OLYMPIA WSO AP, WASHINGTON

Monthly Total Heating Degree Days

(456114)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 138.00 117.00 133.00 268.00 495.00 709.50 923.50 2784.00
1949 1149.50 786.00 646.00 480.50 265.50 218.00 129.50 113.00 188.50 552.00 486.00 824.50 5839.00
1950 1214.50 715.00 728.50 588.00 432.00 165.50 86.50 67.50 225.50 499.50 647.00 619.00 5988.50
1951 861.00 683.50 804.00 470.00 353.00 149.50 67.00 105.00 182.00 453.50 660.50 894.00 5683.00
1952 908.00 731.50 708.00 520.50 350.50 254.50 81.50 117.00 170.50 376.50 749.50 782.50 5750.50
1953 649.50 684.00 683.50 547.50 382.00 269.50 102.00 94.50 206.50 404.00 579.00 744.50 5346.50
1954 912.50 653.00 757.50 584.00 375.00 295.50 174.50 173.50 217.50 490.50 526.50 800.50 5960.50
1955 817.00 760.50 809.50 642.50 434.50 237.00 167.00 141.50 272.00 461.50 777.00 846.50 6366.50
1956 839.00 871.50 758.50 467.00 256.00 252.50 82.50 79.50 242.50 502.00 706.50 765.50 5823.00
1957 1016.00 730.00 655.50 433.00 230.50 159.00 111.50 97.00 85.50 444.00 660.00 702.00 5324.00
1958 692.50 503.00 671.50 489.50 193.00 91.00 8.00 24.00 207.00 390.50 658.50 658.50 4587.00
1959 785.00 687.00 669.00 501.50 393.50 185.50 81.00 136.50 242.00 429.00 689.00 814.50 5613.50
1960 885.00 719.00 664.00 478.50 400.00 201.00 64.50 143.00 258.00 432.00 699.00 843.50 5787.50
1961 718.00 585.50 636.50 541.50 388.50 141.50 66.50 22.50 273.50 514.50 777.00 821.00 5486.50
1962 884.50 679.50 754.00 484.50 477.50 219.50 150.00 103.00 201.50 434.50 584.50 738.00 5711.00
1963 993.00 528.00 712.00 545.00 374.50 254.00 99.50 60.00 92.00 392.00 607.50 727.50 5385.00
1964 782.50 754.00 710.50 614.00 467.00 269.00 133.50 156.50 274.50 458.00 720.50 950.00 6290.00
1965 811.00 658.50 659.00 480.50 416.50 181.50 55.00 54.00 306.00 365.00 552.50 827.00 5366.50
1966 795.50 683.00 657.00 479.00 385.50 262.50 134.50 105.00 170.00 495.00 630.50 710.00 5507.50
1967 753.50 663.00 744.50 607.00 355.50 102.50 57.50 15.50 100.50 387.50 638.00 795.50 5220.50
1968 827.50 613.50 584.00 541.00 342.00 209.00 67.00 119.00 221.00 509.50 615.50 912.00 5561.00
1969 1057.00 751.50 638.50 507.50 281.50 80.50 102.50 142.00 190.50 501.50 622.00 767.00 5642.00
1970 834.50 624.50 671.00 599.50 409.50 154.00 71.00 106.50 298.50 541.50 679.00 874.00 5863.50
1971 818.00 722.50 777.50 569.00 352.50 310.50 116.50 53.50 293.50 509.00 644.50 898.50 6065.50
1972 961.00 759.00 611.00 636.50 320.50 211.50 90.00 73.50 302.50 574.50 659.50 916.50 6116.00
1973 883.50 688.00 667.50 534.50 352.00 229.00 103.50 177.00 192.00 470.50 756.50 759.50 5813.50
1974 857.00 648.50 631.00 552.50 409.50 166.50 109.50 56.00 81.00 479.50 642.00 771.50 5404.50
1975 825.00 718.00 760.00 630.00 387.50 229.50 77.50 143.50 216.00 495.50 710.00 817.50 6010.00
1976 773.50 746.00 767.50 571.50 418.50 305.00 109.00 135.50 184.00 478.00 656.50 804.00 5949.00
1977 908.00 554.00 668.50 444.50 422.50 167.50 172.00 94.50 249.50 512.00 740.00 838.50 5771.50
1978 719.00 601.50 593.50 508.50 376.50 97.00 57.50 83.50 247.50 449.00 812.50 959.00 5505.00
1979 1056.00 691.50 542.50 463.50 314.00 195.00 66.00 76.50 173.50 414.00 745.50 735.50 5473.50
