CHIEF JOSEPH DAM, WASHINGTON

Period of Record General Climate Summary - Precipitation

Station:(451400) CHIEF JOSEPH DAM
From Year=1949 To Year=2012
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 1.31 4.26 1995 0.02 1977 0.99 15/1968 9 4 0 0 7.1 22.5 1950
February 1.05 4.23 1961 0.00 2005 1.00 03/1961 6 3 0 0 3.4 17.5 1989
March 0.86 2.77 1995 0.02 2007 0.76 10/1995 6 3 0 0 1.1 9.5 1962
April 0.60 1.67 1993 0.00 1954 0.79 14/1957 5 2 0 0 0.0 2.0 1955
May 0.84 2.65 2011 0.01 1992 1.23 11/1967 6 3 0 0 0.0 0.0 1950
June 0.86 2.45 1984 0.00 1960 1.24 21/1984 5 2 0 0 0.0 0.0 1950
July 0.39 3.08 1993 0.00 1953 1.74 23/1992 3 1 0 0 0.0 0.0 1950
August 0.38 2.24 1976 0.00 1950 1.14 29/1951 3 1 0 0 0.0 0.0 1950
September 0.38 2.65 1986 0.00 1953 0.90 23/1973 3 1 0 0 0.0 0.0 1950
October 0.63 2.04 1956 0.00 1952 1.01 27/1956 5 2 0 0 0.1 1.8 1971
November 1.29 5.57 1983 0.05 1976 1.16 11/1983 9 4 0 0 2.4 13.8 1955
December 1.66 5.18 1996 0.20 1989 1.10 29/1996 10 6 1 0 10.8 37.5 1996
Annual 10.25 21.57 1983 5.61 1985 1.74 19920723 69 33 4 0 25.0 71.4 1996
Winter 4.02 8.44 1983 1.36 1955 1.10 19961229 25 13 2 0 21.4 49.2 1997
Spring 2.30 5.47 2011 0.52 1973 1.23 19670511 17 8 1 0 1.2 9.5 1962
Summer 1.64 5.09 1993 0.20 1960 1.74 19920723 11 5 1 0 0.0 0.0 1950
Fall 2.30 6.99 1983 0.31 1976 1.16 19831111 17 7 1 0 2.4 13.8 1955
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