HATTON 9 SE, WASHINGTON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 36.8 44.4 54.2 63.0 71.9 80.2 88.1 87.2 77.6 63.3 45.7 36.4 62.4
Highest Mean Max. Temperature (F) 49.6 51.8 61.5 70.0 79.8 87.5 95.0 93.2 85.3 70.4 52.8 43.1 95.0
Year Highest Occurred 1994 1991 1992 1977 1992 1992 1985 1971 1990 1988 1999 1979 1985
Lowest Mean Max. Temperature (F) 21.3 32.3 47.9 57.0 66.4 74.9 79.8 81.9 68.0 59.1 30.1 21.1 21.1
Year Lowest Occurred 1979 1989 1971 1975 1996 1971 1993 1989 1985 1984 1985 1985 1985
Mean Temperature (F) 31.1 37.1 44.4 51.2 58.9 66.2 73.0 72.3 63.5 51.4 39.2 31.1 51.6
Highest Mean Temperature (F) 43.0 43.5 49.3 55.9 63.4 72.0 78.9 76.8 69.5 57.4 45.2 37.4 78.9
Year Highest Occurred 1994 1991 1992 1977 1993 1992 1985 1986 1990 1988 1987 1979 1985
Lowest Mean Temperature (F) 13.6 25.2 40.1 46.1 54.3 61.7 67.4 67.0 56.7 48.1 24.4 17.5 13.6
Year Lowest Occurred 1979 1989 1971 1975 1984 1991 1993 1980 1985 1984 1985 1985 1979
Mean Min. Temperature (F) 25.3 29.8 34.5 39.3 45.9 52.1 57.8 57.3 49.3 39.4 32.7 25.8 40.8
Highest Mean Min. Temperature (F) 36.4 35.3 38.4 42.9 49.8 56.9 62.9 62.2 53.9 44.4 37.9 32.4 62.9
Year Highest Occurred 1994 1991 1986 1988 1997 1977 1985 1977 1998 1988 1987 1993 1985
Lowest Mean Min. Temperature (F) 5.9 18.2 30.4 34.7 40.6 48.4 53.4 51.4 44.9 35.0 18.6 13.8 5.9
Year Lowest Occurred 1979 1989 1976 1982 1999 1991 1986 1980 1983 1976 1985 1985 1979
Mean Precipitation (in.) 1.09 0.96 1.10 0.81 0.92 0.57 0.38 0.43 0.54 0.81 1.36 1.44 10.41
Highest Precipitation (in.) 2.25 1.83 2.54 1.85 2.06 2.10 1.24 1.78 1.25 2.15 3.28 3.84 3.84
Year Highest Occurred 1986 1999 1989 1992 1980 1995 1992 1977 1980 1996 1973 1973 1973
Lowest Precipitation (in.) 0.26 0.05 0.12 0.10 0.16 0.00 0.01 0.00 0.00 0.00 0.17 0.08 0.00
Year Lowest Occurred 1977 1988 1994 1977 1985 1986 1973 1997 1999 1987 1993 2000 1986
Heating Degree Days (F) 1052. 781. 640. 417. 210. 69. 14. 17. 135. 425. 774. 1050. 5584.
Cooling Degree Days (F) 0. 0. 0. 1. 20. 105. 261. 242. 88. 1. 0. 0. 718.

Western Regional Climate Center, wrcc@dri.edu