ARROWROCK DAM, IDAHO

Monthly Extreme Maximum Temperature (Degrees Fahrenheit)

(100448)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1911 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 52.00 l 46.00 52.00
1912 46.00 54.00 65.00 79.00 87.00 101.00 101.00 97.00 86.00 81.00 65.00 48.00 101.00
1913 47.00 53.00 68.00 84.00 95.00 96.00 102.00 101.00 96.00 83.00 65.00 47.00 102.00
1914 52.00 55.00 74.00 79.00 97.00 a 99.00 101.00 100.00 94.00 86.00 70.00 48.00 101.00
1915 52.00 60.00 75.00 85.00 82.00 88.00 101.00 c 104.00 ----- z ----- z 69.00 55.00 a 104.00
1916 53.00 49.00 68.00 83.00 ----- z 97.00 r 100.00 a 95.00 b 90.00 z 71.00 c 65.00 b 47.00 c 100.00
1917 50.00 y 51.00 63.00 64.00 a 86.00 b 94.00 104.00 e 98.00 c 99.00 c 82.00 g 66.00 i 56.00 104.00
1918 49.00 b 53.00 b 69.00 a 72.00 c 85.00 b 102.00 c 102.00 g 98.00 b 92.00 d 82.00 61.00 f 54.00 b 102.00
1919 51.00 a 49.00 64.00 a 82.00 c 98.00 c 100.00 d 104.00 c 102.00 93.00 e 69.00 c 54.00 46.00 b 104.00
1920 50.00 56.00 a 60.00 g 65.00 c 79.00 c 92.00 b 103.00 d 105.00 a 94.00 88.00 a 60.00 a 43.00 105.00
1921 49.00 54.00 67.00 a 75.00 e 82.00 93.00 a 101.00 a 98.00 b 86.00 e 81.00 f 67.00 a 48.00 101.00
1922 37.00 a 46.00 55.00 70.00 a 85.00 a 97.00 102.00 e 100.00 94.00 a 86.00 59.00 b 46.00 a 102.00
1923 56.00 a 46.00 69.00 a 77.00 a 86.00 93.00 99.00 100.00 d 98.00 b 80.00 a 57.00 a 45.00 100.00
1924 43.00 58.00 a 58.00 c 76.00 d 91.00 98.00 a 104.00 c 106.00 c 103.00 b 82.00 c 59.00 c 47.00 d 106.00
1925 44.00 48.00 c 65.00 b 79.00 84.00 b 99.00 b 104.00 c 101.00 b 94.00 b 72.00 b 55.00 b 51.00 a 104.00
1926 41.00 57.00 68.00 b 86.00 85.00 a 104.00 a 105.00 b 104.00 a 89.00 d 81.00 c 63.00 54.00 105.00
1927 ----- z 52.00 e 60.00 a 85.00 a 92.00 95.00 c 101.00 a 98.00 96.00 85.00 c 61.00 d 45.00 c 101.00
1928 40.00 49.00 a 72.00 b 77.00 91.00 94.00 b 107.00 107.00 b 97.00 c 79.00 f 61.00 e 46.00 e 107.00
1929 39.00 a 44.00 c 65.00 a 71.00 92.00 95.00 a 101.00 d 108.00 d 97.00 c 82.00 f 56.00 d 56.00 c 108.00
1930 49.00 54.00 68.00 a 85.00 c 88.00 a 94.00 b 104.00 c 103.00 b 94.00 f 73.00 c 60.00 d 40.00 b 104.00
1931 40.00 a 49.00 a 61.00 e 76.00 b 91.00 99.00 b 110.00 106.00 a 830.00 80.00 a 68.00 e 42.00 c 830.00
1932 45.00 a 49.00 68.00 76.00 a 88.00 a 97.00 a 102.00 a 103.00 b 96.00 a 86.00 59.00 b 50.00 103.00
1933 43.00 41.00 a 53.00 78.00 89.00 100.00 108.00 106.00 a 95.00 b 84.00 c 57.00 52.00 a 108.00
1934 48.00 58.00 a 72.00 a 87.00 92.00 95.00 112.00 a 103.00 c 98.00 b 89.00 c 65.00 c 45.00 a 112.00
