Average annual temperature is 25.0 °C
Absolute maximum temperature: 39.2 °C
Absolute minimum temperature: 11.9 °C
Number of sunny days: 122 days
Number of rainy days: 243 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) | 33.4 | 35.0 | 36.3 | 37.0 | 39.2 | 38.6 | 33.6 | 33.6 | 32.1 | 32.2 | 32.0 | 32.7 |
| Average daytime temperature (°C) | 31.4 | 32.0 | 33.8 | 35.0 | 35.5 | 34.4 | 31.7 | 31.1 | 30.7 | 30.0 | 29.1 | 29.1 |
| Average temperature (°C) | 23.5 | 23.9 | 25.8 | 26.8 | 27.6 | 26.9 | 25.3 | 25.1 | 24.8 | 24.3 | 23.5 | 22.3 |
| Average night temperature (°C) | 18.0 | 18.3 | 19.9 | 20.7 | 21.9 | 22.1 | 21.2 | 21.1 | 21.0 | 20.5 | 19.8 | 17.6 |
| Absolute minimum temperature (°C) | 13.5 | 15.2 | 16.5 | 18.9 | 18.6 | 19.8 | 19.5 | 19.6 | 19.9 | 17.0 | 16.5 | 11.9 |
| 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 | 12.7 | 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) | 10.4 | 10.7 | 11.1 | 11.6 | 11.6 | 11.1 | 10.4 | 10.2 | 10.4 | 10.1 | 9.6 | 10.0 |
| Precipitation (mm) | 4 | 5 | 13 | 21 | 33 | 180 | 253 | 306 | 258 | 258 | 47 | 11 |
| Sunny days | 19 | 20 | 16 | 19 | 13 | 4 | 0 | 0 | 0 | 2 | 9 | 20 |
| Rainy days | 12 | 8 | 15 | 11 | 18 | 26 | 31 | 31 | 30 | 29 | 21 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in La Unión is at