Average annual temperature is 16.9 °C
Absolute maximum temperature: 37.4 °C
Absolute minimum temperature: -3.0 °C
Number of sunny days: 228 days
Number of rainy days: 137 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) | 23.6 | 23.7 | 25.8 | 30.6 | 31.4 | 37.4 | 34.9 | 34.2 | 34.0 | 32.3 | 27.5 | 24.2 |
| Average daytime temperature (°C) | 18.0 | 19.2 | 21.6 | 25.5 | 27.6 | 32.6 | 29.9 | 29.6 | 29.8 | 26.3 | 22.1 | 20.4 |
| Average temperature (°C) | 9.5 | 10.3 | 12.7 | 15.9 | 18.7 | 23.6 | 22.7 | 22.2 | 21.9 | 18.5 | 14.5 | 11.5 |
| Average night temperature (°C) | 2.5 | 3.6 | 4.3 | 5.8 | 8.7 | 13.9 | 16.1 | 16.4 | 15.1 | 12.3 | 8.6 | 4.8 |
| Absolute minimum temperature (°C) | -3.0 | -2.4 | -1.7 | 1.3 | 4.4 | 7.6 | 14.2 | 14.2 | 13.2 | 6.7 | 2.5 | -0.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.6 | 11.2 | 12.0 | 12.8 | 13.5 | 13.8 | 13.7 | 13.1 | 12.3 | 11.5 | 10.8 | 10.4 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 9.1 | 9.0 | 10.2 | 11.7 | 12.0 | 12.6 | 12.4 | 11.3 | 11.5 | 9.3 | 9.0 | 9.1 |
| Precipitation (mm) | 11 | 25 | 36 | 1 | 4 | 14 | 98 | 95 | 34 | 22 | 25 | 8 |
| Sunny days | 23 | 19 | 25 | 28 | 25 | 22 | 3 | 5 | 11 | 19 | 22 | 26 |
| Rainy days | 8 | 9 | 6 | 2 | 6 | 8 | 28 | 26 | 19 | 12 | 8 | 5 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in La Unión is at