| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 23.5 | 30.3 | 40.8 | 56.3 | 69.1 | 78.3 | 84.8 | 83.8 | 73.1 | 60.0 | 39.4 | 27.3 | 55.6 |
| Highest Mean Max. Temperature (F) | 35.0 | 41.7 | 50.0 | 66.8 | 77.0 | 91.8 | 90.4 | 89.6 | 80.8 | 64.5 | 55.1 | 39.7 | 91.8 |
| Year Highest Occurred | 1992 | 1984 | 2000 | 1987 | 1994 | 1988 | 1989 | 1995 | 1998 | 1993 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | 6.5 | 12.1 | 33.4 | 41.9 | 62.4 | 72.4 | 77.6 | 77.2 | 64.8 | 56.1 | 24.4 | 7.8 | 6.5 |
| Year Lowest Occurred | 1978 | 1979 | 1975 | 1975 | 1979 | 1982 | 1992 | 1974 | 1986 | 1982 | 1985 | 1983 | 1978 |
| Mean Temperature (F) | 13.4 | 20.6 | 30.7 | 44.6 | 57.4 | 66.7 | 72.5 | 71.1 | 60.0 | 47.6 | 30.1 | 17.9 | 44.4 |
| Highest Mean Temperature (F) | 26.0 | 31.8 | 38.1 | 53.6 | 63.6 | 78.6 | 77.8 | 77.5 | 65.8 | 50.8 | 38.3 | 29.2 | 78.6 |
| Year Highest Occurred | 1990 | 1984 | 1986 | 1987 | 1977 | 1988 | 1989 | 1983 | 1978 | 2000 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -1.4 | 2.6 | 22.2 | 34.8 | 51.9 | 61.6 | 65.4 | 64.3 | 55.6 | 44.1 | 17.3 | 0.4 | -1.4 |
| Year Lowest Occurred | 1978 | 1979 | 1996 | 1975 | 1979 | 1998 | 1992 | 1974 | 1999 | 1991 | 1985 | 1983 | 1978 |
| Mean Min. Temperature (F) | 3.2 | 10.9 | 20.6 | 32.8 | 45.7 | 55.1 | 60.2 | 58.3 | 46.9 | 35.2 | 20.8 | 8.5 | 33.2 |
| Highest Mean Min. Temperature (F) | 17.1 | 24.5 | 29.2 | 40.3 | 53.7 | 65.4 | 65.5 | 66.0 | 53.2 | 39.6 | 29.4 | 21.0 | 66.0 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1988 | 1987 | 1983 | 1978 | 1984 | 1987 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -12.4 | -7.0 | 10.0 | 26.0 | 40.3 | 49.3 | 53.1 | 51.1 | 39.3 | 29.0 | 9.4 | -7.0 | -12.4 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1997 | 1997 | 1998 | 1992 | 1992 | 1974 | 1992 | 1996 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.24 | 0.30 | 0.66 | 1.34 | 2.16 | 2.64 | 2.06 | 1.62 | 1.28 | 1.26 | 0.35 | 0.23 | 14.14 |
| Highest Precipitation (in.) | 0.88 | 1.83 | 1.59 | 5.62 | 5.80 | 5.45 | 5.68 | 5.43 | 4.62 | 4.60 | 0.98 | 0.93 | 5.80 |
| Year Highest Occurred | 1972 | 1987 | 1989 | 1974 | 1999 | 1971 | 1993 | 1998 | 1996 | 1998 | 1992 | 1972 | 1999 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.04 | 0.09 | 0.40 | 0.08 | 0.07 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 1991 | 1985 | 1999 | 1987 | 1997 | 1974 | 1988 | 1971 | 1982 | 1988 | 1990 | 1991 | 1991 |
| Heating Degree Days (F) | 1603. | 1244. | 1063. | 618. | 268. | 85. | 20. | 32. | 185. | 539. | 1048. | 1461. | 8166. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 4. | 31. | 136. | 252. | 219. | 36. | 0. | 0. | 0. | 678. |