ARROWROCK DAM, IDAHO

Monthly Total Cooling Degree Days

(100448)

Base Temperature = 65 F

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.
Months with 5 missing days or less use mean for missing day(s)
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 l 0.00 0.00
1912 0.00 0.00 0.00 0.00 6.00 140.50 165.00 104.50 0.00 0.00 0.00 0.00 416.00
1913 0.00 0.00 0.00 0.00 44.50 80.00 193.00 236.00 57.50 0.00 0.00 0.00 611.00
1914 0.00 0.00 0.00 0.00 23.77 a 77.00 312.50 239.50 32.00 2.00 0.00 0.00 686.77
1915 0.00 0.00 0.00 0.00 0.00 4.50 136.52 e 302.00 0.00 z 0.00 z 0.00 0.00 b 443.02
1916 0.00 0.00 0.00 1.00 0.00 z 44.00 r 203.05 a 196.69 b 0.00 z 0.00 c 0.00 b 0.00 c 400.74
1917 0.00 y 0.00 0.00 0.00 a 5.88 b 49.50 357.69 e 152.00 m 101.11 c 0.00 g 0.00 k 0.00 514.18
1918 0.00 b 0.00 b 0.00 a 0.00 d 6.95 b 256.73 d 222.00 j 141.10 b 65.19 d 6.50 0.00 f 0.00 b 476.47
1919 0.00 a 0.00 0.00 a 0.00 c 71.96 c 107.88 d 339.34 c 325.00 63.60 e 0.00 d 0.00 0.00 b 907.79
1920 0.00 0.00 b 0.00 g 0.00 f 0.00 e 61.15 d 276.50 g 288.62 b 64.00 13.43 a 0.00 b 0.00 427.21
1921 0.00 0.00 0.00 c 0.00 j 1.50 113.04 b 310.00 b 294.50 d 7.00 h 0.00 l 0.00 b 0.00 719.04
1922 0.00 b 0.00 0.00 0.00 b 8.02 b 146.00 296.29 e 305.50 92.14 b 5.50 0.00 d 0.00 d 853.45
1923 0.00 b 0.00 0.00 b 0.00 b 7.00 37.50 306.50 239.96 d 94.62 d 0.00 b 0.00 b 0.00 685.58
1924 0.00 0.00 b 0.00 c 0.00 g 55.00 72.32 b 228.00 g 232.50 e 99.81 d 6.09 c 0.00 c 0.00 g 465.72
1925 0.00 0.00 c 0.00 b 0.00 14.43 b 150.00 b 380.86 c 234.10 b 51.43 b 0.00 d 0.00 b 0.00 b 830.82
1926 0.00 0.00 0.00 b 3.00 7.75 a 195.52 a 392.09 d 258.69 b 13.85 d 0.50 g 0.00 0.00 870.90
1927 0.00 z 0.00 f 0.00 a 2.14 b 20.50 52.50 f 298.78 b 230.50 35.00 1.19 e 0.00 h 0.00 f 588.11
1928 0.00 0.00 b 0.00 c 0.00 52.50 36.92 d 332.00 214.70 d 71.11 c 0.00 k 0.00 j 0.00 j 707.24
1929 0.00 b 0.00 f 0.00 b 0.00 18.00 61.61 b 248.00 d 373.72 d 21.50 f 0.00 l 0.00 d 0.00 c 701.33
1930 0.00 0.00 0.00 b 0.00 c 9.30 a 53.04 b 321.00 f 285.41 b 27.00 j 0.00 e 0.00 h 0.00 b 347.75
1931 0.00 a 0.00 b 0.00 j 0.00 c 29.50 139.62 d 420.00 338.33 b 877.50 b 0.00 b 0.00 j 0.00 f 1804.94
1932 0.00 b 0.00 0.00 0.00 b 15.50 a 113.57 b 239.73 a 207.91 b 28.93 b 2.50 0.00 b 0.00 608.15
1933 0.00 0.00 a 0.00 0.00 6.50 125.50 354.00 277.97 a 15.56 c 0.00 d 0.00 0.00 a 779.52
