| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 31.6 | 33.9 | 43.4 | 56.0 | 68.2 | 76.4 | 81.2 | 79.0 | 70.8 | 59.5 | 47.9 | 36.4 | 57.0 |
| Highest Mean Max. Temperature (F) | 39.8 | 41.5 | 51.8 | 62.2 | 74.3 | 82.2 | 85.0 | 83.5 | 76.0 | 65.3 | 54.1 | 45.9 | 85.0 |
| Year Highest Occurred | 1990 | 1981 | 2000 | 1991 | 1991 | 1999 | 1999 | 1995 | 1983 | 1971 | 1975 | 1998 | 1999 |
| Lowest Mean Max. Temperature (F) | 22.6 | 21.3 | 35.6 | 49.5 | 63.2 | 70.7 | 77.4 | 75.0 | 66.7 | 55.0 | 42.6 | 22.5 | 21.3 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1975 | 1997 | 1972 | 1976 | 1982 | 1975 | 1976 | 1972 | 1989 | 1979 |
| Mean Temperature (F) | 21.1 | 23.1 | 32.7 | 44.0 | 55.5 | 64.0 | 68.6 | 66.5 | 58.2 | 46.8 | 37.7 | 26.9 | 45.4 |
| Highest Mean Temperature (F) | 31.3 | 30.4 | 40.2 | 48.5 | 60.8 | 68.3 | 72.7 | 70.8 | 63.7 | 52.8 | 43.7 | 36.1 | 72.7 |
| Year Highest Occurred | 1990 | 1984 | 2000 | 1991 | 1991 | 1999 | 1999 | 1988 | 1999 | 1990 | 1999 | 1998 | 1999 |
| Lowest Mean Temperature (F) | 11.3 | 11.9 | 26.1 | 38.1 | 51.7 | 60.0 | 65.8 | 61.9 | 54.6 | 41.0 | 32.8 | 12.8 | 11.3 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1972 | 1997 | 1980 | 1992 | 1982 | 1978 | 1974 | 1980 | 1989 | 1977 |
| Mean Min. Temperature (F) | 10.5 | 12.3 | 22.0 | 31.9 | 42.7 | 51.6 | 55.9 | 53.9 | 45.6 | 34.0 | 27.5 | 17.3 | 33.8 |
| Highest Mean Min. Temperature (F) | 22.7 | 20.1 | 28.5 | 36.1 | 47.8 | 55.6 | 60.4 | 59.1 | 52.9 | 41.3 | 33.8 | 26.2 | 60.4 |
| Year Highest Occurred | 1990 | 1984 | 2000 | 1987 | 1998 | 1996 | 1999 | 1988 | 1999 | 1990 | 1999 | 1998 | 1999 |
| Lowest Mean Min. Temperature (F) | -1.0 | 2.5 | 16.5 | 26.0 | 38.2 | 45.8 | 52.1 | 48.7 | 40.0 | 26.7 | 22.3 | 3.0 | -1.0 |
| Year Lowest Occurred | 1994 | 1979 | 1993 | 1972 | 1984 | 1980 | 1971 | 1982 | 1978 | 1974 | 1980 | 1989 | 1994 |
| Mean Precipitation (in.) | 3.70 | 3.03 | 3.60 | 3.85 | 5.00 | 4.18 | 4.16 | 4.63 | 4.07 | 4.00 | 4.12 | 3.64 | 47.98 |
| Highest Precipitation (in.) | 11.13 | 6.39 | 8.31 | 9.49 | 12.82 | 9.34 | 9.74 | 12.07 | 9.73 | 9.81 | 8.79 | 8.40 | 12.82 |
| Year Highest Occurred | 1979 | 1981 | 1977 | 1983 | 1984 | 1998 | 1988 | 1990 | 1999 | 1995 | 1972 | 1973 | 1984 |
| Lowest Precipitation (in.) | 0.18 | 0.06 | 0.50 | 1.25 | 1.25 | 0.76 | 2.11 | 1.12 | 1.16 | 1.42 | 0.86 | 1.27 | 0.06 |
| Year Lowest Occurred | 1980 | 1987 | 1981 | 1978 | 1980 | 1995 | 1982 | 1995 | 1986 | 1982 | 1976 | 1989 | 1987 |
| Heating Degree Days (F) | 1363. | 1173. | 1002. | 632. | 304. | 87. | 21. | 44. | 212. | 566. | 820. | 1182. | 7406. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 8. | 57. | 131. | 89. | 7. | 0. | 0. | 0. | 292. |