| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Average High Temperature (°C) | 5.9 | 5.8 | 9.6 | 15.6 | 20.3 | 23.6 | 27.5 | 29.6 | 25.7 | 20.4 | 14.8 | 9.5 |
| Average Low Temperature (°C) | 0.9 | 0.5 | 2.9 | 7.9 | 12.9 | 17.6 | 21.5 | 22.9 | 19.1 | 13.3 | 8 | 3.6 |
| Average Precipitation (mm) | 261.9 | 171.8 | 160.5 | 141.2 | 163 | 199.8 | 262.8 | 174.6 | 258.7 | 221 | 295.5 | 277.9 |
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