ELWHA RS, WASHINGTON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 40.5 43.9 49.8 55.8 62.2 66.6 72.2 73.5 67.4 56.2 45.6 41.0 56.2
Highest Mean Max. Temperature (F) 45.5 48.9 56.8 60.6 69.2 73.1 81.3 81.8 73.1 64.5 51.4 45.3 81.8
Year Highest Occurred 1981 1991 1992 1989 1995 1992 1985 1986 1998 1987 1976 1979 1986
Lowest Mean Max. Temperature (F) 34.2 33.8 43.8 49.3 58.7 60.8 61.5 66.8 61.5 52.4 37.5 35.5 33.8
Year Lowest Occurred 1979 1989 1989 1972 1977 1971 1986 1975 1978 1982 1985 1983 1989
Mean Temperature (F) 35.6 38.0 42.0 46.5 51.9 56.3 60.8 61.9 57.0 48.1 40.1 36.1 47.9
Highest Mean Temperature (F) 40.1 42.6 47.4 49.8 56.7 61.1 66.4 67.6 61.4 51.7 43.7 40.4 67.6
Year Highest Occurred 1994 1991 1992 1989 1995 1992 1985 1986 1998 1987 1981 1979 1986
Lowest Mean Temperature (F) 29.7 28.7 38.0 40.4 48.9 52.4 55.0 57.5 53.2 45.3 31.8 29.6 28.7
Year Lowest Occurred 1993 1989 1976 1972 1974 1976 1986 1975 1972 1984 1985 1983 1989
Mean Min. Temperature (F) 30.6 32.1 34.1 37.2 41.5 46.0 49.3 50.2 46.5 39.9 34.6 31.1 39.4
Highest Mean Min. Temperature (F) 35.2 36.4 38.0 41.0 46.5 49.0 53.9 53.7 49.7 44.0 38.5 35.4 53.9
Year Highest Occurred 1994 1991 1992 1994 1993 1992 1998 1997 1997 1993 1998 1979 1998
Lowest Mean Min. Temperature (F) 25.0 23.6 29.1 31.6 37.5 41.4 44.7 45.4 41.7 36.8 26.0 23.7 23.6
Year Lowest Occurred 1993 1989 1982 1972 1972 1976 1977 1973 1972 1977 1985 1983 1989
Mean Precipitation (in.) 8.62 7.15 6.05 3.25 1.92 1.25 0.83 1.22 1.64 4.85 9.41 9.41 55.60
Highest Precipitation (in.) 17.30 20.53 14.45 7.39 3.89 3.02 2.11 5.81 5.19 12.12 19.00 20.01 20.53
Year Highest Occurred 1992 1999 1971 1982 1984 1997 1997 1975 1997 1985 1983 1979 1999
Lowest Precipitation (in.) 0.70 0.45 1.15 0.55 0.31 0.34 0.09 0.00 0.02 0.15 0.80 1.96 0.00
Year Lowest Occurred 1985 1993 1992 1998 1995 1987 1984 1986 1975 1987 1976 1985 1986
Heating Degree Days (F) 914. 756. 715. 555. 407. 266. 164. 133. 250. 526. 747. 899. 6332.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 5. 31. 35. 8. 0. 0. 0. 79.

Western Regional Climate Center, wrcc@dri.edu