ADAK, ALASKA

Monthly Total Heating Degree Days

(500026)

Base Temperature = 65 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 199603
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 553.00 740.50 852.00 938.00 3083.50
1950 844.50 885.00 951.00 846.00 795.00 619.14 a 456.50 386.50 551.00 714.50 834.83 a 917.50 8801.46
1951 978.00 805.50 916.50 837.93 a 757.50 596.50 480.50 413.50 508.00 660.00 795.50 893.00 8642.43
1952 911.00 961.00 980.50 859.00 698.00 618.10 a 555.00 428.00 532.50 684.50 873.21 b 1039.00 9139.82
1953 992.50 961.50 1004.00 835.00 801.00 562.00 466.00 354.00 484.14 a 723.50 836.00 1062.00 9081.64
1954 993.00 962.50 925.00 813.00 768.00 656.50 531.00 466.50 468.00 764.00 853.50 917.00 9118.00
1955 1057.50 846.50 930.00 837.50 817.50 646.00 526.50 404.50 527.00 759.00 800.50 895.00 9047.50
1956 944.00 805.50 941.00 859.00 766.00 625.00 442.50 343.50 464.00 632.00 864.50 956.00 8643.00
1957 828.50 877.50 901.50 786.00 715.50 602.00 519.50 423.00 530.50 671.00 865.00 962.00 8682.00
1958 1089.50 904.50 894.00 814.00 759.00 627.00 541.50 457.50 502.00 673.00 874.00 945.50 9081.50
1959 941.50 890.00 1004.50 818.50 743.50 650.50 537.00 400.00 452.50 653.50 858.50 1032.50 8982.50
1960 990.00 945.00 911.00 908.00 790.00 640.50 481.50 442.00 497.50 703.50 880.50 1005.50 9195.00
1961 992.00 928.00 1006.50 790.50 704.50 555.00 486.00 466.00 484.00 694.00 802.50 915.50 8824.50
1962 1001.50 809.00 862.00 761.50 669.00 520.00 376.50 326.50 531.50 711.00 907.50 920.50 8396.50
1963 894.50 905.50 875.00 819.50 714.00 633.50 444.00 0.00 z 491.00 703.00 804.00 983.00 8267.00
1964 1053.00 1026.00 919.00 867.50 747.50 606.50 538.50 491.50 519.00 704.50 882.00 901.00 9256.00
1965 1002.50 845.50 866.50 753.50 732.50 582.00 462.00 378.00 512.50 690.50 777.00 965.00 8567.50
1966 965.00 867.00 960.50 775.00 728.50 616.00 535.00 490.50 472.50 730.50 728.00 980.00 8848.50
1967 1034.50 966.00 883.50 758.50 650.00 563.50 339.50 401.50 543.50 701.00 802.00 977.00 8620.50
1968 906.50 959.00 960.00 857.50 720.50 578.50 456.00 478.50 528.50 699.50 870.00 876.50 8891.00
1969 943.00 903.50 935.00 833.00 768.00 634.50 471.50 298.00 520.00 704.50 858.00 1088.50 8957.50
1970 995.00 874.00 983.50 854.00 711.50 597.50 515.50 418.00 0.00 z 633.50 714.00 0.00 z 7296.50
1971 971.50 980.50 972.00 866.50 808.50 0.00 z 632.00 495.50 522.00 0.00 z 462.00 n 0.00 z 6248.50
1972 993.50 920.50 966.50 814.00 794.00 607.50 489.50 453.00 0.00 z 742.00 895.50 0.00 z 7676.00
1973 1068.50 0.00 z 932.50 0.00 z 826.50 641.00 526.50 468.50 545.00 685.50 758.50 1000.50 7453.00
1974 936.50 934.50 882.00 861.00 772.50 625.50 463.50 454.50 515.00 726.00 816.00 1000.00 8987.00
1975 1107.50 951.50 1052.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 832.50 964.00 4907.50
1976 523.00 o 392.00 q 1008.00 925.00 792.50 659.50 544.00 514.00 590.50 747.50 440.00 o 0.00 z 5781.00
1977 1056.50 963.50 1028.50 895.50 788.00 553.50 454.50 407.00 0.00 z 679.00 880.50 929.00 8635.50
