| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 42.3 | 42.6 | 43.4 | 48.0 | 55.6 | 66.4 | 74.0 | 73.6 | 67.7 | 58.2 | 48.1 | 43.4 | 55.3 |
| Highest Mean Max. Temperature (F) | 50.2 | 52.6 | 53.3 | 57.1 | 64.7 | 71.5 | 78.0 | 78.8 | 73.4 | 67.5 | 58.1 | 50.9 | 78.8 |
| Year Highest Occurred | 1986 | 1995 | 1997 | 1989 | 1997 | 2000 | 1996 | 1998 | 1974 | 1999 | 1995 | 1989 | 1998 |
| Lowest Mean Max. Temperature (F) | 34.4 | 37.0 | 34.9 | 36.8 | 43.6 | 58.2 | 69.1 | 64.9 | 58.0 | 49.2 | 39.7 | 33.7 | 33.7 |
| Year Lowest Occurred | 1979 | 1998 | 1991 | 1975 | 1977 | 1998 | 1987 | 1976 | 1986 | 1984 | 1994 | 1971 | 1971 |
| Mean Temperature (F) | 34.7 | 34.7 | 35.6 | 39.8 | 46.9 | 56.5 | 63.2 | 62.9 | 57.6 | 49.2 | 40.1 | 35.7 | 46.4 |
| Highest Mean Temperature (F) | 42.8 | 42.3 | 43.2 | 47.7 | 54.2 | 61.4 | 67.1 | 67.0 | 62.9 | 57.5 | 49.0 | 42.6 | 67.1 |
| Year Highest Occurred | 1986 | 1995 | 1997 | 1989 | 1997 | 1981 | 1996 | 1996 | 1974 | 1988 | 1995 | 1980 | 1996 |
| Lowest Mean Temperature (F) | 28.2 | 29.6 | 28.0 | 29.5 | 36.9 | 49.4 | 58.1 | 55.1 | 48.7 | 41.9 | 31.0 | 26.8 | 26.8 |
| Year Lowest Occurred | 1979 | 1990 | 1991 | 1975 | 1977 | 1998 | 1987 | 1976 | 1986 | 1984 | 1994 | 1971 | 1971 |
| Mean Min. Temperature (F) | 27.1 | 26.8 | 27.8 | 31.5 | 38.2 | 46.5 | 52.4 | 52.1 | 47.5 | 40.1 | 32.1 | 28.0 | 37.5 |
| Highest Mean Min. Temperature (F) | 35.3 | 33.7 | 34.7 | 38.2 | 45.1 | 51.3 | 56.3 | 55.7 | 52.4 | 48.2 | 39.9 | 34.7 | 56.3 |
| Year Highest Occurred | 1986 | 1991 | 1972 | 1989 | 1984 | 1981 | 1984 | 1971 | 1974 | 1988 | 1995 | 1980 | 1984 |
| Lowest Mean Min. Temperature (F) | 21.5 | 21.8 | 21.1 | 22.2 | 30.0 | 40.6 | 47.2 | 45.2 | 39.4 | 34.5 | 22.3 | 19.9 | 19.9 |
| Year Lowest Occurred | 1973 | 1990 | 1991 | 1975 | 1998 | 1998 | 1987 | 1976 | 1986 | 1984 | 1994 | 1971 | 1971 |
| Mean Precipitation (in.) | 8.23 | 7.58 | 7.44 | 3.07 | 1.50 | 0.57 | 0.23 | 0.11 | 1.25 | 2.23 | 4.31 | 5.55 | 42.07 |
| Highest Precipitation (in.) | 24.94 | 18.75 | 25.55 | 11.56 | 6.24 | 3.23 | 2.93 | 0.74 | 7.98 | 6.36 | 11.97 | 18.08 | 25.55 |
| Year Highest Occurred | 1980 | 1980 | 1991 | 1982 | 1995 | 1998 | 1992 | 1983 | 1982 | 1982 | 1983 | 1996 | 1991 |
| Lowest Precipitation (in.) | 0.06 | 0.74 | 0.00 | 0.04 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.00 | 0.00 |
| Year Lowest Occurred | 1976 | 1997 | 1972 | 1977 | 1985 | 1994 | 2000 | 1997 | 1996 | 1995 | 1995 | 1989 | 1972 |
| Heating Degree Days (F) | 940. | 848. | 896. | 757. | 568. | 270. | 108. | 119. | 247. | 501. | 747. | 907. | 6908. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 6. | 13. | 51. | 52. | 24. | 9. | 0. | 0. | 155. |