Average annual temperature is 16.6 °C
Absolute maximum temperature: 31.9 °C
Absolute minimum temperature: 5.7 °C
Number of sunny days: 263 days
Number of rainy days: 102 days
Look at detailed online map of Unión
* Weather data for 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) | 22.1 | 22.7 | 19.9 | 24.0 | 20.9 | 23.0 | 28.2 | 30.4 | 30.8 | 31.9 | 28.3 | 22.7 |
| Average daytime temperature (°C) | 17.1 | 17.1 | 17.2 | 18.9 | 19.7 | 21.3 | 25.0 | 25.8 | 25.4 | 25.0 | 22.8 | 19.8 |
| Average temperature (°C) | 13.0 | 12.6 | 13.2 | 14.5 | 16.1 | 17.6 | 19.9 | 21.0 | 20.7 | 19.1 | 17.1 | 14.6 |
| Average night temperature (°C) | 9.3 | 8.6 | 9.7 | 11.3 | 13.4 | 14.8 | 16.0 | 17.5 | 17.0 | 14.6 | 12.0 | 10.2 |
| Absolute minimum temperature (°C) | 5.7 | 6.1 | 6.2 | 6.6 | 11.2 | 13.5 | 13.7 | 15.7 | 14.0 | 11.3 | 6.5 | 6.4 |
| 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 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.3 | 11.4 | 10.6 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.4 | 8.9 | 9.5 | 11.1 | 11.5 | 12.1 | 12.3 | 11.0 | 11.1 | 10.6 | 8.9 | 8.7 |
| Precipitation (mm) | 39 | 24 | 45 | 3 | 6 | 8 | 0 | 75 | 1 | 1 | 32 | 44 |
| Sunny days | 16 | 16 | 22 | 20 | 17 | 19 | 28 | 25 | 24 | 29 | 23 | 24 |
| Rainy days | 15 | 12 | 9 | 10 | 14 | 11 | 3 | 6 | 6 | 2 | 7 | 7 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Unión is at