1935 42.00 51.00 63.00 72.00 87.00 a 94.00 a 106.00 103.00 92.00 b 89.00 c 50.00 b 46.00 106.00
1936 46.00 45.00 a 55.00 a 85.00 96.00 a 98.00 i 108.00 b 98.00 93.00 a 82.00 57.00 a 45.00 b 108.00
1937 32.00 a 42.00 a 59.00 78.00 a 87.00 a 99.00 a 98.00 w 97.00 a 96.00 a 80.00 c 64.00 53.00 99.00
1938 48.00 b 55.00 a 55.00 a 79.00 90.00 a 92.00 a 101.00 c 98.00 97.00 a 80.00 a 47.00 44.00 101.00
1939 45.00 45.00 a 65.00 i 86.00 91.00 101.00 b 104.00 a 103.00 95.00 76.00 68.00 62.00 104.00
1940 50.00 61.00 72.00 79.00 92.00 108.00 105.00 105.00 95.00 81.00 55.00 56.00 108.00
1941 45.00 56.00 81.00 84.00 93.00 97.00 103.00 100.00 86.00 75.00 63.00 59.00 103.00
1942 47.00 49.00 66.00 80.00 88.00 96.00 105.00 103.00 95.00 87.00 59.00 42.00 105.00
1943 50.00 48.00 67.00 83.00 85.00 91.00 105.00 98.00 94.00 89.00 54.00 45.00 105.00
1944 42.00 49.00 63.00 74.00 87.00 98.00 101.00 99.00 97.00 82.00 55.00 47.00 101.00
1945 50.00 47.00 59.00 83.00 85.00 97.00 100.00 99.00 99.00 83.00 62.00 53.00 100.00
1946 41.00 47.00 66.00 88.00 83.00 91.00 104.00 102.00 92.00 84.00 55.00 51.00 104.00
1947 47.00 57.00 69.00 76.00 91.00 87.00 101.00 101.00 95.00 84.00 71.00 47.00 101.00
1948 50.00 51.00 61.00 78.00 91.00 99.00 98.00 99.00 94.00 82.00 a 59.00 46.00 99.00
1949 38.00 47.00 a 58.00 82.00 91.00 98.00 102.00 104.00 95.00 76.00 65.00 49.00 104.00
1950 46.00 53.00 62.00 76.00 81.00 95.00 102.00 100.00 105.00 84.00 64.00 54.00 105.00
1951 51.00 47.00 60.00 74.00 85.00 89.00 104.00 b 102.00 92.00 82.00 62.00 50.00 104.00
1952 41.00 c 47.00 57.00 82.00 86.00 96.00 100.00 98.00 94.00 83.00 58.00 47.00 100.00
1953 51.00 a 56.00 69.00 79.00 82.00 90.00 104.00 a 103.00 95.00 85.00 64.00 49.00 104.00
1954 50.00 57.00 63.00 74.00 d 94.00 98.00 100.00 a 99.00 95.00 79.00 69.00 54.00 100.00
1955 43.00 47.00 55.00 73.00 83.00 100.00 103.00 103.00 102.00 83.00 56.00 55.00 103.00
1956 51.00 55.00 71.00 81.00 a 89.00 94.00 104.00 101.00 92.00 82.00 55.00 a 52.00 104.00
1957 40.00 51.00 59.00 77.00 84.00 95.00 99.00 99.00 96.00 89.00 53.00 53.00 99.00
1958 41.00 60.00 57.00 69.00 95.00 96.00 101.00 102.00 97.00 85.00 62.00 48.00 102.00
1959 52.00 56.00 63.00 79.00 93.00 100.00 106.00 98.00 96.00 74.00 56.00 45.00 106.00
1960 47.00 48.00 73.00 79.00 87.00 96.00 109.00 101.00 92.00 a 84.00 61.00 54.00 109.00
1961 49.00 59.00 63.00 73.00 96.00 a 105.00 103.00 109.00 88.00 82.00 50.00 51.00 109.00
1962 52.00 48.00 63.00 81.00 76.00 98.00 100.00 100.00 93.00 84.00 64.00 53.00 100.00
