Average annual temperature is 27.2 °C
Absolute maximum temperature: 42.1 °C
Absolute minimum temperature: 14.4 °C
Number of sunny days: 155 days
Number of rainy days: 210 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) | 31.2 | 34.7 | 38.2 | 40.7 | 40.5 | 42.1 | 35.4 | 35.2 | 35.3 | 33.9 | 31.9 | 31.7 |
| Average daytime temperature (°C) | 29.1 | 30.8 | 34.9 | 37.2 | 36.8 | 37.5 | 33.8 | 33.3 | 32.8 | 31.8 | 29.1 | 27.7 |
| Average temperature (°C) | 24.1 | 25.1 | 28.0 | 30.0 | 29.9 | 30.7 | 28.1 | 28.0 | 27.7 | 26.9 | 25.0 | 23.5 |
| Average night temperature (°C) | 20.3 | 20.9 | 23.1 | 24.6 | 24.5 | 25.6 | 24.2 | 24.2 | 23.8 | 23.3 | 22.1 | 20.3 |
| Absolute minimum temperature (°C) | 14.5 | 15.4 | 20.2 | 22.0 | 19.7 | 22.7 | 22.9 | 22.4 | 22.5 | 19.8 | 20.1 | 14.4 |
| 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) | 11.2 | 11.5 | 12.0 | 12.6 | 13.0 | 13.2 | 13.1 | 12.7 | 12.2 | 11.7 | 11.3 | 11.1 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 9.9 | 9.8 | 10.6 | 11.5 | 11.6 | 11.4 | 10.9 | 11.1 | 10.3 | 10.0 | 8.7 | 8.5 |
| Precipitation (mm) | 39 | 29 | 9 | 9 | 40 | 90 | 145 | 128 | 118 | 179 | 148 | 93 |
| Sunny days | 14 | 14 | 24 | 22 | 20 | 17 | 1 | 8 | 7 | 10 | 6 | 12 |
| Rainy days | 17 | 14 | 7 | 8 | 11 | 13 | 30 | 23 | 23 | 21 | 24 | 19 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in La Unión is at