Average annual temperature is 26.8 °C
Absolute maximum temperature: 39.1 °C
Absolute minimum temperature: 13.5 °C
Number of sunny days: 137 days
Number of rainy days: 228 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) | 32.4 | 32.7 | 35.5 | 38.5 | 38.9 | 39.1 | 38.6 | 38.2 | 35.7 | 36.8 | 34.2 | 32.9 |
| Average daytime temperature (°C) | 29.7 | 30.5 | 33.0 | 35.3 | 35.9 | 36.3 | 35.8 | 34.8 | 34.5 | 33.7 | 30.6 | 28.5 |
| Average temperature (°C) | 23.9 | 24.5 | 26.3 | 27.8 | 28.5 | 29.2 | 28.9 | 28.2 | 27.8 | 27.4 | 25.5 | 23.3 |
| Average night temperature (°C) | 19.6 | 19.9 | 21.1 | 22.0 | 22.8 | 24.1 | 24.7 | 24.4 | 23.6 | 23.1 | 22.0 | 20.0 |
| Absolute minimum temperature (°C) | 14.1 | 15.2 | 17.6 | 18.4 | 17.4 | 21.4 | 23.6 | 22.6 | 22.0 | 18.1 | 19.5 | 13.5 |
| 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 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 11.0 | 11.5 | 12.0 | 12.6 | 13.1 | 13.4 | 13.3 | 12.8 | 12.3 | 11.7 | 11.1 | 10.9 |
| Daylight minimum duration (h) | 10.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 9.2 | 10.1 | 10.4 | 11.5 | 11.5 | 11.6 | 10.8 | 10.8 | 10.9 | 10.5 | 9.6 | 8.9 |
| Precipitation (mm) | 44 | 19 | 41 | 13 | 63 | 76 | 101 | 156 | 139 | 51 | 66 | 48 |
| Sunny days | 17 | 16 | 24 | 18 | 14 | 10 | 4 | 2 | 1 | 12 | 8 | 11 |
| Rainy days | 14 | 12 | 7 | 12 | 17 | 20 | 27 | 29 | 29 | 19 | 22 | 20 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Unión is at