| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Average High Temperature (°C) | 4.4 | 4.7 | 7.9 | 13.8 | 18.5 | 21.2 | 24.8 | 26.9 | 23.3 | 18.4 | 12.8 | 7.4 |
| Average Low Temperature (°C) | -2.9 | -2.8 | -0.7 | 4.2 | 9 | 13.8 | 17.9 | 19.8 | 15.7 | 9.3 | 3.6 | -0.4 |
| Average Precipitation (mm) | 43.5 | 58.2 | 91.8 | 138 | 149.8 | 171.5 | 170.3 | 198.6 | 218.7 | 142.3 | 104.5 | 36.9 |
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