WINTHROP 1 WSW, WASHINGTON

Monthly Total Growing Degree Days

(459376)

Base Temperature = 40 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1906 0.00 z 0.00 z 28.00 0.00 z 478.50 152.00 v 1135.00 890.00 605.50 0.00 z 9.00 0.00 z 3146.00
1907 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 593.65 d 0.00 z 0.00 z 0.00 z 593.65
1908 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
1909 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 19.00 v 0.00 j 0.00
1910 0.00 a 0.00 51.50 26.50 x 0.00 z 67.50 z 107.50 z 160.50 w 0.00 z 62.00 y 0.00 p 0.00 51.50
1911 0.00 c 0.00 a 66.00 244.00 452.00 56.00 z 0.00 z 0.00 z 277.00 h 205.93 c 10.34 a 0.00 978.27
1912 0.00 5.00 43.00 228.50 507.88 a 759.50 874.89 d 713.53 b 465.50 153.50 4.50 0.00 3755.81
1913 0.00 a 0.00 1.50 259.29 b 440.00 659.48 a 827.18 a 857.50 518.50 148.50 20.50 0.00 3732.45
1914 2.00 0.00 10.00 320.00 511.00 620.00 919.00 906.50 470.00 302.50 35.00 0.00 4096.00
1915 0.00 1.50 90.50 357.00 434.00 639.50 834.00 1008.00 545.50 268.00 12.00 0.00 4190.00
1916 0.00 0.00 2.00 217.00 364.52 b 626.50 730.50 862.50 554.00 239.00 15.00 0.00 3611.02
1917 0.00 0.00 2.00 126.00 466.50 534.00 942.92 a 1098.50 585.50 382.50 41.90 a 0.00 a 4179.81
1918 5.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 767.50 422.00 19.50 0.00 1214.00
1919 0.00 0.00 5.00 262.50 413.50 602.50 259.00 v 972.00 602.50 5.00 w 10.50 0.00 d 2868.50
1920 0.00 r 0.00 f 67.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 48.00 r 15.50 d 83.00
1921 0.00 z 0.00 z 0.00 z 0.00 z 492.00 654.50 846.50 870.50 400.00 297.00 52.00 0.00 3612.50
1922 0.00 0.00 0.50 154.50 403.00 801.00 970.00 876.00 619.00 329.50 5.00 0.00 4158.50
1923 0.00 0.00 26.00 247.50 437.50 632.00 930.00 892.50 648.00 293.50 10.00 0.00 4117.00
1924 0.00 1.50 25.00 166.50 613.00 692.00 951.00 865.00 579.00 192.00 5.50 0.00 a 4090.50
1925 0.00 0.00 50.50 276.50 544.00 694.00 1003.00 830.00 567.00 204.50 7.50 0.00 4177.00
1926 0.00 0.00 161.00 369.00 442.50 785.50 1015.50 866.00 392.50 254.00 34.50 0.00 4320.50
1927 0.00 0.00 13.00 186.00 376.50 680.50 913.00 882.00 459.00 175.50 6.00 0.00 3691.50
1928 0.00 0.50 50.00 146.00 557.00 665.50 953.00 848.00 539.00 157.00 2.50 0.00 3918.50
1929 0.00 0.00 50.00 151.00 450.50 630.50 843.00 864.50 462.50 231.98 a 9.50 0.00 3693.48
1930 0.00 0.00 91.00 309.00 404.50 556.50 1005.50 847.50 545.50 167.50 4.00 0.00 a 3931.00
1931 0.00 0.00 31.50 230.50 531.00 675.50 940.00 883.00 525.50 229.00 6.50 0.00 4052.50
1932 0.00 3.50 35.50 281.00 462.50 767.00 791.00 859.50 561.00 236.00 3.00 1.50 4001.50
