Average annual temperature is 24.8 °C
Absolute maximum temperature: 45.8 °C
Absolute minimum temperature: 2.9 °C
Number of sunny days: 238 days
Number of rainy days: 127 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) | 31.4 | 33.9 | 40.1 | 38.0 | 37.2 | 45.8 | 42.6 | 43.0 | 41.0 | 36.7 | 32.8 | 27.8 |
| Average daytime temperature (°C) | 23.8 | 25.2 | 30.4 | 30.2 | 31.9 | 39.7 | 40.2 | 39.8 | 38.4 | 30.1 | 23.1 | 22.5 |
| Average temperature (°C) | 17.7 | 17.8 | 22.6 | 23.5 | 26.2 | 32.3 | 33.3 | 32.9 | 32.1 | 24.4 | 18.2 | 16.6 |
| Average night temperature (°C) | 12.8 | 12.6 | 17.5 | 18.6 | 21.6 | 25.6 | 27.1 | 26.8 | 26.4 | 20.4 | 14.7 | 11.9 |
| Absolute minimum temperature (°C) | 4.6 | 2.9 | 5.9 | 12.7 | 18.8 | 20.3 | 25.1 | 23.4 | 24.1 | 7.9 | 5.5 | 4.8 |
| 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 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.6 | 11.2 | 12.0 | 12.8 | 13.5 | 13.8 | 13.7 | 13.1 | 12.3 | 11.5 | 10.8 | 10.4 |
| 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) | 7.6 | 8.7 | 8.2 | 7.9 | 9.8 | 12.2 | 12.4 | 11.7 | 11.1 | 7.8 | 6.0 | 7.8 |
| Precipitation (mm) | 6 | 7 | 33 | 52 | 150 | 32 | 11 | 83 | 8 | 87 | 46 | 15 |
| Sunny days | 26 | 22 | 18 | 13 | 7 | 25 | 26 | 27 | 25 | 10 | 18 | 21 |
| Rainy days | 5 | 6 | 13 | 17 | 24 | 5 | 5 | 4 | 5 | 21 | 12 | 10 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Unión during the most sunny months:
The largest precipitation sum in Unión is at