Average annual temperature is 20.1 °C
Absolute maximum temperature: 39.9 °C
Absolute minimum temperature: -3.9 °C
Number of sunny days: 262 days
Number of rainy days: 101 days
Number of snow days: 2 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) | 28.4 | 32.0 | 34.5 | 34.2 | 35.8 | 39.9 | 36.4 | 37.6 | 35.9 | 30.8 | 30.5 | 25.2 |
| Average daytime temperature (°C) | 22.4 | 24.4 | 27.9 | 28.3 | 29.5 | 35.5 | 32.5 | 32.6 | 31.7 | 24.2 | 19.7 | 18.6 |
| Average temperature (°C) | 14.7 | 15.2 | 18.8 | 20.3 | 22.4 | 27.8 | 25.9 | 26.0 | 25.0 | 18.3 | 13.7 | 12.5 |
| Average night temperature (°C) | 8.4 | 8.0 | 11.6 | 13.5 | 15.6 | 19.5 | 18.8 | 19.0 | 18.1 | 14.0 | 9.7 | 8.1 |
| Absolute minimum temperature (°C) | -0.9 | -3.9 | -3.1 | 7.3 | 12.7 | 15.1 | 16.8 | 17.2 | 15.7 | 0.5 | 2.6 | 3.8 |
| 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) | 10.8 | 11.3 | 12.0 | 12.8 | 13.4 | 13.7 | 13.5 | 13.0 | 12.3 | 11.6 | 10.9 | 10.6 |
| Daylight minimum duration (h) | 10.0 | 11.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 9.5 | 10.0 | 10.8 | 11.2 | 11.4 | 12.6 | 12.2 | 11.8 | 11.3 | 8.2 | 7.6 | 8.5 |
| Precipitation (mm) | 0 | 0 | 4 | 9 | 27 | 1 | 19 | 9 | 12 | 98 | 57 | 1 |
| Sunny days | 29 | 25 | 23 | 20 | 14 | 27 | 18 | 20 | 23 | 14 | 20 | 29 |
| Rainy days | 2 | 2 | 7 | 10 | 17 | 3 | 13 | 11 | 7 | 17 | 10 | 2 |
| Snow days | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in La Unión is at