SEATTLE TACOMA INTL AP,

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(457473)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1948 ----- z ----- z ----- z ----- z ----- z 47.00 f 44.00 48.00 37.00 32.00 27.00 16.00 16.00
1949 12.00 18.00 30.00 34.00 36.00 43.00 43.00 48.00 40.00 28.00 35.00 17.00 12.00
1950 0.00 1.00 27.00 30.00 34.00 43.00 47.00 44.00 36.00 34.00 25.00 30.00 0.00
1951 11.00 2.00 24.00 29.00 32.00 40.00 47.00 44.00 40.00 32.00 28.00 16.00 2.00
1952 10.00 26.00 28.00 29.00 33.00 38.00 45.00 44.00 39.00 35.00 17.00 27.00 10.00
1953 26.00 27.00 25.00 29.00 35.00 41.00 43.00 46.00 40.00 32.00 29.00 31.00 25.00
1954 16.00 28.00 24.00 31.00 28.00 42.00 43.00 45.00 37.00 29.00 29.00 27.00 16.00
1955 27.00 21.00 11.00 31.00 38.00 43.00 45.00 44.00 37.00 37.00 6.00 24.00 6.00
1956 17.00 13.00 20.00 31.00 37.00 42.00 46.00 46.00 40.00 32.00 26.00 19.00 13.00
1957 9.00 21.00 33.00 35.00 44.00 47.00 48.00 46.00 40.00 35.00 27.00 32.00 9.00
1958 29.00 31.00 29.00 35.00 39.00 50.00 50.00 52.00 41.00 37.00 25.00 29.00 25.00
1959 14.00 29.00 31.00 34.00 37.00 46.00 48.00 46.00 44.00 34.00 27.00 28.00 14.00
1960 25.00 25.00 24.00 34.00 37.00 43.00 46.00 45.00 39.00 35.00 27.00 25.00 24.00
1961 25.00 34.00 23.00 30.00 38.00 46.00 52.00 51.00 39.00 33.00 23.00 23.00 23.00
1962 13.00 18.00 29.00 36.00 33.00 41.00 48.00 47.00 44.00 38.00 30.00 22.00 13.00
1963 12.00 32.00 28.00 30.00 36.00 46.00 47.00 50.00 45.00 37.00 28.00 25.00 12.00
1964 29.00 28.00 31.00 33.00 35.00 46.00 51.00 47.00 44.00 37.00 30.00 10.00 10.00
1965 29.00 32.00 27.00 34.00 36.00 46.00 49.00 49.00 42.00 40.00 32.00 25.00 25.00
1966 27.00 30.00 29.00 35.00 37.00 46.00 51.00 46.00 46.00 37.00 31.00 29.00 27.00
1967 29.00 30.00 28.00 33.00 42.00 49.00 50.00 52.00 47.00 40.00 31.00 25.00 25.00
1968 25.00 30.00 32.00 33.00 41.00 48.00 50.00 52.00 45.00 40.00 35.00 6.00 6.00
1969 15.00 31.00 32.00 35.00 36.00 49.00 50.00 48.00 43.00 35.00 30.00 33.00 15.00
1970 29.00 33.00 30.00 34.00 38.00 47.00 51.00 52.00 41.00 31.00 27.00 27.00 27.00
1971 24.00 24.00 23.00 33.00 41.00 44.00 47.00 53.00 43.00 30.00 33.00 25.00 23.00
1972 12.00 19.00 31.00 34.00 41.00 49.00 48.00 50.00 35.00 34.00 33.00 13.00 12.00
1973 15.00 29.00 31.00 34.00 40.00 44.00 45.00 46.00 46.00 40.00 31.00 30.00 15.00
1974 16.00 28.00 27.00 37.00 39.00 45.00 49.00 47.00 44.00 35.00 27.00 28.00 16.00
1975 25.00 27.00 26.00 29.00 37.00 43.00 50.00 51.00 47.00 35.00 22.00 27.00 22.00
1976 27.00 24.00 24.00 30.00 42.00 42.00 51.00 52.00 50.00 38.00 29.00 27.00 24.00
1977 24.00 32.00 35.00 37.00 41.00 44.00 52.00 51.00 43.00 41.00 21.00 30.00 21.00
1978 29.00 31.00 30.00 33.00 39.00 47.00 52.00 52.00 43.00 33.00 24.00 13.00 13.00
1979 20.00 25.00 34.00 36.00 43.00 45.00 47.00 51.00 48.00 41.00 28.00 30.00 20.00
1980 15.00 27.00 31.00 35.00 37.00 44.00 49.00 46.00 48.00 35.00 31.00 22.00 15.00
1981 29.00 26.00 34.00 34.00 39.00 44.00 47.00 50.00 44.00 38.00 28.00 31.00 26.00
1982 14.00 24.00 30.00 34.00 39.00 45.00 49.00 49.00 43.00 36.00 29.00 25.00 14.00
