SWAN FALLS POWER HOUSE, IDAHO

Monthly Total Cooling Degree Days

(108928)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1935 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 441.75 a 367.57 c 186.00 19.00 0.00 0.00 1014.32
1936 0.00 0.00 n 0.00 e 30.50 128.65 a 257.00 553.57 c 451.10 b 99.11 b 3.62 a 0.00 a 0.00 1523.55
1937 0.00 a 0.00 a 0.00 a 1.50 46.00 142.00 540.50 365.50 192.00 0.50 0.00 0.00 a 1288.00
1938 0.00 c 0.00 c 0.00 a 1.50 48.22 d 196.61 b 444.16 b 357.02 a 231.21 a 4.65 a 0.00 0.00 1283.36
1939 0.00 0.00 0.00 12.00 75.00 119.00 478.00 457.50 123.50 0.50 0.00 0.00 1265.50
1940 0.00 0.00 0.00 0.50 82.50 347.50 507.37 a 466.50 151.50 1.50 0.00 0.00 1557.37
1941 0.00 0.00 a 0.00 a 3.50 63.00 121.50 488.25 a 330.50 62.50 0.00 0.00 b 0.00 1069.25
1942 0.00 0.00 0.00 a 4.50 24.00 60.50 501.17 a 411.50 130.50 11.50 0.00 0.00 1143.67
1943 0.00 0.00 0.00 10.50 24.59 b 77.50 368.38 a 351.00 166.50 33.50 0.00 0.00 1031.97
1944 0.00 0.00 0.00 0.00 57.00 48.62 a 356.00 328.50 141.00 8.50 0.00 0.00 a 939.62
1945 0.00 d 0.00 a 0.00 a 1.00 27.50 81.21 a 459.83 a 395.25 a 92.00 20.00 0.00 0.00 1076.79
1946 0.00 0.00 0.00 10.56 c 32.66 c 181.00 475.50 382.50 79.50 8.50 0.00 0.00 1170.22
1947 0.00 a 0.00 0.00 5.50 108.00 74.50 495.50 359.00 112.00 11.88 a 0.00 0.00 1166.38
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 317.00 121.50 5.50 0.00 0.00 b 444.00
1949 0.00 0.00 0.00 c 10.34 a 107.97 b 217.50 467.00 411.00 178.50 0.00 0.00 0.00 1392.31
1950 0.00 0.00 0.00 0.00 31.00 a 169.50 447.50 400.00 159.00 14.00 0.00 0.00 1221.00
1951 0.00 0.00 a 0.00 3.00 39.00 157.00 512.00 380.50 125.00 2.00 0.00 0.00 1218.50
1952 0.00 0.00 0.00 16.50 43.00 158.50 446.50 448.50 182.50 22.00 0.00 0.00 1317.50
1953 0.00 0.00 0.00 10.50 4.00 77.50 516.50 407.65 a 202.50 17.00 0.00 a 0.00 1235.65
1954 0.00 0.00 0.00 3.50 124.00 143.00 504.27 a 285.50 135.00 b 7.00 0.00 b 0.00 1202.27
1955 0.00 0.00 0.00 0.00 b 33.14 b 222.93 a 386.00 493.70 d 213.75 b 11.22 b 0.00 0.00 1360.75
1956 0.00 0.00 0.00 g 11.00 107.97 b 202.00 478.00 340.50 159.00 9.00 0.00 0.00 c 1307.47
1957 0.00 0.00 0.00 b 2.59 a 47.00 242.59 a 458.50 367.50 179.00 8.00 0.00 0.00 1305.17
1958 0.00 0.00 0.00 0.00 201.00 207.00 449.50 504.50 136.00 16.50 0.00 0.00 1514.50
1959 0.00 0.00 0.00 5.00 24.50 308.00 541.50 370.00 117.00 0.00 0.00 0.00 1366.00
1960 0.00 0.00 0.00 5.50 49.50 305.00 625.50 322.00 201.50 8.50 0.00 0.00 1517.50
