VASHON ISLAND, WASHINGTON

Monthly Total Heating Degree Days

(458802)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 195502
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
1891 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 32.07 b 255.50 357.50 0.00 z 0.00 z 645.07
1892 0.00 z 0.00 z 518.00 496.00 284.68 a 210.50 106.50 62.00 150.50 468.50 430.00 h 0.00 z 2296.68
1893 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
1894 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
1895 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
1896 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
1897 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
1898 811.00 579.50 686.00 494.00 312.50 173.57 b 89.50 54.50 165.00 a 463.00 638.50 783.50 5250.57
1899 91.00 z 754.00 698.50 535.50 432.00 250.00 94.00 183.50 0.00 z 456.50 459.00 698.50 4561.50
1900 700.00 672.00 516.00 449.00 322.00 150.50 83.00 117.50 229.00 472.50 663.50 643.50 5018.50
1901 805.00 674.00 635.00 558.50 368.90 a 317.31 d 125.00 h 53.00 m 279.00 229.50 g 337.50 l 728.50 4366.21
1902 562.00 i 463.50 f 655.50 510.00 311.50 206.00 119.00 109.00 239.00 384.50 595.50 748.17 e 3878.17
1903 728.50 a 727.00 728.50 542.50 358.50 151.50 133.00 95.00 245.50 399.38 a 599.50 713.00 5421.88
1904 740.00 743.00 716.00 409.00 347.50 206.00 52.00 m 109.00 74.00 p 374.00 502.50 678.50 4825.50
1905 779.59 d 641.00 508.50 415.00 341.00 a 165.00 70.00 94.00 174.00 517.00 612.00 728.00 5045.09
1906 706.00 609.50 651.00 390.00 341.50 215.50 16.50 61.00 204.50 374.00 609.83 a 702.50 4881.83
1907 951.91 b 643.00 703.00 502.50 249.50 160.50 45.50 118.00 239.00 403.50 527.50 702.00 5245.91
1908 727.50 681.50 a 637.50 479.50 400.50 194.00 55.50 136.00 314.00 462.50 515.50 775.50 5379.50
1909 940.00 652.00 662.00 536.00 401.00 196.50 151.00 170.00 213.00 464.50 597.50 885.00 5868.50
1910 832.00 749.26 a 568.00 488.50 337.00 266.00 146.50 215.50 284.00 416.00 620.00 705.50 5628.26
1911 846.50 741.50 644.00 570.00 381.00 264.00 112.00 131.50 f 287.00 451.50 639.00 752.50 5689.00
1912 736.00 644.00 703.50 538.00 315.00 202.00 126.00 148.00 248.00 517.50 593.00 751.23 a 5522.23
1913 890.00 722.00 721.00 504.00 377.50 196.50 135.00 88.00 252.00 490.00 605.17 a 740.00 5721.17
1914 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
1915 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 163.45 a 406.00 676.11 c 743.50 1989.06
1916 1053.00 667.00 635.00 486.50 411.50 213.50 129.00 66.00 169.00 466.55 a 728.28 a 687.00 f 5025.33
1917 823.50 702.50 728.00 532.00 376.13 a 230.00 89.90 a 18.50 157.20 e 356.50 436.50 588.00 5038.73
1918 633.43 a 452.50 i 304.00 m 481.50 387.50 138.00 98.00 107.00 115.50 392.00 581.00 747.00 3680.93
1919 760.00 672.50 632.50 489.50 381.82 a 255.00 a 118.83 a 117.00 193.50 559.60 b 592.20 e 750.50 f 4772.45
1920 765.50 743.00 656.00 584.00 430.00 215.00 74.50 79.00 222.50 460.50 548.00 703.91 b 5481.91
1921 764.00 636.00 621.00 533.00 336.19 b 171.50 139.50 98.50 269.50 396.91 c 620.50 837.00 a 5423.60
1922 915.50 751.00 777.50 595.71 b 443.09 b 193.97 a 78.00 88.00 153.00 390.50 673.50 855.71 b 5915.47
1923 769.12 b 773.00 665.97 b 427.50 329.50 167.50 60.00 36.50 151.00 324.50 534.50 702.00 4941.09
1924 752.50 559.50 660.00 497.00 287.50 196.55 a 120.50 159.50 210.00 450.50 533.00 f 857.00 4750.55
1925 723.00 570.89 a 613.28 a 451.00 100.00 l 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 153.00 w 0.00 z 2358.17
1926 714.50 523.00 473.00 301.50 264.00 113.50 55.50 58.38 a 238.00 342.00 502.24 a 771.00 4356.62
