Average annual temperature is 16.5 °C
Absolute maximum temperature: 37.1 °C
Absolute minimum temperature: -5.5 °C
Number of sunny days: 180 days
Number of rainy days: 185 days
Look at detailed online map of Union
* Weather data for Union United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 19.8 | 25.1 | 25.4 | 28.4 | 30.3 | 33.0 | 35.9 | 37.1 | 33.3 | 30.4 | 25.4 | 18.9 |
| Average daytime temperature (°C) | 13.0 | 16.3 | 17.7 | 21.5 | 26.0 | 29.3 | 32.5 | 31.6 | 29.6 | 23.2 | 17.4 | 13.2 |
| Average temperature (°C) | 8.4 | 10.7 | 11.4 | 15.3 | 19.3 | 22.5 | 25.7 | 25.3 | 22.7 | 17.0 | 11.0 | 7.7 |
| Average night temperature (°C) | 4.8 | 6.5 | 6.3 | 10.1 | 13.7 | 16.8 | 20.5 | 20.6 | 17.0 | 11.8 | 6.0 | 3.4 |
| Absolute minimum temperature (°C) | -4.5 | -5.4 | -5.5 | 3.5 | 5.0 | 12.4 | 15.8 | 16.7 | 12.9 | 5.0 | -4.5 | -4.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.2 | 13.4 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.4 | 5.9 | 8.5 | 8.9 | 10.7 | 11.1 | 11.4 | 10.3 | 10.7 | 8.5 | 7.3 | 6.6 |
| Precipitation (mm) | 145 | 137 | 120 | 143 | 71 | 167 | 80 | 121 | 16 | 10 | 50 | 75 |
| Sunny days | 12 | 11 | 18 | 16 | 12 | 13 | 7 | 11 | 20 | 21 | 21 | 18 |
| Rainy days | 19 | 17 | 13 | 14 | 19 | 17 | 24 | 20 | 10 | 10 | 9 | 13 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Union during the most sunny months:
The largest precipitation sum in Union is at