ARROWROCK DAM, IDAHO

Period of Record General Climate Summary - Temperature

Station:(100448) ARROWROCK DAM
From Year=1911 To Year=2012
Monthly Averages Daily Extremes Monthly Extremes Max. Temp. Min. Temp.
Max. Min. Mean High Date Low Date Highest
Mean		 Year Lowest
Mean		 Year >=
90 F		 <=
32 F		 <=
32 F		 <=
0 F
F F F F dd/yyyy
or
yyyymmdd		 F dd/yyyy
or
yyyymmdd		 F - F - # Days # Days # Days # Days
January 33.6 18.5 26.0 56 09/1923 -32 21/1937 36.5 2003 2.2 1949 0.0 12.2 28.5 2.1
February 40.4 22.4 31.5 67 29/1992 -20 09/1933 40.9 1963 16.1 1933 0.0 3.8 24.7 1.0
March 50.0 28.6 39.3 81 17/1941 -1 02/1917 48.0 1934 29.2 1917 0.0 0.4 22.2 0.0
April 60.2 35.8 48.0 92 28/1987 8 01/1936 55.9 1915 40.0 1975 0.0 0.0 9.1 0.0
May 70.1 42.7 56.4 98 28/1919 21 01/1972 63.4 1924 50.0 1977 1.0 0.0 1.5 0.0
June 79.1 49.4 64.3 108 18/1940 28 06/1914 72.5 1918 58.8 1953 5.0 0.0 0.0 0.0
July 90.7 56.4 73.4 112 29/1934 37 08/1999 79.5 1960 63.6 1993 19.0 0.0 0.0 0.0
August 89.7 55.2 72.4 109 03/1961 35 30/1912 77.9 1961 65.7 1968 17.7 0.0 0.0 0.0
September 78.9 46.1 62.6 830 08/1931 21 24/1926 89.5 1931 54.7 1970 4.4 0.0 0.6 0.0
October 63.7 37.1 50.4 94 01/1992 16 31/1919 57.8 1988 43.9 1969 0.0 0.0 7.5 0.0
November 45.9 28.8 37.5 73 01/1988 -6 23/1931 44.2 1999 28.7 1985 0.0 1.4 20.3 0.1
December 35.5 21.6 28.9 62 10/1939 -22 25/1924 37.5 1917 17.3 1930 0.0 9.2 27.2 1.0
Annual 61.5 36.9 49.2 830 19310908 -32 19370121 53.5 1934 46.1 1955 47.1 27.0 141.8 4.3
Winter 36.5 20.9 28.8 67 19920229 -32 19370121 36.8 1934 15.3 1949 0.0 25.2 80.5 4.1
Spring 60.1 35.7 47.9 98 19190528 -1 19170302 55.6 1934 41.8 1917 1.0 0.4 32.8 0.0
Summer 86.5 53.7 70.0 112 19340729 28 19140606 75.5 1961 63.7 1993 41.6 0.0 0.0 0.0
Fall 62.8 37.3 50.2 830 19310908 -6 19311123 54.4 1963 46.2 1970 4.5 1.4 28.4 0.1
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