SEDRO WOOLLEY 1 E, WASHINGTON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 45.8 49.6 54.0 59.2 65.0 69.6 74.3 75.4 70.1 60.7 50.8 45.5 60.0
Highest Mean Max. Temperature (F) 52.1 55.2 59.4 62.6 69.8 74.9 81.6 79.2 76.1 66.3 55.2 50.0 81.6
Year Highest Occurred 1981 1977 1992 1992 1993 1992 1985 1971 1974 1987 1997 1979 1985
Lowest Mean Max. Temperature (F) 40.3 42.0 49.3 55.3 60.3 65.5 70.0 69.4 65.5 58.0 39.9 39.5 39.5
Year Lowest Occurred 1993 1989 1976 1972 1996 1991 1993 1976 1996 1990 1985 1990 1990
Mean Temperature (F) 39.1 41.8 45.6 49.9 55.1 59.3 62.8 63.5 58.9 51.2 43.9 39.3 50.9
Highest Mean Temperature (F) 45.3 46.6 49.4 53.0 59.9 63.0 66.3 66.5 62.3 53.8 48.8 44.0 66.5
Year Highest Occurred 1986 1991 1986 1992 1993 1992 1985 1997 1974 1993 1997 1979 1997
Lowest Mean Temperature (F) 32.3 34.0 41.3 45.8 51.6 56.2 60.3 59.9 54.9 48.3 32.7 33.2 32.3
Year Lowest Occurred 1979 1989 1976 1975 1999 1976 1986 1973 1972 1972 1985 1990 1979
Mean Min. Temperature (F) 32.4 34.0 37.1 40.5 45.1 49.0 51.3 51.5 47.7 41.7 36.9 33.0 41.7
Highest Mean Min. Temperature (F) 38.6 40.8 41.1 44.9 49.9 51.7 53.5 55.6 52.3 46.1 42.4 38.0 55.6
Year Highest Occurred 1994 1998 1986 1996 1993 1997 1992 1997 1997 1988 1997 1979 1997
Lowest Mean Min. Temperature (F) 24.1 25.9 32.9 35.3 39.5 45.4 47.8 47.7 43.8 36.3 25.4 27.0 24.1
Year Lowest Occurred 1979 1989 1971 1999 1999 1976 1999 1973 1972 1999 1985 1990 1979
Mean Precipitation (in.) 5.77 4.11 4.15 3.76 3.03 2.85 1.77 1.62 2.68 3.97 6.88 5.97 46.56
Highest Precipitation (in.) 15.80 7.46 7.66 7.64 6.74 7.44 3.67 3.71 7.97 9.90 16.50 10.10 16.50
Year Highest Occurred 1971 1982 1989 1981 1996 1990 1983 1991 1978 1985 1990 1979 1990
Lowest Precipitation (in.) 0.88 0.56 1.11 1.92 0.52 0.57 0.00 0.07 0.14 0.25 2.30 1.13 0.00
Year Lowest Occurred 1985 1993 1992 1998 1994 1996 1985 1986 1989 1987 1979 1985 1985
Heating Degree Days (F) 803. 649. 602. 454. 309. 176. 89. 80. 190. 428. 635. 798. 5213.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 5. 21. 32. 7. 0. 0. 0. 65.

Western Regional Climate Center, wrcc@dri.edu