Average annual temperature is 19.9 °C
Absolute maximum temperature: 37.9 °C
Absolute minimum temperature: -0.8 °C
Number of sunny days: 165 days
Number of rainy days: 200 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) | 24.1 | 27.5 | 28.7 | 31.5 | 33.7 | 36.0 | 37.1 | 37.9 | 35.1 | 30.6 | 26.8 | 23.4 |
| Average daytime temperature (°C) | 18.0 | 21.0 | 22.9 | 26.5 | 28.6 | 31.3 | 33.7 | 35.3 | 30.9 | 25.3 | 19.4 | 15.9 |
| Average temperature (°C) | 12.5 | 15.4 | 16.9 | 19.8 | 22.5 | 25.3 | 27.7 | 29.0 | 24.9 | 19.5 | 14.1 | 11.0 |
| Average night temperature (°C) | 8.3 | 11.1 | 12.0 | 14.5 | 17.4 | 20.6 | 23.2 | 24.1 | 20.0 | 14.6 | 9.9 | 6.9 |
| Absolute minimum temperature (°C) | -0.7 | 0.7 | -0.8 | 8.9 | 10.9 | 18.2 | 20.4 | 21.6 | 16.1 | 8.6 | 0.8 | -0.8 |
| 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) | 10.4 | 11.1 | 12.0 | 13.0 | 13.8 | 14.2 | 14.0 | 13.3 | 12.4 | 11.4 | 10.6 | 10.1 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 6.6 | 7.3 | 8.5 | 9.1 | 10.6 | 10.6 | 11.5 | 10.9 | 10.1 | 9.1 | 6.7 | 6.3 |
| Precipitation (mm) | 116 | 81 | 106 | 73 | 87 | 159 | 117 | 71 | 62 | 79 | 78 | 166 |
| Sunny days | 14 | 10 | 15 | 14 | 11 | 7 | 7 | 9 | 15 | 25 | 19 | 19 |
| Rainy days | 17 | 18 | 16 | 16 | 20 | 23 | 24 | 22 | 15 | 6 | 11 | 12 |
| 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