| Month | Avg max | Avg min | Average | High | Date | Low | Date |
|---|---|---|---|---|---|---|---|
| Jan | 7.3 | 1.9 | 4.7 | 12.7 | 23 | -1.4 | 30 |
| Feb | 5.6 | -0.2 | 2.1 | 9.5 | 17 | -5.6 | 27 |
| Mar | 7.3 | 2.2 | 4.9 | 11.8 | 25 | -5.4 | 01 |
| Apr | 12.7 | 6.9 | 9.6 | 22.9 | 19 | 1.4 | 02 |
| May | 18.9 | 9.4 | 13.6 | 27.7 | 07 | 2.7 | 01 |
| Jun | 22.4 | 12.7 | 17.0 | 30.7 | 26 | 9.3 | 22 |
| Jul | 26.0 | 15.6 | 19.9 | 30.7 | 08 | 13.2 | 31 |
| Aug | 20.6 | 13.3 | 16.5 | 28.8 | 05 | 8.0 | 25 |
| Sep | 17.2 | 10.5 | 13.5 | 22.8 | 03 | 4.7 | 25 |
| Oct | 13.3 | 7.5 | 9.7 | 19.8 | 10 | -0.7 | 31 |
| Nov | 9.6 | 5.2 | 7.4 | 13.3 | 06 | -0.9 | 22 |
| Dec | 8.6 | 4.9 | 6.8 | 11.8 | 02 | -2.9 | 14 |
| 2018 | 14.3 | 7.7 | 10.9 | 30.7 | Jul | -5.6 | Feb |