COUPEVILLE 1 S, WASHINGTON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 45.4 48.6 52.6 57.3 62.6 66.8 71.1 72.1 67.6 58.3 49.9 45.1 58.1
Highest Mean Max. Temperature (F) 51.0 53.0 56.5 60.8 66.6 71.8 75.4 76.4 73.6 62.3 53.7 49.3 76.4
Year Highest Occurred 1986 1977 1981 1989 1993 1978 1985 1971 1974 1987 1987 1979 1971
Lowest Mean Max. Temperature (F) 40.5 41.7 48.3 54.1 58.8 62.8 67.5 66.9 62.2 54.9 40.1 39.5 39.5
Year Lowest Occurred 1979 1989 1976 1972 1996 1991 1986 1976 1996 1996 1985 1983 1983
Mean Temperature (F) 40.1 42.1 45.1 48.9 53.7 57.6 61.0 61.6 57.4 50.3 44.1 40.1 50.2
Highest Mean Temperature (F) 45.2 46.1 48.0 51.2 57.7 60.5 65.3 63.7 59.9 52.2 47.8 45.3 65.3
Year Highest Occurred 1986 1991 1983 1989 1993 1992 1998 1977 1979 2000 1995 1979 1998
Lowest Mean Temperature (F) 33.5 34.4 41.2 45.8 51.1 55.1 59.0 58.9 54.3 47.7 34.2 33.6 33.5
Year Lowest Occurred 1979 1989 1976 1972 1996 1976 1986 1976 1972 1972 1985 1983 1979
Mean Min. Temperature (F) 34.7 35.6 37.6 40.4 44.7 48.3 50.8 51.0 47.1 42.2 38.2 35.0 42.1
Highest Mean Min. Temperature (F) 39.4 41.2 41.1 43.3 48.8 51.5 56.7 53.7 51.0 46.1 43.4 41.3 56.7
Year Highest Occurred 1986 1998 1998 1996 1993 1998 1998 1997 1997 1997 1998 1979 1998
Lowest Mean Min. Temperature (F) 26.5 27.1 34.1 36.7 42.1 45.1 47.9 48.7 43.6 38.9 28.2 27.6 26.5
Year Lowest Occurred 1979 1989 1976 1982 1975 1976 1973 1985 1972 1972 1985 1983 1979
Mean Precipitation (in.) 2.50 1.83 1.91 1.66 1.76 1.31 0.99 0.92 1.26 1.69 2.89 2.67 21.39
Highest Precipitation (in.) 7.01 3.70 2.98 3.76 3.55 3.04 2.35 2.67 3.62 4.17 7.55 6.72 7.55
Year Highest Occurred 1971 1999 1998 1972 1984 1980 1974 1975 1983 1985 1995 1971 1995
Lowest Precipitation (in.) 0.34 0.51 0.54 0.21 0.43 0.20 0.02 0.00 0.10 0.08 0.71 0.50 0.00
Year Lowest Occurred 1985 1993 1979 1995 1992 1987 1984 1998 1999 1987 1976 1985 1998
Heating Degree Days (F) 774. 641. 617. 486. 351. 223. 132. 115. 232. 456. 628. 774. 5429.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 0. 6. 7. 2. 0. 0. 0. 15.

Western Regional Climate Center, wrcc@dri.edu