Average annual temperature is 25.6 °C
Absolute maximum temperature: 39.8 °C
Absolute minimum temperature: 12.6 °C
Number of sunny days: 131 days
Number of rainy days: 234 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) | 34.6 | 36.1 | 37.4 | 38.8 | 39.8 | 39.5 | 33.5 | 34.2 | 33.1 | 32.5 | 32.6 | 33.5 |
| Average daytime temperature (°C) | 32.1 | 32.5 | 34.7 | 36.4 | 36.8 | 35.6 | 32.1 | 31.8 | 31.7 | 30.8 | 29.7 | 29.7 |
| Average temperature (°C) | 24.2 | 24.2 | 26.6 | 27.7 | 28.5 | 27.9 | 25.8 | 25.7 | 25.5 | 24.9 | 23.9 | 22.8 |
| Average night temperature (°C) | 18.7 | 18.8 | 20.6 | 21.4 | 22.7 | 22.7 | 21.9 | 21.8 | 21.6 | 21.1 | 20.1 | 18.2 |
| Absolute minimum temperature (°C) | 13.5 | 14.4 | 18.1 | 19.2 | 19.0 | 21.0 | 20.6 | 20.4 | 20.4 | 17.8 | 16.4 | 12.6 |
| 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) | 11.3 | 11.6 | 12.0 | 12.5 | 12.9 | 13.1 | 13.0 | 12.7 | 12.2 | 11.8 | 11.4 | 11.2 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.5 | 10.7 | 11.1 | 11.6 | 11.6 | 11.1 | 10.5 | 10.2 | 10.5 | 10.2 | 9.8 | 10.0 |
| Precipitation (mm) | 4 | 5 | 16 | 23 | 28 | 142 | 183 | 239 | 113 | 164 | 25 | 9 |
| Sunny days | 22 | 19 | 15 | 21 | 11 | 6 | 1 | 1 | 1 | 3 | 12 | 19 |
| Rainy days | 9 | 9 | 16 | 9 | 20 | 24 | 30 | 30 | 29 | 28 | 18 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Guillermo is at