SEATTLE TCOMA WSCMO AP, WASHINGTON

Monthly Total Growing Degree Days

(457473)

Base Temperature = 40 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1931 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 25.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1932 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
1933 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
1934 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
1935 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
1936 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
1937 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
1938 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
1939 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
1940 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
1941 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
1942 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
1943 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
1944 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
1945 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
1946 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
1947 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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 522.00 f 693.00 656.50 513.50 323.00 76.50 5.00 2267.50
1949 3.00 63.00 173.00 302.50 536.00 571.50 700.00 734.50 622.50 266.50 282.00 49.50 4304.00
1950 8.00 75.50 80.50 190.50 360.50 604.00 732.50 736.50 534.00 284.00 139.50 160.50 3906.00
1951 26.00 55.00 67.50 286.00 439.50 633.00 755.00 670.00 571.00 334.50 150.00 18.50 4006.00
1952 37.50 66.00 85.00 253.50 434.00 494.50 725.50 713.00 575.50 442.00 109.00 72.50 4008.00
1953 144.50 38.50 106.00 206.00 390.50 464.00 677.00 704.50 589.50 408.00 200.00 86.00 4014.50
1954 25.50 79.50 57.00 167.00 430.00 488.50 622.50 638.00 560.50 327.50 280.50 73.50 3750.00
1955 31.00 28.00 54.00 136.50 330.50 538.50 621.50 648.50 509.50 321.00 104.00 44.50 3367.50
1956 54.00 8.50 79.50 288.00 520.50 506.50 762.50 710.50 537.00 293.50 111.50 90.00 3962.00
1957 6.00 52.50 138.00 303.50 555.50 610.00 675.00 670.00 681.00 331.50 113.50 120.50 4257.00
1958 121.00 210.50 128.50 275.50 633.00 717.50 892.50 822.50 593.50 430.00 146.00 159.50 5130.00
1959 98.00 64.00 133.00 287.00 417.00 586.50 807.50 690.50 522.50 371.50 141.50 64.50 4183.50
1960 62.00 75.50 142.00 277.00 393.00 585.00 828.50 687.50 540.00 392.50 153.50 49.00 4185.50
1961 147.50 127.00 174.50 211.00 427.50 703.00 838.00 879.00 561.00 336.00 104.00 55.00 4563.50
1962 66.00 143.50 130.00 298.00 329.00 595.50 729.00 682.50 588.00 389.00 202.00 115.00 4267.50
1963 22.00 232.00 117.00 248.50 549.00 595.50 693.00 761.00 705.50 448.00 152.00 72.00 4595.50
1964 37.50 58.50 130.50 204.50 409.50 537.50 728.50 700.00 554.50 418.00 95.50 40.50 3915.00
1965 56.00 92.00 218.50 283.50 367.50 623.50 860.00 797.50 549.50 508.50 282.50 88.00 4727.00
1966 85.50 117.00 171.00 298.50 448.50 560.50 685.50 758.50 643.50 353.50 162.50 131.50 4416.00
1967 96.00 83.00 78.00 195.50 478.00 680.50 819.50 963.50 770.00 457.50 223.50 110.00 4955.00
1968 102.00 245.50 266.00 258.50 535.00 620.50 837.00 733.00 572.00 354.00 205.00 50.00 4778.50
1969 17.50 79.50 213.50 266.00 559.00 727.50 764.50 744.00 628.00 385.50 206.50 161.50 4753.00
1970 77.00 198.50 186.00 182.00 454.50 679.50 772.00 759.00 558.50 333.00 228.50 37.50 4466.00
1971 89.00 95.00 67.50 267.50 449.00 476.00 791.00 859.00 527.00 345.50 172.50 20.50 4159.50
1972 49.00 87.50 214.00 210.50 568.50 601.00 805.50 827.50 459.50 312.00 202.50 101.50 4439.00
1973 72.50 122.00 129.50 258.00 510.50 578.50 765.50 668.50 655.00 378.00 119.50 143.50 4401.00
