Average annual temperature is 12.9 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: -7.8 °C
Number of sunny days: 157 days
Number of rainy days: 206 days
Number of snow days: 2 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) | 17.6 | 21.2 | 22.5 | 22.5 | 24.9 | 27.9 | 30.4 | 32.7 | 29.3 | 23.5 | 22.7 | 15.7 |
| Average daytime temperature (°C) | 10.3 | 12.9 | 13.9 | 17.2 | 19.7 | 23.4 | 27.6 | 27.1 | 23.5 | 18.4 | 13.0 | 9.9 |
| Average temperature (°C) | 5.3 | 8.4 | 8.4 | 11.9 | 14.7 | 18.2 | 21.9 | 21.6 | 18.0 | 13.2 | 7.9 | 5.0 |
| Average night temperature (°C) | 1.9 | 4.8 | 4.0 | 7.6 | 10.9 | 14.0 | 17.1 | 17.4 | 13.7 | 9.0 | 4.0 | 1.2 |
| Absolute minimum temperature (°C) | -5.9 | -4.8 | -7.8 | 1.6 | 4.1 | 9.7 | 13.7 | 13.0 | 9.8 | 3.5 | -5.1 | -6.5 |
| 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 | 14.3 | 13.5 | 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) | 6.1 | 6.0 | 8.5 | 8.9 | 10.0 | 10.7 | 11.8 | 10.5 | 10.8 | 9.5 | 7.2 | 6.4 |
| Precipitation (mm) | 228 | 161 | 139 | 159 | 112 | 121 | 115 | 144 | 53 | 18 | 56 | 186 |
| Sunny days | 13 | 9 | 17 | 12 | 9 | 11 | 4 | 10 | 15 | 19 | 20 | 18 |
| Rainy days | 16 | 19 | 14 | 18 | 22 | 19 | 27 | 21 | 15 | 12 | 10 | 13 |
| Snow days | 2 | 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