Average annual temperature is 25.1 °C
Absolute maximum temperature: 40.8 °C
Absolute minimum temperature: 7.8 °C
Number of sunny days: 147 days
Number of rainy days: 218 days
Look at detailed online map of San Guillermo
* Weather data for San Guillermo 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) | 33.2 | 34.7 | 38.1 | 35.6 | 37.0 | 40.8 | 37.1 | 38.3 | 37.2 | 37.5 | 32.7 | 31.6 |
| Average daytime temperature (°C) | 27.2 | 26.9 | 30.0 | 31.1 | 33.7 | 36.1 | 35.0 | 35.7 | 35.9 | 32.1 | 26.4 | 24.3 |
| Average temperature (°C) | 21.1 | 20.4 | 23.5 | 25.1 | 27.2 | 29.4 | 28.8 | 29.1 | 29.1 | 26.3 | 21.5 | 19.6 |
| Average night temperature (°C) | 16.9 | 16.3 | 19.6 | 21.0 | 22.5 | 24.8 | 24.3 | 24.5 | 24.5 | 22.0 | 17.9 | 16.2 |
| Absolute minimum temperature (°C) | 8.0 | 7.8 | 11.7 | 17.2 | 17.9 | 22.7 | 21.1 | 22.5 | 22.9 | 13.6 | 13.2 | 10.1 |
| 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 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.9 | 11.4 | 12.0 | 12.7 | 13.2 | 13.5 | 13.4 | 12.9 | 12.3 | 11.6 | 11.1 | 10.8 |
| Daylight minimum duration (h) | 10.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.4 | 9.2 | 9.4 | 10.1 | 11.3 | 12.1 | 12.1 | 11.3 | 11.1 | 8.7 | 7.0 | 5.8 |
| Precipitation (mm) | 4 | 13 | 36 | 36 | 41 | 39 | 74 | 71 | 62 | 61 | 40 | 65 |
| Sunny days | 22 | 18 | 17 | 11 | 10 | 13 | 3 | 5 | 5 | 9 | 18 | 16 |
| Rainy days | 9 | 10 | 14 | 19 | 21 | 17 | 28 | 26 | 25 | 22 | 12 | 15 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Guillermo is at