| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.9 | 27.2 | 38.4 | 55.3 | 68.3 | 77.2 | 84.0 | 82.8 | 72.2 | 58.3 | 37.5 | 24.2 | 53.8 |
| Highest Mean Max. Temperature (F) | 34.3 | 38.9 | 49.7 | 65.6 | 75.9 | 87.8 | 91.2 | 90.1 | 79.5 | 63.9 | 52.9 | 37.2 | 91.2 |
| Year Highest Occurred | 1990 | 1987 | 1981 | 1987 | 1977 | 1988 | 1974 | 1976 | 1978 | 1974 | 1999 | 1979 | 1974 |
| Lowest Mean Max. Temperature (F) | 6.2 | 12.1 | 28.5 | 43.2 | 59.5 | 70.4 | 71.6 | 75.0 | 63.8 | 54.6 | 25.0 | 6.0 | 6.0 |
| Year Lowest Occurred | 1978 | 1979 | 1996 | 1975 | 1996 | 1993 | 1992 | 1992 | 1985 | 1995 | 1985 | 1983 | 1983 |
| Mean Temperature (F) | 10.0 | 17.2 | 28.1 | 42.9 | 56.3 | 65.5 | 71.2 | 69.2 | 58.7 | 45.6 | 28.0 | 14.7 | 42.3 |
| Highest Mean Temperature (F) | 24.7 | 29.3 | 36.2 | 50.5 | 63.5 | 73.8 | 76.5 | 74.7 | 64.9 | 49.8 | 40.0 | 26.1 | 76.5 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1974 | 1983 | 1998 | 1973 | 1999 | 1997 | 1974 |
| Lowest Mean Temperature (F) | -4.5 | 1.7 | 18.8 | 35.6 | 50.5 | 60.2 | 62.3 | 63.3 | 52.9 | 41.7 | 16.2 | -2.4 | -4.5 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1975 | 1996 | 1993 | 1992 | 1992 | 1993 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | 0.0 | 7.2 | 17.7 | 30.5 | 44.3 | 53.7 | 58.4 | 55.5 | 45.1 | 32.9 | 18.5 | 5.2 | 30.8 |
| Highest Mean Min. Temperature (F) | 15.2 | 22.0 | 25.5 | 35.5 | 51.0 | 59.9 | 61.7 | 60.0 | 50.7 | 38.0 | 27.1 | 18.8 | 61.7 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1988 | 1974 | 1983 | 1998 | 1994 | 1999 | 1997 | 1974 |
| Lowest Mean Min. Temperature (F) | -15.3 | -8.8 | 9.0 | 26.3 | 40.2 | 48.2 | 52.9 | 50.6 | 39.7 | 27.7 | 7.5 | -10.9 | -15.3 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1996 | 1983 | 1982 | 1992 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.47 | 0.60 | 1.04 | 2.06 | 3.06 | 3.38 | 2.80 | 2.42 | 1.59 | 1.55 | 0.87 | 0.42 | 20.26 |
| Highest Precipitation (in.) | 1.70 | 1.52 | 2.46 | 6.19 | 6.12 | 6.58 | 9.55 | 5.51 | 5.65 | 6.49 | 2.42 | 1.51 | 9.55 |
| Year Highest Occurred | 1997 | 1987 | 1973 | 1986 | 1991 | 1990 | 1993 | 2000 | 1996 | 1998 | 1992 | 1996 | 1993 |
| Lowest Precipitation (in.) | 0.06 | 0.00 | 0.10 | 0.13 | 0.43 | 0.56 | 0.82 | 0.29 | 0.07 | 0.11 | 0.02 | 0.00 | 0.00 |
| Year Lowest Occurred | 1991 | 1973 | 1971 | 1992 | 1994 | 1973 | 1991 | 1996 | 1998 | 1993 | 1999 | 1986 | 1973 |
| Heating Degree Days (F) | 1707. | 1338. | 1146. | 662. | 291. | 85. | 35. | 43. | 223. | 602. | 1109. | 1560. | 8801. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 20. | 98. | 227. | 172. | 32. | 0. | 0. | 0. | 550. |