| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Average High Temperature (°C) | 8.8 | 9.2 | 12.4 | 18.5 | 22.9 | 25.1 | 28.9 | 30.5 | 25.4 | 20.3 | 15.5 | 11.3 |
| Average Low Temperature (°C) | -4.8 | -3.9 | -0.3 | 5.6 | 10.6 | 15.9 | 19.7 | 20.9 | 17 | 9.9 | 3 | -2.7 |
| Average Precipitation (mm) | 30.3 | 40.3 | 65.9 | 88.9 | 87.9 | 132.3 | 157.5 | 227.2 | 242.1 | 124.4 | 57.2 | 19 |
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