ARROWROCK DAM, IDAHO

Period of Record General Climate Summary - Precipitation

Station:(100448) ARROWROCK DAM
From Year=1911 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 2.80 9.09 1970 0.17 1985 2.20 18/1953 11 7 2 0 13.9 48.0 1964
February 2.31 8.48 1986 0.12 1913 3.10 02/1916 9 6 1 0 8.0 65.0 1949
March 1.88 5.09 1932 0.14 1994 1.20 29/1913 9 6 1 0 2.5 16.0 1985
April 1.48 3.94 1965 0.04 1949 1.37 14/1973 8 4 1 0 0.1 3.8 2003
May 1.41 5.06 1998 0.00 1924 1.26 29/1990 7 4 1 0 0.0 0.0 1912
June 0.96 3.46 1958 0.00 1917 1.44 30/1938 5 3 0 0 0.0 0.0 1912
July 0.35 3.31 1913 0.00 1917 1.40 24/1913 2 1 0 0 0.0 0.0 1913
August 0.29 3.85 1968 0.00 1914 1.08 12/1941 2 1 0 0 0.0 0.0 1912
September 0.64 3.74 1959 0.00 1916 1.69 26/1959 4 2 0 0 0.0 0.0 1912
October 1.17 3.69 1956 0.00 1936 1.89 07/1913 6 3 1 0 0.1 3.0 1975
November 2.60 6.99 1927 0.00 1936 2.05 27/1971 9 6 2 0 4.6 31.0 1985
December 2.67 7.57 1964 0.12 1976 1.93 28/1945 10 7 2 0 11.8 50.0 1971
Annual 18.56 30.10 1983 10.61 1924 3.10 19160202 83 52 10 2 41.0 96.8 1949
Winter 7.78 18.18 1916 1.38 1977 3.10 19160202 31 21 4 1 33.7 122.9 1949
Spring 4.77 8.85 1917 0.90 1924 1.37 19730414 24 14 2 0 2.6 16.0 1985
Summer 1.60 5.82 1913 0.00 1917 1.44 19380630 10 5 1 0 0.0 0.0 1913
Fall 4.41 9.29 1927 0.30 1936 2.05 19711127 19 12 2 1 4.7 32.0 1985
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