VASHON ISLAND, WASHINGTON

Monthly Total Growing Degree Days

(458802)

Base Temperature = 50 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 557.47 b 204.50 115.00 0.00 z 0.00 z 876.97
1892 0.00 z 0.00 z 35.50 36.00 191.68 a 264.50 396.50 436.00 338.00 75.50 9.00 h 0.00 z 1773.68
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 0.00 4.50 2.50 27.50 153.50 280.18 b 395.50 463.50 292.24 a 28.00 1.50 2.00 1650.92
1899 0.00 z 0.00 0.00 13.50 64.50 200.00 401.50 282.50 0.00 z 57.00 23.00 5.00 1047.00
1900 6.00 0.00 27.00 50.50 146.00 299.50 393.00 348.00 221.00 42.50 1.50 8.50 1543.50
1901 0.00 11.00 1.50 11.50 111.08 a 132.69 d 220.00 h 220.50 m 173.50 130.50 g 2.50 l 0.00 441.28
1902 0.00 i 3.50 f 1.50 17.50 156.50 259.50 365.00 377.50 214.00 90.50 1.00 0.00 e 1483.00
1903 0.00 a 0.00 0.00 9.50 118.00 311.00 336.50 380.00 205.50 81.63 a 22.00 0.00 1464.13
1904 0.50 0.00 2.00 77.50 135.00 250.50 233.50 m 370.50 138.50 p 96.00 12.50 0.00 944.50
1905 0.00 d 10.00 34.00 70.50 131.75 a 286.00 433.00 385.50 276.00 31.00 8.00 0.00 1665.75
1906 2.00 0.50 33.50 94.00 126.50 237.50 514.00 413.50 246.50 120.50 20.69 a 1.00 1810.19
1907 0.00 b 0.00 0.00 18.00 215.50 292.50 452.50 357.00 213.50 73.00 13.00 0.00 1635.00
1908 0.00 0.00 a 0.00 26.50 76.50 258.50 444.50 339.00 150.00 55.50 40.00 0.00 1390.50
1909 0.00 0.00 0.00 3.50 81.00 253.50 314.00 295.50 237.50 48.00 10.00 0.00 1243.00
1910 1.00 0.00 a 6.00 46.00 129.00 184.00 324.50 249.50 166.00 76.00 8.00 0.00 1190.00
1911 0.00 0.00 0.50 9.00 95.50 186.00 381.50 243.50 f 167.00 50.50 5.00 0.00 895.00
1912 0.50 0.00 0.00 2.00 155.00 248.50 345.50 318.00 203.50 24.00 1.00 0.00 a 1298.00
1913 0.00 2.00 0.00 25.00 94.00 253.50 343.50 392.50 198.00 25.50 1.03 a 0.00 1335.03
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 298.97 a 79.50 0.00 c 0.00 378.47
1916 0.00 4.00 11.50 24.50 87.00 244.50 339.00 431.00 284.50 47.53 a 0.00 a 0.00 f 1473.53
1917 0.00 0.00 0.00 15.00 99.20 a 223.50 404.55 a 502.50 296.40 e 133.00 53.50 28.50 1756.15
1918 8.78 a 0.50 i 13.50 m 41.00 87.50 324.00 383.50 382.50 375.50 99.00 0.50 3.00 1705.28
1919 0.00 0.00 11.00 20.50 102.30 a 195.00 a 363.22 a 360.50 271.50 34.74 b 18.60 e 0.50 f 1377.36
1920 26.50 0.00 1.50 14.50 57.00 239.00 428.00 429.00 227.50 48.00 16.00 0.53 b 1487.53
1921 0.00 6.00 2.00 35.00 160.88 b 281.50 332.50 388.00 181.00 90.23 c 15.00 1.55 a 1493.66
1922 0.00 0.00 0.00 24.11 b 112.78 b 259.14 a 426.50 400.50 307.50 100.50 0.00 1.07 b 1632.09
1923 2.14 b 0.00 14.97 b 58.50 145.50 312.00 443.00 468.50 312.50 158.00 7.50 0.00 1922.60
1924 3.50 1.50 0.00 34.00 183.00 267.93 a 384.50 311.00 257.00 61.00 2.00 f 7.00 1510.43
1925 0.50 2.59 a 0.52 a 44.50 197.00 l 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 w 0.00 z 48.11
1926 0.00 6.50 47.50 172.50 214.00 357.50 460.50 433.48 a 222.50 131.50 19.66 a 2.50 2068.14
1927 0.00 c 0.00 0.00 60.50 72.50 322.00 424.50 445.00 249.00 106.50 3.50 1.00 1684.50
1928 1.50 0.00 35.50 37.50 209.00 267.50 428.00 363.50 230.00 69.00 9.50 0.00 1651.00