1933 0.00 0.00 15.00 229.50 335.00 605.50 877.50 871.50 423.00 230.50 20.00 0.00 3607.50
1934 0.00 0.00 65.00 416.38 a 521.50 709.50 865.50 892.50 479.00 247.00 24.50 0.00 4220.88
1935 0.00 0.00 1.50 173.00 440.50 646.00 844.50 776.00 602.00 228.00 0.00 0.00 3711.50
1936 0.00 a 0.00 1.00 327.41 a 592.00 655.50 887.00 887.00 492.50 295.50 0.00 0.00 a 4137.91
1937 0.00 a 0.00 b 10.50 103.00 413.50 642.00 947.00 734.50 604.00 284.00 32.50 0.00 a 3771.00
1938 0.00 z 0.00 q 0.00 z 0.00 z 455.00 737.00 975.50 778.00 703.00 265.00 14.00 0.00 a 3927.50
1939 0.00 0.00 a 23.85 e 294.64 b 491.50 597.00 908.00 896.50 589.50 253.00 5.00 0.00 a 4058.99
1940 0.00 a 0.00 94.50 293.00 522.50 748.50 903.00 855.00 685.50 316.50 7.50 0.00 a 4426.00
1941 0.00 0.00 127.50 355.50 446.00 657.50 952.50 797.50 421.00 218.00 21.00 0.50 3997.00
1942 0.00 a 0.00 25.00 285.00 397.00 565.00 869.50 903.00 628.00 282.50 2.50 0.00 a 3957.50
1943 0.00 0.00 5.50 283.50 351.91 d 551.00 868.50 585.00 h 625.00 277.50 3.00 1.50 2967.41
1944 0.00 b 0.00 36.00 246.00 459.50 669.50 875.00 784.50 617.00 374.50 34.50 0.00 4096.50
1945 0.00 d 0.00 31.00 91.00 i 470.17 a 605.50 901.07 a 870.00 507.50 317.75 a 10.00 0.00 a 3712.98
1946 0.00 0.00 17.50 f 233.50 534.50 535.00 817.00 820.00 509.00 153.50 0.00 a 0.00 3602.50
1947 0.00 2.00 75.50 284.46 b 580.00 621.50 835.40 b 0.00 z 545.50 253.50 17.00 0.00 3214.86
1948 0.00 0.00 13.50 129.00 391.63 a 748.45 a 761.57 a 712.48 a 516.60 e 162.48 b 0.00 0.00 3435.71
1949 0.00 0.00 7.23 a 268.50 575.00 623.50 849.92 a 808.50 586.00 130.00 45.00 a 0.00 3893.65
1950 0.00 0.00 3.00 115.50 413.50 645.52 a 872.13 a 863.35 a 602.68 b 159.00 0.00 0.00 a 3674.68
1951 0.00 a 0.00 2.50 215.50 473.50 642.50 894.35 a 838.00 587.00 230.43 a 0.00 0.50 3884.28
1952 0.00 0.00 30.00 286.00 483.50 620.50 871.00 851.50 649.50 366.00 7.00 0.00 4165.00
1953 0.50 0.00 a 45.50 196.50 421.50 519.50 825.00 807.50 573.00 280.00 30.00 0.00 3699.00
1954 0.00 1.04 a 2.87 d 103.50 454.67 a 482.59 a 756.50 722.00 492.00 136.40 a 52.00 0.00 3203.56
1955 0.00 0.00 0.00 75.50 335.00 644.00 788.36 b 794.50 551.50 164.00 4.66 a 0.00 a 3357.52
1956 0.00 0.00 1.03 a 223.50 535.00 551.00 908.00 843.00 523.97 a 185.50 1.50 0.00 3772.50
1957 0.00 0.00 11.00 l 248.00 622.00 674.00 795.50 684.50 648.50 190.00 8.50 0.00 3871.00
1958 0.00 3.00 41.00 187.50 642.50 790.50 980.00 962.50 504.50 233.00 7.00 0.00 4351.50
1959 0.00 0.00 3.50 205.00 407.50 615.50 865.00 702.31 b 459.50 193.00 11.50 0.00 3462.81
1960 0.00 0.00 36.50 187.00 368.00 615.50 971.00 762.50 516.00 250.00 2.50 0.00 3709.00
1961 0.00 0.00 39.50 201.00 454.50 751.50 938.00 953.50 464.50 141.00 0.00 0.00 3943.50
