Average annual temperature is 15.8 °C
Absolute maximum temperature: 27.3 °C
Absolute minimum temperature: 5.1 °C
Number of sunny days: 104 days
Number of rainy days: 261 days
Look at detailed online map of Río San Marcos
* Weather data for Río 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) | 22.2 | 24.9 | 25.3 | 26.9 | 27.3 | 27.0 | 22.8 | 22.9 | 24.3 | 22.7 | 22.9 | 20.4 |
| Average daytime temperature (°C) | 20.0 | 21.4 | 22.9 | 23.5 | 22.9 | 23.8 | 21.2 | 21.0 | 21.7 | 20.4 | 20.4 | 18.9 |
| Average temperature (°C) | 13.5 | 14.4 | 15.7 | 16.7 | 16.9 | 17.7 | 16.4 | 16.3 | 16.6 | 15.9 | 15.4 | 13.9 |
| Average night temperature (°C) | 8.7 | 9.4 | 10.6 | 11.8 | 12.8 | 13.5 | 12.9 | 12.9 | 13.0 | 12.5 | 11.5 | 9.7 |
| Absolute minimum temperature (°C) | 6.5 | 5.1 | 7.8 | 10.1 | 11.1 | 11.0 | 11.9 | 11.5 | 11.8 | 9.6 | 8.8 | 6.2 |
| 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 | 11.7 | 11.4 | 11.4 | 10.4 | 9.9 | 10.5 | 9.6 | 10.0 | 9.6 |
| Precipitation (mm) | 3 | 4 | 12 | 50 | 122 | 70 | 185 | 185 | 86 | 186 | 63 | 16 |
| Sunny days | 23 | 17 | 8 | 11 | 2 | 4 | 0 | 0 | 2 | 4 | 11 | 22 |
| Rainy days | 8 | 11 | 23 | 19 | 29 | 26 | 31 | 31 | 28 | 27 | 19 | 9 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Río San Marcos is at