Average annual temperature is 15.5 °C
Absolute maximum temperature: 31.0 °C
Absolute minimum temperature: 0.8 °C
Number of sunny days: 137 days
Number of rainy days: 228 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) | 23.5 | 27.3 | 28.7 | 30.5 | 28.9 | 31.0 | 25.3 | 27.1 | 26.8 | 25.4 | 26.5 | 19.1 |
| Average daytime temperature (°C) | 19.9 | 21.6 | 24.1 | 24.5 | 24.2 | 26.9 | 22.9 | 22.3 | 24.7 | 20.5 | 19.5 | 15.9 |
| Average temperature (°C) | 12.7 | 13.2 | 16.2 | 17.0 | 17.3 | 19.6 | 16.7 | 16.4 | 17.3 | 15.1 | 13.1 | 10.8 |
| Average night temperature (°C) | 7.2 | 7.2 | 10.4 | 12.0 | 11.9 | 13.6 | 11.9 | 12.0 | 11.8 | 11.1 | 8.6 | 7.2 |
| Absolute minimum temperature (°C) | 1.7 | 0.8 | 2.5 | 8.9 | 9.4 | 11.6 | 10.5 | 10.0 | 10.6 | 5.3 | 3.9 | 1.7 |
| 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 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 11.0 | 11.5 | 12.0 | 12.6 | 13.1 | 13.4 | 13.2 | 12.8 | 12.3 | 11.7 | 11.2 | 10.9 |
| Daylight minimum duration (h) | 10.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 10.0 | 10.1 | 10.7 | 11.0 | 11.7 | 12.4 | 11.9 | 11.1 | 11.3 | 9.1 | 8.5 | 7.1 |
| Precipitation (mm) | 5 | 5 | 27 | 45 | 81 | 36 | 81 | 72 | 12 | 74 | 20 | 66 |
| Sunny days | 22 | 18 | 19 | 5 | 3 | 18 | 3 | 1 | 15 | 9 | 14 | 10 |
| Rainy days | 9 | 10 | 12 | 25 | 28 | 12 | 28 | 30 | 15 | 22 | 16 | 21 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in La Unión is at