| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.4 | 27.2 | 38.4 | 54.0 | 68.8 | 77.2 | 81.3 | 78.9 | 68.7 | 56.1 | 37.5 | 23.6 | 52.6 |
| Highest Mean Max. Temperature (F) | 30.9 | 39.1 | 47.8 | 64.5 | 79.1 | 83.3 | 88.7 | 85.0 | 75.8 | 62.4 | 47.9 | 32.4 | 88.7 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1976 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Max. Temperature (F) | 9.7 | 17.6 | 30.2 | 45.3 | 59.9 | 71.3 | 73.8 | 73.5 | 62.1 | 50.4 | 28.3 | 12.7 | 9.7 |
| Year Lowest Occurred | 1979 | 1989 | 1996 | 1995 | 1997 | 1993 | 1992 | 1985 | 1993 | 1987 | 1995 | 1983 | 1979 |
| Mean Temperature (F) | 7.3 | 14.2 | 26.4 | 40.6 | 53.8 | 62.8 | 67.8 | 65.6 | 55.6 | 44.1 | 28.2 | 13.3 | 40.0 |
| Highest Mean Temperature (F) | 17.5 | 29.6 | 34.8 | 46.5 | 62.4 | 67.1 | 71.9 | 69.4 | 61.1 | 49.6 | 36.6 | 23.5 | 71.9 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1995 | 1974 | 1984 | 1998 | 1973 | 1999 | 1997 | 1974 |
| Lowest Mean Temperature (F) | -3.4 | 1.8 | 18.1 | 34.7 | 46.9 | 57.7 | 61.4 | 60.9 | 49.5 | 38.6 | 19.3 | 0.4 | -3.4 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1996 | 1997 | 1985 | 1992 | 1977 | 1993 | 1976 | 1995 | 1983 | 1982 |
| Mean Min. Temperature (F) | -4.9 | 1.1 | 14.4 | 27.1 | 38.7 | 48.4 | 54.2 | 52.2 | 42.5 | 32.0 | 18.8 | 2.9 | 27.3 |
| Highest Mean Min. Temperature (F) | 8.5 | 20.1 | 24.4 | 32.9 | 45.8 | 51.8 | 57.5 | 56.3 | 47.5 | 39.5 | 25.4 | 14.5 | 57.5 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1986 | 1977 | 1991 | 1987 | 1995 | 1994 | 1971 | 1998 | 1997 | 1987 |
| Lowest Mean Min. Temperature (F) | -17.7 | -14.0 | 6.0 | 22.5 | 32.2 | 41.9 | 48.9 | 47.3 | 36.9 | 25.2 | 10.2 | -11.9 | -17.7 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1996 | 1983 | 1985 | 1992 | 1992 | 1993 | 1976 | 1995 | 1983 | 1982 |
| Mean Precipitation (in.) | 1.06 | 0.81 | 1.67 | 2.17 | 3.22 | 3.95 | 4.86 | 4.24 | 3.56 | 2.55 | 2.11 | 0.95 | 31.15 |
| Highest Precipitation (in.) | 2.89 | 2.87 | 3.55 | 4.12 | 5.56 | 7.77 | 14.95 | 9.02 | 7.81 | 7.73 | 6.06 | 2.16 | 14.95 |
| Year Highest Occurred | 1975 | 1981 | 1977 | 1981 | 1991 | 1999 | 1999 | 1977 | 1990 | 1971 | 1975 | 1972 | 1999 |
| Lowest Precipitation (in.) | 0.04 | 0.11 | 0.21 | 0.37 | 0.71 | 1.59 | 1.52 | 1.11 | 0.80 | 0.59 | 0.35 | 0.23 | 0.04 |
| Year Lowest Occurred | 1981 | 1987 | 1987 | 1987 | 1976 | 1987 | 1998 | 1982 | 1976 | 1976 | 1981 | 1979 | 1981 |
| Heating Degree Days (F) | 1792. | 1424. | 1198. | 734. | 370. | 115. | 44. | 79. | 291. | 650. | 1106. | 1605. | 9408. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 21. | 48. | 130. | 95. | 7. | 0. | 0. | 0. | 301. |