MERWIN DAM, WASHINGTON

Period of Record General Climate Summary - Precipitation

Station:(455305) MERWIN DAM
From Year=1971 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 10.06 17.76 2006 0.38 1985 4.90 11/1972 21 17 7 3 1.3 12.8 2004
February 7.89 15.74 1999 0.83 1993 3.12 10/1990 18 14 6 2 1.3 21.0 1990
March 7.37 12.56 1997 2.46 1992 2.15 25/1988 20 15 6 1 0.1 2.0 2006
April 5.72 11.72 1993 1.87 1999 2.97 05/1991 18 13 4 1 0.0 0.8 1976
May 4.08 6.96 1998 0.40 1992 1.92 28/2004 15 10 3 0 0.0 0.0 1972
June 3.01 7.26 1981 0.79 1992 2.50 07/1985 11 7 2 0 0.0 0.0 1972
July 1.20 4.91 1983 0.00 1984 1.50 09/1974 6 3 1 0 0.0 0.0 1972
August 1.78 5.75 1976 0.01 1998 2.04 24/1977 6 4 1 0 0.0 0.0 1972
September 3.07 7.30 1977 0.07 1993 2.59 03/1979 9 6 2 1 0.0 0.0 1972
October 5.61 11.98 1990 0.11 1987 3.05 27/1994 14 10 5 1 0.0 0.0 1972
November 10.77 22.04 1973 2.42 1976 4.45 28/1995 21 17 8 3 0.2 3.5 1977
December 11.54 21.74 1971 3.12 1985 4.98 02/1977 21 17 9 4 0.8 7.5 1971
Annual 72.07 94.16 1996 52.66 1992 4.98 19771202 180 134 54 16 3.8 24.8 1990
Winter 29.49 49.65 1972 12.82 1977 4.98 19771202 60 49 22 8 3.5 22.0 1990
Spring 17.16 25.03 1991 9.91 1992 2.97 19910405 54 38 12 2 0.2 1.0 2002
Summer 5.98 12.82 1983 1.08 2003 2.50 19850607 23 14 4 1 0.0 0.0 1972
Fall 19.45 34.34 1973 5.96 1993 4.45 19951128 44 33 15 5 0.2 3.5 1977
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