1983 29.00 32.00 39.00 36.00 42.00 49.00 50.00 53.00 39.00 37.00 33.00 9.00 9.00
1984 21.00 31.00 33.00 36.00 40.00 46.00 50.00 49.00 42.00 31.00 31.00 20.00 20.00
1985 24.00 19.00 29.00 32.00 36.00 45.00 54.00 49.00 44.00 32.00 10.00 20.00 10.00
1986 32.00 22.00 36.00 35.00 41.00 49.00 49.00 50.00 42.00 38.00 29.00 29.00 22.00
1987 23.00 29.00 35.00 34.00 40.00 46.00 49.00 49.00 44.00 39.00 31.00 25.00 23.00
1988 23.00 22.00 32.00 36.00 39.00 44.00 50.00 50.00 43.00 36.00 30.00 27.00 22.00
1989 25.00 7.00 20.00 36.00 39.00 48.00 49.00 51.00 46.00 35.00 34.00 29.00 7.00
1990 26.00 20.00 32.00 40.00 39.00 46.00 50.00 50.00 46.00 38.00 30.00 12.00 12.00
1991 26.00 32.00 31.00 34.00 39.00 42.00 49.00 49.00 45.00 30.00 32.00 26.00 26.00
1992 25.00 32.00 34.00 35.00 40.00 48.00 53.00 49.00 44.00 37.00 31.00 27.00 25.00
1993 22.00 23.00 33.00 36.00 44.00 48.00 50.00 48.00 43.00 41.00 19.00 26.00 19.00
1994 27.00 22.00 31.00 37.00 41.00 46.00 51.00 54.00 49.00 41.00 30.00 21.00 21.00
1995 29.00 22.00 29.00 38.00 43.00 45.00 52.00 50.00 49.00 36.00 32.00 24.00 22.00
1996 15.00 22.00 30.00 37.00 39.00 47.00 52.00 51.00 44.00 32.00 23.00 27.00 15.00
1997 21.00 26.00 33.00 32.00 38.00 47.00 52.00 53.00 46.00 35.00 34.00 29.00 21.00
1998 23.00 30.00 28.00 34.00 41.00 48.00 54.00 52.00 46.00 36.00 36.00 15.00 15.00
1999 30.00 31.00 30.00 34.00 36.00 43.00 48.00 50.00 42.00 36.00 34.00 30.00 30.00
2000 29.00 31.00 32.00 35.00 39.00 47.00 50.00 50.00 45.00 40.00 27.00 28.00 27.00
2001 27.00 26.00 31.00 34.00 39.00 44.00 49.00 51.00 44.00 32.00 34.00 30.00 26.00
2002 25.00 28.00 28.00 34.00 35.00 42.00 49.00 50.00 45.00 34.00 30.00 28.00 25.00
2003 32.00 25.00 34.00 34.00 37.00 48.00 50.00 50.00 47.00 30.00 28.00 25.00 25.00
2004 20.00 31.00 32.00 37.00 44.00 46.00 52.00 54.00 47.00 37.00 29.00 29.00 20.00
2005 23.00 26.00 37.00 36.00 44.00 48.00 51.00 53.00 42.00 37.00 29.00 23.00 23.00
2006 37.00 23.00 31.00 36.00 39.00 50.00 53.00 51.00 47.00 30.00 18.00 27.00 18.00
2007 19.00 28.00 31.00 34.00 41.00 46.00 54.00 52.00 46.00 34.00 29.00 28.00 19.00
2008 25.00 31.00 31.00 32.00 39.00 44.00 51.00 51.00 43.00 37.00 34.00 14.00 14.00
2009 25.00 26.00 26.00 33.00 40.00 49.00 52.00 52.00 42.00 38.00 32.00 16.00 16.00
2010 35.00 31.00 28.00 34.00 40.00 46.00 50.00 50.00 48.00 37.00 14.00 21.00 14.00
2011 25.00 19.00 33.00 33.00 38.00 46.00 49.00 52.00 46.00 37.00 27.00 26.00 19.00
2012 26.00 28.00 29.00 35.00 39.00 43.00 49.00 50.00 46.00 38.00 31.00 29.00 26.00
2013 24.00 34.00 32.00 47.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 30.00 z 24.00
Period of Record Statistics
MEAN 22.65 25.62 29.55 33.91 38.61 45.38 49.25 49.43 43.42 35.49 28.03 24.11 17.98
S.D. 7.03 6.77 4.45 2.36 3.06 2.60 2.63 2.66 3.35 3.26 5.70 6.19 6.84
SKEW -0.73 -1.72 -1.27 -0.33 -0.66 -0.36 -0.53 -0.48 -0.44 -0.26 -1.72 -1.09 -0.48
MAX 37.00 34.00 39.00 40.00 44.00 50.00 54.00 54.00 50.00 41.00 36.00 33.00 30.00
MIN 0.00 1.00 11.00 29.00 28.00 38.00 43.00 44.00 35.00 28.00 6.00 6.00 0.00
NO YRS 65 65 65 64 64 64 65 65 65 65 65 65 64