Average annual temperature is 22.3 °C
Absolute maximum temperature: 30.4 °C
Absolute minimum temperature: 10.3 °C
Number of sunny days: 45
Number of rainy days: 320
Number of snow days:
Average annual precipitation: 2845 mm
Look at detailed online map of Santo Tomás La Unión
* Weather data for Santo Tomás La Unión Guatemala is based on climate observations for 2023 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 28.9 | 30.4 | 29.5 | 29.7 | 30 | 27.1 | 27.3 | 27.3 | 27.7 | 26.3 | 26.3 | 27.9 |
| Average daytime temperature (°C) | 25.6 | 28.1 | 26.6 | 27.6 | 27.5 | 25.6 | 25.8 | 25.7 | 25.7 | 24.8 | 24.8 | 25.6 |
| Average temperature (°C) | 21 | 22.1 | 22.2 | 22.9 | 23.7 | 23.1 | 22.7 | 22.6 | 22.6 | 21.9 | 22 | 21.1 |
| Average night temperature (°C) | 16.5 | 17.1 | 18.3 | 18.8 | 19.9 | 20.4 | 18.9 | 18.9 | 19.1 | 18.8 | 18.7 | 16.6 |
| Absolute minimum temperature (°C) | 14.6 | 14.5 | 16.1 | 15.7 | 18.7 | 18.3 | 16.4 | 15.5 | 16.8 | 16.1 | 16.5 | 10.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.5 | 11.8 | 12.3 | 12.7 | 12.9 | 13 | 13 | 12.8 | 12.4 | 12 | 11.6 | 11.3 |
| Daylight mean duration (h) | 11.4 | 11.7 | 12.1 | 12.5 | 12.8 | 13 | 12.9 | 12.6 | 12.2 | 11.8 | 11.5 | 11.3 |
| Daylight minimum duration (h) | 11.3 | 11.5 | 11.9 | 12.3 | 12.7 | 12.9 | 12.8 | 12.4 | 12 | 11.6 | 11.3 | 11.3 |
| Sunshine mean duration (h) | 10.3 | 10.6 | 10.4 | 10.7 | 10.6 | 9.2 | 9.6 | 8.9 | 9.3 | 8.3 | 9.1 | 10.1 |
| Precipitation (mm) | 33 | 14 | 138 | 116 | 254 | 306 | 358 | 287 | 421 | 630 | 231 | 55 |
| Sunny days | 10 | 13 | 3 | 1 | 3 | 3 | 12 | |||||
| Rainy days | 21 | 15 | 28 | 29 | 28 | 30 | 31 | 31 | 30 | 31 | 27 | 19 |
The largest precipitation sum in Santo Tomás La Unión is at