| Month | Avg max | Avg min | Average | High | Date | Low | Date |
|---|---|---|---|---|---|---|---|
| Jan | 6.0 | 1.3 | 3.7 | 12.4 | 29 | -5.9 | 25 |
| Feb | 5.7 | 0.4 | 2.8 | 9.7 | 19 | -2.0 | 19 |
| Mar | 6.7 | -0.5 | 2.8 | 15.2 | 05 | -4.7 | 31 |
| Apr | 13.0 | 3.0 | 7.5 | 18.9 | 23 | -4.0 | 07 |
| May | 17.3 | 6.1 | 11.0 | 25.4 | 31 | 0.9 | 16 |
| Jun | 21.1 | 10.1 | 14.8 | 28.7 | 19 | 5.9 | 25 |
| Jul | 28.0 | 13.8 | 20.2 | 33.8 | 22 | 10.4 | 06 |
| Aug | 23.6 | 12.6 | 17.4 | 31.9 | 01 | 9.3 | 08 |
| Sep | 20.0 | 9.9 | 14.1 | 31.2 | 04 | 5.0 | 07 |
| Oct | 15.3 | 9.1 | 12.1 | 19.7 | 07 | 2.7 | 30 |
| Nov | 9.0 | 3.3 | 6.3 | 14.1 | 01 | -0.6 | 20 |
| Dec | 9.0 | 2.7 | 6.1 | 12.8 | 16 | 0.2 | 04 |
| 2013 | 14.6 | 6.0 | 9.9 | 33.8 | Jul | -5.9 | Jan |