1927 807.11 c 637.00 663.00 498.00 410.00 136.50 76.50 69.50 204.50 384.00 615.50 868.00 5369.61
1928 735.50 658.00 536.50 486.00 265.50 185.50 86.50 107.50 224.00 428.00 584.50 781.50 5079.00
1929 954.50 840.00 632.00 569.50 365.50 220.00 109.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3690.50
1930 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
1931 112.50 x 600.00 599.85 a 400.18 b 250.50 183.00 30.00 q 86.00 205.71 b 427.50 g 233.00 u 782.75 a 3107.99
1932 858.70 a 737.76 d 355.00 n 354.00 g 351.69 b 162.78 c 132.02 b 61.50 q 98.00 p 180.00 n 199.50 t 140.50 y 2242.94
1933 679.00 f 810.78 e 668.29 e 395.50 g 168.50 t 40.50 x 108.50 j 70.02 b 89.00 u 174.50 p 245.00 q 99.50 z 1549.09
1934 536.00 f 53.50 y 501.88 b 276.50 g 293.00 178.45 a 73.50 j 73.50 n 55.00 u 394.06 e 545.77 d 348.00 q 1913.15
1935 783.94 e 619.92 c 722.76 d 523.93 b 349.86 c 137.50 h 122.93 b 169.00 118.00 k 594.88 b 544.00 j 777.21 c 4664.43
1936 0.00 z 749.00 f 717.28 b 416.25 b 280.19 e 144.50 99.20 a 56.83 d 243.00 e 55.50 z 446.50 h 723.50 2680.75
1937 1118.00 519.00 h 600.50 534.31 a 352.62 c 153.33 c 103.33 a 128.00 125.00 g 345.81 b 571.00 531.50 h 3906.91
1938 779.65 a 660.59 a 662.22 b 421.03 a 331.70 a 159.50 74.40 a 136.50 130.20 e 415.92 a 671.00 727.50 5170.22
1939 720.48 b 754.38 b 655.00 249.50 o 0.00 z 0.00 z 75.20 d 85.00 212.59 a 399.50 485.77 d 618.81 e 4006.73
1940 719.00 602.79 a 517.50 392.07 a 265.50 66.50 o 63.00 79.00 111.72 a 317.75 a 692.00 679.00 4439.33
1941 692.00 548.00 445.88 a 371.90 a 291.92 a 153.10 a 37.00 76.47 a 229.00 377.68 a 521.00 721.00 4464.95
1942 779.50 664.22 a 607.00 407.00 287.78 a 196.50 31.00 a 39.35 e 167.78 c 335.83 a 660.52 a 705.00 4881.48
1943 947.57 a 592.15 a 646.57 c 398.57 b 354.43 a 200.17 a 74.40 a 84.98 b 132.00 189.50 r 557.50 749.50 4737.85
1944 775.00 675.06 b 674.25 c 440.50 204.50 j 180.52 a 42.00 f 42.37 a 127.50 285.00 601.67 c 808.77 c 4610.62
1945 453.00 k 627.50 669.00 531.00 267.12 a 215.50 75.95 a 98.00 245.89 b 307.00 h 385.50 l 755.88 a 3485.84
1946 773.93 b 633.77 b 644.00 499.14 a 250.50 195.56 c 72.16 b 89.12 c 210.00 a 564.00 747.86 b 833.79 b 5513.82
1947 911.92 a 634.67 a 591.07 a 462.32 b 296.50 143.50 l 0.00 z 135.00 g 139.00 i 328.94 d 528.00 645.66 b 4399.07
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 106.50 83.00 94.00 253.89 c 446.50 664.50 875.50 2523.89
1949 1024.50 759.00 602.00 397.50 238.50 181.00 110.50 76.43 b 149.48 a 497.50 451.07 b 784.30 a 5271.79
1950 1167.50 678.00 680.00 511.00 407.00 123.00 62.52 a 49.50 181.50 443.82 a 611.00 602.50 5517.33
1951 828.00 657.00 760.57 b 417.50 318.50 101.67 c 50.78 b 86.00 169.14 a 417.98 a 593.00 854.00 5254.13
1952 849.00 667.50 664.00 444.00 312.50 217.00 66.50 61.50 129.00 331.38 b 653.00 704.50 5099.88
1953 620.00 642.00 459.00 i 488.50 326.50 221.00 75.00 50.00 154.00 339.00 531.50 549.00 f 3447.50
1954 706.00 f 592.00 698.02 a 526.00 314.00 244.00 165.50 121.50 177.00 440.72 a 478.00 715.50 4472.23
1955 767.00 704.15 a 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 1471.15
Period of Record Statistics
MEAN 814.80 669.96 638.69 478.67 334.20 189.37 91.34 93.43 201.69 418.88 587.44 744.68 5250.48
S.D. 117.72 68.91 73.75 62.70 53.13 43.16 33.64 41.47 50.82 68.42 72.72 70.76 368.48
SKEW 1.12 0.21 -0.72 -0.42 0.13 0.32 0.08 0.75 0.09 0.43 -0.08 0.07 -0.47
MAX 1167.50 840.00 777.50 595.71 443.09 317.31 165.50 215.50 314.00 594.88 747.86 885.00 5915.47
MIN 620.00 523.00 445.88 301.50 238.50 101.67 16.50 18.50 111.72 285.00 436.50 588.00 4356.62
NO YRS 46 49 51 50 50 49 47 49 47 48 45 46 27