1980 1035.00 731.50 713.00 484.50 379.00 260.00 86.50 103.00 166.50 408.00 556.50 661.00 5584.50
1981 709.50 603.50 557.00 482.00 344.00 219.00 105.50 54.00 167.50 475.00 592.50 785.00 5094.50
1982 838.50 684.00 694.00 576.50 337.00 108.50 82.50 70.00 176.50 442.00 745.50 817.50 5572.50
1983 696.50 553.00 544.00 482.00 281.00 190.00 103.00 44.00 263.50 492.50 571.50 966.00 5187.00
1984 723.00 638.50 567.50 551.00 416.00 218.50 85.00 71.00 211.50 516.50 650.50 918.50 5567.50
1985 909.50 774.00 711.00 482.50 327.00 186.50 17.50 75.00 252.00 491.00 935.50 962.00 6123.50
1986 713.00 694.50 551.00 561.50 339.50 134.50 166.00 27.50 251.50 421.00 648.50 814.50 5323.00
1987 815.50 610.50 589.50 451.00 301.50 168.50 105.50 79.00 158.00 391.00 568.00 849.50 5087.50
1988 839.50 654.50 657.50 498.50 367.00 256.00 114.00 112.50 248.50 348.50 662.50 796.50 5555.50
1989 796.00 890.50 743.00 424.00 343.50 158.00 135.00 94.00 171.00 475.50 610.00 742.00 5582.50
1990 765.50 774.00 647.50 463.50 389.00 226.00 43.00 35.50 122.50 513.50 629.50 1006.00 5615.50
1991 864.50 559.50 732.00 558.00 408.50 279.50 76.50 62.00 165.50 486.50 611.50 743.00 5547.00
1992 737.50 575.00 532.50 439.50 239.50 110.50 54.00 61.00 211.00 423.50 639.00 869.50 4892.50
1993 933.50 743.00 617.50 476.00 202.50 177.00 146.00 72.50 181.00 369.00 777.50 778.00 5473.50
1994 685.00 718.00 574.50 431.00 284.50 177.00 37.00 46.00 96.00 494.00 766.50 830.50 5140.00
1995 763.50 625.50 627.00 494.50 244.00 154.00 44.50 116.50 91.50 442.00 524.50 772.50 4900.00
1996 808.00 723.50 628.50 462.50 444.00 229.50 72.85 a 78.00 265.00 491.50 683.50 815.09 b 5701.94
1997 789.00 679.00 638.50 516.00 e 264.69 e 215.00 74.50 34.00 132.50 468.50 582.50 816.50 5210.69
1998 762.50 606.00 620.00 507.00 362.00 188.50 32.50 64.00 149.50 469.00 605.50 842.00 5208.50
1999 764.50 684.50 696.00 561.50 452.00 247.50 134.00 60.50 239.00 489.00 577.00 752.50 5658.00
2000 851.50 686.00 686.50 468.00 360.50 181.50 92.50 127.50 230.00 482.50 772.50 818.00 5757.00
2001 832.50 761.00 697.00 576.50 358.00 280.50 145.00 90.50 225.00 516.50 607.50 820.00 5910.00
2002 799.50 717.50 761.00 552.00 432.00 183.00 86.00 101.00 224.50 499.50 613.50 739.50 5709.00
2003 672.50 695.00 595.50 531.50 378.50 166.00 57.00 57.50 158.50 372.00 740.50 798.50 5223.00
2004 800.50 671.50 589.00 443.00 315.50 154.00 53.50 23.50 238.50 411.00 658.00 741.50 5099.50
2005 747.50 713.50 546.50 464.00 267.50 199.00 71.00 48.00 253.50 398.00 695.00 796.50 5200.00
2006 689.00 725.50 663.00 506.50 310.00 135.50 53.00 j 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3029.50
Period of Record Statistics
MEAN 833.28 684.25 664.16 516.50 352.85 196.70 91.92 86.39 204.88 460.31 661.50 811.96 5563.78
S.D. 116.50 75.88 71.06 56.22 66.23 55.87 38.19 39.49 58.29 51.52 81.83 79.84 357.05
SKEW 1.11 -0.02 0.02 0.44 -0.46 0.00 0.26 0.28 -0.41 -0.29 0.57 0.21 -0.16
MAX 1214.50 890.50 809.50 642.50 477.50 310.50 174.50 177.00 306.00 574.50 935.50 1006.00 6366.50
MIN 649.50 503.00 532.50 424.00 193.00 80.50 8.00 15.50 81.00 348.50 486.00 619.00 4587.00
NO YRS 58 58 58 58 58 59 58 58 58 58 58 58 57