1978 0.00 z 984.00 958.00 784.00 731.00 621.50 522.50 449.50 0.00 z 669.00 0.00 z 935.50 6655.00
1979 1007.50 860.00 955.00 808.00 0.00 z 488.00 466.50 0.00 z 466.00 689.00 847.50 931.50 7519.00
1980 0.00 z 0.00 z 920.50 913.00 769.50 565.50 446.00 461.50 512.00 748.50 854.00 917.00 7107.50
1981 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
1982 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 595.50 539.00 441.00 545.69 a 657.00 798.50 1045.50 4622.19
1983 1109.50 928.50 959.50 826.00 734.50 590.17 a 489.00 344.00 496.55 a 650.50 868.00 893.00 8889.22
1984 988.00 1016.00 0.00 z 831.50 700.00 524.50 408.50 0.00 z 396.50 617.00 0.00 z 851.50 6333.50
1985 915.50 855.50 1044.00 821.50 720.50 589.50 463.50 0.00 z 487.00 0.00 z 0.00 z 0.00 z 5897.00
1986 1086.50 866.50 865.50 789.00 716.50 609.00 421.00 0.00 z 458.00 0.00 z 785.50 0.00 z 6597.50
1987 0.00 z 950.50 0.00 z 0.00 z 739.00 588.50 0.00 z 447.50 0.00 z 702.00 0.00 z 0.00 z 3427.50
1988 0.00 z 948.00 1023.50 875.00 759.00 0.00 z 469.50 0.00 z 0.00 z 659.00 837.00 0.00 z 5571.00
1989 1056.00 832.00 919.50 0.00 z 707.50 0.00 z 462.00 0.00 z 498.50 612.00 0.00 z 965.00 6052.50
1990 1018.50 966.52 a 923.00 856.50 738.50 586.00 435.00 408.50 592.50 703.50 773.50 0.00 z 8002.02
1991 955.00 980.00 915.00 864.50 753.00 620.00 488.50 417.50 543.00 690.00 0.00 z 1007.50 8234.00
1992 0.00 z 891.00 998.00 859.50 740.00 619.00 0.00 z 503.00 534.00 736.00 892.50 971.00 7744.00
1993 1045.00 869.50 946.00 882.50 782.50 609.00 520.50 457.00 546.50 731.50 861.50 1099.00 9350.50
1994 987.50 808.50 1058.50 886.00 804.00 510.50 f 306.00 k 317.00 h 361.50 h 466.50 k 584.50 g 636.00 k 4544.50
1995 642.50 m 594.50 i 657.00 i 847.76 a 558.00 i 496.00 g 386.00 h 389.16 c 347.00 h 726.71 e 638.50 f 605.50 i 1963.63
1996 504.00 m 684.50 g 607.50 i 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
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 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
2000 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
2001 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
2002 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
2003 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
2004 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
2005 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
2006 0.00 z 0.00 z 0.00 z 835.50 757.00 549.83 a 304.00 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2142.33
Period of Record Statistics
MEAN 990.82 910.88 949.71 837.24 749.80 599.33 485.09 427.19 511.39 695.68 834.28 962.29 8909.25
S.D. 67.54 59.55 52.81 41.79 39.98 38.61 53.27 51.79 38.95 37.94 47.10 59.75 245.55
SKEW -0.32 -0.14 0.27 -0.09 -0.19 -0.80 -0.12 -0.55 -0.42 -0.30 -0.74 0.49 -0.25
MAX 1109.50 1026.00 1058.50 925.00 826.50 659.50 632.00 514.00 592.50 764.00 907.50 1099.00 9350.50
MIN 828.50 805.50 862.00 753.50 650.00 488.00 339.50 298.00 396.50 612.00 714.00 851.50 8396.50
NO YRS 37 40 41 41 42 40 40 36 37 41 36 35 22