KETCHIKAN, ALASKA

Monthly Total Heating Degree Days

(504590)

Base Temperature = 65 F

File last updated on Jun 7, 2013
*** Note *** Provisional Data *** After Year/Month 201305
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
1949 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 257.50 438.50 g 530.17 a 1025.50 1813.17
1950 1372.50 777.00 773.50 683.00 556.34 c 208.50 254.00 194.00 283.00 596.00 901.50 656.00 f 6599.34
1951 1001.00 846.50 971.50 658.00 495.50 256.50 138.00 150.00 285.50 611.00 730.50 983.50 7127.50
1952 844.00 h 825.98 a 857.00 709.00 491.00 374.50 187.00 200.00 344.50 433.00 683.50 807.00 5912.48
1953 1102.00 720.00 799.00 607.00 399.50 257.50 176.50 193.00 327.22 c 506.33 d 716.50 800.50 6605.06
1954 1066.50 841.50 838.50 796.00 320.50 h 370.50 301.00 123.50 256.00 541.50 545.00 856.00 6536.00
1955 808.00 793.00 926.42 e 689.50 569.62 c 364.50 255.50 311.50 362.00 611.50 980.50 1111.50 7783.55
1956 943.00 932.00 868.50 616.50 435.00 368.00 194.00 223.00 362.50 656.54 c 739.00 883.00 7221.04
1957 1080.50 876.00 784.50 658.50 416.00 313.50 250.50 152.00 202.00 536.00 660.00 862.50 6792.00
1958 719.50 700.00 754.00 539.50 382.50 118.50 68.50 206.00 355.50 553.50 795.50 788.00 5981.00
1959 967.50 809.00 815.50 631.00 452.50 282.00 192.50 241.00 334.00 524.50 745.50 765.50 6760.50
1960 862.50 0.00 z 787.83 b 586.50 463.50 417.00 269.50 220.50 349.00 505.50 702.00 753.50 5917.33
1961 779.00 744.50 750.00 618.50 434.00 306.50 133.50 131.00 323.00 575.50 791.00 906.00 6492.50
1962 849.00 790.50 893.00 658.50 526.50 368.00 182.00 195.50 323.00 519.50 616.00 808.00 6729.50
1963 902.50 602.00 789.00 625.00 436.50 373.50 192.00 109.50 249.50 540.50 869.50 804.00 6493.50
1964 915.65 d 723.50 863.50 718.00 557.00 286.50 288.50 314.50 371.00 592.50 800.00 1190.00 7620.65
1965 1004.50 791.50 777.00 653.50 583.50 394.00 190.00 171.50 253.50 528.50 784.00 901.50 7033.00
1966 1067.00 764.50 779.00 656.50 566.50 333.50 134.00 243.00 348.50 622.00 788.00 813.50 7116.00
1967 895.50 732.00 920.00 650.50 491.00 185.50 240.00 134.50 282.00 536.00 727.00 885.50 6679.50
1968 1009.00 769.50 715.50 719.50 383.50 315.00 181.00 218.00 371.50 571.50 678.50 1045.50 6978.00
1969 1341.50 814.50 800.50 637.00 405.50 167.00 296.00 319.00 317.50 509.50 646.00 715.50 6969.50
1970 985.50 620.50 714.00 675.00 571.50 315.50 291.00 265.00 436.00 586.50 803.00 1021.00 7284.50
1971 1123.50 812.00 921.50 757.50 630.50 430.50 196.00 221.50 391.50 676.50 785.00 1113.42 a 8059.42
1972 1239.50 943.00 857.50 814.50 526.00 368.50 207.00 231.00 403.00 613.50 721.00 965.00 7889.50
1973 991.00 798.50 785.50 601.50 547.00 445.00 345.50 326.50 385.50 685.50 1034.50 897.00 7843.00
1974 1148.50 804.00 918.50 593.50 562.00 438.50 297.50 167.00 223.00 585.00 735.50 752.50 7225.50
1975 984.00 981.50 880.00 657.50 510.50 370.00 252.00 256.50 323.00 615.50 863.50 925.50 7619.50
1976 915.50 923.50 915.00 664.14 a 577.50 343.50 273.50 229.00 334.00 612.00 707.00 849.50 7344.14
1977 905.50 645.50 819.00 637.50 464.00 323.00 217.50 104.50 352.50 607.00 925.50 1154.00 7155.50
1978 1052.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 538.50 805.00 977.50 3373.50
1979 1088.10 a 974.30 a 771.50 633.50 542.00 263.50 i 180.00 118.83 a 288.62 a 496.00 a 556.50 f 885.57 a 5978.42
1980 1087.67 b 767.50 848.62 c 646.00 457.52 b 226.03 a 0.00 z 217.52 a 0.00 z 499.62 a 640.50 984.77 a 6375.75
1981 660.50 0.00 z 476.50 k 189.00 u 0.00 z 361.61 b 165.33 a 165.33 a 351.67 c 589.00 664.14 a 930.00 c 3887.58
