| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 20.5 | 26.8 | 37.2 | 51.4 | 65.7 | 73.2 | 77.2 | 75.0 | 65.8 | 53.8 | 37.3 | 24.6 | 50.7 |
| Highest Mean Max. Temperature (F) | 31.0 | 37.0 | 45.7 | 59.8 | 76.9 | 80.1 | 82.4 | 80.0 | 74.2 | 60.6 | 47.4 | 32.1 | 82.4 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1988 | 1983 | 1998 | 1971 | 1999 | 1994 | 1988 |
| Lowest Mean Max. Temperature (F) | 11.3 | 18.5 | 30.0 | 45.0 | 57.5 | 68.0 | 70.5 | 70.4 | 60.5 | 47.8 | 28.8 | 14.4 | 11.3 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1997 | 1982 | 1992 | 1994 | 1974 | 1987 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 9.4 | 14.2 | 24.7 | 38.5 | 52.1 | 60.8 | 65.2 | 63.4 | 54.5 | 43.3 | 28.9 | 15.3 | 39.2 |
| Highest Mean Temperature (F) | 19.6 | 27.9 | 34.1 | 44.7 | 61.5 | 66.5 | 69.7 | 68.2 | 60.3 | 51.3 | 36.7 | 24.1 | 69.7 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1986 | 1977 | 1995 | 1983 | 1995 | 1998 | 1971 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -1.3 | 4.3 | 17.4 | 32.5 | 45.3 | 54.3 | 58.4 | 58.8 | 49.1 | 37.9 | 20.1 | 4.6 | -1.3 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1997 | 1982 | 1992 | 1977 | 1974 | 1987 | 1995 | 1989 | 1977 |
| Mean Min. Temperature (F) | -1.7 | 1.6 | 12.2 | 25.6 | 38.5 | 48.3 | 53.2 | 51.8 | 43.2 | 32.8 | 20.4 | 6.0 | 27.7 |
| Highest Mean Min. Temperature (F) | 8.6 | 18.8 | 24.3 | 32.6 | 46.1 | 53.5 | 57.4 | 58.2 | 48.0 | 41.9 | 26.4 | 17.1 | 58.2 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1986 | 1977 | 1991 | 1999 | 1995 | 1978 | 1971 | 1998 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -13.9 | -10.1 | 4.5 | 19.8 | 32.6 | 40.6 | 46.3 | 45.8 | 37.7 | 26.5 | 11.4 | -6.7 | -13.9 |
| Year Lowest Occurred | 1977 | 1974 | 1984 | 1982 | 1983 | 1982 | 1992 | 1992 | 1976 | 1976 | 1995 | 1989 | 1977 |
| Mean Precipitation (in.) | 1.17 | 0.86 | 1.76 | 2.30 | 3.27 | 3.88 | 3.86 | 4.54 | 4.24 | 2.71 | 2.19 | 1.31 | 32.09 |
| Highest Precipitation (in.) | 3.11 | 2.62 | 3.75 | 4.48 | 6.98 | 13.62 | 7.79 | 10.74 | 8.03 | 5.92 | 5.63 | 2.88 | 13.62 |
| Year Highest Occurred | 1996 | 1971 | 1991 | 1982 | 1973 | 1981 | 1999 | 1972 | 1980 | 1995 | 1991 | 1982 | 1981 |
| Lowest Precipitation (in.) | 0.21 | 0.03 | 0.27 | 0.60 | 0.27 | 1.63 | 1.03 | 1.61 | 0.53 | 0.59 | 0.45 | 0.32 | 0.03 |
| Year Lowest Occurred | 1981 | 1993 | 1978 | 1971 | 1986 | 1988 | 1989 | 1987 | 1976 | 1976 | 1981 | 1994 | 1993 |
| Heating Degree Days (F) | 1726. | 1423. | 1250. | 795. | 418. | 164. | 78. | 112. | 319. | 674. | 1085. | 1541. | 9585. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 18. | 36. | 83. | 63. | 4. | 0. | 0. | 0. | 204. |