VASHON ISLAND, WASHINGTON

Monthly Total Growing Degree Days

(458802)

Base Temperature = 40 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 867.47 b 501.00 417.50 0.00 z 0.00 z 1785.97
1892 0.00 z 0.00 z 257.00 254.50 493.93 a 561.50 706.50 746.00 638.00 309.00 125.00 h 0.00 z 3966.43
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 25.00 129.50 99.50 256.00 463.50 579.64 b 705.50 773.50 591.72 a 312.00 114.50 53.00 4103.37
1899 34.00 z 75.00 88.50 214.50 343.00 500.00 711.50 592.50 0.00 z 318.50 291.00 101.00 3235.50
1900 95.50 90.50 259.00 301.00 453.00 599.50 703.00 658.00 521.00 302.50 140.00 150.50 4273.50
1901 35.00 72.50 141.50 191.50 406.10 a 432.69 d 450.00 h 400.50 m 472.00 370.50 g 112.50 l 82.50 1833.79
1902 48.00 i 101.00 f 122.50 240.50 463.50 558.00 675.00 687.50 511.00 390.50 155.00 56.63 e 3860.13
1903 78.53 a 49.50 79.50 207.50 418.00 611.00 646.50 690.00 504.50 375.62 a 166.00 74.00 3900.65
1904 73.50 23.00 76.50 341.00 427.50 550.50 413.50 m 680.50 278.50 p 401.00 247.50 109.00 2930.00
1905 52.24 d 117.00 266.50 335.00 434.00 a 586.00 743.00 695.50 576.00 260.00 152.00 70.00 4287.24
1906 101.50 95.00 177.00 360.00 433.50 537.50 824.00 723.50 546.50 401.00 159.83 a 97.50 4456.83
1907 11.22 b 87.50 77.00 247.50 525.50 592.50 762.50 667.00 513.50 371.50 225.00 90.00 4170.72
1908 65.50 75.09 a 141.50 270.50 374.50 558.50 754.50 649.00 436.00 312.50 234.50 45.00 3917.09
1909 29.00 71.50 113.50 214.00 374.00 553.50 624.00 605.50 537.50 310.50 170.50 18.50 3622.00
1910 39.00 21.26 a 209.50 261.50 438.00 484.00 634.50 559.50 466.00 359.00 141.00 85.00 3698.26
1911 35.50 14.00 134.50 181.00 394.00 486.00 691.50 493.50 f 463.00 323.50 145.50 57.50 2926.00
1912 102.50 97.50 89.50 212.00 460.00 548.50 655.50 628.00 503.50 257.50 157.00 41.85 a 3753.35
1913 7.50 33.50 84.50 246.00 397.50 553.50 653.50 702.50 498.00 285.00 147.93 a 59.50 3668.93
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 598.97 a 369.00 86.67 c 78.00 1132.63
1916 3.50 111.50 151.00 263.50 363.50 544.50 649.00 741.00 584.50 308.45 a 67.76 a 11.00 f 3788.21
1917 60.00 56.00 58.00 218.00 398.87 a 523.50 714.55 a 812.50 596.40 e 425.00 313.50 192.50 4368.82
1918 166.88 a 54.00 i 146.00 m 268.50 387.50 623.50 693.50 692.50 675.50 383.00 171.50 84.50 4146.88
1919 66.50 49.00 143.50 260.50 393.18 a 495.00 a 673.22 a 670.50 561.50 224.48 b 169.20 e 41.00 f 3706.58
1920 104.50 33.50 127.00 172.50 345.00 539.00 738.00 739.00 527.50 314.50 202.00 87.12 b 3929.62
1921 44.00 98.00 164.00 222.00 445.22 b 581.50 642.50 698.00 480.50 378.09 c 160.50 72.33 a 3986.65
1922 4.50 20.00 48.00 167.68 b 343.14 b 559.14 a 736.50 710.50 607.50 384.50 83.00 70.02 b 3734.47
1923 80.71 b 31.00 129.34 b 322.50 445.50 607.00 753.00 778.50 612.50 455.00 216.00 102.50 4533.55
1924 85.00 168.50 115.50 253.00 487.50 566.38 a 694.50 620.50 553.50 324.50 91.00 f 100.50 3969.38
1925 74.50 129.11 a 167.40 a 299.00 387.00 l 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 22.50 w 0.00 z 670.01
1926 80.50 177.00 302.00 449.00 521.50 657.50 770.50 743.48 a 513.00 433.00 248.28 a 75.50 4971.26
1927 50.38 c 73.00 113.00 256.00 365.00 622.00 734.50 755.00 549.00 391.00 138.00 33.00 4079.88
1928 106.00 86.50 238.50 264.00 512.00 567.50 738.00 673.50 528.50 347.00 172.50 46.00 4280.00
