| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.4 | 26.1 | 38.5 | 54.8 | 67.8 | 76.9 | 80.5 | 77.8 | 69.8 | 58.2 | 38.7 | 24.1 | 52.7 |
| Highest Mean Max. Temperature (F) | 34.8 | 39.6 | 51.5 | 65.1 | 78.3 | 85.9 | 87.3 | 84.1 | 76.1 | 64.1 | 52.1 | 35.0 | 87.3 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1988 | 1988 | 1988 | 1983 | 1998 | 1975 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 7.3 | 15.8 | 29.3 | 43.4 | 61.2 | 72.5 | 72.1 | 72.9 | 63.8 | 53.1 | 29.6 | 8.6 | 7.3 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1996 | 1982 | 1992 | 1992 | 1993 | 1972 | 1991 | 1983 | 1977 |
| Mean Temperature (F) | 9.2 | 15.8 | 28.6 | 42.9 | 56.3 | 65.8 | 69.4 | 66.7 | 57.6 | 46.3 | 29.3 | 14.8 | 41.9 |
| Highest Mean Temperature (F) | 25.7 | 30.4 | 38.8 | 50.4 | 64.2 | 70.8 | 73.9 | 73.2 | 63.9 | 51.6 | 39.6 | 26.5 | 73.9 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1991 | 1999 | 1995 | 1978 | 1973 | 1999 | 1997 | 1999 |
| Lowest Mean Temperature (F) | -3.8 | 2.9 | 19.1 | 35.5 | 50.9 | 59.1 | 63.2 | 63.0 | 53.2 | 38.3 | 20.9 | -1.5 | -3.8 |
| Year Lowest Occurred | 1982 | 1989 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1988 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -1.1 | 5.4 | 18.7 | 31.0 | 44.8 | 54.7 | 58.3 | 55.6 | 45.3 | 34.3 | 19.9 | 5.5 | 31.0 |
| Highest Mean Min. Temperature (F) | 16.5 | 23.8 | 29.2 | 38.6 | 53.1 | 61.4 | 64.1 | 63.8 | 52.2 | 40.9 | 27.0 | 20.1 | 64.1 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1991 | 1983 | 1995 | 1978 | 1994 | 1999 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -16.4 | -13.2 | 7.3 | 23.3 | 39.9 | 45.8 | 52.7 | 50.8 | 38.4 | 22.1 | 12.0 | -11.7 | -16.4 |
| Year Lowest Occurred | 1982 | 1989 | 1989 | 1989 | 1997 | 1982 | 1989 | 1987 | 1989 | 1988 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.76 | 0.52 | 1.62 | 2.34 | 3.40 | 4.42 | 3.86 | 4.68 | 2.97 | 2.14 | 1.71 | 0.77 | 29.19 |
| Highest Precipitation (in.) | 4.00 | 1.78 | 4.26 | 5.44 | 7.69 | 9.17 | 8.48 | 7.50 | 6.80 | 4.83 | 4.99 | 2.45 | 9.17 |
| Year Highest Occurred | 1996 | 1981 | 1998 | 1986 | 1999 | 1990 | 1997 | 1981 | 1992 | 1984 | 1996 | 1996 | 1990 |
| Lowest Precipitation (in.) | 0.03 | 0.00 | 0.16 | 0.12 | 0.53 | 0.29 | 0.97 | 1.64 | 0.21 | 0.19 | 0.09 | 0.00 | 0.00 |
| Year Lowest Occurred | 1981 | 1997 | 1997 | 1987 | 1988 | 1988 | 1980 | 1990 | 2000 | 1987 | 1980 | 1997 | 1997 |
| Heating Degree Days (F) | 1733. | 1378. | 1127. | 663. | 299. | 71. | 23. | 60. | 241. | 582. | 1071. | 1557. | 8805. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 30. | 95. | 159. | 114. | 18. | 0. | 0. | 0. | 416. |