Average annual temperature is 22.1 °C
Absolute maximum temperature: 38.1 °C
Absolute minimum temperature: 9.2 °C
Number of sunny days: 96 days
Number of rainy days: 269 days
Look at detailed online map of La Unión
* Weather data for La Unión Mexico is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 29.6 | 31.3 | 36.0 | 38.1 | 36.2 | 35.8 | 30.2 | 32.4 | 30.3 | 32.3 | 29.3 | 29.1 |
| Average daytime temperature (°C) | 25.6 | 26.2 | 30.6 | 32.6 | 32.3 | 32.7 | 28.8 | 29.6 | 29.1 | 28.0 | 25.5 | 23.8 |
| Average temperature (°C) | 19.0 | 19.6 | 22.4 | 24.1 | 24.6 | 25.4 | 22.7 | 23.0 | 22.6 | 22.2 | 21.0 | 18.9 |
| Average night temperature (°C) | 14.3 | 14.8 | 16.0 | 16.9 | 18.1 | 19.4 | 18.4 | 18.3 | 18.2 | 18.4 | 17.9 | 15.6 |
| Absolute minimum temperature (°C) | 9.9 | 11.4 | 13.4 | 13.8 | 16.7 | 17.4 | 15.8 | 16.5 | 16.7 | 15.1 | 14.7 | 9.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.2 | 11.6 | 12.0 | 12.5 | 12.9 | 13.1 | 13.0 | 12.7 | 12.2 | 11.8 | 11.3 | 11.1 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 9.3 | 9.3 | 10.8 | 11.2 | 11.2 | 11.2 | 10.4 | 10.8 | 10.2 | 9.0 | 7.6 | 7.6 |
| Precipitation (mm) | 47 | 55 | 40 | 36 | 74 | 119 | 181 | 186 | 176 | 159 | 97 | 83 |
| Sunny days | 16 | 11 | 14 | 13 | 8 | 11 | 1 | 3 | 0 | 2 | 8 | 9 |
| Rainy days | 15 | 17 | 17 | 17 | 23 | 19 | 30 | 28 | 30 | 29 | 22 | 22 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in La Unión is at