| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 23.4 | 30.3 | 41.3 | 56.3 | 69.8 | 78.1 | 82.2 | 79.6 | 70.3 | 58.0 | 41.3 | 27.9 | 54.9 |
| Highest Mean Max. Temperature (F) | 33.5 | 38.9 | 51.2 | 64.5 | 81.4 | 85.2 | 88.3 | 85.4 | 77.1 | 65.1 | 51.3 | 35.8 | 88.3 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1988 | 1988 | 1988 | 1998 | 1973 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 13.7 | 22.6 | 34.6 | 49.7 | 61.5 | 73.0 | 73.3 | 75.6 | 63.8 | 51.8 | 32.9 | 16.9 | 13.7 |
| Year Lowest Occurred | 1994 | 1979 | 1972 | 1975 | 1983 | 1982 | 1992 | 1986 | 1993 | 1988 | 1995 | 1989 | 1994 |
| Mean Temperature (F) | 13.7 | 19.7 | 30.8 | 44.4 | 57.0 | 65.8 | 70.4 | 68.0 | 58.8 | 47.0 | 32.4 | 19.2 | 43.9 |
| Highest Mean Temperature (F) | 23.2 | 31.8 | 39.7 | 50.6 | 65.8 | 70.3 | 74.8 | 73.4 | 64.5 | 54.1 | 39.7 | 26.4 | 74.8 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1995 | 1983 | 1995 | 1998 | 1971 | 1999 | 1987 | 1983 |
| Lowest Mean Temperature (F) | 2.1 | 10.5 | 24.2 | 38.8 | 49.4 | 60.0 | 63.1 | 63.0 | 53.1 | 40.6 | 24.8 | 7.8 | 2.1 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1987 | 1995 | 1989 | 1977 |
| Mean Min. Temperature (F) | 3.9 | 9.1 | 20.2 | 32.4 | 44.1 | 53.4 | 58.5 | 56.3 | 47.2 | 35.9 | 23.4 | 10.4 | 32.9 |
| Highest Mean Min. Temperature (F) | 14.0 | 24.6 | 30.4 | 37.4 | 50.4 | 58.0 | 62.6 | 64.5 | 51.9 | 44.5 | 29.3 | 20.4 | 64.5 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1985 | 1998 | 1995 | 1999 | 1995 | 1998 | 1971 | 1998 | 1987 | 1995 |
| Lowest Mean Min. Temperature (F) | -9.8 | -2.8 | 13.5 | 27.2 | 37.2 | 46.9 | 52.8 | 48.7 | 40.7 | 29.2 | 12.8 | -2.6 | -9.8 |
| Year Lowest Occurred | 1977 | 1978 | 1996 | 1982 | 1997 | 1982 | 1992 | 1992 | 1976 | 1987 | 1976 | 1976 | 1977 |
| Mean Precipitation (in.) | 1.13 | 1.03 | 2.03 | 2.99 | 3.38 | 3.86 | 4.18 | 4.29 | 3.59 | 2.49 | 2.07 | 1.38 | 32.42 |
| Highest Precipitation (in.) | 2.40 | 3.00 | 3.68 | 5.63 | 8.82 | 9.73 | 9.57 | 10.66 | 8.85 | 8.81 | 4.39 | 2.70 | 10.66 |
| Year Highest Occurred | 1996 | 1981 | 1977 | 1973 | 1989 | 1998 | 1999 | 1995 | 1986 | 1984 | 1991 | 1971 | 1995 |
| Lowest Precipitation (in.) | 0.09 | 0.22 | 0.13 | 0.98 | 0.73 | 0.95 | 0.64 | 1.21 | 0.18 | 0.26 | 0.04 | 0.31 | 0.04 |
| Year Lowest Occurred | 1981 | 1993 | 1999 | 1989 | 1988 | 1988 | 1998 | 1976 | 1979 | 2000 | 1976 | 1994 | 1976 |
| Heating Degree Days (F) | 1592. | 1270. | 1063. | 621. | 291. | 71. | 25. | 48. | 209. | 561. | 980. | 1422. | 8153. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 41. | 93. | 191. | 138. | 20. | 1. | 0. | 0. | 485. |