1934 0.00 0.00 b 0.00 a 6.50 73.00 80.50 388.02 a 346.54 c 67.50 b 1.11 c 0.00 c 0.00 b 963.16
1935 0.00 0.00 0.00 0.00 2.58 a 64.29 b 268.00 218.50 73.39 b 4.43 c 0.00 d 0.00 631.19
1936 0.00 0.00 a 0.00 a 0.00 51.67 a 57.00 i 379.46 d 278.50 30.54 b 0.00 0.00 a 0.00 b 740.17
1937 0.00 b 0.00 a 0.00 0.00 a 14.98 a 59.48 a 80.00 w 205.12 a 105.00 a 0.00 c 0.00 0.00 384.58
1938 0.00 c 0.00 a 0.00 b 0.00 9.62 b 77.68 b 253.37 e 192.00 114.11 b 0.00 b 0.00 0.00 646.77
1939 0.00 0.00 b 0.00 j 1.50 22.00 49.62 d 290.76 b 303.50 40.50 0.00 0.00 0.00 707.87
1940 0.00 0.00 0.00 0.00 27.00 180.50 317.00 313.00 89.00 0.00 0.00 0.00 926.50
1941 0.00 0.00 0.00 0.00 26.50 66.00 323.50 218.60 b 3.00 0.00 0.00 0.00 637.60
1942 0.00 0.00 0.00 0.00 6.50 21.50 310.00 267.50 43.50 0.00 0.00 0.00 649.00
1943 0.00 0.00 0.00 0.00 2.00 22.50 249.00 184.00 66.50 5.00 0.00 0.00 529.00
1944 0.00 0.00 0.00 0.00 9.00 31.00 182.00 149.50 69.50 0.00 0.00 0.00 441.00
1945 0.00 0.00 0.00 0.00 3.50 40.00 267.00 227.00 57.50 0.00 0.00 0.00 595.00
1946 0.00 0.00 0.00 3.00 0.00 45.00 304.00 242.00 45.50 2.50 0.00 0.00 642.00
1947 0.00 0.00 0.00 0.00 42.00 23.50 279.00 213.50 66.50 1.50 0.00 0.00 626.00
1948 0.00 0.00 0.00 0.00 21.00 80.50 155.50 184.00 61.03 a 1.55 a 0.00 0.00 503.58
1949 0.00 0.00 a 0.00 0.00 a 20.50 50.50 241.00 250.50 98.00 0.00 0.00 0.00 660.50
1950 0.00 0.00 0.00 0.00 0.00 46.50 231.00 219.50 108.00 0.00 0.00 0.00 605.00
1951 0.00 0.00 0.00 0.00 5.50 25.00 297.17 b 221.00 33.50 0.00 0.00 0.00 582.17
1952 0.00 c 0.00 0.00 1.50 2.50 51.00 203.50 238.00 63.00 0.00 0.00 0.00 559.50
1953 0.00 a 0.00 0.00 0.00 0.00 11.00 268.67 a 199.00 87.93 a 0.50 0.00 0.00 567.10
1954 0.00 0.00 0.00 0.00 d 43.50 49.50 280.07 b 152.50 41.00 0.00 0.00 0.00 566.57
1955 0.00 0.00 0.00 0.00 3.00 91.50 219.50 300.00 105.00 0.00 0.00 0.00 719.00
1956 0.00 0.00 0.00 0.00 a 27.00 58.50 291.00 187.00 48.00 0.00 0.00 a 0.00 611.50
1957 0.00 0.00 0.00 0.00 7.50 94.50 275.50 282.00 79.50 6.50 0.00 0.00 745.50
1958 0.00 0.00 0.00 0.00 81.50 88.00 258.00 337.50 55.50 3.00 0.00 0.00 823.50
1959 0.00 0.00 0.00 0.00 13.50 132.00 346.00 183.50 55.50 0.00 0.00 0.00 730.50
1960 0.00 0.00 0.00 0.00 10.00 101.00 449.00 193.00 80.17 a 0.00 0.00 0.00 833.17
1961 0.00 0.00 0.00 0.00 29.45 a 224.00 359.00 399.00 13.50 0.00 0.00 0.00 1024.95
