| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Average High Temperature (°C) | 5.5 | 5.4 | 9.3 | 15.9 | 20.7 | 24 | 27.7 | 29.5 | 25.2 | 19.8 | 14.4 | 9.1 |
| Average Low Temperature (°C) | -0.1 | -0.5 | 1.9 | 7.1 | 11.9 | 16.8 | 20.7 | 22 | 18.1 | 12 | 6.7 | 2.5 |
| Average Precipitation (mm) | 251.3 | 166.1 | 158.4 | 145.5 | 169.2 | 197 | 265.8 | 182.5 | 254.4 | 195.3 | 256.2 | 250.6 |
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