Average annual temperature is 25.4 °C
Absolute maximum temperature: 35.1 °C
Absolute minimum temperature: 15.2 °C
Number of sunny days: 132 days
Number of rainy days: 233 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) | 33.0 | 34.1 | 32.9 | 33.8 | 35.1 | 32.3 | 32.5 | 32.4 | 31.8 | 31.0 | 31.4 | 32.7 |
| Average daytime temperature (°C) | 30.4 | 31.2 | 31.2 | 31.5 | 33.0 | 30.7 | 30.6 | 30.5 | 30.3 | 29.4 | 30.1 | 30.5 |
| Average temperature (°C) | 24.2 | 25.1 | 25.5 | 26.2 | 27.7 | 26.3 | 25.6 | 25.5 | 25.1 | 24.6 | 24.8 | 24.0 |
| Average night temperature (°C) | 18.9 | 19.9 | 20.5 | 21.5 | 23.1 | 22.8 | 21.5 | 21.7 | 21.0 | 21.1 | 20.7 | 18.9 |
| Absolute minimum temperature (°C) | 16.3 | 18.1 | 17.8 | 19.3 | 20.5 | 20.0 | 20.3 | 20.0 | 19.6 | 18.7 | 19.0 | 15.2 |
| 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) | 11.3 | 11.6 | 12.0 | 12.5 | 12.9 | 13.1 | 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 | 13.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.5 | 10.8 | 11.0 | 11.2 | 11.4 | 10.3 | 10.0 | 9.7 | 10.0 | 9.3 | 10.2 | 10.1 |
| Precipitation (mm) | 1 | 4 | 10 | 17 | 56 | 180 | 264 | 359 | 269 | 212 | 70 | 13 |
| Sunny days | 27 | 22 | 21 | 20 | 10 | 1 | 0 | 1 | 1 | 3 | 6 | 20 |
| Rainy days | 4 | 6 | 10 | 10 | 21 | 29 | 31 | 30 | 29 | 28 | 24 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in La Unión is at