SEATTLE UNIV OF WASH, WASHINGTON

Monthly Total Growing Degree Days

(457478)

Base Temperature = 50 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 198307
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
1909 0.00 c 0.00 0.00 12.41 a 94.66 c 285.00 332.00 360.12 a 311.00 98.00 8.50 0.00 1501.69
1910 0.00 0.00 a 20.00 57.32 b 201.50 217.50 372.00 281.00 151.50 g 49.00 2.00 0.00 1200.32
1911 0.00 0.00 c 2.50 20.00 87.50 202.00 438.00 309.00 196.00 29.50 o 3.00 0.00 1258.00
1912 1.50 0.00 3.50 22.00 225.00 292.00 442.50 330.50 274.50 56.00 4.50 0.00 1652.00
1913 0.00 0.00 0.00 38.00 114.00 294.50 404.00 452.00 288.50 44.00 2.00 0.00 f 1637.00
1914 11.00 0.00 0.00 d 49.14 a 227.16 b 249.23 d 0.00 z 378.72 a 177.50 139.50 40.86 a 0.00 z 1273.10
1915 0.00 h 4.50 47.50 112.50 193.75 e 317.00 430.50 492.50 239.50 103.00 0.00 10.00 1950.75
1916 0.00 2.00 11.50 22.00 90.50 270.50 346.50 419.00 242.00 42.50 2.00 0.00 1448.50
1917 0.00 0.50 0.00 7.50 96.50 228.00 420.00 441.00 260.00 115.50 41.00 12.00 1622.00
1918 5.00 0.00 9.50 61.00 0.00 z 338.50 411.50 423.50 350.00 120.50 1.00 2.00 1722.50
1919 1.50 0.00 23.50 84.00 175.50 0.00 z 0.00 z 0.00 z 306.72 a 55.11 d 13.50 1.00 660.84
1920 0.00 a 0.00 0.00 0.00 12.00 80.00 h 326.00 301.50 118.50 0.00 z 6.50 1.00 765.50
1921 0.50 g 16.50 1.00 36.00 146.00 338.00 355.50 407.00 238.00 118.50 30.50 4.00 1691.00
1922 0.00 0.00 0.00 20.00 196.50 380.00 428.50 415.00 334.50 156.00 1.00 4.50 1936.00
1923 1.15 d 0.00 16.00 73.50 158.00 336.00 468.50 477.40 a 338.04 b 160.68 a 24.50 0.00 2053.77
1924 4.65 a 5.50 0.00 49.50 230.90 b 332.50 412.82 a 409.50 317.00 117.50 2.50 12.50 1894.86
1925 0.00 0.00 1.50 73.00 264.00 330.50 467.50 399.50 304.00 69.00 8.50 14.50 1932.00
1926 0.00 4.00 44.00 182.00 207.50 383.00 496.50 434.00 245.50 146.00 27.50 3.00 2173.00
1927 0.00 0.00 0.00 62.00 85.50 337.00 449.50 480.50 257.50 118.00 12.50 3.50 1806.00
1928 2.50 0.50 31.50 41.50 251.50 294.00 471.00 390.00 268.00 81.00 12.50 0.00 1844.00
1929 0.00 0.00 0.00 25.71 b 141.00 265.00 340.00 f 451.50 326.00 165.00 f 0.50 1.55 a 1211.26
1930 0.00 13.50 17.00 110.50 118.00 258.00 392.00 471.50 277.00 70.50 24.64 b 0.00 1752.64
1931 13.50 0.50 22.50 0.00 z 0.00 z 335.00 490.00 471.50 303.50 118.00 20.00 0.00 a 1774.50
1932 0.00 a 17.50 11.50 90.50 179.00 389.50 378.00 467.50 335.50 179.50 35.50 1.00 2085.00
1933 0.50 0.00 6.00 62.00 111.50 294.00 417.00 509.50 228.10 a 131.50 19.00 2.00 1781.10
1934 1.00 10.50 78.00 225.50 281.50 374.00 422.50 502.50 281.00 164.50 27.50 1.00 2369.50