1982 1194.57 b 0.00 z 0.00 z 760.18 b 0.00 z 0.00 z 0.00 z 0.00 z 327.78 c 606.05 a 0.00 z 0.00 z 2888.58
1983 826.50 663.50 757.95 a 589.50 473.27 a 316.11 c 240.80 c 260.92 a 420.50 593.50 0.00 z 0.00 z 5142.55
1984 817.00 758.30 b 696.50 660.50 551.05 b 380.50 283.50 242.50 377.50 621.50 858.50 1054.00 7301.35
1985 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 196.50 265.50 0.00 z 0.00 z 0.00 z 0.00 z 462.00
1986 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 357.50 480.50 b 789.31 a 792.00 2419.31
1987 839.67 b 688.07 a 0.00 z 652.00 494.97 a 353.00 175.50 153.00 344.00 540.00 674.50 829.25 a 5743.96
1988 0.00 z 0.00 z 0.00 z 651.50 495.00 350.50 285.00 211.00 382.00 522.50 694.50 901.50 4493.50
1989 973.83 b 937.50 886.50 615.50 475.00 270.50 193.50 180.50 300.50 602.00 754.00 710.00 6899.33
1990 953.00 919.50 771.38 a 592.50 438.50 305.00 158.50 168.00 339.00 674.00 913.00 1033.00 7265.38
1991 1098.50 705.00 912.50 658.50 508.00 320.50 271.00 229.00 359.50 692.00 677.50 773.00 7205.00
1992 778.50 768.00 768.50 658.50 500.50 284.00 204.50 209.50 480.00 664.00 699.00 1007.50 7022.50
1993 1019.00 737.50 834.00 612.00 358.00 280.50 154.00 138.00 289.50 491.50 739.00 752.00 6405.00
1994 768.00 973.00 735.50 542.00 450.00 265.50 160.50 94.00 320.50 553.50 822.00 916.50 6601.00
1995 861.50 785.00 821.00 550.50 403.00 274.50 181.00 272.00 228.50 570.50 774.50 898.50 6620.50
1996 1175.00 818.50 815.50 648.50 534.00 361.50 240.50 247.00 432.00 611.22 a 862.00 249.50 v 6745.72
1997 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
1998 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
1999 0.00 z 0.00 z 867.00 711.50 632.50 379.14 a 263.00 246.50 439.50 598.00 737.00 839.00 5713.14
2000 1050.50 862.50 791.00 689.00 548.50 315.00 219.50 241.50 367.50 601.50 698.50 910.00 7295.00
2001 780.50 853.50 852.00 700.50 610.00 363.00 268.00 204.50 358.00 621.00 808.00 929.50 7348.50
2002 905.50 878.00 1052.00 767.50 582.00 337.50 272.50 264.50 385.50 576.50 644.50 825.50 7491.50
2003 818.50 821.00 911.00 659.50 566.00 330.50 245.00 245.50 359.00 567.50 886.50 878.50 7288.50
2004 1038.50 807.00 805.50 621.50 411.50 230.00 146.00 132.50 401.50 629.50 772.00 891.50 6887.00
2005 975.50 820.00 769.00 589.50 369.00 257.00 259.00 186.00 377.00 616.50 781.00 837.00 6836.50
2006 891.50 880.50 975.50 736.00 525.00 294.00 212.00 297.50 374.50 615.50 1011.50 838.00 7651.50
2007 926.00 807.00 890.00 699.50 549.00 322.50 235.00 206.00 382.00 636.00 810.50 1020.00 7483.50
2008 1010.00 883.50 863.50 767.00 492.50 403.50 308.50 175.50 g 321.00 606.00 683.00 1063.50 7402.00
2009 985.50 917.00 956.00 682.50 494.00 276.50 159.00 197.00 388.50 611.00 782.50 1030.00 7479.50
2010 746.00 679.00 784.50 650.50 461.00 351.00 195.50 181.00 333.50 563.50 785.50 928.50 6659.50
2011 941.00 924.00 857.50 721.00 498.50 299.50 255.00 257.00 337.00 594.00 859.00 881.50 7425.00
2012 1021.50 810.50 904.50 639.00 588.50 370.50 233.00 233.00 351.00 682.00 754.50 961.50 7549.50
2013 839.50 730.50 860.00 697.50 355.00 g 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3127.50
Period of Record Statistics
MEAN 966.73 806.51 836.97 660.62 498.97 320.97 220.44 209.07 342.06 581.95 765.28 906.37 7125.44
S.D. 146.39 91.18 73.74 59.13 68.67 66.40 55.03 56.50 55.29 55.79 101.22 111.64 446.85
SKEW 0.45 -0.04 0.44 0.39 -0.14 -0.66 -0.14 -0.03 -0.30 -0.20 0.37 0.46 -0.16
MAX 1372.50 981.50 1052.00 814.50 632.50 445.00 345.50 326.50 480.00 692.00 1034.50 1190.00 8059.42
MIN 660.50 602.00 696.50 539.50 358.00 118.50 68.50 94.00 202.00 433.00 530.17 710.00 5981.00
NO YRS 57 54 55 58 55 56 57 57 59 60 58 57 44