| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 29.2 | 34.1 | 40.4 | 48.9 | 58.9 | 69.3 | 78.6 | 77.9 | 66.8 | 53.8 | 37.3 | 29.2 | 52.0 |
| Highest Mean Max. Temperature (F) | 39.8 | 41.9 | 49.9 | 60.6 | 66.1 | 78.0 | 84.6 | 83.1 | 75.7 | 64.0 | 49.4 | 36.1 | 84.6 |
| Year Highest Occurred | 1981 | 1991 | 1992 | 1987 | 1992 | 1988 | 2000 | 1994 | 1990 | 1988 | 1999 | 1980 | 2000 |
| Lowest Mean Max. Temperature (F) | 18.2 | 23.1 | 33.3 | 35.1 | 50.8 | 59.7 | 67.5 | 71.5 | 58.3 | 47.4 | 27.7 | 18.7 | 18.2 |
| Year Lowest Occurred | 1979 | 1989 | 1975 | 1975 | 1975 | 1998 | 1993 | 1975 | 1986 | 1984 | 1985 | 1990 | 1979 |
| Mean Temperature (F) | 18.9 | 22.8 | 29.1 | 37.2 | 46.4 | 55.2 | 62.5 | 61.5 | 51.3 | 40.5 | 27.1 | 19.0 | 39.3 |
| Highest Mean Temperature (F) | 27.5 | 31.6 | 38.0 | 44.1 | 52.6 | 62.4 | 67.2 | 66.1 | 58.6 | 47.3 | 38.3 | 26.6 | 67.2 |
| Year Highest Occurred | 1981 | 1991 | 1992 | 1987 | 1994 | 1988 | 1998 | 1971 | 1998 | 1988 | 1999 | 1980 | 1998 |
| Lowest Mean Temperature (F) | 6.2 | 10.8 | 21.5 | 25.6 | 40.6 | 48.5 | 54.6 | 56.3 | 45.8 | 34.9 | 17.9 | 6.5 | 6.2 |
| Year Lowest Occurred | 1979 | 1989 | 1975 | 1975 | 1975 | 1998 | 1993 | 1976 | 1986 | 1984 | 1985 | 1978 | 1979 |
| Mean Min. Temperature (F) | 8.6 | 11.5 | 17.7 | 25.4 | 33.9 | 41.1 | 46.4 | 45.1 | 35.8 | 27.1 | 16.9 | 8.7 | 26.5 |
| Highest Mean Min. Temperature (F) | 19.4 | 21.2 | 26.8 | 31.1 | 39.2 | 46.8 | 50.2 | 49.7 | 43.3 | 32.3 | 27.2 | 17.0 | 50.2 |
| Year Highest Occurred | 1994 | 1991 | 1986 | 1992 | 1994 | 1988 | 1998 | 1991 | 1998 | 1992 | 1999 | 1980 | 1998 |
| Lowest Mean Min. Temperature (F) | -5.8 | -1.5 | 9.0 | 16.1 | 30.3 | 35.7 | 41.7 | 38.1 | 29.5 | 22.2 | 8.1 | -7.6 | -7.6 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1975 | 1982 | 1976 | 1993 | 1976 | 1974 | 1976 | 1985 | 1978 | 1978 |
| Mean Precipitation (in.) | 0.88 | 0.64 | 1.08 | 1.09 | 2.01 | 1.93 | 1.59 | 1.44 | 1.29 | 0.95 | 0.94 | 0.79 | 14.63 |
| Highest Precipitation (in.) | 3.24 | 1.84 | 3.05 | 2.73 | 3.66 | 4.76 | 3.57 | 4.21 | 3.17 | 2.33 | 1.96 | 1.91 | 4.76 |
| Year Highest Occurred | 1972 | 1978 | 1974 | 1993 | 1991 | 1998 | 1987 | 1982 | 1972 | 1989 | 1998 | 1978 | 1998 |
| Lowest Precipitation (in.) | 0.05 | 0.16 | 0.26 | 0.07 | 0.12 | 0.49 | 0.37 | 0.14 | 0.05 | 0.00 | 0.29 | 0.02 | 0.00 |
| Year Lowest Occurred | 1981 | 1977 | 1973 | 1979 | 1979 | 1988 | 1990 | 1988 | 1979 | 1987 | 1972 | 1986 | 1987 |
| Heating Degree Days (F) | 1430. | 1182. | 1114. | 835. | 578. | 306. | 136. | 164. | 416. | 761. | 1137. | 1429. | 9488. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 11. | 58. | 56. | 5. | 0. | 0. | 0. | 130. |