1935 24.00 10.50 5.00 55.00 190.50 348.50 450.00 439.00 374.00 119.00 0.50 2.50 2018.50
1936 0.00 0.00 9.00 153.50 292.50 401.50 479.00 521.50 303.50 206.00 20.00 2.00 2388.50
1937 0.00 1.00 32.00 22.50 211.50 404.50 474.00 454.00 351.00 201.50 30.00 4.50 2186.50
1938 0.00 8.00 9.50 103.50 224.50 377.00 525.00 419.00 405.50 149.50 0.50 6.50 2228.50
1939 0.00 0.00 20.50 124.50 216.00 265.56 c 483.50 504.00 301.50 126.00 29.50 15.50 2086.56
1940 11.37 a 0.00 24.50 109.50 262.00 398.00 465.50 457.77 a 408.50 202.00 5.50 3.62 a 2348.25
1941 1.03 a 10.00 68.00 131.50 205.00 364.50 592.50 472.50 265.50 102.50 39.00 5.50 2257.53
1942 1.50 0.00 31.00 b 69.00 207.00 279.00 578.50 541.50 382.00 222.68 a 4.00 6.20 a 2322.38
1943 0.00 6.50 3.50 99.83 a 137.50 291.00 431.23 c 457.80 c 402.00 169.50 12.00 3.10 a 2013.96
1944 1.00 2.00 10.50 69.00 195.00 325.86 a 509.20 d 447.95 a 406.50 228.50 17.00 1.00 2213.52
1945 9.00 2.00 0.00 a 26.00 259.00 296.50 521.00 459.50 257.00 160.68 a 5.00 0.52 a 1996.20
1946 1.00 1.00 3.62 a 41.50 261.95 a 297.93 a 490.66 b 0.00 z 202.50 j 52.04 c 0.00 g 5.00 h 1149.69
1947 0.00 a 0.00 z 38.50 126.11 c 286.00 351.72 a 474.50 329.50 h 0.00 z 0.00 z 6.50 2.50 1285.84
1948 0.00 0.00 8.00 26.50 177.00 428.00 455.50 426.50 303.00 93.50 1.50 0.00 1919.50
1949 0.00 0.00 6.50 86.50 286.00 338.00 440.20 a 453.50 353.50 49.00 41.00 2.50 2056.70
1950 0.00 1.00 1.00 19.00 108.50 361.50 475.00 505.00 331.50 89.50 28.00 13.43 a 1933.43
1951 2.00 6.00 4.00 92.07 a 216.00 420.00 540.50 480.50 367.00 135.00 5.00 0.00 2268.07
1952 2.00 2.50 1.50 66.50 219.00 188.50 g 476.88 a 497.50 388.00 204.50 11.50 3.62 a 1873.50
1953 5.50 0.00 18.60 a 57.50 224.00 272.00 537.00 497.00 338.00 155.00 16.00 0.00 2120.60
1954 0.00 0.00 5.17 a 26.50 182.42 e 271.50 372.00 397.50 315.00 130.00 79.00 0.50 1779.59
1955 0.00 a 0.00 a 7.00 24.50 107.00 293.50 401.50 434.50 318.50 132.30 c 9.83 a 0.00 a 1728.63
1956 0.00 a 0.00 4.50 82.50 308.50 274.50 557.50 532.00 363.00 140.07 d 18.00 0.50 2281.07
1957 0.00 0.00 7.00 84.00 346.00 332.50 f 0.00 z 0.00 z 340.50 i 123.50 g 13.00 4.13 a 454.13
1958 0.00 z 34.50 5.68 a 67.00 372.00 a 465.00 c 649.40 b 556.34 c 268.00 g 157.98 e 15.50 h 0.00 z 2307.90
1959 0.00 a 1.75 d 6.72 a 77.50 181.00 326.00 449.50 f 443.82 a 256.55 a 97.00 9.00 0.00 1399.34
1960 5.50 1.00 18.50 78.50 134.50 335.00 562.50 430.38 a 268.50 140.69 e 8.79 a 0.00 r 1983.87
1961 1.00 f 0.50 2.87 d 0.00 z 96.50 s 270.50 i 271.50 q 361.50 k 189.00 k 66.77 e 1.80 e 0.00 q 71.94
