| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 33.9 | 41.4 | 50.7 | 61.0 | 69.9 | 79.5 | 86.9 | 86.7 | 75.4 | 63.5 | 46.6 | 36.6 | 61.0 |
| Highest Mean Max. Temperature (F) | 49.3 | 55.2 | 61.7 | 72.9 | 76.4 | 92.6 | 92.8 | 94.0 | 83.7 | 69.9 | 59.1 | 47.9 | 94.0 |
| Year Highest Occurred | 1981 | 1991 | 1986 | 1987 | 1985 | 1988 | 2000 | 1971 | 1998 | 1974 | 1999 | 1999 | 1971 |
| Lowest Mean Max. Temperature (F) | 16.1 | 25.5 | 37.2 | 50.9 | 61.1 | 71.3 | 75.3 | 79.4 | 65.7 | 58.7 | 28.4 | 17.3 | 16.1 |
| Year Lowest Occurred | 1979 | 1989 | 1996 | 1975 | 1996 | 1998 | 1993 | 1993 | 1986 | 1981 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 20.3 | 27.0 | 35.7 | 45.4 | 54.5 | 63.6 | 69.5 | 68.6 | 57.6 | 46.3 | 32.0 | 22.7 | 45.3 |
| Highest Mean Temperature (F) | 33.5 | 39.2 | 44.9 | 52.0 | 59.3 | 73.1 | 74.5 | 74.9 | 66.2 | 50.3 | 42.4 | 34.6 | 74.9 |
| Year Highest Occurred | 1986 | 1991 | 1986 | 1987 | 1987 | 1988 | 1998 | 1983 | 1998 | 1974 | 1999 | 1999 | 1983 |
| Lowest Mean Temperature (F) | 1.8 | 12.3 | 25.6 | 37.6 | 49.7 | 58.6 | 62.0 | 63.4 | 52.9 | 42.8 | 15.4 | 1.8 | 1.8 |
| Year Lowest Occurred | 1979 | 1989 | 1996 | 1975 | 1996 | 1998 | 1993 | 1993 | 1985 | 1981 | 1985 | 1983 | 1983 |
| Mean Min. Temperature (F) | 6.7 | 12.6 | 20.7 | 29.7 | 39.1 | 47.6 | 52.0 | 50.4 | 39.8 | 29.0 | 17.4 | 8.8 | 29.5 |
| Highest Mean Min. Temperature (F) | 21.8 | 24.8 | 28.0 | 33.6 | 43.4 | 53.5 | 57.5 | 56.8 | 48.7 | 33.3 | 26.5 | 21.3 | 57.5 |
| Year Highest Occurred | 1986 | 1999 | 1986 | 1998 | 1987 | 1988 | 1998 | 1983 | 1998 | 1998 | 1998 | 1999 | 1998 |
| Lowest Mean Min. Temperature (F) | -12.5 | -2.5 | 13.9 | 24.4 | 34.6 | 45.2 | 46.1 | 46.2 | 35.1 | 23.3 | 2.3 | -13.8 | -13.8 |
| Year Lowest Occurred | 1979 | 1979 | 1996 | 1975 | 1973 | 1975 | 1971 | 1992 | 1972 | 1976 | 1985 | 1983 | 1983 |
| Mean Precipitation (in.) | 0.59 | 0.48 | 0.91 | 1.60 | 2.37 | 1.89 | 1.47 | 1.05 | 1.42 | 1.15 | 0.63 | 0.61 | 14.17 |
| Highest Precipitation (in.) | 2.04 | 1.83 | 2.45 | 3.23 | 6.57 | 5.01 | 7.38 | 3.71 | 4.62 | 3.58 | 2.03 | 1.95 | 7.38 |
| Year Highest Occurred | 1978 | 2000 | 1985 | 1976 | 1981 | 1991 | 1993 | 1972 | 1978 | 1994 | 1978 | 1989 | 1993 |
| Lowest Precipitation (in.) | 0.02 | 0.00 | 0.27 | 0.11 | 0.52 | 0.79 | 0.01 | 0.09 | 0.07 | 0.00 | 0.03 | 0.00 | 0.00 |
| Year Lowest Occurred | 1987 | 1977 | 1978 | 1983 | 1984 | 1990 | 1988 | 1991 | 1979 | 1987 | 1971 | 1986 | 1977 |
| Heating Degree Days (F) | 1385. | 1064. | 908. | 590. | 331. | 115. | 38. | 54. | 249. | 581. | 991. | 1310. | 7616. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 6. | 72. | 176. | 164. | 27. | 0. | 0. | 0. | 445. |