Average annual temperature is 26.4 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: 20.6 °C
Number of sunny days: 107 days
Number of rainy days: 258 days
Look at detailed online map of San Guillermo
* Weather data for San Guillermo Ecuador 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 | 31.0 | 31.5 | 31.6 | 32.6 | 31.7 | 33.1 | 34.3 | 35.2 | 35.9 | 33.7 | 34.0 |
| Average daytime temperature (°C) | 31.3 | 29.9 | 29.8 | 30.2 | 30.3 | 29.9 | 30.9 | 31.9 | 33.3 | 32.3 | 31.2 | 31.9 |
| Average temperature (°C) | 26.4 | 25.8 | 25.6 | 25.7 | 26.5 | 26.3 | 26.4 | 26.5 | 27.0 | 27.0 | 26.2 | 27.2 |
| Average night temperature (°C) | 22.8 | 23.5 | 23.2 | 23.3 | 24.1 | 23.4 | 22.9 | 22.1 | 22.3 | 23.1 | 22.3 | 23.3 |
| Absolute minimum temperature (°C) | 21.2 | 22.7 | 22.0 | 21.6 | 22.3 | 21.9 | 21.7 | 21.3 | 20.6 | 22.1 | 21.4 | 21.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.2 | 12.2 | 12.2 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 9.1 | 8.1 | 7.7 | 7.6 | 8.7 | 10.0 | 10.3 | 9.9 | 10.0 | 9.3 | 9.2 | 7.8 |
| Precipitation (mm) | 173 | 485 | 545 | 738 | 348 | 160 | 46 | 10 | 1 | 43 | 13 | 50 |
| Sunny days | 8 | 0 | 0 | 1 | 0 | 2 | 11 | 24 | 26 | 9 | 16 | 10 |
| Rainy days | 23 | 28 | 31 | 29 | 31 | 28 | 20 | 7 | 4 | 22 | 14 | 21 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Guillermo is at