| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.6 | 26.0 | 36.4 | 49.7 | 63.9 | 72.1 | 76.7 | 74.7 | 65.9 | 54.8 | 38.1 | 24.5 | 50.2 |
| Highest Mean Max. Temperature (F) | 30.6 | 39.4 | 44.9 | 55.9 | 74.8 | 78.6 | 83.2 | 80.6 | 73.3 | 61.7 | 46.6 | 32.2 | 83.2 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1977 | 1977 | 1988 | 1988 | 1976 | 1998 | 2000 | 1999 | 1974 | 1988 |
| Lowest Mean Max. Temperature (F) | 9.7 | 17.8 | 27.3 | 42.3 | 55.3 | 66.5 | 70.2 | 70.1 | 60.4 | 48.3 | 28.5 | 13.2 | 9.7 |
| Year Lowest Occurred | 1979 | 1994 | 1996 | 1996 | 1997 | 1982 | 1992 | 1985 | 1993 | 1988 | 1995 | 1983 | 1979 |
| Mean Temperature (F) | 9.6 | 14.8 | 25.6 | 39.0 | 51.8 | 60.3 | 65.5 | 63.6 | 54.8 | 44.4 | 29.9 | 15.9 | 39.6 |
| Highest Mean Temperature (F) | 20.4 | 30.8 | 34.0 | 44.7 | 60.6 | 64.8 | 70.6 | 68.9 | 61.2 | 50.2 | 37.9 | 25.1 | 70.6 |
| Year Highest Occurred | 1987 | 1998 | 2000 | 1991 | 1977 | 1997 | 1983 | 1983 | 1998 | 2000 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -0.8 | 4.8 | 16.9 | 32.5 | 45.1 | 54.2 | 60.2 | 58.7 | 49.1 | 38.5 | 21.1 | 3.8 | -0.8 |
| Year Lowest Occurred | 1977 | 1972 | 1972 | 1996 | 1997 | 1982 | 1992 | 1986 | 1974 | 1988 | 1995 | 1989 | 1977 |
| Mean Min. Temperature (F) | -0.5 | 3.6 | 14.8 | 28.2 | 39.7 | 48.5 | 54.3 | 52.5 | 43.7 | 33.9 | 21.6 | 7.2 | 29.0 |
| Highest Mean Min. Temperature (F) | 11.9 | 23.3 | 23.0 | 33.5 | 46.4 | 52.3 | 59.8 | 57.5 | 49.6 | 39.8 | 29.1 | 18.4 | 59.8 |
| Year Highest Occurred | 1987 | 1998 | 2000 | 1991 | 1977 | 1991 | 1983 | 1995 | 1994 | 1971 | 1999 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -12.1 | -8.5 | 5.6 | 21.7 | 34.9 | 41.8 | 49.5 | 47.0 | 36.5 | 27.1 | 13.3 | -6.3 | -12.1 |
| Year Lowest Occurred | 1977 | 1972 | 1972 | 1975 | 1997 | 1982 | 1985 | 1986 | 1974 | 1976 | 1976 | 1989 | 1977 |
| Mean Precipitation (in.) | 1.81 | 1.15 | 2.00 | 2.08 | 2.96 | 4.03 | 4.19 | 4.18 | 4.04 | 3.43 | 2.79 | 1.74 | 34.40 |
| Highest Precipitation (in.) | 3.46 | 3.13 | 4.75 | 3.76 | 5.82 | 7.48 | 10.66 | 9.74 | 9.08 | 8.07 | 8.55 | 4.02 | 10.66 |
| Year Highest Occurred | 1997 | 1981 | 1976 | 1994 | 1973 | 1979 | 1982 | 1977 | 1985 | 1995 | 1991 | 1996 | 1982 |
| Lowest Precipitation (in.) | 0.62 | 0.08 | 0.47 | 0.53 | 0.70 | 1.19 | 0.71 | 1.42 | 0.84 | 0.91 | 0.42 | 0.27 | 0.08 |
| Year Lowest Occurred | 1995 | 1987 | 1999 | 1988 | 1990 | 1994 | 1989 | 1991 | 1989 | 1976 | 1981 | 1994 | 1987 |
| Heating Degree Days (F) | 1720. | 1405. | 1221. | 782. | 422. | 172. | 76. | 118. | 314. | 640. | 1054. | 1525. | 9449. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 14. | 31. | 91. | 74. | 7. | 0. | 0. | 0. | 217. |