1962 0.00 0.00 0.00 1.00 0.00 81.00 213.00 171.50 28.00 1.00 0.00 0.00 495.50
1963 0.00 0.00 0.00 0.00 14.50 52.00 186.00 231.50 118.50 19.50 0.00 0.00 622.00
1964 0.00 0.00 0.00 0.00 9.00 41.50 286.00 181.50 0.00 0.00 0.00 0.00 518.00
1965 0.00 0.00 0.00 0.00 4.00 43.50 229.00 205.52 d 0.50 0.50 0.00 0.00 483.02
1966 0.00 0.00 0.00 0.00 49.00 75.50 261.00 219.00 92.50 0.00 0.00 0.00 697.00
1967 0.00 0.00 0.00 0.00 11.50 65.50 335.50 337.00 105.00 0.00 0.00 0.00 854.50
1968 0.00 0.00 0.00 0.00 2.50 75.00 299.50 127.50 27.00 0.00 0.00 0.00 531.50
1969 0.00 0.00 0.00 0.50 14.50 78.50 223.00 229.00 49.00 0.00 0.00 0.00 594.50
1970 0.00 0.00 0.00 0.00 4.00 131.50 222.50 252.00 16.00 0.00 0.00 0.00 626.00
1971 0.00 0.00 0.00 0.00 1.00 47.00 248.50 361.50 12.00 0.00 0.00 0.00 670.00
1972 0.00 0.00 0.00 0.00 21.00 81.00 211.00 259.50 14.00 0.00 0.00 0.00 586.50
1973 0.00 0.00 0.00 0.00 26.00 103.50 282.00 213.50 26.50 0.00 0.00 0.00 651.50
1974 0.00 0.00 0.00 0.00 1.00 180.00 244.50 184.50 27.50 0.00 0.00 0.00 637.50
1975 0.00 0.00 0.00 0.00 2.00 15.00 341.00 122.50 45.50 0.00 0.00 0.00 526.00
1976 0.00 0.00 0.00 0.00 2.50 36.50 243.00 0.00 z 34.50 0.00 0.00 0.00 316.50
1977 0.00 0.00 0.00 2.00 0.00 121.50 197.50 246.50 36.50 0.00 0.00 0.00 604.00
1978 0.00 0.00 0.00 0.00 2.00 30.50 200.50 176.50 34.00 0.00 0.00 0.00 443.50
1979 0.00 0.00 0.00 0.00 13.00 92.50 255.50 196.50 88.50 4.50 0.00 0.00 650.50
1980 0.00 a 0.00 0.00 0.00 15.50 43.50 235.00 114.50 29.00 0.00 0.00 0.00 437.50
1981 0.00 0.00 0.00 0.00 2.00 31.00 206.50 311.50 83.50 0.00 0.00 0.00 634.50
1982 0.00 0.00 0.00 0.00 1.50 96.00 176.50 260.00 39.00 0.00 0.00 0.00 573.00
1983 0.00 0.00 0.00 0.00 41.00 28.00 155.00 285.72 a 22.50 0.00 0.00 0.00 532.22
1984 0.00 0.00 0.00 0.00 8.00 48.00 237.00 267.50 35.00 0.00 0.00 a 0.00 595.50
1985 0.00 0.00 0.00 1.00 11.50 97.50 181.00 s 106.50 j 0.00 a 0.00 i 0.00 0.00 110.00
1986 0.00 0.00 0.00 0.00 60.00 179.00 150.00 330.00 32.00 0.00 c 0.00 k 0.00 751.00
1987 0.00 0.00 0.00 12.50 35.50 144.50 142.00 j 85.00 l 65.50 i 0.00 j 0.00 k 0.00 o 192.50
1988 0.00 l 0.00 c 0.00 a 0.00 11.50 173.00 281.50 172.05 a 38.79 a 0.00 0.00 0.00 676.84
1989 0.00 0.00 0.00 0.00 7.00 85.50 323.50 157.50 24.50 0.00 0.00 0.00 598.00
1990 0.00 0.00 a 0.00 2.50 1.03 a 99.83 a 289.00 238.00 110.50 1.00 0.00 0.00 741.86
1991 0.00 0.00 0.00 0.00 0.00 6.00 239.50 269.00 47.50 0.00 0.00 0.00 562.00
