SEATTLE UNIV OF WASH, WASHINGTON

Monthly Total Growing Degree Days

(457478)

Base Temperature = 40 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 19.93 c 60.50 95.50 220.86 a 376.43 c 585.00 642.00 670.12 a 611.00 378.00 167.00 19.50 3845.84
1910 33.50 16.07 a 222.50 257.68 b 508.00 517.50 682.00 591.00 381.50 g 323.50 93.50 69.50 3314.75
1911 26.50 17.36 c 154.50 189.50 375.00 499.00 748.00 619.00 495.00 180.00 o 154.50 56.00 3334.36
1912 102.00 96.50 114.50 265.50 533.00 591.50 752.50 640.50 574.50 328.00 188.00 63.00 4249.50
1913 7.50 33.00 82.50 261.50 412.00 594.50 714.00 762.00 588.50 340.00 173.50 23.00 f 3969.00
1914 176.00 52.00 103.33 d 312.93 a 537.16 b 547.50 d 0.00 z 688.72 a 477.50 447.00 303.62 a 0.00 z 3645.76
1915 22.00 h 153.50 303.00 404.00 493.02 e 617.00 740.50 802.50 539.50 401.50 76.00 145.00 4675.52
1916 8.50 86.00 126.00 249.00 345.50 570.50 656.50 729.00 538.50 297.50 124.50 28.00 3759.50
1917 63.00 52.50 72.50 201.00 391.50 525.00 730.00 751.00 560.00 374.50 234.00 113.50 4068.50
1918 94.00 29.00 114.00 275.00 0.00 z 638.50 721.50 733.50 650.00 413.00 147.50 77.50 3893.50
1919 111.50 79.50 200.00 363.00 484.00 0.00 z 0.00 z 0.00 z 606.21 a 272.69 d 102.00 55.00 2273.89
1920 14.47 a 0.00 20.00 24.50 143.50 272.00 h 636.00 607.00 413.50 0.00 z 132.50 134.50 2125.97
1921 77.50 g 135.00 168.00 246.00 444.00 638.00 665.50 717.00 538.00 420.00 221.00 86.00 4278.50
1922 20.50 29.50 72.50 235.00 494.50 680.00 738.50 725.00 634.50 451.00 136.50 85.00 4302.50
1923 99.31 d 33.00 149.50 352.50 461.00 636.00 778.50 787.40 a 638.04 b 465.52 a 241.00 114.50 4756.27
1924 83.70 a 206.00 155.50 284.00 540.90 b 632.50 722.82 a 719.50 617.00 418.50 159.00 114.00 4653.41
1925 94.50 146.00 161.50 351.00 574.00 629.50 777.50 709.50 604.00 358.00 166.00 189.50 4761.00
1926 72.50 168.00 285.00 462.00 517.00 683.00 806.50 744.00 538.00 451.50 269.00 90.00 5086.50
1927 71.00 91.50 115.00 266.50 379.50 637.00 759.50 790.50 557.50 414.00 191.00 42.00 4315.00
1928 110.50 84.50 239.50 269.50 553.00 594.00 781.00 700.00 568.00 380.50 199.00 61.00 4540.50
1929 10.00 18.00 143.50 215.36 b 445.00 565.00 590.00 f 761.50 619.00 407.00 f 133.50 110.57 a 3021.42
1930 20.50 119.50 186.50 382.50 413.50 558.00 702.00 781.50 577.00 339.00 168.75 b 93.50 4342.25
1931 176.00 122.50 225.50 0.00 z 0.00 z 635.00 800.00 781.50 602.50 412.00 137.00 63.55 a 3955.55
1932 50.63 a 91.50 218.00 358.50 489.00 689.50 688.00 777.50 635.50 472.50 265.50 67.00 4803.13
1933 53.50 40.00 180.00 309.50 417.50 593.00 727.00 819.50 523.97 a 424.50 197.00 145.00 4430.47
1934 165.00 217.00 371.50 514.50 591.50 674.00 732.50 812.50 581.00 471.00 279.00 110.50 5520.00
1935 133.50 148.00 104.00 284.50 500.50 648.50 760.00 749.00 674.00 379.50 129.00 135.50 4646.00
1936 120.00 24.50 144.00 411.50 602.50 701.50 789.00 831.50 603.50 499.00 186.00 123.00 5036.00
1937 0.00 63.50 274.00 274.00 521.50 704.50 784.00 764.00 651.00 511.50 247.00 150.00 4945.00
1938 89.50 117.50 207.00 400.00 530.00 677.00 835.00 729.00 705.50 452.50 144.50 133.00 5020.50
1939 124.00 40.50 192.00 405.00 525.00 565.56 c 793.50 814.00 601.50 413.00 308.50 213.50 4996.06
1940 113.67 a 155.50 278.50 404.50 571.50 698.00 775.50 767.77 a 708.50 507.00 126.00 163.78 a 5270.22
1941 126.07 a 177.50 347.50 430.00 515.00 664.50 902.50 782.50 565.50 387.50 276.50 122.50 5297.57
1942 101.00 78.00 190.28 b 347.50 505.50 579.00 888.50 851.50 682.00 524.42 a 147.50 118.32 a 5013.51
1943 23.50 128.00 161.00 386.38 a 446.50 591.00 741.23 c 767.80 c 702.00 465.00 225.50 87.32 a 4725.23