1961 0.00 0.00 0.00 1.50 90.50 410.00 551.50 535.50 51.50 7.75 a 0.00 0.00 1648.25
1962 0.00 0.00 0.00 24.50 8.00 211.50 393.00 354.00 158.50 2.00 0.00 0.00 1151.50
1963 0.00 0.00 0.00 1.00 99.00 146.50 393.50 416.50 230.50 42.00 0.00 0.00 1329.00
1964 0.00 0.00 0.00 0.00 a 58.50 132.50 497.00 347.50 67.00 6.50 0.00 0.00 1109.00
1965 0.00 0.00 0.00 3.00 40.50 177.00 412.00 308.00 33.50 16.00 0.00 0.00 990.00
1966 0.00 0.00 3.50 4.00 142.00 196.00 459.00 417.00 214.00 0.00 0.00 0.00 1435.50
1967 0.00 0.00 0.00 0.00 92.50 180.50 577.50 544.00 259.66 a 0.00 0.00 0.00 1654.16
1968 0.00 0.00 0.00 9.50 45.50 248.50 516.50 261.50 124.50 4.00 0.00 0.00 1210.00
1969 0.00 0.00 0.00 5.50 137.50 222.00 464.50 446.00 146.00 0.00 0.00 0.00 1421.50
1970 0.00 0.00 0.00 0.00 60.00 262.50 367.00 g 484.00 75.00 11.50 0.00 0.00 893.00
1971 0.00 0.00 0.00 0.00 60.00 160.50 441.50 545.00 78.50 5.00 0.00 0.00 1290.50
1972 0.00 0.00 0.00 0.00 75.00 224.50 417.50 426.50 69.00 3.00 0.00 0.00 1215.50
1973 0.00 0.00 0.00 0.52 a 113.50 258.00 489.00 412.00 104.00 3.50 0.00 0.00 1380.52
1974 0.00 0.00 a 0.00 0.00 53.50 362.59 a 432.50 380.50 181.15 d 4.00 0.00 f 0.00 1414.24
1975 0.00 0.00 0.00 0.00 41.50 150.50 539.50 309.00 147.00 27.00 0.00 0.00 1214.50
1976 0.00 0.00 0.00 0.00 81.00 167.50 477.00 240.50 128.50 9.00 0.00 0.00 1103.50
1977 0.00 0.00 0.00 48.50 27.50 336.00 422.50 434.50 121.00 3.00 0.00 0.00 a 1393.00
1978 0.00 0.00 5.50 0.00 d 22.00 190.00 420.00 380.50 124.50 3.50 0.00 0.00 1146.00
1979 0.00 0.00 0.00 0.00 90.00 268.50 494.50 372.00 204.00 27.00 0.00 0.00 j 1456.00
1980 0.00 0.00 0.00 25.50 62.00 162.00 440.00 313.50 101.50 12.00 0.00 0.00 1116.50
1981 0.00 0.00 0.00 3.50 34.50 177.50 424.00 489.50 201.00 0.00 0.00 0.00 1330.00
1982 0.00 0.00 0.00 0.00 33.50 235.00 325.50 407.00 0.00 z 2.00 0.00 0.00 1003.00
1983 0.00 0.00 0.00 0.00 94.00 158.00 345.00 447.50 120.50 1.00 0.00 0.00 1166.00
1984 0.00 0.00 0.00 5.50 38.00 112.50 468.50 480.00 114.00 8.00 0.00 0.00 c 1226.50
1985 0.00 0.00 0.00 22.00 86.00 216.50 i 610.50 334.00 34.00 0.00 0.00 0.00 1086.50
1986 0.00 0.00 0.00 5.00 138.50 376.00 360.00 516.00 83.50 0.00 0.00 c 0.00 1479.00
1987 0.00 0.00 0.00 0.00 z 144.00 310.50 345.50 342.00 160.50 12.50 0.00 0.00 1315.00
1988 0.00 0.00 0.00 9.50 99.00 310.50 484.50 296.50 103.50 60.50 0.00 0.00 1364.00
1989 0.00 0.00 0.00 24.00 45.00 286.00 534.00 321.50 130.00 9.50 0.00 0.00 1350.00
1990 0.00 0.00 0.00 27.50 20.50 241.00 479.00 392.00 252.50 18.00 0.00 0.00 1430.50
