Average annual temperature is 26.9 °C
Absolute maximum temperature: 40.4 °C
Absolute minimum temperature: 13.2 °C
Number of sunny days: 136 days
Number of rainy days: 229 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) | 32.0 | 34.1 | 36.1 | 38.4 | 39.1 | 40.4 | 37.7 | 37.1 | 36.5 | 37.0 | 33.6 | 33.1 |
| Average daytime temperature (°C) | 29.7 | 31.0 | 33.5 | 35.3 | 35.9 | 36.8 | 35.6 | 35.0 | 35.0 | 33.1 | 30.5 | 28.5 |
| Average temperature (°C) | 24.1 | 24.9 | 26.6 | 28.0 | 28.5 | 29.6 | 28.8 | 28.6 | 28.1 | 27.1 | 25.5 | 23.4 |
| Average night temperature (°C) | 20.0 | 20.5 | 21.7 | 22.6 | 23.4 | 24.7 | 24.7 | 24.6 | 23.9 | 23.1 | 22.2 | 20.1 |
| Absolute minimum temperature (°C) | 14.0 | 15.2 | 18.6 | 18.6 | 18.0 | 21.5 | 23.7 | 23.4 | 22.1 | 18.8 | 19.9 | 13.2 |
| 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) | 9.5 | 10.0 | 10.5 | 11.6 | 11.8 | 11.7 | 11.2 | 11.6 | 11.1 | 10.3 | 9.4 | 8.9 |
| Precipitation (mm) | 27 | 12 | 17 | 13 | 21 | 50 | 73 | 78 | 101 | 60 | 54 | 61 |
| Sunny days | 16 | 18 | 22 | 23 | 14 | 11 | 2 | 1 | 0 | 10 | 8 | 11 |
| Rainy days | 15 | 10 | 9 | 7 | 17 | 19 | 29 | 30 | 30 | 21 | 22 | 20 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Unión is at