Average annual temperature is 21.1 °C
Absolute maximum temperature: 39.4 °C
Absolute minimum temperature: 4.4 °C
Number of sunny days: 203 days
Number of rainy days: 162 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) | 31.6 | 34.3 | 37.5 | 35.6 | 34.6 | 39.4 | 37.1 | 37.8 | 36.3 | 32.9 | 34.5 | 30.2 |
| Average daytime temperature (°C) | 25.0 | 25.8 | 28.9 | 27.0 | 28.9 | 33.1 | 32.9 | 32.9 | 32.9 | 27.0 | 23.8 | 21.2 |
| Average temperature (°C) | 16.8 | 17.2 | 20.4 | 20.6 | 22.3 | 25.8 | 25.7 | 25.5 | 25.4 | 20.9 | 16.9 | 15.0 |
| Average night temperature (°C) | 10.5 | 10.5 | 13.4 | 15.1 | 16.2 | 18.3 | 18.0 | 18.3 | 17.8 | 16.0 | 12.0 | 10.7 |
| Absolute minimum temperature (°C) | 4.4 | 4.4 | 5.2 | 11.4 | 13.3 | 15.2 | 15.0 | 17.0 | 16.2 | 6.9 | 7.4 | 5.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 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) | 10.9 | 11.4 | 12.0 | 12.7 | 13.3 | 13.6 | 13.4 | 12.9 | 12.3 | 11.6 | 11.0 | 10.7 |
| 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 | 10.1 | 10.5 | 10.4 | 11.2 | 12.5 | 12.3 | 11.3 | 11.3 | 9.0 | 7.9 | 6.7 |
| Precipitation (mm) | 5 | 2 | 27 | 83 | 115 | 52 | 23 | 29 | 29 | 35 | 25 | 41 |
| Sunny days | 23 | 24 | 19 | 9 | 5 | 18 | 18 | 13 | 22 | 16 | 18 | 18 |
| Rainy days | 8 | 4 | 12 | 21 | 26 | 12 | 13 | 18 | 8 | 15 | 12 | 13 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in La Unión is at