1962 0.00 d 8.00 10.50 k 91.07 b 114.50 190.00 j 333.00 f 297.00 k 217.50 k 145.38 b 31.15 d 5.17 a 395.27
1963 0.00 36.00 11.07 c 67.76 a 265.00 291.11 c 369.23 c 431.42 a 392.31 d 123.50 f 8.00 0.00 c 1871.90
1964 0.00 z 0.00 z 19.12 a 23.50 148.00 290.69 a 0.00 z 0.00 z 261.50 124.00 0.00 i 3.50 870.31
1965 0.00 1.00 20.50 80.50 143.50 345.00 553.00 508.00 268.50 199.00 57.00 4.50 2180.50
1966 0.50 3.00 14.47 a 67.00 199.50 329.00 440.50 504.50 397.00 130.00 10.50 6.00 2101.97
1967 1.00 2.50 0.00 12.00 205.00 440.50 536.00 648.50 482.50 159.00 19.50 0.50 2507.00
1968 6.50 18.00 37.50 52.00 228.00 332.00 553.00 466.00 317.00 89.00 10.50 0.00 2109.50
1969 0.00 0.00 22.50 48.00 287.00 480.50 463.00 423.00 329.00 97.00 22.00 0.00 2172.00
1970 0.00 6.00 7.00 16.00 172.00 429.00 486.00 464.00 248.04 b 89.00 47.00 0.00 1964.04
1971 4.50 1.50 0.50 50.00 197.50 241.50 517.50 608.00 295.00 120.00 2.00 0.00 2038.00
1972 0.00 2.50 31.50 33.00 269.50 316.00 529.00 576.00 280.50 110.00 14.00 6.00 2168.00
1973 5.00 5.50 5.50 66.50 248.50 304.00 496.50 398.50 363.00 110.00 9.50 1.50 2014.00
1974 6.00 0.00 5.50 30.00 a 129.00 342.50 455.00 526.00 471.50 154.00 8.00 1.50 2129.00
1975 1.00 0.00 1.00 10.50 206.50 303.50 511.00 403.50 386.00 127.00 28.50 11.00 1989.50
1976 5.50 0.00 1.50 83.50 212.50 270.00 480.50 404.50 377.50 142.50 40.00 6.00 2024.00
1977 3.50 16.00 2.50 138.50 149.00 385.50 454.50 636.50 295.00 106.00 5.50 10.50 2203.00
1978 0.50 15.00 29.50 74.50 212.00 405.00 f 549.73 a 506.50 301.50 193.00 0.00 0.00 a 1882.23
1979 0.00 j 0.00 j 68.50 61.15 d 309.50 436.00 0.00 z 305.50 m 477.93 a 211.50 15.00 4.00 1583.58
1980 0.00 a 14.00 9.00 161.50 252.13 a 306.67 c 532.50 470.00 384.50 222.00 56.50 26.00 2434.80
1981 13.90 b 3.50 d 60.50 97.50 b 225.50 323.00 489.69 d 667.50 406.50 78.50 31.50 0.00 2397.58
1982 0.00 4.50 7.00 60.50 237.00 501.50 476.50 530.00 400.50 158.00 12.00 0.00 2387.50
1983 1.50 17.50 19.50 124.00 363.50 367.50 500.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1394.00
Period of Record Statistics
MEAN 2.25 4.42 14.51 67.21 201.03 331.81 468.31 461.78 319.59 128.67 17.06 3.50 2056.41
S.D. 4.26 7.40 17.54 43.71 70.51 62.56 65.28 73.82 69.43 47.56 16.09 4.85 240.67
SKEW 2.84 2.43 1.81 1.04 0.02 0.51 0.03 0.33 0.01 0.17 1.38 2.21 -0.45
MAX 24.00 36.00 78.00 225.50 372.00 501.50 649.40 667.50 482.50 228.50 79.00 26.00 2507.00
MIN 0.00 0.00 0.00 0.00 12.00 202.00 326.00 281.00 118.50 42.50 0.00 0.00 1448.50
NO YRS 69 72 74 73 72 68 66 66 67 68 71 68 50