1929 0.00 0.00 1.00 13.00 110.50 230.00 362.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 717.00
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 11.50 x 0.00 14.98 a 90.00 b 218.50 271.50 188.00 q 403.00 250.18 b 16.00 g 0.00 u 0.00 a 1248.16
1932 0.00 a 11.60 d 3.50 n 42.00 g 127.74 b 310.00 c 340.47 b 158.00 q 115.50 p 89.00 n 1.50 t 0.00 y 789.81
1933 0.00 f 0.00 e 0.60 e 23.50 g 9.00 t 49.50 x 211.50 j 451.10 b 46.50 u 59.50 p 6.50 q 0.00 z 451.70
1934 0.00 f 3.00 y 38.48 b 89.50 g 180.50 273.10 a 244.00 j 187.00 n 91.00 u 101.94 e 10.38 d 0.00 q 604.41
1935 19.67 e 0.56 c 0.00 d 39.11 b 124.55 c 197.00 h 380.55 b 305.00 180.50 k 29.93 b 0.00 j 0.00 c 899.38
1936 0.00 z 0.00 f 8.02 b 96.96 b 187.79 e 310.00 367.87 a 432.85 d 207.00 e 12.00 z 6.50 h 0.00 1610.49
1937 0.00 0.00 h 10.00 12.93 a 120.68 c 304.44 c 374.58 a 340.50 234.50 g 126.67 b 9.00 0.00 h 1298.81
1938 0.00 a 4.15 a 0.53 b 63.62 a 147.77 a 296.50 436.07 a 330.00 319.80 e 79.05 a 0.00 3.50 1680.99
1939 0.00 b 0.00 b 16.00 12.00 o 0.00 z 0.00 z 419.65 d 417.50 237.41 a 100.50 13.85 d 6.56 e 1211.47
1940 6.50 0.00 a 17.50 74.48 a 201.50 161.50 o 421.50 414.00 345.52 a 163.27 a 1.00 0.00 1645.27
1941 0.00 9.50 55.80 a 92.59 a 176.18 a 302.59 a 517.00 417.98 a 221.00 93.52 a 32.50 4.00 1922.66
1942 0.00 0.00 a 14.50 63.00 192.72 a 266.50 514.08 a 496.00 e 282.78 c 151.38 a 0.00 a 1.50 1982.46
1943 0.52 a 4.15 a 2.77 c 81.96 b 118.83 a 253.97 a 405.07 a 388.03 b 337.00 37.00 r 6.00 1.00 1599.30
1944 0.00 0.00 b 5.54 c 62.50 129.50 j 292.76 a 410.50 f 479.98 a 360.00 180.00 8.33 c 3.88 c 1392.99
1945 3.00 k 2.00 0.00 26.00 199.95 a 242.50 409.20 a 376.50 205.71 b 79.00 h 2.50 l 0.52 a 1462.38
1946 0.00 b 3.23 b 0.00 24.83 a 216.00 255.00 c 409.95 b 378.64 c 241.55 a 14.50 0.00 b 0.00 b 1543.70
1947 0.00 a 0.00 a 17.05 a 56.25 b 170.50 126.50 l 0.00 z 229.00 g 195.00 i 153.28 d 31.50 0.00 b 428.58
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 368.00 392.50 382.50 203.33 c 59.50 0.50 0.00 1406.33
1949 0.00 0.00 0.50 67.00 235.00 269.00 365.00 416.36 b 316.03 a 31.50 39.11 b 0.00 a 1739.50
1950 0.00 0.00 0.00 28.00 88.50 342.50 411.78 a 447.50 281.50 65.10 a 19.50 16.00 1700.38
1951 1.00 5.00 0.53 b 69.00 151.00 374.44 c 464.47 b 396.00 289.66 a 111.08 a 4.00 0.00 1866.18
1952 0.00 0.00 1.00 51.00 167.50 233.00 438.00 455.00 336.00 150.19 b 6.50 3.50 1841.69
1953 2.50 0.00 1.00 i 38.50 151.00 229.00 414.00 432.50 303.50 133.00 11.00 0.00 f 1715.00
1954 0.00 f 0.00 0.00 a 23.00 157.50 206.00 301.50 344.50 273.50 81.63 a 30.50 1.00 1419.13
1955 0.00 0.00 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 0.00
Period of Record Statistics
MEAN 1.81 1.81 9.28 43.88 143.12 267.80 400.10 395.65 256.00 84.89 11.90 2.24 1637.01
S.D. 5.00 3.18 14.15 32.04 46.16 48.14 50.06 60.20 56.34 42.45 12.65 4.97 226.94
SKEW 3.78 1.82 1.66 1.45 0.10 -0.13 0.34 0.03 0.17 0.34 1.35 3.82 -0.16
MAX 26.50 11.60 55.80 172.50 235.00 374.44 517.00 557.47 375.50 180.00 53.50 28.50 2068.14
MIN 0.00 0.00 0.00 2.00 57.00 132.69 301.50 249.50 150.00 14.50 0.00 0.00 1190.00
NO YRS 46 49 51 50 50 49 47 49 47 48 45 46 27