1991 0.00 0.00 0.00 0.00 8.50 122.50 488.50 499.50 149.00 8.50 0.00 0.00 1276.50
1992 0.00 0.00 0.00 18.00 153.97 a 255.50 291.00 468.50 124.50 31.50 0.00 0.00 1342.97
1993 0.00 0.00 0.00 0.00 155.50 133.00 161.50 255.50 137.50 19.50 0.00 0.00 862.50
1994 0.00 0.00 0.00 29.50 112.00 274.00 538.50 478.50 181.50 3.00 0.00 0.00 1617.00
1995 0.00 0.00 0.00 0.00 30.50 162.00 410.50 307.50 170.50 0.00 l 0.00 0.00 1081.00
1996 0.00 0.00 0.00 3.50 17.50 181.50 450.50 353.00 98.00 39.00 0.00 0.00 1143.00
1997 0.00 0.00 0.00 z 0.00 98.50 140.50 355.50 397.00 164.48 a 20.00 0.00 0.00 1175.98
1998 0.00 0.00 0.00 5.50 20.50 0.00 z 0.00 z 457.00 229.50 4.00 0.00 0.00 716.50
1999 0.00 0.00 0.00 0.00 44.36 b 177.50 360.12 a 397.50 99.00 4.28 b 0.00 0.00 1082.75
2000 0.00 0.00 0.00 2.50 52.50 234.00 438.28 b 422.12 a 76.11 c 0.00 z 0.50 0.00 b 1226.00
2001 0.00 0.00 0.00 12.50 119.87 a 233.65 d 384.73 c 491.50 185.56 c 8.02 b 0.00 0.00 1435.83
2002 0.00 0.00 0.00 0.00 87.00 289.14 a 546.00 238.00 f 122.00 0.00 a 0.00 0.00 1044.14
2003 0.00 0.00 0.00 3.00 115.50 259.50 577.00 450.50 148.00 38.50 0.00 0.00 1592.00
2004 0.00 0.00 0.00 0.50 41.00 210.50 475.00 391.63 a 89.50 12.00 0.00 a 0.00 1220.13
2005 0.00 0.00 0.00 0.00 33.50 110.50 467.50 437.88 c 86.00 0.00 0.00 0.00 1135.38
2006 0.00 0.00 0.00 0.00 88.00 271.00 575.50 347.50 117.00 1.00 0.00 0.00 1400.00
2007 0.00 0.00 0.00 z 7.00 87.50 233.33 c 613.50 399.38 a 103.50 3.50 0.00 0.00 1447.72
2008 0.00 0.00 0.00 3.00 50.00 207.32 b 440.50 386.00 74.50 15.00 0.00 0.00 1176.32
2009 0.00 0.00 a 0.00 6.43 b 107.98 a 131.00 433.00 330.50 230.50 0.00 a 0.00 0.00 1239.41
2010 0.00 0.00 0.00 0.00 a 10.33 a 110.50 392.15 a 236.50 j 75.50 g 31.50 0.00 0.00 544.48
2011 0.00 a 0.00 c 0.00 c 0.00 b 2.58 a 105.52 a 360.63 a 417.98 a 186.21 a 26.00 0.00 a 0.00 a 1098.92
2012 0.00 c 0.00 c 0.00 a 30.00 c 44.95 a 160.50 512.50 453.38 c 119.50 5.68 a 0.00 0.00 a 1326.51
2013 0.00 0.00 0.00 b 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 0.12 6.55 67.69 199.93 459.07 396.95 139.33 10.71 0.01 0.00 1274.55
S.D. 0.00 0.00 0.75 9.71 42.94 78.36 78.70 69.66 51.86 11.93 0.06 0.00 170.86
SKEW 0.00 0.00 6.26 2.04 0.69 0.39 -0.61 0.07 0.24 1.73 8.60 0.00 0.20
MAX 0.00 0.00 5.50 48.50 201.00 410.00 625.50 545.00 259.66 60.50 0.50 0.00 1654.16
MIN 0.00 0.00 0.00 0.00 2.58 48.62 161.50 240.50 33.50 0.00 0.00 0.00 862.50
NO YRS 77 76 74 75 76 74 75 76 76 76 77 77 61