Average annual temperature is 24.0 °C
Absolute maximum temperature: 34.8 °C
Absolute minimum temperature: 14.5 °C
Number of sunny days: 90 days
Number of rainy days: 275 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) | 33.9 | 34.8 | 31.8 | 33.0 | 33.7 | 30.2 | 30.5 | 30.9 | 30.4 | 29.5 | 29.6 | 33.0 |
| Average daytime temperature (°C) | 29.4 | 31.3 | 30.0 | 31.3 | 30.9 | 29.2 | 28.8 | 28.8 | 28.8 | 27.5 | 27.9 | 30.0 |
| Average temperature (°C) | 22.8 | 24.1 | 23.9 | 24.8 | 25.1 | 24.7 | 23.9 | 24.0 | 23.8 | 23.1 | 23.6 | 23.9 |
| Average night temperature (°C) | 17.1 | 18.4 | 19.0 | 19.4 | 20.0 | 21.1 | 19.3 | 19.3 | 19.3 | 19.5 | 19.5 | 19.1 |
| Absolute minimum temperature (°C) | 14.5 | 15.4 | 15.6 | 14.7 | 18.7 | 18.7 | 17.1 | 17.3 | 17.4 | 17.7 | 16.4 | 16.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.3 | 11.6 | 12.1 | 12.5 | 12.8 | 13.0 | 12.9 | 12.6 | 12.2 | 11.8 | 11.4 | 11.2 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.5 | 10.9 | 10.8 | 11.2 | 11.4 | 10.4 | 9.3 | 9.2 | 9.7 | 8.3 | 9.3 | 10.2 |
| Precipitation (mm) | 7 | 4 | 101 | 33 | 98 | 211 | 233 | 252 | 259 | 534 | 91 | 5 |
| Sunny days | 23 | 21 | 6 | 6 | 1 | 0 | 3 | 2 | 0 | 0 | 4 | 24 |
| Rainy days | 8 | 7 | 25 | 24 | 30 | 30 | 28 | 29 | 30 | 31 | 26 | 7 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in La Unión is at