| Month | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Average |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temperature (°C) | −4.1 | −1.0 | 5.0 | 11.7 | 17.6 | 22.2 | 24.9 | 25.0 | 19.8 | 12.7 | 5.3 | −2.0 | 11.4 |
| Precipitation (mm) | 18.6 | 27.6 | 33.5 | 71.5 | 99.4 | 122.9 | 398.2 | 319.9 | 128.1 | 49.3 | 48.3 | 24.2 | 1,341.5 |
| Relative humidity (%) | 68.0 | 63.2 | 60.6 | 58.8 | 65.0 | 70.6 | 80.0 | 80.5 | 78.2 | 76.1 | 73.3 | 71.5 | 70.5 |