| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 20.9 | 26.9 | 36.7 | 49.8 | 63.6 | 72.2 | 77.0 | 75.2 | 66.0 | 54.5 | 38.3 | 25.8 | 50.6 |
| Highest Mean Max. Temperature (F) | 31.1 | 38.0 | 44.9 | 59.1 | 70.4 | 78.0 | 83.6 | 80.9 | 71.8 | 60.8 | 47.1 | 33.3 | 83.6 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1987 | 1988 | 1983 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Max. Temperature (F) | 10.8 | 16.9 | 29.1 | 42.7 | 54.9 | 66.9 | 69.4 | 71.0 | 60.3 | 49.3 | 30.3 | 17.0 | 10.8 |
| Year Lowest Occurred | 1994 | 1979 | 1996 | 1975 | 1997 | 1993 | 1992 | 1977 | 1993 | 1987 | 1995 | 1989 | 1994 |
| Mean Temperature (F) | 12.1 | 16.9 | 27.1 | 39.7 | 51.7 | 60.5 | 66.3 | 65.1 | 56.2 | 45.3 | 31.0 | 18.2 | 40.8 |
| Highest Mean Temperature (F) | 21.2 | 31.5 | 34.9 | 46.2 | 57.1 | 64.7 | 70.8 | 70.0 | 61.1 | 51.1 | 38.5 | 27.1 | 70.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1987 | 1988 | 1983 | 1998 | 1971 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | 2.1 | 4.8 | 19.4 | 34.4 | 45.5 | 56.1 | 59.8 | 60.7 | 51.1 | 40.4 | 24.2 | 8.3 | 2.1 |
| Year Lowest Occurred | 1977 | 1979 | 1972 | 1975 | 1997 | 1982 | 1992 | 1977 | 1993 | 1976 | 1995 | 1976 | 1977 |
| Mean Min. Temperature (F) | 3.2 | 6.9 | 17.5 | 29.5 | 39.8 | 48.7 | 55.6 | 55.0 | 46.3 | 36.1 | 23.7 | 10.6 | 31.1 |
| Highest Mean Min. Temperature (F) | 14.3 | 24.9 | 24.9 | 33.8 | 43.8 | 52.5 | 60.3 | 59.2 | 51.1 | 42.6 | 29.9 | 20.9 | 60.3 |
| Year Highest Occurred | 1998 | 1998 | 2000 | 1991 | 1977 | 1999 | 1999 | 1998 | 1994 | 1971 | 1999 | 1997 | 1999 |
| Lowest Mean Min. Temperature (F) | -8.5 | -7.3 | 9.7 | 25.3 | 35.6 | 44.6 | 50.1 | 50.3 | 41.4 | 31.0 | 17.8 | -1.7 | -8.5 |
| Year Lowest Occurred | 1982 | 1979 | 1972 | 1972 | 1983 | 1982 | 1992 | 1977 | 1974 | 1976 | 1985 | 1976 | 1982 |
| Mean Precipitation (in.) | 1.78 | 0.97 | 2.20 | 2.25 | 3.18 | 3.84 | 4.06 | 3.99 | 3.78 | 2.82 | 2.86 | 1.73 | 33.46 |
| Highest Precipitation (in.) | 3.00 | 3.03 | 7.05 | 5.51 | 6.56 | 6.70 | 9.90 | 11.25 | 9.03 | 5.94 | 8.12 | 3.33 | 11.25 |
| Year Highest Occurred | 1982 | 1981 | 1977 | 1994 | 1985 | 1984 | 1991 | 1972 | 1985 | 1995 | 1991 | 1996 | 1972 |
| Lowest Precipitation (in.) | 0.52 | 0.21 | 0.42 | 0.25 | 0.49 | 1.11 | 0.74 | 1.32 | 1.38 | 0.40 | 0.57 | 0.65 | 0.21 |
| Year Lowest Occurred | 1981 | 1982 | 1999 | 1988 | 1990 | 1995 | 1988 | 1996 | 1976 | 1976 | 1984 | 1994 | 1982 |
| Heating Degree Days (F) | 1641. | 1347. | 1177. | 759. | 416. | 156. | 61. | 76. | 272. | 611. | 1020. | 1451. | 8987. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 4. | 19. | 102. | 80. | 6. | 0. | 0. | 0. | 211. |