| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 24.9 | 31.1 | 42.5 | 57.0 | 69.5 | 78.4 | 82.1 | 79.4 | 71.0 | 59.9 | 43.1 | 29.8 | 55.7 |
| Highest Mean Max. Temperature (F) | 37.4 | 40.6 | 51.9 | 66.0 | 77.7 | 84.9 | 87.7 | 85.6 | 78.5 | 66.8 | 54.7 | 39.1 | 87.7 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1988 | 1998 | 1971 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 13.8 | 23.0 | 35.7 | 49.1 | 62.3 | 71.9 | 75.0 | 74.7 | 64.0 | 53.9 | 34.7 | 19.2 | 13.8 |
| Year Lowest Occurred | 1977 | 1978 | 1975 | 1975 | 1983 | 1982 | 1992 | 1997 | 1993 | 1976 | 1995 | 2000 | 1977 |
| Mean Temperature (F) | 14.4 | 20.0 | 31.7 | 45.2 | 57.0 | 66.1 | 70.4 | 67.8 | 59.1 | 47.9 | 33.6 | 20.5 | 44.5 |
| Highest Mean Temperature (F) | 28.3 | 31.9 | 40.6 | 51.6 | 62.0 | 70.7 | 74.6 | 73.8 | 65.3 | 55.3 | 42.2 | 29.5 | 74.6 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1985 | 1998 | 1984 | 1999 | 1995 | 1998 | 1971 | 1999 | 1998 | 1999 |
| Lowest Mean Temperature (F) | -0.5 | 7.1 | 23.4 | 37.7 | 50.5 | 59.8 | 65.2 | 62.3 | 53.0 | 40.1 | 23.5 | 7.8 | -0.5 |
| Year Lowest Occurred | 1977 | 1978 | 1975 | 1975 | 1983 | 1982 | 1992 | 1977 | 1974 | 1976 | 1976 | 1983 | 1977 |
| Mean Min. Temperature (F) | 3.8 | 8.8 | 20.9 | 33.4 | 44.4 | 53.8 | 58.7 | 56.1 | 47.2 | 35.8 | 24.0 | 11.2 | 33.2 |
| Highest Mean Min. Temperature (F) | 19.2 | 23.2 | 29.2 | 39.8 | 51.7 | 58.4 | 64.8 | 64.0 | 53.2 | 43.7 | 31.7 | 21.6 | 64.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1985 | 1991 | 1991 | 1999 | 1995 | 1994 | 1971 | 1998 | 1987 | 1999 |
| Lowest Mean Min. Temperature (F) | -14.8 | -8.9 | 9.9 | 26.2 | 38.3 | 47.6 | 53.0 | 48.5 | 38.0 | 26.3 | 10.1 | -5.2 | -14.8 |
| Year Lowest Occurred | 1977 | 1978 | 1978 | 1975 | 1971 | 1982 | 1971 | 1976 | 1976 | 1976 | 1976 | 1976 | 1977 |
| Mean Precipitation (in.) | 1.15 | 0.94 | 2.03 | 3.45 | 3.57 | 3.99 | 3.98 | 4.32 | 3.95 | 2.30 | 2.34 | 1.26 | 33.28 |
| Highest Precipitation (in.) | 3.10 | 3.38 | 4.87 | 8.23 | 8.29 | 9.33 | 8.42 | 10.58 | 10.60 | 6.31 | 5.51 | 2.37 | 10.60 |
| Year Highest Occurred | 1996 | 1971 | 1998 | 1981 | 1973 | 1998 | 1999 | 1980 | 1992 | 1984 | 1982 | 1990 | 1992 |
| Lowest Precipitation (in.) | 0.13 | 0.00 | 0.24 | 0.60 | 0.62 | 1.05 | 1.28 | 1.22 | 0.74 | 0.46 | 0.03 | 0.19 | 0.00 |
| Year Lowest Occurred | 1981 | 1995 | 1978 | 1997 | 1981 | 1992 | 1973 | 1976 | 1979 | 1975 | 1976 | 1989 | 1995 |
| Heating Degree Days (F) | 1571. | 1262. | 1032. | 594. | 279. | 75. | 17. | 53. | 209. | 533. | 944. | 1380. | 7949. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 30. | 107. | 185. | 138. | 31. | 1. | 0. | 0. | 493. |