1974 87.50 97.50 206.50 309.50 460.50 678.50 743.00 762.00 730.50 387.50 155.50 116.00 4734.50
1975 43.50 55.00 95.50 176.00 451.50 619.50 852.50 719.50 688.50 354.00 171.00 101.50 4328.00
1976 84.50 54.50 70.00 286.50 507.00 599.50 802.00 746.50 676.00 460.50 245.00 163.00 4695.00
1977 72.00 242.50 176.50 406.50 448.00 690.00 779.00 882.00 567.00 377.50 163.00 91.00 4895.00
1978 141.00 170.50 267.50 297.00 448.50 729.00 800.00 788.00 564.00 443.00 94.00 42.00 4784.50
1979 20.00 88.50 289.00 324.00 532.50 674.50 849.00 742.00 678.00 439.50 129.00 139.50 4905.50
1980 16.00 139.00 135.00 347.50 440.50 523.50 736.50 679.50 588.00 428.50 205.50 169.50 4409.00
1981 141.00 141.50 272.50 287.00 455.50 525.00 721.50 870.00 630.50 338.00 222.00 89.50 4694.00
1982 62.00 95.50 126.00 221.50 454.00 693.50 705.50 777.00 616.50 394.00 111.50 78.00 4335.00
1983 167.00 193.50 289.00 320.50 547.50 596.50 720.50 794.00 547.50 360.50 232.00 41.50 4810.00
1984 149.50 140.00 263.00 261.00 399.00 563.50 774.50 772.50 595.50 303.50 143.00 16.00 4381.00
1985 15.00 41.00 103.50 274.00 460.00 601.00 886.00 779.00 543.00 352.00 73.00 25.50 4153.00
1986 152.50 122.00 286.00 242.50 487.00 679.00 673.50 880.50 573.00 444.00 166.50 78.50 4785.00
1987 81.50 175.00 277.00 358.50 524.50 676.50 749.50 810.00 675.50 488.00 258.50 61.50 5136.00
1988 43.50 146.00 174.00 308.50 460.00 587.50 784.00 786.00 615.50 477.50 164.50 94.50 4641.50
1989 61.50 33.50 149.50 402.50 495.00 695.50 758.50 782.50 721.00 405.00 208.00 120.00 4832.50
1990 95.00 79.00 223.00 362.50 454.00 595.00 867.50 844.50 701.00 346.00 202.00 46.50 4816.00
1991 69.50 215.50 135.00 271.50 443.50 565.00 829.50 823.50 685.00 400.00 222.50 134.00 4794.50
1992 143.50 211.00 319.50 393.00 614.00 748.00 826.50 830.00 599.00 445.00 170.50 29.50 5329.50
1993 59.00 111.50 251.50 315.50 608.00 615.50 655.00 789.50 655.00 476.50 105.50 100.50 4743.00
1994 159.00 58.00 267.00 369.00 562.50 616.50 864.50 847.00 730.00 396.50 85.00 109.50 5064.50
1995 204.00 190.00 243.50 352.50 623.00 680.50 837.00 710.50 719.50 386.00 272.50 115.50 5334.50
1996 89.50 135.00 225.00 345.00 405.00 612.50 863.00 819.00 576.00 345.00 139.50 38.00 4592.50
1997 100.00 74.50 150.00 274.50 563.00 582.50 757.50 859.50 664.50 350.00 252.50 74.50 4703.00
1998 128.50 160.00 207.00 311.00 459.50 596.00 855.00 829.50 694.00 391.00 200.00 91.50 4923.00
1999 81.00 81.50 133.00 255.00 366.50 544.00 695.00 767.50 623.50 376.00 237.00 89.00 4249.00
2000 40.00 109.50 138.50 326.50 428.50 617.00 752.50 727.00 605.00 396.50 95.00 68.00 4304.00
2001 89.00 50.50 168.00 238.50 476.00 527.00 695.00 768.00 592.50 337.50 201.00 59.00 4202.00
2002 84.50 67.00 97.50 262.50 403.50 632.50 773.50 781.00 617.50 353.00 214.00 103.00 4389.50
2003 179.50 68.00 212.00 266.50 458.00 684.00 862.50 818.00 677.50 443.00 112.00 90.50 4871.50
2004 89.00 134.50 235.50 398.50 525.50 700.00 872.00 839.50 565.00 412.00 158.50 92.50 5022.50
2005 144.00 83.50 280.50 322.50 564.50 597.50 792.00 829.00 585.00 433.50 97.50 139.50 4869.00
2006 203.50 109.50 175.50 309.00 524.50 695.00 545.50 j 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2017.00
Period of Record Statistics
MEAN 83.28 109.85 172.11 281.92 475.45 612.41 770.96 770.16 610.72 384.22 170.19 84.97 4530.49
S.D. 51.35 58.55 72.13 60.40 72.19 68.84 69.20 70.00 67.29 54.63 57.52 41.71 404.62
SKEW 0.48 0.69 0.21 -0.06 0.20 -0.08 -0.15 0.18 0.30 0.14 0.21 0.19 -0.33
MAX 204.00 245.50 319.50 406.50 633.00 748.00 892.50 963.50 770.00 508.50 282.50 169.50 5334.50
MIN 3.00 8.50 54.00 136.50 329.00 464.00 621.50 638.00 459.50 266.50 73.00 5.00 3367.50
NO YRS 58 58 58 58 58 58 58 58 58 58 58 58 57