| Jan | Feb | Maa | Apr | Mei | Jun | Jul | Aug | Sep | Okt | Nov | Dec | 2009 | |
| Gemiddelde temperatuur (°C) | 0.9 | 3.3 | 6.4 | 11.9 | 14.0 | 15.8 | 18.3 | 18.6 | 15.3 | 10.8 | 9.5 | 2.4 | 10.6 |
| Gemiddelde etmaalminimum (°C) | -1.8 | 1.2 | 3.2 | 6.9 | 9.4 | 11.4 | 14.5 | 13.8 | 11.3 | 7.5 | 7.2 | -0.0 | 7.1 |
| Gemiddelde etmaalmaximum (°C) | 4.3 | 5.8 | 10.2 | 17.7 | 19.0 | 20.9 | 22.8 | 24.3 | 20.1 | 14.7 | 12.1 | 4.6 | 14.8 |
| Laagste etmaalgemiddelde (°C) | -6.3 | -0.8 | 3.7 | 8.2 | 9.9 | 10.4 | 14.6 | 15.1 | 11.9 | 5.4 | 4.4 | -6.9 | -6.9 |
| Hoogste etmaalgemiddelde (°C) | 6.1 | 8.1 | 8.9 | 16.9 | 17.2 | 20.8 | 22.8 | 23.0 | 18.5 | 17.8 | 13.3 | 10.4 | 23.0 |
| Laagste etmaalminimum (°C) | -10.1 | -3.3 | -2.2 | 1.7 | 4.8 | 5.1 | 10.9 | 10.1 | 5.5 | 0.4 | 0.6 | -11.1 | -11.1 |
| Hoogste etmaalminimum (°C) | 4.4 | 7.0 | 7.1 | 12.1 | 12.9 | 16.8 | 19.6 | 19.1 | 16.2 | 13.9 | 11.7 | 9.0 | 19.6 |
| Laagste etmaalmaximum (°C) | -1.9 | 0.7 | 7.8 | 12.5 | 13.9 | 15.3 | 17.9 | 19.3 | 16.2 | 10.8 | 8.0 | -2.1 | -2.1 |
| Hoogste etmaalmaximum (°C) | 9.1 | 9.8 | 13.6 | 23.3 | 23.9 | 27.3 | 29.7 | 31.7 | 26.6 | 19.8 | 15.9 | 11.9 | 31.7 |
| ----------- | |||||||||||||
| Strenge vorstdagen, Tmin < -10.0 °C | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| Matige vorstdagen, Tmin < -5.0 °C | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 12 |
| Vorstdagen, Tmin < 0.0 °C | 18 | 11 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 47 |
| IJsdagen, Tmax < 0.0 °C | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 5 |
| Dagen Tmax < 5.0 °C | 17 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16 | 44 |
| Dagen Tmax >= 10.0 °C | 0 | 0 | 15 | 30 | 31 | 30 | 31 | 31 | 30 | 31 | 23 | 2 | 254 |
| Dagen Tmax >= 15.0 °C | 0 | 0 | 0 | 26 | 28 | 30 | 31 | 31 | 30 | 14 | 6 | 0 | 196 |
| Warme dagen, Tmax >= 20.0 °C | 0 | 0 | 0 | 4 | 12 | 14 | 26 | 28 | 18 | 0 | 0 | 0 | 102 |
| Zomerse dagen, Tmax >= 25.0 °C | 0 | 0 | 0 | 0 | 0 | 7 | 7 | 12 | 1 | 0 | 0 | 0 | 27 |
| Tropische dagen, Tmax >= 30.0 °C | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
| ----------- | |||||||||||||
| Neerslagsom (mm) | 38.3 | 55.0 | 48.6 | 30.8 | 48.0 | 64.6 | 81.0 | 43.6 | 21.0 | 58.4 | 115.2 | 91.7 | 696.2 |
| Hoogste etmaalsom (mm) | 16.6 | 21.4 | 12.2 | 9.6 | 21.0 | 19.6 | 13.0 | 11.2 | 6.4 | 13.6 | 11.6 | 16.0 | 21.4 |
| Dagen >= 0.1 mm | 11 | 21 | 16 | 9 | 12 | 12 | 18 | 9 | 12 | 16 | 28 | 21 | 185 |
| Dagen >= 1.0 mm | 6 | 12 | 10 | 6 | 6 | 7 | 15 | 7 | 6 | 11 | 21 | 13 | 120 |
| Dagen >= 10.0 mm | 1 | 1 | 1 | 0 | 2 | 3 | 1 | 1 | 0 | 2 | 4 | 3 | 19 |
| Dagen >= 25.0 mm | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ----------- | |||||||||||||
| Gemiddelde luchtdruk (hPa) | 1013.5 | 1013.9 | 1013.9 | 1013.7 | 1018.4 | 1016.4 | 1012.3 | 1016.2 | 1020.4 | 1016.3 | 1004.0 | 1006.3 | 1013.8 |
| Gemiddelde windsnelheid (km/h) | 0.0 | 3.1 | 7.3 | 4.2 | 5.3 | 2.1 | 3.3 | 2.4 | 2.5 | 3.4 | 10.0 | 7.2 | 4.6 |