Average annual temperature is 10.9 °C
Absolute maximum temperature: 19.9 °C
Absolute minimum temperature: 0.7 °C
Number of sunny days: 69 days
Number of rainy days: 296 days
Look at detailed online map of San Sebastían
* Weather data for San Sebastían Guatemala is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 17.2 | 18.6 | 18.8 | 18.8 | 19.9 | 18.8 | 17.4 | 17.6 | 17.5 | 16.8 | 16.9 | 17.1 |
| Average daytime temperature (°C) | 14.7 | 15.9 | 15.3 | 16.5 | 16.3 | 16.4 | 15.8 | 16.0 | 16.0 | 15.2 | 15.3 | 15.3 |
| Average temperature (°C) | 9.0 | 9.7 | 10.6 | 11.7 | 12.2 | 12.2 | 11.4 | 11.5 | 11.4 | 11.2 | 10.8 | 9.6 |
| Average night temperature (°C) | 4.0 | 4.6 | 6.2 | 6.9 | 8.1 | 8.0 | 7.5 | 7.3 | 7.1 | 7.5 | 6.9 | 4.7 |
| Absolute minimum temperature (°C) | 1.7 | 2.0 | 3.5 | 3.5 | 6.7 | 6.3 | 5.9 | 4.7 | 5.6 | 5.7 | 4.2 | 0.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.3 | 11.7 | 12.1 | 12.5 | 12.8 | 13.0 | 12.9 | 12.6 | 12.2 | 11.8 | 11.4 | 11.3 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.2 | 10.7 | 10.8 | 11.2 | 10.7 | 10.0 | 9.4 | 9.2 | 9.7 | 8.6 | 9.4 | 10.2 |
| Precipitation (mm) | 23 | 16 | 122 | 169 | 196 | 167 | 200 | 134 | 128 | 241 | 45 | 12 |
| Sunny days | 12 | 13 | 5 | 6 | 5 | 2 | 3 | 2 | 1 | 0 | 7 | 13 |
| Rainy days | 19 | 15 | 26 | 24 | 26 | 28 | 28 | 29 | 29 | 31 | 23 | 18 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Sebastían is at