Average annual temperature is 18.2 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: 2.8 °C
Number of sunny days: 183 days
Number of rainy days: 182 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) | 27.6 | 31.2 | 32.6 | 33.7 | 32.7 | 34.5 | 29.2 | 32.7 | 30.0 | 29.6 | 31.2 | 24.5 |
| Average daytime temperature (°C) | 23.2 | 24.5 | 27.5 | 27.8 | 28.0 | 30.6 | 26.9 | 26.6 | 28.1 | 23.8 | 22.6 | 18.6 |
| Average temperature (°C) | 14.9 | 15.5 | 18.9 | 20.0 | 20.5 | 22.6 | 20.0 | 19.9 | 20.5 | 17.7 | 15.2 | 13.0 |
| Average night temperature (°C) | 9.0 | 9.4 | 12.7 | 14.5 | 15.0 | 16.2 | 14.9 | 15.1 | 14.7 | 13.3 | 10.2 | 9.1 |
| Absolute minimum temperature (°C) | 4.8 | 2.8 | 4.1 | 10.0 | 12.5 | 13.2 | 12.9 | 11.3 | 12.6 | 7.4 | 5.6 | 4.8 |
| 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) | 11.0 | 11.5 | 12.0 | 12.6 | 13.1 | 13.4 | 13.3 | 12.8 | 12.3 | 11.7 | 11.2 | 10.9 |
| 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) | 10.0 | 10.1 | 10.7 | 11.2 | 11.7 | 12.4 | 11.8 | 10.9 | 11.3 | 8.7 | 8.5 | 6.7 |
| Precipitation (mm) | 1 | 3 | 18 | 29 | 59 | 13 | 30 | 34 | 5 | 45 | 13 | 37 |
| Sunny days | 27 | 23 | 21 | 10 | 10 | 18 | 8 | 5 | 18 | 11 | 21 | 11 |
| Rainy days | 4 | 5 | 10 | 20 | 21 | 12 | 23 | 26 | 12 | 20 | 9 | 20 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Guillermo is at