| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 25.4 | 30.0 | 40.4 | 53.6 | 66.9 | 76.5 | 81.0 | 78.5 | 70.4 | 58.3 | 43.1 | 30.4 | 54.5 |
| Highest Mean Max. Temperature (F) | 37.0 | 37.8 | 49.8 | 61.8 | 75.6 | 85.2 | 86.1 | 83.9 | 77.4 | 64.6 | 52.4 | 39.3 | 86.1 |
| Year Highest Occurred | 1990 | 1984 | 2000 | 1977 | 1977 | 1988 | 1988 | 1988 | 1998 | 1971 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 14.2 | 22.1 | 33.1 | 46.8 | 58.4 | 71.1 | 74.1 | 73.2 | 65.0 | 53.3 | 34.5 | 19.1 | 14.2 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1975 | 1997 | 1993 | 1992 | 1997 | 1993 | 1988 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 17.2 | 21.5 | 31.7 | 43.9 | 56.0 | 65.6 | 70.6 | 68.5 | 60.1 | 48.9 | 35.6 | 23.3 | 45.2 |
| Highest Mean Temperature (F) | 28.4 | 31.6 | 40.5 | 49.8 | 62.7 | 71.2 | 74.9 | 73.7 | 65.6 | 55.9 | 42.4 | 31.4 | 74.9 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1988 | 1983 | 1995 | 1998 | 1971 | 1999 | 1982 | 1983 |
| Lowest Mean Temperature (F) | 4.9 | 11.8 | 25.1 | 38.0 | 48.8 | 59.9 | 64.5 | 64.4 | 55.6 | 43.9 | 27.7 | 12.3 | 4.9 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1975 | 1997 | 1982 | 1992 | 1992 | 1975 | 1988 | 1995 | 1983 | 1977 |
| Mean Min. Temperature (F) | 9.0 | 13.0 | 23.0 | 34.2 | 45.0 | 54.6 | 60.1 | 58.5 | 49.8 | 39.5 | 28.0 | 16.1 | 35.9 |
| Highest Mean Min. Temperature (F) | 19.7 | 25.6 | 31.1 | 38.4 | 50.7 | 60.0 | 64.4 | 65.8 | 53.7 | 47.2 | 33.8 | 24.6 | 65.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1991 | 1987 | 1983 | 1995 | 1994 | 1971 | 1998 | 1982 | 1995 |
| Lowest Mean Min. Temperature (F) | -4.4 | 1.5 | 16.5 | 29.3 | 39.2 | 48.4 | 54.9 | 53.3 | 44.2 | 34.4 | 19.8 | 3.7 | -4.4 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1975 | 1976 | 1976 | 1976 | 1977 |
| Mean Precipitation (in.) | 1.40 | 1.25 | 2.42 | 3.47 | 3.67 | 3.93 | 3.94 | 4.55 | 4.02 | 2.93 | 2.85 | 1.87 | 36.30 |
| Highest Precipitation (in.) | 3.19 | 4.21 | 6.01 | 7.36 | 8.00 | 8.33 | 7.19 | 7.91 | 13.67 | 6.88 | 8.78 | 4.98 | 13.67 |
| Year Highest Occurred | 1999 | 1971 | 1977 | 1993 | 1973 | 1997 | 1991 | 1980 | 1986 | 1991 | 1985 | 1987 | 1986 |
| Lowest Precipitation (in.) | 0.00 | 0.06 | 0.05 | 0.81 | 0.80 | 0.77 | 0.73 | 1.02 | 0.04 | 0.37 | 0.30 | 0.17 | 0.00 |
| Year Lowest Occurred | 1981 | 1982 | 1978 | 1997 | 1988 | 1988 | 1998 | 1976 | 1979 | 1975 | 1976 | 1993 | 1981 |
| Heating Degree Days (F) | 1482. | 1219. | 1032. | 633. | 310. | 81. | 17. | 37. | 172. | 500. | 884. | 1294. | 7661. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 29. | 97. | 190. | 146. | 25. | 1. | 0. | 0. | 488. |