute minimum temperature (°C) | -1.0 | -1.9 | 2.1 | 7.6 | 10.9 | 13.5 | 15.5 | 16.1 | 15.4 | 4.8 | 0.6 | -0.4 |
| 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) | 9.5 | 9.7 | 10.1 | 11.5 | 11.2 | 12.1 | 12.2 | 11.4 | 11.2 | 7.8 | 8.6 | 9.3 |
| Precipitation (mm) | 2 | 12 | 10 | 0 | 35 | 4 | 40 | 33 | 15 | 60 | 23 | 0 |
| Sunny days | 29 | 26 | 26 | 28 | 18 | 24 | 17 | 14 | 22 | 17 | 25 | 31 |
| Rainy days | 2 | 2 | 5 | 2 | 13 | 6 | 14 | 17 | 8 | 14 | 5 | 0 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Marcos is at