Average annual temperature is 17.5 °C
Absolute maximum temperature: 35.7 °C
Absolute minimum temperature: -4.5 °C
Number of sunny days: 170 days
Number of rainy days: 195 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) | 20.5 | 24.6 | 25.5 | 28.5 | 31.3 | 34.8 | 35.3 | 35.7 | 32.5 | 28.3 | 24.9 | 20.2 |
| Average daytime temperature (°C) | 14.9 | 17.9 | 19.3 | 22.5 | 25.5 | 29.6 | 31.9 | 31.9 | 29.0 | 22.9 | 17.2 | 13.7 |
| Average temperature (°C) | 10.0 | 12.5 | 13.4 | 16.4 | 19.8 | 23.6 | 26.1 | 26.1 | 23.1 | 17.5 | 11.9 | 8.8 |
| Average night temperature (°C) | 6.5 | 8.7 | 8.4 | 11.6 | 15.4 | 18.9 | 21.9 | 21.7 | 18.5 | 13.2 | 7.9 | 5.0 |
| Absolute minimum temperature (°C) | -2.9 | -3.6 | -4.5 | 6.0 | 8.6 | 16.5 | 19.6 | 18.2 | 14.8 | 6.5 | -1.0 | -2.4 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.4 | 12.4 | 11.3 | 10.4 | 10.0 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 5.7 | 6.3 | 8.8 | 9.5 | 10.2 | 11.6 | 11.3 | 10.7 | 10.6 | 8.7 | 6.7 | 6.6 |
| Precipitation (mm) | 146 | 159 | 177 | 137 | 84 | 118 | 141 | 92 | 48 | 36 | 55 | 57 |
| Sunny days | 13 | 10 | 18 | 14 | 8 | 10 | 8 | 12 | 15 | 21 | 19 | 22 |
| Rainy days | 18 | 18 | 13 | 16 | 23 | 20 | 23 | 19 | 15 | 10 | 11 | 9 |
| 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