SEATTLE TCOMA WSCMO AP, WASHINGTON

Period of Record General Climate Summary - Precipitation

Station:(457473) SEATTLE TCOMA WSCMO AP
From Year=1931 To Year=2006
Precipitation Total Snowfall
Mean High Year Low Year 1 Day Max. >=
0.01 in.
>=
0.10 in.
>=
0.50 in.
>=
1.00 in.
Mean High Year
in. in. - in. - in. dd/yyyy
or
yyyymmdd
# Days # Days # Days # Days in. in. -
January 5.79 12.92 1953 0.58 1985 2.98 18/1986 19 13 4 1 5.1 57.2 1950
February 4.02 9.11 1961 0.35 1993 3.06 08/1996 15 10 2 0 1.7 13.1 1949
March 3.71 8.40 1950 0.57 1965 2.70 05/1972 17 11 2 0 1.3 18.2 1951
April 2.55 6.53 1991 0.33 1956 2.64 04/1991 14 7 1 0 0.1 2.3 1972
May 1.70 3.70 1977 0.12 1992 1.83 29/1969 11 5 1 0 0.0 0.0 1949
June 1.45 3.82 1964 0.13 1951 1.75 01/1968 9 4 1 0 0.0 0.0 1949
July 0.77 2.39 1983 0.00 1958 0.85 13/1981 5 2 0 0 0.0 0.0 1948
August 1.10 4.59 1975 0.01 1974 1.63 18/1975 6 3 1 0 0.0 0.0 1948
September 1.72 5.95 1978 0.00 1975 1.65 30/1953 9 5 1 0 0.0 0.0 1948
October 3.50 8.96 2003 0.31 1987 5.02 20/2003 13 8 2 0 0.0 2.0 1971
November 5.97 11.62 1998 0.74 1976 3.41 20/1959 18 13 4 1 0.9 17.5 1985
December 5.81 11.85 1979 1.37 1978 2.14 26/1974 19 13 4 1 2.6 22.1 1968
Annual 38.09 55.14 1950 23.78 1952 5.02 20031020 155 94 22 5 11.8 60.6 1950
Winter 15.62 22.77 1999 5.21 1977 3.06 19960208 53 35 10 2 9.4 67.5 1969
Spring 7.96 14.34 1997 3.24 1979 2.70 19720305 42 23 3 0 1.4 18.2 1951
Summer 3.31 8.43 1968 0.84 1987 1.75 19680601 20 9 2 0 0.0 0.0 1949
Fall 11.19 17.49 1950 2.72 1952 5.02 20031020 40 26 7 2 1.0 17.5 1985
Table updated on Jul 28, 2006
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