Average annual temperature is 14.5 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: -9.8 °C
Number of sunny days: 199 days
Number of rainy days: 164 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) | 17.7 | 22.1 | 23.4 | 27.4 | 30.4 | 34.1 | 35.4 | 36.5 | 32.1 | 29.7 | 25.1 | 17.7 |
| Average daytime temperature (°C) | 8.5 | 11.9 | 13.6 | 20.0 | 24.9 | 29.0 | 31.1 | 29.5 | 27.6 | 20.8 | 14.2 | 10.1 |
| Average temperature (°C) | 4.4 | 6.0 | 7.4 | 13.2 | 18.9 | 22.9 | 25.7 | 24.2 | 21.6 | 15.4 | 8.5 | 5.4 |
| Average night temperature (°C) | 1.2 | 1.7 | 2.8 | 7.7 | 13.1 | 17.4 | 20.8 | 19.7 | 16.5 | 11.0 | 4.2 | 2.2 |
| Absolute minimum temperature (°C) | -7.9 | -9.8 | -6.4 | -0.5 | 4.8 | 12.7 | 16.7 | 14.2 | 12.4 | -2.5 | -5.7 | -6.9 |
| 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 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 4.7 | 7.6 | 7.4 | 9.8 | 11.1 | 11.8 | 12.1 | 11.1 | 10.6 | 7.7 | 7.9 | 5.6 |
| Precipitation (mm) | 146 | 53 | 198 | 78 | 60 | 51 | 66 | 131 | 41 | 48 | 21 | 70 |
| Sunny days | 13 | 18 | 15 | 18 | 18 | 15 | 11 | 13 | 18 | 20 | 23 | 17 |
| Rainy days | 17 | 10 | 15 | 12 | 13 | 15 | 20 | 18 | 12 | 11 | 7 | 14 |
| Snow days | 1 | 0 | 1 | 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