| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 28.5 | 36.2 | 46.8 | 59.5 | 69.2 | 78.5 | 86.0 | 85.8 | 73.7 | 61.2 | 42.0 | 32.7 | 58.3 |
| Highest Mean Max. Temperature (F) | 45.2 | 50.9 | 56.1 | 69.1 | 77.0 | 93.0 | 92.8 | 95.2 | 82.6 | 66.9 | 55.1 | 46.6 | 95.2 |
| Year Highest Occurred | 1992 | 1991 | 1981 | 1987 | 1988 | 1988 | 1985 | 1971 | 1998 | 1974 | 1999 | 1999 | 1971 |
| Lowest Mean Max. Temperature (F) | 11.5 | 18.6 | 31.0 | 46.8 | 59.2 | 71.6 | 73.6 | 77.3 | 61.4 | 55.9 | 19.6 | 12.2 | 11.5 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1975 | 1974 | 1998 | 1993 | 1993 | 1985 | 1984 | 1985 | 1983 | 1982 |
| Mean Temperature (F) | 15.4 | 22.5 | 33.0 | 44.3 | 54.3 | 63.9 | 69.7 | 68.7 | 56.5 | 45.1 | 28.9 | 19.5 | 43.5 |
| Highest Mean Temperature (F) | 30.9 | 36.0 | 42.3 | 51.2 | 59.8 | 74.5 | 74.5 | 76.3 | 64.7 | 49.4 | 38.8 | 31.8 | 76.3 |
| Year Highest Occurred | 1986 | 1991 | 1986 | 1987 | 1988 | 1988 | 1985 | 1971 | 1998 | 1986 | 1999 | 1999 | 1971 |
| Lowest Mean Temperature (F) | -2.8 | 5.9 | 19.8 | 35.5 | 46.8 | 59.2 | 61.3 | 61.8 | 49.3 | 39.6 | 9.1 | -2.3 | -2.8 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1975 | 1974 | 1993 | 1993 | 1974 | 1985 | 1984 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | 2.3 | 8.8 | 19.1 | 29.0 | 39.3 | 49.3 | 53.3 | 51.6 | 39.3 | 29.0 | 15.7 | 6.3 | 28.6 |
| Highest Mean Min. Temperature (F) | 20.9 | 23.8 | 28.8 | 33.3 | 43.5 | 56.0 | 57.6 | 57.3 | 46.7 | 35.0 | 24.4 | 18.0 | 57.6 |
| Year Highest Occurred | 1986 | 1999 | 1986 | 1987 | 1987 | 1988 | 1975 | 1971 | 1998 | 1986 | 1998 | 1993 | 1975 |
| Lowest Mean Min. Temperature (F) | -17.1 | -7.8 | 8.6 | 22.5 | 34.3 | 45.5 | 48.2 | 45.6 | 34.9 | 23.3 | -1.4 | -16.7 | -17.1 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1983 | 1974 | 1985 | 1999 | 1987 | 1972 | 1984 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.32 | 0.28 | 0.63 | 0.98 | 2.38 | 2.25 | 1.86 | 1.27 | 1.10 | 0.56 | 0.38 | 0.39 | 12.40 |
| Highest Precipitation (in.) | 1.56 | 1.02 | 1.90 | 2.82 | 4.90 | 6.19 | 4.60 | 4.27 | 8.74 | 1.95 | 1.24 | 2.00 | 8.74 |
| Year Highest Occurred | 1971 | 1979 | 1975 | 1973 | 1978 | 1991 | 1993 | 1985 | 1986 | 1981 | 1998 | 1977 | 1986 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.07 | 0.11 | 0.21 | 0.49 | 0.00 | 0.06 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 1973 | 1990 | 1992 | 1977 | 1993 | 1979 | 1971 | 1996 | 1990 | 1990 | 1972 | 1991 | 1973 |
| Heating Degree Days (F) | 1538. | 1189. | 993. | 622. | 342. | 117. | 45. | 79. | 288. | 617. | 1085. | 1412. | 8327. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 9. | 85. | 189. | 193. | 33. | 0. | 0. | 0. | 509. |