Average annual temperature is 24.6 °C
Absolute maximum temperature: 37.8 °C
Absolute minimum temperature: 12.8 °C
Number of sunny days: 57 days
Number of rainy days: 308 days
Look at detailed online map of San Marcos
* Weather data for San Marcos 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) | 30.0 | 30.5 | 32.8 | 36.7 | 35.4 | 37.8 | 31.2 | 32.7 | 31.4 | 33.6 | 29.6 | 30.1 |
| Average daytime temperature (°C) | 26.8 | 27.1 | 30.1 | 32.5 | 32.4 | 34.0 | 30.1 | 30.6 | 30.3 | 29.7 | 26.9 | 25.4 |
| Average temperature (°C) | 21.9 | 22.1 | 24.6 | 26.1 | 26.8 | 28.1 | 25.0 | 25.5 | 25.1 | 25.1 | 23.5 | 21.9 |
| Average night temperature (°C) | 17.8 | 18.1 | 20.1 | 20.8 | 22.1 | 23.3 | 21.6 | 21.8 | 21.6 | 22.1 | 21.0 | 19.1 |
| Absolute minimum temperature (°C) | 12.8 | 15.5 | 16.0 | 17.2 | 19.8 | 20.0 | 18.3 | 19.1 | 19.8 | 20.2 | 16.9 | 13.5 |
| 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 | 11.6 | 12.1 | 12.5 | 12.9 | 13.0 | 13.0 | 12.6 | 12.2 | 11.8 | 11.4 | 11.2 |
| 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) | 9.3 | 9.5 | 10.4 | 11.3 | 11.3 | 11.1 | 9.9 | 10.4 | 10.1 | 9.3 | 5.8 | 6.7 |
| Precipitation (mm) | 131 | 151 | 144 | 90 | 171 | 153 | 489 | 350 | 485 | 471 | 571 | 286 |
| Sunny days | 7 | 8 | 9 | 13 | 6 | 6 | 0 | 0 | 0 | 1 | 3 | 4 |
| Rainy days | 24 | 20 | 22 | 17 | 25 | 24 | 31 | 31 | 30 | 30 | 27 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Marcos is at