| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 21.4 | 27.7 | 38.3 | 52.6 | 66.8 | 74.4 | 78.6 | 76.2 | 66.9 | 54.6 | 37.9 | 25.3 | 51.7 |
| Highest Mean Max. Temperature (F) | 32.0 | 38.2 | 48.3 | 63.5 | 77.4 | 81.1 | 83.9 | 80.8 | 76.4 | 60.7 | 48.8 | 34.0 | 83.9 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1976 | 1983 | 1998 | 1975 | 1999 | 1998 | 1976 |
| Lowest Mean Max. Temperature (F) | 11.8 | 19.4 | 30.9 | 45.7 | 58.0 | 69.7 | 72.2 | 71.6 | 61.1 | 47.9 | 29.1 | 14.5 | 11.8 |
| Year Lowest Occurred | 1994 | 1989 | 1996 | 1995 | 1973 | 1982 | 1992 | 1977 | 1974 | 1988 | 1995 | 1983 | 1994 |
| Mean Temperature (F) | 10.6 | 16.1 | 27.1 | 40.9 | 54.0 | 62.5 | 67.2 | 65.1 | 55.9 | 44.4 | 29.8 | 16.3 | 40.8 |
| Highest Mean Temperature (F) | 21.8 | 30.0 | 37.2 | 47.4 | 62.8 | 68.0 | 72.0 | 69.5 | 63.3 | 51.6 | 38.8 | 25.1 | 72.0 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1999 | 1995 | 1998 | 1971 | 1999 | 1997 | 1999 |
| Lowest Mean Temperature (F) | 1.4 | 7.3 | 19.9 | 33.9 | 47.7 | 57.0 | 61.7 | 60.1 | 49.0 | 38.2 | 20.9 | 3.7 | 1.4 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1975 | 1973 | 1982 | 1992 | 1977 | 1974 | 1987 | 1995 | 1983 | 1982 |
| Mean Min. Temperature (F) | -0.2 | 4.4 | 15.8 | 29.1 | 41.2 | 50.6 | 55.7 | 53.9 | 44.9 | 34.1 | 21.6 | 7.2 | 29.9 |
| Highest Mean Min. Temperature (F) | 11.6 | 21.8 | 26.1 | 34.7 | 48.2 | 55.7 | 61.2 | 60.4 | 50.2 | 42.8 | 28.8 | 18.5 | 61.2 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1986 | 1977 | 1991 | 1999 | 1995 | 1998 | 1971 | 1999 | 1997 | 1999 |
| Lowest Mean Min. Temperature (F) | -12.3 | -6.2 | 7.3 | 21.8 | 36.1 | 44.2 | 51.1 | 48.6 | 36.8 | 27.4 | 12.7 | -7.1 | -12.3 |
| Year Lowest Occurred | 1982 | 1974 | 1984 | 1975 | 1974 | 1982 | 1992 | 1977 | 1974 | 1987 | 1995 | 1983 | 1982 |
| Mean Precipitation (in.) | 1.24 | 0.87 | 1.60 | 2.38 | 3.36 | 3.93 | 4.04 | 4.35 | 4.11 | 2.65 | 2.05 | 1.32 | 31.90 |
| Highest Precipitation (in.) | 3.15 | 2.82 | 4.09 | 4.33 | 7.50 | 10.22 | 10.24 | 9.15 | 8.51 | 5.90 | 4.87 | 3.46 | 10.24 |
| Year Highest Occurred | 1997 | 1971 | 1973 | 1991 | 1991 | 1981 | 2000 | 1978 | 1994 | 1979 | 1991 | 1987 | 2000 |
| Lowest Precipitation (in.) | 0.14 | 0.04 | 0.15 | 0.65 | 0.56 | 0.85 | 0.63 | 0.82 | 0.40 | 0.43 | 0.27 | 0.35 | 0.04 |
| Year Lowest Occurred | 1985 | 1993 | 1978 | 1971 | 1986 | 1995 | 1989 | 1981 | 1976 | 1976 | 1981 | 1994 | 1993 |
| Heating Degree Days (F) | 1688. | 1371. | 1176. | 725. | 367. | 128. | 50. | 83. | 283. | 640. | 1057. | 1512. | 9080. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 25. | 52. | 117. | 83. | 11. | 0. | 0. | 0. | 288. |