Average annual temperature is 9.8 °C
Absolute maximum temperature: 28.9 °C
Absolute minimum temperature: -14.7 °C
Number of sunny days: 128 days
Number of rainy days: 217 days
Number of snow days: 20 days
Look at detailed online map of May
* Weather data for May 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) | 15.8 | 17.9 | 18.6 | 24.5 | 24.0 | 26.3 | 28.9 | 27.1 | 28.2 | 24.6 | 19.5 | 13.2 |
| Average daytime temperature (°C) | 5.6 | 9.0 | 8.9 | 16.3 | 17.7 | 20.7 | 24.8 | 23.8 | 21.0 | 15.8 | 9.9 | 6.8 |
| Average temperature (°C) | 1.3 | 3.4 | 3.0 | 9.9 | 12.2 | 15.8 | 19.9 | 18.9 | 15.7 | 10.7 | 4.0 | 2.4 |
| Average night temperature (°C) | -1.9 | -1.1 | -1.5 | 4.8 | 7.4 | 11.6 | 15.8 | 14.9 | 11.4 | 6.9 | -0.3 | -0.8 |
| Absolute minimum temperature (°C) | -10.4 | -14.7 | -13.3 | -3.9 | -3.5 | 6.0 | 12.2 | 9.4 | 6.6 | -1.1 | -10.6 | -10.2 |
| 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 | 14.6 | 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) | 3.2 | 6.2 | 6.8 | 9.0 | 9.2 | 9.9 | 11.7 | 10.1 | 9.0 | 7.0 | 6.7 | 4.4 |
| Precipitation (mm) | 110 | 102 | 100 | 89 | 111 | 102 | 84 | 69 | 82 | 77 | 73 | 106 |
| Sunny days | 4 | 10 | 10 | 15 | 12 | 9 | 4 | 9 | 11 | 15 | 19 | 10 |
| Rainy days | 22 | 15 | 15 | 15 | 19 | 21 | 27 | 22 | 19 | 16 | 9 | 17 |
| Snow days | 5 | 3 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
The best time to visit May during the most sunny months: