| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 21.2 | 27.6 | 38.6 | 53.4 | 67.0 | 75.1 | 79.5 | 76.8 | 67.4 | 56.1 | 40.0 | 26.2 | 52.4 |
| Highest Mean Max. Temperature (F) | 30.7 | 38.0 | 48.2 | 62.4 | 75.6 | 82.0 | 84.7 | 81.8 | 74.6 | 62.4 | 49.9 | 34.1 | 84.7 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 11.3 | 18.3 | 30.9 | 46.5 | 59.5 | 67.8 | 72.1 | 73.5 | 62.8 | 48.6 | 32.0 | 13.4 | 11.3 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1973 | 1997 | 1982 | 1992 | 1997 | 1993 | 1988 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 10.4 | 16.1 | 27.9 | 41.9 | 54.1 | 62.6 | 67.4 | 65.1 | 55.6 | 44.3 | 30.7 | 17.2 | 41.1 |
| Highest Mean Temperature (F) | 19.9 | 29.3 | 37.1 | 47.9 | 61.3 | 67.4 | 71.4 | 70.3 | 61.3 | 52.4 | 37.9 | 25.1 | 71.4 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1995 | 1988 | 1995 | 1998 | 1971 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -0.3 | 5.0 | 21.2 | 35.6 | 48.3 | 55.4 | 61.6 | 61.1 | 50.8 | 37.8 | 23.3 | 5.4 | -0.3 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1997 | 1982 | 1992 | 1977 | 1974 | 1988 | 1995 | 1983 | 1977 |
| Mean Min. Temperature (F) | -0.5 | 4.6 | 17.2 | 30.3 | 41.2 | 50.1 | 55.2 | 53.3 | 43.8 | 32.5 | 21.4 | 8.2 | 29.8 |
| Highest Mean Min. Temperature (F) | 10.7 | 20.5 | 27.2 | 35.0 | 48.2 | 54.5 | 59.5 | 60.7 | 48.0 | 42.7 | 27.3 | 18.1 | 60.7 |
| Year Highest Occurred | 1992 | 1998 | 1973 | 1986 | 1991 | 1991 | 1987 | 1995 | 1998 | 1971 | 1998 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -11.8 | -8.2 | 8.5 | 24.2 | 35.9 | 43.1 | 51.0 | 48.4 | 37.6 | 25.9 | 12.7 | -4.9 | -11.8 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1971 | 1982 | 1992 | 1977 | 1974 | 1976 | 1976 | 1976 | 1977 |
| Mean Precipitation (in.) | 0.97 | 0.90 | 1.73 | 2.85 | 3.55 | 3.75 | 3.94 | 4.17 | 3.78 | 2.47 | 2.04 | 1.36 | 31.51 |
| Highest Precipitation (in.) | 3.22 | 2.87 | 4.67 | 5.37 | 8.07 | 7.86 | 9.98 | 9.51 | 8.49 | 6.67 | 5.23 | 2.88 | 9.98 |
| Year Highest Occurred | 1996 | 1971 | 1977 | 1991 | 1973 | 1996 | 1982 | 1995 | 1986 | 1984 | 1985 | 1977 | 1982 |
| Lowest Precipitation (in.) | 0.09 | 0.02 | 0.20 | 0.40 | 1.11 | 0.84 | 1.22 | 1.08 | 0.68 | 0.09 | 0.00 | 0.04 | 0.00 |
| Year Lowest Occurred | 1981 | 1987 | 1999 | 1989 | 1996 | 1976 | 1981 | 1999 | 1979 | 2000 | 1976 | 1994 | 1976 |
| Heating Degree Days (F) | 1696. | 1369. | 1149. | 694. | 357. | 131. | 45. | 82. | 288. | 641. | 1028. | 1481. | 8961. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 18. | 59. | 118. | 83. | 6. | 0. | 0. | 0. | 284. |