MERWIN DAM, WASHINGTON

Period of Record General Climate Summary - Precipitation

Station:(450242) ARIEL DAM
From Year=1930 To Year=1971
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 10.88 20.29 1964 2.04 1949 3.29 22/1954 21 17 8 3 6.6 65.0 1950
February 8.15 20.85 1961 2.01 1934 6.62 27/1942 17 14 6 2 2.6 41.8 1949
March 7.68 14.63 1932 1.53 1965 3.00 09/1966 20 16 5 1 1.4 22.0 1951
April 4.66 9.87 1937 0.48 1939 1.88 27/1962 16 11 3 0 0.0 0.0 1934
May 3.18 8.06 1960 0.22 1947 1.95 15/1959 12 8 2 0 0.0 0.0 1936
June 3.06 6.83 1937 0.25 1940 2.15 02/1968 10 7 2 1 0.0 0.0 1943
July 1.00 2.62 1942 0.00 1937 1.87 03/1966 4 3 1 0 0.0 0.0 1941
August 1.62 7.50 1968 0.00 1955 2.98 03/1956 6 3 1 0 0.0 0.0 1943
September 3.09 7.65 1941 0.33 1942 2.22 04/1945 9 6 2 1 0.0 0.0 1943
October 7.15 14.36 1955 1.12 1952 2.52 11/1959 15 12 5 2 0.0 0.0 1934
November 10.18 19.16 1962 1.05 1936 4.40 20/1962 19 16 7 3 0.1 1.5 1950
December 12.06 25.19 1933 4.03 1944 3.50 22/1933 22 18 9 4 0.4 2.4 1948
Annual 72.70 90.19 1961 44.42 1952 6.62 19420227 170 130 53 18 11.2 66.8 1950
Winter 31.09 45.24 1971 17.45 1944 6.62 19420227 60 49 23 9 9.6 66.2 1950
Spring 15.52 26.26 1960 6.94 1939 3.00 19660309 47 35 10 2 1.4 22.0 1951
Summer 5.67 13.49 1968 1.33 1945 2.98 19560803 21 13 4 1 0.0 0.0 1943
Fall 20.42 34.08 1955 4.45 1952 4.40 19621120 42 33 15 6 0.1 1.5 1950
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