Average annual temperature is 9.8 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: -13.5 °C
Number of sunny days: 168 days
Number of rainy days: 155 days
Number of snow days: 42 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) | 10.8 | 10.2 | 10.6 | 27.5 | 28.5 | 30.4 | 34.6 | 36.9 | 29.9 | 25.7 | 14.2 | 10.9 |
| Average daytime temperature (°C) | 4.0 | 5.0 | 5.0 | 12.9 | 21.7 | 23.6 | 30.8 | 28.9 | 23.1 | 16.6 | 8.9 | 5.1 |
| Average temperature (°C) | 0.6 | 0.2 | 0.6 | 6.4 | 14.7 | 17.0 | 23.1 | 21.5 | 15.6 | 10.7 | 4.7 | 2.1 |
| Average night temperature (°C) | -1.8 | -2.9 | -3.4 | 1.7 | 8.7 | 11.2 | 15.4 | 15.3 | 9.9 | 6.5 | 1.9 | -0.3 |
| Absolute minimum temperature (°C) | -12.9 | -13.5 | -9.4 | -7.6 | 4.4 | 2.9 | 10.7 | 10.1 | 3.5 | -4.7 | -5.4 | -5.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.2 | 10.4 | 11.9 | 13.5 | 14.9 | 15.6 | 15.2 | 14.1 | 12.5 | 11.0 | 9.6 | 8.8 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 4.4 | 5.6 | 6.9 | 8.6 | 12.1 | 12.3 | 13.9 | 11.0 | 9.4 | 7.9 | 6.1 | 4.4 |
| Precipitation (mm) | 52 | 35 | 112 | 109 | 41 | 36 | 0 | 100 | 60 | 69 | 98 | 106 |
| Sunny days | 11 | 9 | 7 | 8 | 14 | 17 | 29 | 17 | 16 | 19 | 13 | 8 |
| Rainy days | 14 | 7 | 13 | 15 | 17 | 13 | 2 | 14 | 14 | 12 | 16 | 18 |
| Snow days | 6 | 12 | 11 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 5 |
The best time to visit Union during the most sunny months:
Months with the longest average daylight duration in Union:
The largest precipitation sum in Union is at