ICE HARBOR DAM, WASHINGTON

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(453883)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201301
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1957 ----- z ----- z 29.00 u 31.00 c 48.00 50.00 47.00 48.00 32.00 31.00 b 22.00 18.00 18.00
1958 17.00 26.00 21.00 33.00 40.00 50.00 50.00 54.00 36.00 21.00 9.00 20.00 9.00
1959 3.00 19.00 25.00 26.00 34.00 43.00 46.00 48.00 37.00 30.00 6.00 16.00 3.00
1960 6.00 8.00 13.00 29.00 37.00 41.00 50.00 45.00 36.00 32.00 23.00 16.00 6.00
1961 17.00 34.00 a 26.00 28.00 40.00 46.00 48.00 52.00 36.00 25.00 12.00 6.00 6.00
1962 3.00 9.00 20.00 a 32.00 a 37.00 41.00 45.00 49.00 38.00 39.00 25.00 15.00 3.00
1963 1.00 11.00 25.00 31.00 40.00 38.00 50.00 53.00 43.00 31.00 21.00 14.00 1.00
1964 22.00 19.00 19.00 28.00 36.00 45.00 50.00 38.00 38.00 26.00 24.00 -5.00 -5.00
1965 14.00 25.00 18.00 34.00 34.00 45.00 53.00 45.00 33.00 35.00 30.00 13.00 13.00
1966 20.00 22.00 19.00 24.00 36.00 42.00 53.00 50.00 43.00 36.00 25.00 25.00 19.00
1967 27.00 25.00 22.00 33.00 39.00 47.00 53.00 51.00 46.00 32.00 19.00 8.00 8.00
1968 15.00 17.00 27.00 30.00 39.00 44.00 51.00 52.00 41.00 33.00 27.00 -14.00 -14.00
1969 -7.00 -4.00 22.00 33.00 38.00 50.00 51.00 48.00 43.00 24.00 25.00 25.00 -7.00
1970 17.00 26.00 25.00 30.00 39.00 45.00 51.00 51.00 37.00 26.00 13.00 15.00 13.00
1971 11.00 18.00 21.00 32.00 36.00 46.00 46.00 49.00 36.00 20.00 18.00 10.00 10.00
1972 -4.00 0.00 27.00 25.00 36.00 46.00 51.00 ----- z 33.00 26.00 27.00 -5.00 -5.00
1973 -1.00 19.00 31.00 26.00 35.00 45.00 49.00 49.00 40.00 36.00 26.00 19.00 -1.00
1974 -5.00 27.00 25.00 31.00 37.00 45.00 50.00 54.00 40.00 31.00 33.00 25.00 -5.00
1975 18.00 17.00 21.00 29.00 37.00 44.00 46.00 49.00 38.00 35.00 20.00 20.00 17.00
1976 19.00 13.00 14.00 29.00 39.00 41.00 47.00 47.00 39.00 25.00 13.00 15.00 13.00
1977 8.00 25.00 30.00 33.00 37.00 42.00 48.00 51.00 42.00 29.00 10.00 14.00 8.00
1978 -7.00 20.00 20.00 33.00 37.00 46.00 51.00 50.00 a 36.00 25.00 10.00 -2.00 -7.00
1979 1.00 d -7.00 24.00 28.00 ----- z 44.00 ----- z 55.00 44.00 38.00 23.00 a 23.00 a -7.00
1980 ----- z ----- z 25.00 29.00 40.00 45.00 52.00 48.00 40.00 27.00 a 31.00 11.00 11.00
1981 24.00 14.00 24.00 32.00 35.00 45.00 47.00 50.00 42.00 a 26.00 b 22.00 17.00 14.00
1982 1.00 13.00 25.00 30.00 35.00 46.00 49.00 55.00 40.00 26.00 21.00 17.00 1.00
1983 23.00 25.00 31.00 30.00 40.00 c 48.00 52.00 56.00 29.00 31.00 21.00 -10.00 -10.00
1984 8.00 25.00 22.00 33.00 ----- z 40.00 49.00 48.00 32.00 25.00 24.00 -2.00 -2.00
1985 10.00 -3.00 24.00 31.00 36.00 45.00 52.00 ----- z 27.00 24.00 ----- z -5.00 a -5.00
1986 20.00 19.00 30.00 22.00 37.00 49.00 49.00 a 48.00 40.00 25.00 18.00 20.00 18.00