1962 0.00 a 0.00 11.50 272.50 378.00 594.00 808.00 746.50 563.00 207.00 17.50 0.00 3598.00
1963 0.00 2.00 46.00 163.39 b 441.00 662.00 782.50 851.00 677.50 289.00 7.00 0.00 3921.39
1964 0.00 0.00 a 13.50 168.50 406.00 606.00 0.00 z 232.50 t 470.00 212.50 6.50 0.00 1883.00
1965 0.00 0.00 6.00 227.00 362.00 652.50 850.50 817.00 395.50 235.00 31.00 0.00 3576.50
1966 0.00 0.00 15.00 162.50 481.50 536.50 486.50 i 576.50 h 664.00 161.00 1.50 0.00 2022.00
1967 0.00 1.00 9.50 78.00 409.50 688.00 832.00 905.00 687.00 189.00 13.00 0.50 3812.50
1968 0.00 1.81 e 0.00 z 116.50 384.29 b 567.86 b 868.50 681.00 515.50 112.50 0.00 0.00 b 3247.96
1969 0.00 a 0.00 6.09 c 160.00 525.00 788.50 772.93 a 730.50 519.81 d 135.22 b 9.64 b 0.00 a 3647.70
1970 0.00 0.00 0.00 z 100.00 449.00 775.50 934.65 a 834.50 429.50 167.00 10.50 0.00 c 3700.65
1971 1.00 0.00 0.00 a 149.50 535.00 0.00 z 878.52 c 930.52 a 369.81 d 204.82 c 0.00 a 0.00 c 3069.16
1972 0.00 0.00 f 17.00 87.50 500.50 0.00 z 735.39 d 827.38 b 360.00 a 193.15 e 3.62 a 0.00 z 2724.54
1973 0.00 b 0.00 31.00 0.00 z 0.00 z 0.00 z 896.50 853.00 585.00 168.43 a 0.00 0.00 2533.93
1974 0.00 a 0.00 24.59 b 0.00 z 337.00 705.00 773.00 845.50 594.00 236.00 0.00 z 0.00 3515.09
1975 0.00 0.00 0.50 144.50 432.00 601.50 959.50 742.00 573.50 194.50 19.00 0.00 3667.00
1976 0.00 a 0.00 13.50 188.00 449.00 533.50 825.50 748.50 621.50 227.50 15.00 0.00 c 3622.00
1977 0.00 b 5.50 28.00 289.00 382.50 772.00 849.00 974.00 479.00 175.00 2.68 b 0.00 a 3956.68
1978 0.00 0.00 74.00 209.00 411.50 707.50 906.50 788.50 473.00 215.00 3.62 a 0.00 3788.62
1979 0.00 0.00 31.00 b 155.50 480.50 690.00 918.00 678.00 g 586.00 295.57 b 5.17 a 0.00 d 3161.74
1980 0.00 0.00 14.50 265.50 476.22 b 547.50 810.00 745.50 527.50 233.00 33.50 0.00 3653.22
1981 0.00 0.50 86.50 185.00 412.50 500.50 776.50 908.00 545.00 156.50 21.00 0.00 3592.00
1982 0.00 0.00 6.50 101.50 392.00 0.00 z 772.50 780.50 518.00 184.50 0.50 0.00 2756.00
1983 0.00 0.00 32.00 194.00 487.00 612.50 697.50 842.50 424.00 178.50 22.50 0.00 3490.50
1984 0.00 0.00 45.00 114.50 322.00 577.00 854.00 841.50 392.50 165.00 0.00 0.00 3311.50
1985 0.00 0.00 7.00 201.00 497.00 641.50 979.00 779.00 413.50 168.50 4.50 0.00 3691.00
1986 0.00 2.50 63.50 178.00 494.50 790.50 776.50 990.00 481.50 292.00 14.50 0.00 4083.50
1987 0.00 a 0.00 53.22 a 345.00 535.00 756.50 851.50 834.50 683.00 313.50 60.50 0.00 4432.72
1988 0.00 0.00 37.00 298.00 470.00 643.50 865.50 843.50 583.50 362.50 22.00 0.00 4125.50
1989 3.50 0.00 16.00 294.00 441.50 747.50 847.50 768.50 593.00 235.00 43.00 0.00 3989.50
