| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 45.5 | 51.2 | 56.6 | 63.0 | 71.7 | 80.3 | 88.6 | 88.2 | 81.7 | 69.8 | 52.8 | 44.8 | 66.2 |
| Highest Mean Max. Temperature (F) | 50.7 | 60.1 | 63.5 | 72.0 | 81.6 | 86.2 | 93.9 | 93.4 | 89.7 | 80.7 | 61.8 | 52.7 | 93.9 |
| Year Highest Occurred | 1986 | 1991 | 1997 | 1987 | 1992 | 1977 | 1988 | 1986 | 1991 | 1988 | 1976 | 1976 | 1988 |
| Lowest Mean Max. Temperature (F) | 39.5 | 43.0 | 50.3 | 53.1 | 61.9 | 72.8 | 82.4 | 78.6 | 73.3 | 60.6 | 44.3 | 38.8 | 38.8 |
| Year Lowest Occurred | 1993 | 1993 | 1991 | 1975 | 1977 | 1980 | 1983 | 1976 | 1986 | 1984 | 1994 | 1972 | 1972 |
| Mean Temperature (F) | 31.9 | 36.7 | 40.8 | 45.6 | 52.7 | 59.8 | 65.6 | 64.0 | 57.7 | 48.3 | 37.8 | 31.6 | 47.7 |
| Highest Mean Temperature (F) | 38.0 | 42.5 | 46.3 | 50.2 | 60.2 | 65.5 | 70.3 | 68.5 | 63.7 | 54.0 | 43.8 | 36.8 | 70.3 |
| Year Highest Occurred | 1978 | 1995 | 1978 | 1989 | 1997 | 1977 | 1998 | 1998 | 1998 | 1987 | 1995 | 1977 | 1998 |
| Lowest Mean Temperature (F) | 24.4 | 27.9 | 35.9 | 38.9 | 47.1 | 55.6 | 61.0 | 59.7 | 51.3 | 43.0 | 31.5 | 22.6 | 22.6 |
| Year Lowest Occurred | 1977 | 1990 | 1985 | 1975 | 1977 | 1993 | 1993 | 1985 | 1986 | 1984 | 1985 | 1990 | 1990 |
| Mean Min. Temperature (F) | 18.3 | 22.2 | 24.9 | 28.1 | 33.6 | 39.2 | 42.6 | 39.8 | 33.6 | 26.8 | 22.8 | 18.4 | 29.2 |
| Highest Mean Min. Temperature (F) | 30.4 | 31.7 | 30.8 | 32.8 | 40.5 | 44.9 | 49.3 | 44.4 | 42.5 | 31.3 | 31.5 | 26.7 | 49.3 |
| Year Highest Occurred | 1998 | 2000 | 1978 | 1988 | 1997 | 1997 | 1998 | 1977 | 1998 | 1979 | 1973 | 1973 | 1998 |
| Lowest Mean Min. Temperature (F) | 5.3 | 11.3 | 17.0 | 21.8 | 28.3 | 34.4 | 36.0 | 32.8 | 29.3 | 20.6 | 14.2 | 5.7 | 5.3 |
| Year Lowest Occurred | 1977 | 1990 | 1985 | 1987 | 1985 | 1979 | 1989 | 1985 | 1986 | 1990 | 1986 | 1990 | 1977 |
| Mean Precipitation (in.) | 4.40 | 4.06 | 3.83 | 1.95 | 1.64 | 0.76 | 0.20 | 0.37 | 0.87 | 1.69 | 3.36 | 3.76 | 26.89 |
| Highest Precipitation (in.) | 10.78 | 10.12 | 9.46 | 4.79 | 6.23 | 2.99 | 1.04 | 2.05 | 3.28 | 5.00 | 9.95 | 11.19 | 11.19 |
| Year Highest Occurred | 1974 | 1998 | 1974 | 1978 | 1998 | 1971 | 1992 | 1976 | 1985 | 1981 | 1998 | 1996 | 1996 |
| Lowest Precipitation (in.) | 0.14 | 0.15 | 0.73 | 0.16 | 0.11 | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.09 | 0.00 |
| Year Lowest Occurred | 1976 | 1988 | 1976 | 1985 | 1976 | 1979 | 1999 | 1998 | 1991 | 1978 | 1986 | 1989 | 1999 |
| Heating Degree Days (F) | 1026. | 792. | 753. | 584. | 386. | 180. | 78. | 91. | 236. | 518. | 815. | 1036. | 6495. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 3. | 23. | 97. | 59. | 14. | 0. | 0. | 0. | 196. |