Average annual temperature is 12.2 °C
Absolute maximum temperature: 33.4 °C
Absolute minimum temperature: -10.1 °C
Number of sunny days: 165 days
Number of rainy days: 190 days
Number of snow days: 10 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) | 18.4 | 21.7 | 23.7 | 27.0 | 26.9 | 29.2 | 33.4 | 32.1 | 32.8 | 27.8 | 23.1 | 16.9 |
| Average daytime temperature (°C) | 9.2 | 12.4 | 12.5 | 19.3 | 21.1 | 24.3 | 29.3 | 27.7 | 24.9 | 19.6 | 13.1 | 9.5 |
| Average temperature (°C) | 3.8 | 6.2 | 6.2 | 12.0 | 14.9 | 18.1 | 22.8 | 21.4 | 18.2 | 12.9 | 5.8 | 3.7 |
| Average night temperature (°C) | 0.6 | 1.7 | 1.4 | 5.7 | 9.5 | 12.8 | 17.4 | 16.5 | 13.0 | 7.6 | 0.6 | -0.2 |
| Absolute minimum temperature (°C) | -8.2 | -10.1 | -9.6 | -2.9 | 2.0 | 7.9 | 13.4 | 10.8 | 8.4 | 0.8 | -7.6 | -5.7 |
| 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 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.4 | 6.7 | 7.4 | 9.8 | 10.5 | 10.8 | 12.2 | 10.6 | 9.5 | 8.3 | 7.5 | 5.6 |
| Precipitation (mm) | 71 | 116 | 63 | 102 | 109 | 100 | 87 | 77 | 51 | 26 | 38 | 79 |
| Sunny days | 9 | 11 | 15 | 16 | 12 | 12 | 8 | 10 | 16 | 20 | 20 | 16 |
| Rainy days | 19 | 16 | 15 | 14 | 19 | 18 | 23 | 21 | 14 | 11 | 8 | 12 |
| Snow days | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 |
The best time to visit Union during the most sunny months:
The largest precipitation sum in Union is at