| Month | Precipitation totals | Monthly means of daily temperature extremes | ||||
| Highs | Lows | Averages | ||||
|
| (mm) | ------------------------------(˚C)------------------------------ | ||||
| January | 173.2 | 7.7 | 0.8 | 4.2 | ||
| January | 173.2 | 7.7 | 0.8 | 4.2 | ||
| February | 127.9 | 10.4 | 1.7 | 6.0 | ||
| March | 118.3 | 12.8 | 2.8 | 7.8 | ||
| April | 67.7 | 15.7 | 4.2 | 9.9 | ||
| May | 54.4 | 19.4 | 6.6 | 13.0 | ||
| June | 34.1 | 22.8 | 9.2 | 16.0 | ||
| July | 10.3 | 27.3 | 10.8 | 19.1 | ||
| August | 15.9 | 27.6 | 10.7 | 19.1 | ||
| September | 36.2 | 24.7 | 8.9 | 16.8 | ||
| October | 84.1 | 18.0 | 5.5 | 11.8 | ||
| November | 164.9 | 11.4 | 3.2 | 7.3 | ||
| December | 191.3 | 7.9 | 1.2 | 4.6 | ||
| Annual precipitation total and temperature means over 66 yr 8 mo | 1078.1 | 17.2 | 5.5 | 11.3 | ||