| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.6 | 26.7 | 38.5 | 55.1 | 68.7 | 76.1 | 80.5 | 78.0 | 69.1 | 57.1 | 38.0 | 23.8 | 52.6 |
| Highest Mean Max. Temperature (F) | 32.2 | 39.0 | 49.0 | 66.5 | 76.2 | 84.2 | 88.0 | 83.3 | 76.1 | 62.5 | 49.7 | 32.7 | 88.0 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1998 | 1988 | 1988 | 1988 | 1998 | 2000 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 7.6 | 17.3 | 29.5 | 45.5 | 61.9 | 71.0 | 73.5 | 73.0 | 62.8 | 51.8 | 29.7 | 12.4 | 7.6 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1974 | 1982 | 1992 | 1985 | 1993 | 1972 | 1991 | 1983 | 1977 |
| Mean Temperature (F) | 10.7 | 17.7 | 29.8 | 44.5 | 57.4 | 65.3 | 69.9 | 67.8 | 59.0 | 47.3 | 30.7 | 16.1 | 43.0 |
| Highest Mean Temperature (F) | 23.8 | 30.8 | 38.7 | 51.5 | 64.6 | 70.4 | 74.3 | 72.3 | 64.7 | 52.4 | 39.9 | 25.0 | 74.3 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1987 | 1988 | 1998 | 1971 | 1999 | 1997 | 1987 |
| Lowest Mean Temperature (F) | -1.2 | 6.7 | 20.7 | 37.5 | 51.7 | 59.7 | 63.6 | 63.5 | 53.2 | 41.1 | 23.0 | 3.1 | -1.2 |
| Year Lowest Occurred | 1977 | 1989 | 1975 | 1975 | 1979 | 1982 | 1992 | 1977 | 1993 | 1976 | 1991 | 1983 | 1977 |
| Mean Min. Temperature (F) | 1.7 | 8.6 | 21.0 | 33.8 | 46.0 | 54.4 | 59.2 | 57.6 | 48.8 | 37.5 | 23.4 | 8.3 | 33.4 |
| Highest Mean Min. Temperature (F) | 15.4 | 23.8 | 32.3 | 40.1 | 53.4 | 59.9 | 63.9 | 62.7 | 53.3 | 43.5 | 30.0 | 19.2 | 63.9 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1991 | 1987 | 1983 | 1998 | 1971 | 1999 | 1997 | 1987 |
| Lowest Mean Min. Temperature (F) | -10.7 | -4.0 | 11.9 | 28.3 | 40.0 | 48.4 | 53.7 | 52.7 | 41.8 | 29.6 | 13.9 | -6.2 | -10.7 |
| Year Lowest Occurred | 1982 | 1989 | 1975 | 1996 | 1997 | 1982 | 1992 | 1977 | 1974 | 1976 | 1976 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.96 | 0.79 | 1.67 | 2.38 | 3.53 | 4.28 | 4.09 | 4.38 | 3.87 | 2.65 | 2.06 | 0.92 | 31.58 |
| Highest Precipitation (in.) | 2.50 | 3.44 | 4.61 | 5.45 | 8.19 | 8.51 | 11.27 | 8.49 | 9.39 | 6.20 | 5.50 | 2.90 | 11.27 |
| Year Highest Occurred | 1975 | 1981 | 1977 | 1986 | 1991 | 1981 | 1972 | 1995 | 1991 | 1971 | 1991 | 1982 | 1972 |
| Lowest Precipitation (in.) | 0.01 | 0.08 | 0.27 | 0.11 | 0.99 | 1.06 | 1.19 | 1.40 | 0.95 | 0.53 | 0.25 | 0.16 | 0.01 |
| Year Lowest Occurred | 1981 | 1988 | 1987 | 1987 | 1976 | 1987 | 1981 | 2000 | 2000 | 1976 | 1981 | 1980 | 1981 |
| Heating Degree Days (F) | 1684. | 1325. | 1093. | 617. | 272. | 84. | 24. | 47. | 204. | 548. | 1030. | 1517. | 8445. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 34. | 91. | 174. | 134. | 23. | 0. | 0. | 0. | 457. |