| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Average High Temperature (°C) | 3.6 | 4.3 | 8.8 | 16 | 21 | 24 | 27.5 | 28.9 | 23.9 | 18 | 12.3 | 6.7 |
| Average Low Temperature (°C) | -6.1 | -6 | -2 | 4 | 9.2 | 14.7 | 18.6 | 19.6 | 15.3 | 8.1 | 1.9 | -3.3 |
| Average Precipitation (mm) | 39.7 | 52 | 85.6 | 104.2 | 107.4 | 179.3 | 198.7 | 129.6 | 203.8 | 106.1 | 70.4 | 33.8 |
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