DUTCH HARBOR, ALASKA

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 36.6 36.6 38.3 40.6 45.5 51.2 56.9 58.6 54.1 47.5 42.6 38.3 45.6
Highest Mean Max. Temperature (F) 43.7 42.9 44.4 45.6 50.5 54.8 59.9 63.1 58.1 50.9 46.4 44.8 63.1
Year Highest Occurred 1977 1977 1996 1979 1981 1996 1977 1997 1993 1979 1993 1990 1997
Lowest Mean Max. Temperature (F) 28.7 28.4 27.2 35.5 38.7 46.8 53.5 55.1 49.9 44.8 36.6 32.3 27.2
Year Lowest Occurred 1971 1984 1972 1972 1971 1972 1982 1982 1982 1982 1975 1999 1972
Mean Temperature (F) 31.5 31.2 32.7 35.4 40.7 45.8 50.9 52.5 48.2 42.0 37.1 33.5 40.1
Highest Mean Temperature (F) 39.8 38.4 38.8 41.0 45.2 48.5 53.0 57.1 50.8 46.3 41.0 39.7 57.1
Year Highest Occurred 1977 1977 1996 1979 1981 1996 1989 1997 1979 1979 1978 1990 1997
Lowest Mean Temperature (F) 23.5 23.2 20.1 28.7 34.6 41.7 48.2 50.0 45.7 39.3 31.0 26.0 20.1
Year Lowest Occurred 1971 1984 1972 1972 1971 1971 1971 1985 1971 1992 1975 1999 1972
Mean Min. Temperature (F) 26.4 25.8 27.1 30.2 35.9 40.4 44.8 46.3 42.2 36.4 31.6 28.6 34.6
Highest Mean Min. Temperature (F) 35.8 33.8 33.8 36.4 39.8 44.1 47.7 51.1 46.6 41.6 36.0 36.4 51.1
Year Highest Occurred 1977 1977 1981 1979 1981 1983 1984 1997 1984 1979 1986 1984 1997
Lowest Mean Min. Temperature (F) 18.3 17.7 12.9 21.8 30.4 36.4 40.7 42.6 38.4 32.1 25.4 19.6 12.9
Year Lowest Occurred 1971 1972 1972 1972 1971 1971 1971 1985 1991 1992 1975 1999 1972
Mean Precipitation (in.) 6.77 5.85 6.05 3.00 3.37 2.62 2.03 2.63 5.34 6.30 6.56 6.79 57.31
Highest Precipitation (in.) 17.02 14.04 14.81 6.27 10.28 6.30 5.15 6.23 9.98 9.76 19.64 19.09 19.64
Year Highest Occurred 1991 1991 1999 1999 1991 1980 1993 1997 1990 1994 2000 1994 2000
Lowest Precipitation (in.) 1.95 1.37 2.11 0.57 0.07 0.12 0.20 0.05 0.84 1.37 1.07 2.05 0.05
Year Lowest Occurred 1987 1979 2000 1985 1987 1987 1986 1987 1988 1982 1986 1985 1987
Heating Degree Days (F) 1038. 946. 987. 889. 754. 576. 438. 389. 505. 715. 837. 978. 9052.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.

Western Regional Climate Center, wrcc@dri.edu