1929 7.50 15.50 144.00 183.50 409.50 530.00 672.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1962.50
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 63.00 x 101.50 183.42 a 349.82 b 526.00 571.50 328.00 q 713.00 550.18 b 172.50 g 13.50 u 36.68 a 3032.10
1932 31.00 a 67.86 d 82.00 n 221.00 g 423.31 b 610.00 c 650.47 b 298.00 q 255.50 p 245.00 n 52.00 t 15.00 y 1782.64
1933 27.00 f 18.26 e 115.65 e 180.00 g 106.50 t 109.50 x 421.50 j 761.10 b 136.00 u 200.50 p 84.00 q 25.50 z 895.02
1934 97.00 f 21.50 y 273.12 b 298.50 g 482.50 573.10 a 454.00 j 357.00 n 181.00 u 382.73 e 211.15 d 22.50 q 1922.61
1935 119.23 e 86.24 c 62.57 d 229.29 b 425.14 c 417.00 h 690.55 b 615.00 369.00 k 225.55 b 24.50 j 51.48 c 2505.06
1936 0.00 z 15.00 f 103.16 b 338.57 b 496.60 e 610.00 677.87 a 742.85 d 507.00 e 44.50 z 114.00 h 91.00 3567.04
1937 0.00 26.50 h 178.50 215.69 a 422.38 c 604.44 c 684.58 a 650.50 464.50 g 429.19 b 185.00 75.00 h 3370.28
1938 40.30 a 66.37 a 120.79 b 328.97 a 443.30 a 596.50 746.07 a 640.00 619.80 e 359.08 a 105.00 100.00 4166.18
1939 74.83 b 17.23 b 138.00 125.50 o 0.00 z 0.00 z 729.65 d 727.50 537.41 a 376.50 264.23 d 177.06 e 3042.41
1940 93.00 126.88 a 257.50 357.93 a 509.50 311.50 o 731.50 724.00 645.52 a 458.80 a 96.50 124.00 4125.12
1941 97.50 152.00 329.12 a 378.10 a 483.60 a 602.59 a 827.00 727.98 a 521.00 397.32 a 231.50 106.00 4853.71
1942 73.50 54.96 a 168.50 343.00 487.22 a 566.50 824.08 a 806.00 e 582.78 c 439.17 a 95.17 a 101.00 4541.88
1943 23.25 a 120.30 a 131.20 c 351.43 b 420.57 a 553.97 a 715.07 a 698.03 b 637.00 137.50 r 194.00 63.00 3907.80
1944 61.00 60.15 b 111.82 c 309.50 326.00 j 591.72 a 660.50 f 789.98 a 660.00 490.00 153.33 c 50.93 c 3278.44
1945 77.50 k 92.00 114.00 219.00 509.95 a 542.50 719.20 a 686.50 504.11 b 268.50 h 76.00 l 96.10 a 3483.36
1946 47.03 b 92.08 b 132.50 250.86 a 524.50 555.00 c 719.95 b 688.64 c 541.55 a 212.00 55.18 b 61.47 b 3880.76
1947 28.93 a 95.93 a 191.68 a 287.68 b 479.50 306.50 l 0.00 z 469.00 g 402.00 i 446.06 d 225.50 135.22 b 1890.50
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 668.00 702.50 692.50 498.89 c 328.50 91.50 9.50 2991.39
1949 1.50 52.50 173.00 353.50 536.50 569.00 675.00 726.36 b 616.03 a 277.50 298.93 b 63.03 a 4342.86
1950 10.00 85.00 106.00 239.00 368.00 642.50 721.78 a 757.50 576.00 331.18 a 152.50 189.00 4178.47
1951 36.50 74.50 88.72 b 332.50 456.50 674.44 c 774.47 b 706.00 589.66 a 357.53 a 162.00 26.00 4278.82
1952 41.00 86.50 115.00 306.00 462.50 533.00 748.00 765.00 636.00 443.62 b 134.00 86.50 4357.12
1953 160.00 66.50 95.50 i 261.50 455.50 529.00 724.00 742.50 603.50 436.00 218.50 82.00 f 4197.00
1954 24.00 f 114.50 90.93 a 224.00 461.50 506.00 611.50 654.50 573.00 334.28 a 279.00 86.00 3935.22
1955 46.50 43.56 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 90.06
Period of Record Statistics
MEAN 58.07 77.06 147.14 272.20 441.83 567.53 710.10 705.64 554.63 357.70 173.98 82.34 4160.59
S.D. 39.88 39.80 65.77 61.87 53.32 48.04 50.06 60.22 57.45 66.01 63.14 40.29 343.85
SKEW 0.64 0.36 0.98 0.48 -0.09 -0.12 0.34 0.03 0.14 -0.25 0.30 0.91 0.42
MAX 166.88 177.00 329.12 449.00 536.50 674.44 827.00 867.47 675.50 490.00 313.50 192.50 4971.26
MIN 0.00 14.00 48.00 167.68 343.00 432.69 611.50 559.50 436.00 212.00 55.18 9.50 3622.00
NO YRS 46 49 51 50 50 49 47 49 47 48 45 46 27