| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Average High Temperature (°C) | 4.6 | 5 | 8.5 | 15.4 | 20.3 | 22.9 | 26.5 | 28.1 | 23.4 | 18.2 | 12.7 | 7.7 |
| Average Low Temperature (°C) | -4 | -3.7 | -1 | 4.3 | 9.5 | 14.5 | 18.5 | 19.7 | 15.6 | 8.7 | 2.7 | -1.8 |
| Average Precipitation (mm) | 30.6 | 41.4 | 71.1 | 100.5 | 120 | 167.6 | 186.8 | 228.2 | 215.9 | 111.9 | 65 | 25 |
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