| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 37.3 | 43.3 | 50.6 | 57.4 | 65.6 | 72.9 | 82.5 | 83.4 | 74.1 | 61.6 | 45.7 | 38.0 | 59.4 |
| Highest Mean Max. Temperature (F) | 44.6 | 51.3 | 58.2 | 65.6 | 73.5 | 79.7 | 87.5 | 90.0 | 82.9 | 71.6 | 57.3 | 44.3 | 90.0 |
| Year Highest Occurred | 1998 | 1992 | 1992 | 1987 | 1992 | 1986 | 1985 | 1998 | 1990 | 1999 | 1999 | 1989 | 1998 |
| Lowest Mean Max. Temperature (F) | 26.0 | 31.6 | 44.7 | 48.8 | 59.2 | 66.9 | 70.0 | 76.0 | 64.6 | 55.3 | 33.2 | 28.7 | 26.0 |
| Year Lowest Occurred | 1979 | 1989 | 1975 | 1975 | 1991 | 1994 | 1993 | 1976 | 1985 | 1984 | 1985 | 1985 | 1979 |
| Mean Temperature (F) | 29.4 | 33.9 | 39.9 | 45.6 | 52.6 | 59.0 | 66.1 | 66.4 | 58.5 | 48.8 | 37.2 | 30.4 | 47.3 |
| Highest Mean Temperature (F) | 35.7 | 41.1 | 44.7 | 51.0 | 57.5 | 64.2 | 70.6 | 71.9 | 65.4 | 56.1 | 47.0 | 36.3 | 71.9 |
| Year Highest Occurred | 1994 | 1992 | 1992 | 1987 | 1993 | 1992 | 1998 | 1999 | 1998 | 1988 | 1999 | 1973 | 1999 |
| Lowest Mean Temperature (F) | 16.2 | 21.6 | 34.8 | 39.1 | 48.2 | 54.4 | 58.4 | 61.4 | 52.3 | 45.1 | 24.9 | 20.1 | 16.2 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1975 | 1977 | 1994 | 1993 | 1980 | 1985 | 1984 | 1985 | 1985 | 1979 |
| Mean Min. Temperature (F) | 21.5 | 24.5 | 29.1 | 33.7 | 39.5 | 45.0 | 49.6 | 49.4 | 42.9 | 35.9 | 28.7 | 22.8 | 35.2 |
| Highest Mean Min. Temperature (F) | 27.8 | 30.8 | 33.4 | 37.1 | 44.7 | 50.6 | 54.3 | 55.3 | 48.2 | 41.0 | 36.6 | 29.8 | 55.3 |
| Year Highest Occurred | 1994 | 1992 | 1986 | 1994 | 1993 | 1992 | 1998 | 1999 | 1998 | 1988 | 1999 | 1973 | 1999 |
| Lowest Mean Min. Temperature (F) | 6.4 | 11.6 | 24.1 | 29.3 | 36.6 | 41.9 | 46.1 | 44.6 | 37.6 | 32.8 | 16.6 | 11.4 | 6.4 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1975 | 1977 | 1994 | 1986 | 1980 | 1971 | 1987 | 1985 | 1985 | 1979 |
| Mean Precipitation (in.) | 2.17 | 1.86 | 1.87 | 2.41 | 2.90 | 2.21 | 0.77 | 0.91 | 1.16 | 1.66 | 2.75 | 2.14 | 22.81 |
| Highest Precipitation (in.) | 3.69 | 4.50 | 3.91 | 5.66 | 7.60 | 4.14 | 2.84 | 3.32 | 4.03 | 3.60 | 6.23 | 4.63 | 7.60 |
| Year Highest Occurred | 1993 | 1986 | 1983 | 1978 | 1998 | 1993 | 1997 | 1989 | 1973 | 1975 | 1973 | 1996 | 1998 |
| Lowest Precipitation (in.) | 0.38 | 0.26 | 0.48 | 0.58 | 0.53 | 0.85 | 0.05 | 0.00 | 0.00 | 0.01 | 0.81 | 0.50 | 0.00 |
| Year Lowest Occurred | 1985 | 1973 | 1994 | 1977 | 1992 | 1999 | 1999 | 1994 | 1993 | 1987 | 1976 | 1986 | 1994 |
| Heating Degree Days (F) | 1104. | 871. | 780. | 584. | 388. | 203. | 68. | 73. | 231. | 503. | 834. | 1074. | 6713. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 1. | 21. | 101. | 117. | 37. | 0. | 0. | 0. | 277. |