1963 45.00 60.00 67.00 77.00 85.00 90.00 97.00 100.00 97.00 88.00 62.00 43.00 100.00
1964 48.00 42.00 61.00 74.00 88.00 93.00 100.00 99.00 84.00 81.00 64.00 59.00 100.00
1965 52.00 53.00 67.00 73.00 84.00 91.00 97.00 100.00 d 82.00 86.00 70.00 52.00 100.00
1966 48.00 50.00 76.00 79.00 93.00 96.00 98.00 103.00 96.00 76.00 63.00 48.00 103.00
1967 48.00 59.00 62.00 62.00 88.00 92.00 103.00 101.00 98.00 75.00 67.00 49.00 103.00
1968 44.00 56.00 70.00 79.00 85.00 100.00 104.00 96.00 90.00 77.00 56.00 52.00 104.00
1969 50.00 46.00 73.00 81.00 88.00 96.00 99.00 103.00 94.00 73.00 67.00 55.00 103.00
1970 50.00 57.00 60.00 73.00 86.00 98.00 97.00 99.00 92.00 86.00 59.00 43.00 99.00
1971 47.00 53.00 61.00 67.00 81.00 95.00 100.00 102.00 94.00 80.00 55.00 50.00 102.00
1972 46.00 47.00 71.00 73.00 91.00 94.00 101.00 100.00 88.00 76.00 59.00 50.00 101.00
1973 50.00 56.00 67.00 72.00 87.00 95.00 104.00 101.00 96.00 82.00 58.00 50.00 104.00
1974 51.00 53.00 60.00 75.00 83.00 102.00 100.00 97.00 91.00 82.00 59.00 50.00 102.00
1975 44.00 44.00 53.00 64.00 87.00 87.00 104.00 96.00 92.00 86.00 68.00 45.00 104.00
1976 42.00 56.00 55.00 71.00 86.00 97.00 100.00 ----- z 95.00 81.00 62.00 47.00 100.00
1977 43.00 62.00 66.00 88.00 80.00 100.00 100.00 101.00 93.00 77.00 58.00 52.00 101.00
1978 50.00 52.00 75.00 69.00 82.00 89.00 102.00 100.00 93.00 80.00 65.00 49.00 102.00
1979 42.00 50.00 63.00 73.00 88.00 98.00 103.00 100.00 97.00 86.00 59.00 50.00 103.00
1980 47.00 61.00 61.00 80.00 89.00 89.00 105.00 96.00 94.00 82.00 68.00 53.00 105.00
1981 48.00 60.00 61.00 75.00 81.00 96.00 101.00 100.00 97.00 73.00 62.00 57.00 101.00
1982 46.00 49.00 59.00 74.00 84.00 94.00 96.00 101.00 92.00 74.00 55.00 50.00 101.00
1983 51.00 61.00 65.00 70.00 93.00 90.00 103.00 107.00 95.00 75.00 66.00 43.00 107.00
1984 44.00 47.00 66.00 79.00 95.00 100.00 98.00 100.00 94.00 84.00 55.00 a 41.00 100.00
1985 38.00 49.00 59.00 84.00 87.00 98.00 103.00 s 98.00 j 79.00 a 73.00 i 69.00 46.00 103.00
1986 49.00 62.00 77.00 82.00 95.00 99.00 100.00 103.00 92.00 74.00 c 59.00 k 45.00 103.00
1987 44.00 54.00 64.00 92.00 92.00 98.00 101.00 j 100.00 l 100.00 i 85.00 j 70.00 k 58.00 o 101.00
1988 47.00 l 62.00 b 71.00 a 83.00 91.00 103.00 103.00 103.00 95.00 a 85.00 73.00 45.00 103.00
1989 41.00 45.00 63.00 82.00 90.00 95.00 106.00 99.00 90.00 80.00 57.00 48.00 106.00
1990 55.00 53.00 68.00 83.00 83.00 a 101.00 a 102.00 108.00 95.00 86.00 61.00 45.00 108.00
1991 45.00 59.00 61.00 70.00 77.00 90.00 100.00 103.00 93.00 82.00 56.00 47.00 103.00
