Average annual temperature is 25.8 °C
Absolute maximum temperature: 38.4 °C
Absolute minimum temperature: 13.9 °C
Number of sunny days: 84 days
Number of rainy days: 281 days
Look at detailed online map of San Marcos Uno
* Weather data for San Marcos Uno 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) | 30.8 | 30.4 | 32.4 | 37.7 | 34.7 | 38.4 | 32.7 | 33.5 | 34.1 | 36.0 | 30.2 | 30.7 |
| Average daytime temperature (°C) | 27.2 | 27.3 | 30.0 | 32.2 | 32.7 | 34.1 | 31.1 | 31.8 | 32.4 | 31.4 | 27.8 | 27.1 |
| Average temperature (°C) | 22.9 | 23.0 | 25.1 | 26.5 | 27.7 | 28.6 | 26.6 | 27.2 | 27.3 | 26.9 | 24.6 | 23.5 |
| Average night temperature (°C) | 19.6 | 19.8 | 21.3 | 22.1 | 23.6 | 24.3 | 23.5 | 23.8 | 23.7 | 23.6 | 22.1 | 20.6 |
| Absolute minimum temperature (°C) | 14.3 | 17.8 | 19.0 | 19.9 | 22.2 | 22.4 | 22.6 | 22.2 | 23.1 | 21.6 | 19.7 | 13.9 |
| 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 | 12.8 | 13.0 | 12.9 | 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) | 9.7 | 9.4 | 10.7 | 11.4 | 11.0 | 11.2 | 10.6 | 10.6 | 10.6 | 9.8 | 7.2 | 7.8 |
| Precipitation (mm) | 128 | 143 | 66 | 35 | 62 | 273 | 393 | 165 | 129 | 170 | 658 | 137 |
| Sunny days | 14 | 6 | 12 | 17 | 12 | 9 | 1 | 1 | 0 | 4 | 2 | 6 |
| Rainy days | 17 | 22 | 19 | 13 | 19 | 21 | 30 | 30 | 30 | 27 | 28 | 25 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Marcos Uno is at