| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 23.9 | 28.9 | 39.1 | 53.6 | 67.9 | 76.1 | 79.9 | 77.6 | 68.6 | 56.6 | 40.5 | 28.1 | 53.4 |
| Highest Mean Max. Temperature (F) | 33.2 | 39.1 | 48.1 | 61.0 | 78.2 | 81.8 | 85.3 | 83.8 | 75.6 | 66.1 | 49.9 | 35.4 | 85.3 |
| Year Highest Occurred | 1990 | 1984 | 2000 | 1987 | 1977 | 1988 | 1983 | 1983 | 1998 | 1973 | 1999 | 1979 | 1983 |
| Lowest Mean Max. Temperature (F) | 14.1 | 19.9 | 31.2 | 46.6 | 58.1 | 71.2 | 72.1 | 70.9 | 62.4 | 49.8 | 31.2 | 17.3 | 14.1 |
| Year Lowest Occurred | 1994 | 1979 | 1996 | 1995 | 1997 | 1993 | 1992 | 1986 | 1993 | 1987 | 1995 | 1989 | 1994 |
| Mean Temperature (F) | 12.0 | 16.8 | 27.6 | 40.9 | 53.7 | 62.6 | 66.9 | 65.2 | 56.0 | 44.5 | 30.8 | 18.1 | 41.3 |
| Highest Mean Temperature (F) | 21.4 | 28.9 | 35.9 | 46.3 | 62.1 | 67.2 | 71.4 | 69.8 | 61.6 | 52.2 | 37.3 | 26.1 | 71.4 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1995 | 1983 | 1983 | 1998 | 1971 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | 3.1 | 7.2 | 20.4 | 35.1 | 45.8 | 57.2 | 60.8 | 60.0 | 50.7 | 38.6 | 22.5 | 6.4 | 3.1 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1995 | 1997 | 1982 | 1992 | 1986 | 1974 | 1987 | 1995 | 1989 | 1977 |
| Mean Min. Temperature (F) | 0.1 | 4.6 | 16.1 | 28.2 | 39.5 | 49.1 | 53.8 | 52.7 | 43.4 | 32.3 | 21.0 | 8.0 | 29.1 |
| Highest Mean Min. Temperature (F) | 12.0 | 20.9 | 24.8 | 33.7 | 46.6 | 53.4 | 57.6 | 58.8 | 47.9 | 41.4 | 27.1 | 18.8 | 58.8 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1986 | 1991 | 1995 | 1999 | 1995 | 1978 | 1971 | 1998 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -10.2 | -5.5 | 8.2 | 22.9 | 33.5 | 42.0 | 49.2 | 48.8 | 36.4 | 26.7 | 12.3 | -4.6 | -10.2 |
| Year Lowest Occurred | 1977 | 1979 | 1989 | 1975 | 1997 | 1982 | 1985 | 1982 | 1974 | 1976 | 1976 | 1989 | 1977 |
| Mean Precipitation (in.) | 1.18 | 0.89 | 1.88 | 2.49 | 3.26 | 3.51 | 3.29 | 3.67 | 3.71 | 2.27 | 2.19 | 1.49 | 29.83 |
| Highest Precipitation (in.) | 3.28 | 2.22 | 5.67 | 4.31 | 7.95 | 7.51 | 8.51 | 12.53 | 7.95 | 6.25 | 5.31 | 2.88 | 12.53 |
| Year Highest Occurred | 1996 | 1981 | 1977 | 1993 | 1973 | 1993 | 1982 | 1974 | 1994 | 1995 | 1985 | 1982 | 1974 |
| Lowest Precipitation (in.) | 0.07 | 0.07 | 0.05 | 0.41 | 0.77 | 1.02 | 0.33 | 1.22 | 1.10 | 0.49 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 1981 | 1993 | 1993 | 1997 | 1986 | 1988 | 1998 | 1991 | 1999 | 1975 | 1976 | 1986 | 1976 |
| Heating Degree Days (F) | 1644. | 1351. | 1159. | 723. | 373. | 122. | 55. | 79. | 277. | 638. | 1026. | 1455. | 8902. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 23. | 49. | 113. | 85. | 7. | 0. | 0. | 0. | 277. |