| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | |
| Monthly Max. Temp. | 9.3 | 10.2 | 13.5 | 18.9 | 22.7 | 25.2 | 28.9 | 30.6 | 26.3 | 20.8 | 15.7 | 11.5 | 19.5 |
| Monthly Min. Temp. | -0.2 | 0.5 | 3.8 | 9.3 | 14.3 | 18.3 | 22.2 | 23.6 | 20.0 | 13.8 | 7.7 | 2.3 | 11.3 |
| Monthly Ave, Temp. | 4.5 | 5.4 | 8.6 | 14.1 | 18.5 | 21.7 | 25.5 | 27.1 | 23.1 | 17.3 | 11.7 | 6.9 | 15.4 |
| Monthly Precipitation | 57.9 | 64.3 | 118.9 | 126.4 | 139.7 | 174.5 | 164.6 | 187.6 | 239.8 | 187.4 | 87.0 | 55.6 | 1601.8 |
| Cherry Blossom | Earliest Frost | Latest Frost | Earliest Ice | Latest Ice |
| March 28 | November 27 | March 9 | December 12 | March 8 |