1990 0.00 0.00 84.50 335.00 428.00 617.50 0.00 z 884.00 690.00 134.00 41.00 0.00 3214.00
1991 0.00 10.00 39.00 216.50 451.50 560.00 860.50 908.50 666.00 263.00 2.00 0.00 3977.00
1992 0.00 1.00 165.50 263.50 568.00 838.50 845.50 858.50 488.50 262.50 21.50 0.00 4313.00
1993 0.00 0.50 17.00 173.50 634.50 609.50 696.00 766.50 593.00 317.50 3.50 0.00 3811.50
1994 0.00 0.00 88.50 344.50 520.50 612.00 957.00 0.00 z 676.50 234.00 0.00 0.00 3433.00
1995 0.00 0.50 22.00 191.50 556.50 645.00 881.50 683.50 660.50 189.50 3.00 0.00 3833.50
1996 0.00 0.00 27.00 224.00 353.00 608.50 886.50 842.50 515.00 195.50 17.50 0.00 3669.50
1997 0.00 0.00 10.50 155.50 516.50 586.00 782.00 865.50 614.50 172.50 40.00 0.00 3743.00
1998 0.00 1.00 93.50 240.00 568.00 673.50 989.00 939.00 713.50 233.00 32.00 0.00 4482.50
1999 0.00 0.00 23.50 195.50 367.00 592.50 797.00 905.00 524.00 183.50 67.50 2.00 3657.50
2000 0.00 0.00 36.00 289.50 439.50 657.50 808.00 831.00 541.50 213.00 6.50 0.00 3822.50
2001 0.00 0.00 71.00 183.00 502.00 588.50 889.50 906.00 639.00 169.50 32.00 0.00 3980.50
2002 0.00 5.00 21.50 225.50 397.50 705.50 910.50 834.00 573.50 230.50 29.00 0.00 3932.50
2003 0.00 0.00 72.50 221.00 434.50 731.50 957.00 908.50 636.50 370.50 2.50 0.00 4334.50
2004 0.00 0.50 105.00 313.00 461.00 718.00 952.00 0.00 z 523.00 267.50 5.00 0.00 3345.00
2005 0.00 0.50 83.00 261.50 539.50 636.50 868.00 890.50 530.00 282.50 0.00 z 0.00 4092.00
2006 0.00 0.50 33.50 250.50 477.00 700.00 985.50 830.00 607.50 286.00 9.50 0.00 4180.00
2007 0.00 0.00 62.50 211.50 502.00 646.00 1010.00 814.50 575.50 176.00 23.50 0.00 4021.50
2008 0.00 3.50 5.50 135.50 571.00 636.50 889.00 832.50 543.50 218.50 38.50 0.00 3874.00
2009 0.00 0.00 7.50 209.00 471.50 709.00 943.00 915.00 670.50 190.50 2.00 0.00 4118.00
2010 0.00 1.50 60.00 224.00 352.50 605.50 865.00 818.50 545.50 312.50 46.00 0.00 3831.00
2011 0.00 0.00 25.50 88.50 376.50 591.00 769.00 890.00 647.00 213.90 a 0.00 0.00 a 3601.40
2012 0.00 0.00 11.00 229.50 423.00 542.50 903.50 883.50 613.50 225.00 35.17 a 0.00 3866.67
2013 0.00 0.00 54.00 12.50 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 54.00
Period of Record Statistics
MEAN 0.12 0.56 36.19 218.19 461.73 649.00 875.99 843.88 555.16 229.55 15.11 0.22 3886.55
S.D. 0.64 1.47 34.42 73.62 71.85 75.57 77.82 75.01 84.83 64.03 15.58 1.56 274.07
SKEW 6.19 3.90 1.45 0.16 0.33 0.28 0.16 0.12 -0.14 0.64 1.21 9.44 0.00
MAX 5.00 10.00 165.50 416.38 642.50 838.50 1135.00 1098.50 767.50 422.00 67.50 15.50 4482.50
MIN 0.00 0.00 0.00 75.50 322.00 482.59 696.00 681.00 360.00 112.50 0.00 0.00 3203.56
NO YRS 101 100 98 95 100 95 96 93 102 100 100 102 77