1992 0.00 0.00 0.00 1.00 32.50 149.50 154.50 276.50 35.00 24.00 0.00 0.00 673.00
1993 0.00 0.00 0.00 0.00 54.50 46.00 33.50 135.00 50.00 0.00 0.00 0.00 319.00
1994 0.00 0.00 0.00 6.50 20.00 140.00 351.50 338.00 81.00 0.00 0.00 0.00 937.00
1995 0.00 a 0.00 a 0.00 0.00 3.50 47.50 217.00 156.00 62.00 0.00 0.00 0.00 n 486.00
1996 0.00 j 0.00 0.00 0.00 0.00 68.79 a 302.50 247.50 0.00 z 2.00 q 0.00 0.00 i 618.79
1997 0.00 0.00 k 0.00 l 0.00 16.50 h 74.00 232.50 282.88 c 111.00 9.50 0.00 0.00 709.88
1998 0.00 0.00 0.00 0.00 a 0.52 a 9.31 a 351.00 287.00 97.00 i 0.00 0.00 0.00 647.83
1999 0.00 h 0.00 0.00 9.50 78.00 68.50 f 198.92 a 281.07 a 27.50 1.07 b 0.00 b 0.00 d 596.05
2000 0.00 l 0.00 f 0.00 a 0.00 b 15.00 f 90.56 c 315.88 b 254.50 h 68.57 b 0.00 n 0.00 h 0.00 e 475.01
2001 0.00 p 0.00 l 0.00 e 0.00 f 36.96 e 93.46 d 242.50 351.33 a 81.96 b 1.55 a 0.00 a 0.00 807.77
2002 0.00 i 0.00 0.00 i 0.00 0.00 z 163.20 e 326.50 g 168.12 e 42.00 i 0.00 e 0.00 0.00 331.32
2003 0.00 0.00 i 0.00 j 0.00 49.00 96.00 e 443.50 344.00 97.00 23.50 0.00 0.00 1053.00
2004 0.00 g 0.00 0.00 0.00 f 12.50 98.50 323.50 265.10 b 48.50 2.50 0.00 l 0.00 l 750.60
2005 0.00 b 0.00 0.00 0.00 10.00 68.50 396.00 352.00 54.00 0.00 z 0.00 z 0.00 z 880.50
2006 0.00 z 0.00 z 0.00 z 0.00 53.00 152.50 0.00 z 0.00 z 86.50 0.00 z 0.00 0.00 292.00
2007 0.00 0.00 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 m 0.00
2008 0.00 0.00 0.00 0.00 22.00 104.00 344.00 314.50 43.00 0.00 z 0.00 z 0.00 z 827.50
2009 0.00 z 0.00 0.00 0.00 48.00 54.50 323.50 284.00 167.00 0.00 0.00 z 0.00 z 877.00
2010 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
2011 0.00 c 0.00 0.00 0.00 8.78 a 34.50 224.50 357.00 117.00 20.00 0.00 0.00 761.78
2012 0.00 a 0.00 0.00 8.28 a 12.50 79.00 402.50 346.00 59.00 0.00 0.00 0.00 a 907.28
2013 0.00 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
Period of Record Statistics
MEAN 0.00 0.00 0.00 0.67 18.67 82.53 273.35 246.67 66.35 2.00 0.00 0.00 650.98
S.D. 0.00 0.00 0.00 2.06 20.19 50.32 74.47 66.37 92.72 4.97 0.00 0.00 142.86
SKEW 0.00 0.00 0.00 3.91 1.34 0.96 -0.07 0.04 7.55 3.24 0.00 0.00 0.53
MAX 0.00 0.00 0.00 12.50 81.50 256.73 449.00 399.00 877.50 24.00 0.00 0.00 1024.95
MIN 0.00 0.00 0.00 0.00 0.00 4.50 33.50 104.50 0.00 0.00 0.00 0.00 319.00
NO YRS 90 94 94 95 95 95 90 93 90 86 86 89 64