1987 9.00 19.00 21.00 36.00 41.00 44.00 53.00 51.00 39.00 30.00 22.00 11.00 9.00
1988 14.00 11.00 24.00 31.00 38.00 47.00 48.00 50.00 37.00 26.00 26.00 12.00 11.00
1989 16.00 -7.00 15.00 31.00 39.00 49.00 52.00 53.00 43.00 29.00 25.00 21.00 -7.00
1990 25.00 5.00 23.00 j 36.00 39.00 45.00 49.00 53.00 47.00 34.00 27.00 -10.00 -10.00
1991 11.00 26.00 26.00 32.00 39.00 40.00 50.00 53.00 ----- z 22.00 25.00 22.00 11.00
1992 24.00 25.00 ----- z 34.00 34.00 48.00 55.00 46.00 38.00 29.00 23.00 17.00 17.00
1993 -1.00 7.00 10.00 k 33.00 42.00 ----- z 52.00 46.00 38.00 32.00 8.00 23.00 -1.00
1994 24.00 4.00 21.00 36.00 ----- z 46.00 53.00 56.00 45.00 33.00 21.00 14.00 4.00
1995 12.00 11.00 17.00 31.00 39.00 46.00 54.00 50.00 39.00 29.00 19.00 18.00 11.00
1996 -14.00 -14.00 19.00 34.00 33.00 43.00 50.00 49.00 31.00 28.00 24.00 -1.00 -14.00
1997 9.00 21.00 29.00 25.00 35.00 48.00 52.00 52.00 42.00 30.00 29.00 22.00 9.00
1998 9.00 29.00 28.00 33.00 42.00 49.00 56.00 50.00 46.00 28.00 33.00 1.00 1.00
1999 22.00 27.00 25.00 26.00 35.00 45.00 49.00 42.00 36.00 26.00 28.00 25.00 22.00
2000 22.00 21.00 30.00 29.00 35.00 43.00 a 51.00 46.00 31.00 29.00 18.00 15.00 15.00
2001 24.00 19.00 23.00 30.00 37.00 44.00 53.00 b 52.00 a 39.00 33.00 26.00 a 21.00 c 19.00
2002 20.00 18.00 22.00 31.00 29.00 41.00 48.00 45.00 40.00 19.00 14.00 26.00 14.00
2003 29.00 16.00 31.00 34.00 36.00 48.00 52.00 51.00 44.00 26.00 13.00 14.00 13.00
2004 -6.00 28.00 28.00 30.00 44.00 47.00 51.00 54.00 44.00 36.00 24.00 22.00 -6.00
2005 9.00 16.00 28.00 ----- z 38.00 48.00 53.00 51.00 39.00 36.00 26.00 10.00 9.00
2006 28.00 i 6.00 23.00 33.00 34.00 50.00 51.00 53.00 42.00 17.00 15.00 15.00 6.00
2007 8.00 18.00 29.00 30.00 40.00 46.00 53.00 51.00 42.00 25.00 23.00 23.00 8.00
2008 5.00 25.00 29.00 26.00 34.00 45.00 51.00 47.00 39.00 28.00 24.00 -1.00 -1.00
2009 10.00 21.00 17.00 29.00 35.00 49.00 50.00 50.00 40.00 22.00 28.00 -1.00 -1.00
2010 21.00 19.00 24.00 25.00 36.00 48.00 51.00 46.00 44.00 34.00 -2.00 13.00 -2.00
2011 10.00 7.00 b 28.00 29.00 b 37.00 c 45.00 a 49.00 52.00 38.00 b 30.00 b 24.00 15.00 7.00
2012 11.00 24.00 b 25.00 30.00 34.00 a 46.00 a 49.00 44.00 ----- z 30.00 ----- z ----- z 11.00
2013 16.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 16.00
Period of Record Statistics
MEAN 11.48 16.00 23.81 30.35 37.34 45.35 50.38 49.74 38.89 28.77 21.13 12.47 4.88
S.D. 10.15 10.39 4.50 3.13 3.06 2.82 2.37 3.55 4.41 4.87 7.13 10.34 9.34
SKEW -0.42 -0.94 -0.36 -0.46 0.62 -0.36 -0.14 -0.69 -0.53 -0.08 -0.95 -0.89 -0.27
MAX 29.00 34.00 31.00 36.00 48.00 50.00 56.00 56.00 47.00 39.00 33.00 26.00 22.00
MIN -14.00 -14.00 13.00 22.00 29.00 38.00 45.00 38.00 27.00 17.00 -2.00 -14.00 -14.00
NO YRS 54 54 52 55 53 55 55 54 54 56 54 55 40