SEATTLE WB AIRPORT, WASHINGTON

Monthly Total Growing Degree Days

(457483)

Base Temperature = 40 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 196509
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 716.50 753.50 0.00 z 551.00 352.50 121.50 18.00 2513.00
1949 5.00 67.50 217.50 359.00 586.00 613.97 a 734.50 765.50 639.50 290.00 307.50 74.00 4659.97
1950 11.00 120.00 132.50 269.50 433.50 676.00 797.00 813.00 600.50 349.50 181.50 224.50 4608.50
1951 49.50 90.74 a 114.50 351.00 509.50 708.00 827.50 744.50 628.00 387.50 183.50 32.00 4626.24
1952 52.50 96.50 140.50 322.00 496.00 563.50 800.00 787.50 653.50 494.50 144.00 105.50 4656.00
1953 211.00 93.00 187.00 298.50 501.50 571.50 784.50 794.50 636.00 455.50 252.00 134.50 4919.50
1954 51.00 128.00 112.50 248.00 507.00 542.50 686.50 695.50 613.50 384.50 311.00 106.50 4386.50
1955 59.00 51.00 75.50 202.50 399.00 590.00 688.50 706.00 570.00 384.00 140.00 69.50 3935.00
1956 71.00 22.50 111.00 337.50 587.00 576.50 830.00 764.50 574.00 354.50 135.50 122.50 4486.50
1957 15.50 75.50 186.50 362.00 633.50 678.00 736.00 746.50 733.50 379.50 151.00 148.00 4845.50
1958 148.50 252.50 191.00 351.00 683.50 787.50 971.50 881.00 632.50 453.00 177.00 189.50 5718.50
1959 120.00 87.50 184.50 336.50 484.50 664.50 850.00 744.00 556.00 404.50 166.00 82.00 4680.00
1960 69.00 116.50 184.50 339.00 495.00 671.50 895.00 759.50 603.00 454.50 184.50 66.00 4838.00
1961 169.50 182.50 243.00 303.00 521.00 757.00 895.50 914.00 588.00 368.50 124.50 90.50 5157.00
1962 98.00 169.50 147.50 380.00 431.00 632.00 788.50 765.50 665.00 460.50 256.50 175.00 4969.00
1963 39.00 248.00 178.50 292.50 572.50 624.50 749.00 819.50 758.00 506.00 227.00 135.50 5150.00
1964 114.00 104.50 184.50 267.00 473.00 618.50 801.00 759.00 595.00 461.00 143.00 58.00 4578.50
1965 72.50 116.50 214.00 363.00 468.50 696.50 892.50 861.50 585.50 0.00 z 0.00 z 0.00 z 4270.50
Period of Record Statistics
MEAN 79.76 118.96 165.00 316.59 516.59 649.36 804.50 783.62 621.25 408.24 188.59 107.74 4763.42
S.D. 57.23 62.65 44.99 48.26 74.59 68.55 76.22 58.79 55.80 59.33 60.85 55.76 392.15
SKEW 0.78 0.89 -0.28 -0.82 0.63 0.29 0.38 0.73 1.09 -0.05 0.88 0.40 0.39
MAX 211.00 252.50 243.00 380.00 683.50 787.50 971.50 914.00 758.00 506.00 311.00 224.50 5718.50
MIN 5.00 22.50 75.50 202.50 399.00 542.50 686.50 695.50 551.00 290.00 121.50 18.00 3935.00
NO YRS 17 17 17 17 17 18 18 17 18 17 17 17 16