| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 22.9 | 29.5 | 40.6 | 55.4 | 68.9 | 77.3 | 81.3 | 78.9 | 70.2 | 58.2 | 41.5 | 27.8 | 54.4 |
| Highest Mean Max. Temperature (F) | 35.9 | 38.9 | 49.6 | 63.6 | 80.7 | 85.7 | 86.7 | 84.8 | 76.6 | 65.1 | 52.3 | 37.2 | 86.7 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1977 | 1977 | 1988 | 1988 | 1988 | 1998 | 1971 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 11.9 | 20.6 | 33.4 | 48.4 | 60.9 | 72.3 | 74.5 | 74.2 | 62.9 | 52.0 | 33.1 | 16.7 | 11.9 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1983 | 1982 | 1992 | 1997 | 1993 | 1980 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 12.9 | 19.0 | 30.4 | 44.0 | 56.2 | 64.9 | 69.2 | 66.9 | 58.0 | 46.7 | 32.5 | 18.7 | 43.3 |
| Highest Mean Temperature (F) | 25.7 | 31.2 | 39.5 | 51.3 | 66.0 | 69.7 | 73.2 | 72.8 | 62.5 | 54.6 | 40.0 | 26.5 | 73.2 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1971 | 1983 | 1995 | 1998 | 1971 | 1999 | 1998 | 1983 |
| Lowest Mean Temperature (F) | 0.9 | 8.1 | 23.4 | 38.2 | 49.7 | 58.0 | 63.7 | 62.8 | 52.2 | 41.2 | 25.0 | 7.1 | 0.9 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1983 | 1982 | 1992 | 1992 | 1993 | 1987 | 1995 | 1985 | 1977 |
| Mean Min. Temperature (F) | 2.8 | 8.4 | 20.2 | 32.5 | 43.4 | 52.5 | 57.1 | 54.9 | 45.8 | 35.1 | 23.4 | 9.6 | 32.1 |
| Highest Mean Min. Temperature (F) | 15.4 | 23.7 | 30.3 | 38.9 | 51.2 | 58.2 | 61.7 | 63.9 | 51.2 | 44.0 | 29.7 | 19.4 | 63.9 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1971 | 1999 | 1995 | 1994 | 1971 | 1998 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -10.2 | -4.4 | 12.3 | 27.3 | 38.4 | 43.6 | 52.8 | 50.1 | 40.4 | 28.7 | 14.9 | -3.8 | -10.2 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1982 | 1997 | 1982 | 1992 | 1992 | 1974 | 1988 | 1976 | 1985 | 1977 |
| Mean Precipitation (in.) | 1.11 | 0.84 | 2.03 | 3.18 | 3.48 | 4.25 | 4.65 | 4.62 | 3.83 | 2.33 | 2.38 | 1.31 | 34.01 |
| Highest Precipitation (in.) | 2.84 | 2.54 | 4.20 | 5.92 | 7.74 | 10.63 | 15.84 | 13.79 | 10.99 | 5.18 | 4.56 | 3.13 | 15.84 |
| Year Highest Occurred | 1980 | 1971 | 1977 | 1973 | 1973 | 1998 | 1999 | 1980 | 1986 | 1995 | 1991 | 1984 | 1999 |
| Lowest Precipitation (in.) | 0.00 | 0.02 | 0.21 | 0.58 | 1.00 | 0.75 | 1.60 | 1.17 | 0.36 | 0.48 | 0.10 | 0.27 | 0.00 |
| Year Lowest Occurred | 1981 | 1987 | 1978 | 1997 | 1986 | 1983 | 1985 | 1976 | 1979 | 2000 | 1976 | 1980 | 1981 |
| Heating Degree Days (F) | 1616. | 1290. | 1073. | 633. | 306. | 85. | 25. | 54. | 224. | 569. | 977. | 1435. | 8287. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 31. | 81. | 155. | 112. | 14. | 0. | 0. | 0. | 393. |