KENNEWICK, WASHINGTON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 40.4 47.9 58.0 66.2 74.1 81.6 89.3 88.9 79.5 66.3 50.4 41.1 65.3
Highest Mean Max. Temperature (F) 48.6 54.2 62.4 71.2 79.6 87.6 97.0 93.5 85.8 72.5 56.1 48.5 97.0
Year Highest Occurred 1999 1991 1992 1987 1992 1992 1998 1977 1990 1988 1990 1974 1998
Lowest Mean Max. Temperature (F) 23.9 34.4 51.4 61.6 65.9 75.9 80.9 84.4 72.9 63.4 36.3 27.3 23.9
Year Lowest Occurred 1979 1989 1993 1975 1977 1991 1993 1976 1985 1984 1985 1985 1979
Mean Temperature (F) 34.2 39.6 47.2 54.3 61.7 68.7 75.2 74.7 65.7 54.1 43.1 35.2 54.5
Highest Mean Temperature (F) 42.8 44.1 51.0 58.9 66.1 73.8 82.1 79.5 70.9 60.0 48.5 41.5 82.1
Year Highest Occurred 1990 1991 1983 1987 1993 1992 1998 1977 1990 1988 1990 1999 1998
Lowest Mean Temperature (F) 18.5 26.9 42.2 49.5 56.5 64.5 69.1 70.5 60.5 50.2 29.7 23.1 18.5
Year Lowest Occurred 1979 1989 1993 1982 1977 1991 1993 1995 1985 1984 1985 1985 1979
Mean Min. Temperature (F) 28.0 31.3 36.4 42.3 49.2 55.8 61.0 60.5 51.8 41.9 35.7 29.3 43.6
Highest Mean Min. Temperature (F) 37.4 36.0 41.0 46.6 53.8 60.0 67.2 65.5 56.8 47.6 41.4 36.1 67.2
Year Highest Occurred 1990 1983 1983 1987 1987 1992 1998 1977 1998 1988 1998 1999 1998
Lowest Mean Min. Temperature (F) 13.2 19.3 32.7 36.0 45.5 50.8 57.3 56.0 48.1 37.1 23.0 19.0 13.2
Year Lowest Occurred 1979 1989 1985 1982 1982 1976 1993 1995 1985 1984 1985 1985 1979
Mean Precipitation (in.) 1.05 0.79 0.77 0.52 0.65 0.38 0.25 0.39 0.37 0.60 1.08 1.16 8.01
Highest Precipitation (in.) 2.26 1.60 1.73 1.58 1.76 1.21 1.50 1.67 1.63 1.90 2.91 3.47 3.47
Year Highest Occurred 1980 2000 1984 1993 1980 1971 1992 1977 1980 1982 1973 1973 1973
Lowest Precipitation (in.) 0.23 0.02 0.03 0.00 0.03 0.00 0.00 0.00 0.00 0.00 0.09 0.17 0.00
Year Lowest Occurred 1984 1988 1994 1973 1992 1986 1989 2000 1999 1987 1976 1999 1973
Heating Degree Days (F) 954. 712. 552. 326. 142. 32. 5. 4. 81. 340. 659. 924. 4731.
Cooling Degree Days (F) 0. 0. 0. 3. 39. 142. 318. 305. 101. 1. 0. 0. 909.

Western Regional Climate Center, wrcc@dri.edu