1992 53.00 67.00 72.00 87.00 91.00 99.00 99.00 104.00 94.00 94.00 52.00 47.00 104.00
1993 44.00 50.00 67.00 69.00 89.00 97.00 100.00 96.00 93.00 84.00 62.00 55.00 100.00
1994 49.00 53.00 73.00 88.00 90.00 103.00 106.00 106.00 94.00 80.00 61.00 44.00 106.00
1995 50.00 65.00 a 58.00 72.00 84.00 95.00 101.00 100.00 94.00 80.00 61.00 59.00 n 101.00
1996 49.00 j 53.00 64.00 83.00 84.00 95.00 a 104.00 103.00 ----- z 85.00 q 58.00 51.00 i 104.00
1997 52.00 50.00 k 76.00 k 75.00 89.00 h 91.00 99.00 102.00 95.00 91.00 65.00 49.00 102.00
1998 52.00 56.00 67.00 83.00 a 85.00 86.00 a 102.00 105.00 103.00 83.00 59.00 54.00 105.00
1999 46.00 51.00 74.00 84.00 94.00 96.00 101.00 100.00 91.00 84.00 b 72.00 59.00 101.00
2000 44.00 k 59.00 a 66.00 86.00 84.00 a 93.00 102.00 105.00 99.00 76.00 n 52.00 41.00 105.00
2001 46.00 p 54.00 l 70.00 82.00 a 96.00 b 100.00 a 106.00 103.00 95.00 87.00 65.00 a 35.00 106.00
2002 39.00 i 49.00 66.00 i 73.00 ----- z 99.00 d 106.00 g 95.00 e 92.00 i 76.00 e 64.00 57.00 106.00
2003 49.00 52.00 i 68.00 j 77.00 98.00 95.00 e 105.00 100.00 96.00 88.00 59.00 52.00 105.00
2004 44.00 g 57.00 75.00 78.00 f 90.00 98.00 102.00 100.00 97.00 85.00 54.00 l 45.00 l 102.00
2005 48.00 54.00 69.00 72.00 85.00 95.00 105.00 104.00 94.00 ----- z ----- z ----- z 105.00
2006 ----- z ----- z ----- z 79.00 94.00 97.00 ----- z ----- z 94.00 ----- z 70.00 48.00 97.00
2007 44.00 56.00 71.00 78.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 41.00 m 78.00
2008 47.00 49.00 55.00 78.00 91.00 101.00 100.00 102.00 92.00 ----- z ----- z ----- z 102.00
2009 ----- z 55.00 65.00 84.00 91.00 93.00 102.00 101.00 101.00 75.00 ----- z ----- z 102.00
2010 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
2011 50.00 c 59.00 57.00 68.00 86.00 a 93.00 102.00 105.00 96.00 89.00 56.00 53.00 105.00
2012 47.00 a 51.00 71.00 86.00 a 89.00 93.00 105.00 105.00 93.00 81.00 67.00 59.00 a 105.00
2013 46.00 58.00 68.00 74.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 74.00
Period of Record Statistics
MEAN 46.66 52.77 65.05 77.81 88.05 95.98 102.34 101.27 102.02 81.70 60.98 49.29 102.93
S.D. 4.41 5.50 6.06 6.12 4.72 4.18 2.93 3.07 76.42 4.98 5.49 4.96 2.58
SKEW -0.56 0.13 0.08 -0.26 -0.03 -0.05 0.52 0.22 9.45 -0.32 0.00 0.11 0.47
MAX 56.00 67.00 81.00 92.00 98.00 108.00 112.00 109.00 830.00 94.00 73.00 62.00 109.00
MIN 32.00 41.00 53.00 62.00 76.00 86.00 96.00 95.00 79.00 69.00 47.00 35.00 99.00
NO YRS 91 97 95 99 96 97 93 95 93 87 91 93 57