KNOXVILLE WSO AIRPORT, TENNESSEE

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 46.3 51.7 60.3 69.0 76.3 83.6 86.9 86.4 80.7 69.9 59.0 49.8 68.3
Highest Mean Max. Temperature (F) 56.0 60.3 65.1 73.5 82.1 88.1 93.9 91.7 88.4 77.6 65.5 58.2 93.9
Year Highest Occurred 1974 1976 1973 1977 1987 1988 1993 1995 1998 1984 1985 1984 1993
Lowest Mean Max. Temperature (F) 34.8 42.1 53.5 63.3 72.4 78.3 80.2 81.6 77.0 63.7 51.8 39.9 34.8
Year Lowest Occurred 1977 1978 1993 1983 1989 1974 1979 1992 1976 1976 1997 1989 1977
Mean Temperature (F) 37.6 41.8 49.7 57.8 66.0 73.8 77.7 76.9 70.8 58.8 49.0 40.9 58.4
Highest Mean Temperature (F) 48.9 48.4 55.5 62.7 71.2 76.5 82.3 81.1 76.0 67.1 56.3 50.2 82.3
Year Highest Occurred 1974 1990 1973 1981 1991 1986 1993 1980 1998 1984 1985 1971 1993
Lowest Mean Temperature (F) 26.8 34.1 44.8 52.5 61.6 69.7 74.3 73.1 66.6 52.2 42.7 31.8 26.8
Year Lowest Occurred 1977 1978 1996 1983 1989 1974 1979 1992 1984 1988 1976 1989 1977
Mean Min. Temperature (F) 28.9 31.8 39.1 46.6 55.6 63.9 68.5 67.3 60.8 47.7 38.9 31.9 48.4
Highest Mean Min. Temperature (F) 41.9 38.2 45.8 52.3 61.5 68.1 72.2 71.1 66.0 56.6 47.0 42.3 72.2
Year Highest Occurred 1974 1998 1973 1981 1991 1981 1981 1980 1977 1984 1985 1971 1981
Lowest Mean Min. Temperature (F) 18.9 26.2 33.7 41.6 50.3 59.2 66.0 64.0 53.4 37.0 33.0 23.6 18.9
Year Lowest Occurred 1977 1978 1986 1983 1988 1988 1985 1976 1984 1987 1976 1989 1977
Mean Precipitation (in.) 4.57 4.01 5.17 3.99 4.68 4.04 4.71 2.89 3.04 2.65 3.98 4.49 48.22
Highest Precipitation (in.) 7.53 8.81 11.81 11.07 10.98 8.21 12.66 6.13 9.19 5.99 7.71 10.23 12.66
Year Highest Occurred 1996 1994 1994 1998 1974 1989 1999 1991 1989 1972 1996 1991 1999
Lowest Precipitation (in.) 0.95 1.01 1.69 0.39 1.16 0.51 0.33 0.85 0.42 0.00 1.21 1.70 0.00
Year Lowest Occurred 1986 1978 1986 1976 1977 1988 1995 1999 1985 2000 1987 1999 2000
Heating Degree Days (F) 841. 652. 467. 227. 65. 3. 0. 0. 22. 210. 470. 733. 3690.
Cooling Degree Days (F) 0. 1. 5. 27. 110. 282. 408. 381. 205. 28. 3. 0. 1450.

Southeast Regional Climate Center, sercc@climate.ncsu.edu