SEATTLE TACOMA INTL AP, WASHINGTON

Period of Record General Climate Summary - Temperature

Station:(457473) SEATTLE TCOMA WSCMO AP
From Year=1948 To Year=2012
Monthly Averages Daily Extremes Monthly Extremes Max. Temp. Min. Temp.
Max. Min. Mean High Date Low Date Highest
Mean		 Year Lowest
Mean		 Year >=
90 F		 <=
32 F		 <=
32 F		 <=
0 F
F F F F dd/yyyy
or
yyyymmdd		 F dd/yyyy
or
yyyymmdd		 F - F - # Days # Days # Days # Days
January 45.0 35.1 40.1 64 20/1981 0 31/1950 47.0 2010 24.9 1950 0.0 1.3 9.7 0.0
February 49.0 36.7 42.8 70 27/1968 1 01/1950 48.7 1977 35.6 1956 0.0 0.2 6.5 0.0
March 52.1 38.2 45.2 78 29/2004 11 04/1955 50.3 1992 39.1 1955 0.0 0.0 3.8 0.0
April 57.4 41.3 49.3 85 30/1976 29 21/1951 53.5 1977 44.5 1955 0.0 0.0 0.4 0.0
May 64.1 46.5 55.3 93 21/1963 28 01/1954 60.4 1958 50.6 1962 0.1 0.0 0.0 0.0
June 69.3 51.4 60.3 96 09/1955 38 12/1952 64.9 1992 55.5 1953 0.4 0.0 0.0 0.0
July 75.2 54.8 65.0 103 29/2009 43 04/1949 69.5 2009 60.0 1955 1.2 0.0 0.0 0.0
August 74.9 55.0 65.0 99 09/1960 44 04/1950 71.1 1967 60.6 1954 0.9 0.0 0.0 0.0
September 69.5 51.5 60.5 98 02/1988 35 27/1972 65.7 1967 55.3 1972 0.2 0.0 0.0 0.0
October 59.3 45.4 52.4 89 01/1987 28 19/1949 56.4 1965 48.6 1949 0.0 0.0 0.3 0.0
November 50.4 39.6 45.0 74 04/1949 6 15/1955 49.4 1965 35.8 1985 0.0 0.3 4.0 0.0
December 45.4 35.9 40.6 64 10/1993 6 30/1968 45.2 1969 35.2 1990 0.0 0.9 8.5 0.0
Annual 59.3 44.3 51.8 103 20090729 0 19500131 54.4 1995 47.9 1955 2.8 2.7 33.2 0.0
Winter 46.5 35.9 41.2 70 19680227 0 19500131 45.0 1992 34.4 1950 0.0 2.4 24.7 0.0
Spring 57.9 42.0 49.9 93 19630521 11 19550304 54.4 1992 44.8 1955 0.1 0.0 4.2 0.0
Summer 73.1 53.7 63.4 103 20090729 38 19520612 66.7 1967 59.0 1954 2.5 0.0 0.0 0.0
Fall 59.7 45.5 52.6 98 19880902 6 19551115 55.9 1967 48.4 1985 0.2 0.3 4.3 0.0
Table updated on Oct 31, 2012
For monthly and annual means, thresholds, and sums:
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered
Seasons are climatological not calendar seasons
Winter = Dec., Jan., and Feb. Spring = Mar., Apr., and May
Summer = Jun., Jul., and Aug. Fall = Sep., Oct., and Nov. 






Western Regional Climate Center, wrcc@dri.edu