1944 97.50 77.00 140.50 325.50 494.50 625.86 a 819.20 d 757.95 a 706.50 538.50 183.50 70.50 4837.02
1945 122.50 104.50 138.98 a 226.50 569.00 596.50 831.00 769.50 557.00 442.27 a 148.00 114.70 a 4620.45
1946 91.00 94.50 151.90 a 285.50 570.40 a 597.93 a 800.66 b 0.00 z 402.50 j 304.46 c 62.50 g 86.50 h 2896.35
1947 34.62 a 0.00 z 281.00 395.00 c 595.50 651.72 a 784.50 559.50 h 0.00 z 0.00 z 157.50 131.00 3030.84
1948 57.50 71.00 149.50 229.00 483.00 728.00 765.50 736.50 602.50 381.50 142.50 26.00 4372.50
1949 7.00 62.50 202.00 371.00 594.00 638.00 750.20 a 763.50 653.50 302.50 309.50 80.00 4733.70
1950 11.00 96.50 115.50 240.50 398.50 661.50 785.00 815.00 630.50 378.00 175.50 195.30 a 4502.80
1951 50.50 83.00 114.50 371.90 a 523.00 720.00 850.50 790.50 667.00 409.00 185.00 40.00 4804.90
1952 48.00 98.50 138.50 329.00 518.00 418.50 g 786.88 a 807.50 688.00 509.50 143.50 106.43 a 4173.82
1953 188.00 112.00 208.73 a 269.00 533.00 572.00 847.00 807.00 638.00 457.00 257.00 100.50 4989.23
1954 38.00 103.50 159.65 a 269.00 489.44 e 571.50 682.00 707.50 615.00 421.00 351.00 146.50 4554.09
1955 52.70 a 51.85 a 102.50 214.00 411.50 593.50 711.50 744.50 618.50 431.23 c 116.90 a 56.32 a 4105.00
1956 58.90 a 21.50 110.00 335.00 618.50 574.50 867.50 842.00 663.00 401.28 d 186.50 142.50 4821.18
1957 28.00 75.50 203.00 371.00 656.00 572.50 f 0.00 z 0.00 z 550.50 i 358.00 g 207.50 199.43 a 1740.43
1958 12.00 z 275.50 198.40 a 352.50 681.48 a 765.00 c 959.40 b 866.34 c 498.00 g 462.02 e 138.00 h 0.00 z 4560.64
1959 126.07 a 86.92 d 193.75 a 356.50 483.50 626.00 699.50 f 753.82 a 556.55 a 399.00 161.00 81.50 3824.60
1960 64.00 110.50 181.00 333.50 441.50 635.00 872.50 740.38 a 568.50 438.17 e 171.72 a 35.50 r 4556.78
1961 112.50 f 92.50 159.59 d 0.00 z 216.50 s 480.50 i 411.50 q 561.50 k 379.00 k 329.08 e 141.00 e 47.00 q 722.17
1962 88.41 d 160.00 83.50 k 371.25 b 422.00 390.00 j 583.00 f 497.00 k 407.50 k 451.64 b 259.04 d 167.40 a 1919.73
1963 28.00 258.00 197.62 c 336.21 a 573.50 591.11 c 679.23 c 741.42 a 692.31 d 365.00 f 187.00 91.34 c 4375.74
1964 0.00 z 0.00 z 167.92 a 263.00 446.00 590.69 a 0.00 z 0.00 z 561.50 423.00 39.50 i 58.50 2510.61
1965 56.50 96.00 211.50 341.00 438.50 645.00 863.00 818.00 568.50 508.50 296.50 103.00 4946.00
1966 84.50 99.50 184.97 a 335.50 503.50 629.00 750.50 814.50 697.00 421.00 208.50 188.50 4916.97
1967 112.50 116.50 120.50 223.00 511.00 740.50 846.00 958.50 782.50 462.50 227.00 88.00 5188.50
1968 83.50 196.50 267.50 274.00 530.50 632.00 863.00 776.00 617.00 392.00 204.50 48.50 4885.00
1969 17.50 63.00 201.00 304.50 583.50 780.50 773.00 733.00 629.00 397.00 207.00 131.00 4820.00
1970 82.00 194.50 195.00 236.00 477.50 729.00 796.00 774.00 548.04 b 369.00 235.50 40.00 4676.54
1971 94.50 95.00 93.00 282.50 496.50 541.00 827.50 918.00 593.50 357.00 196.00 22.50 4517.00
1972 45.00 107.00 226.00 222.00 574.00 616.00 839.00 886.00 573.50 377.00 216.50 109.00 4791.00
1973 88.00 146.00 211.00 328.50 557.50 604.00 806.50 708.50 663.00 413.50 115.00 149.50 4791.00
1974 90.00 88.00 175.50 276.72 a 422.00 642.50 765.00 836.00 771.50 458.50 221.00 145.50 4892.22
1975 68.00 66.50 127.00 208.00 506.00 603.50 821.00 713.50 686.00 405.50 193.00 121.50 4519.50
1976 117.00 84.00 125.00 327.00 522.50 569.50 790.50 714.50 677.50 447.00 246.00 135.00 4755.50
1977 55.50 208.00 152.50 407.00 451.50 685.50 764.50 946.50 595.00 410.00 165.00 109.50 4950.50
1978 129.00 186.00 291.50 342.00 519.00 645.00 f 859.73 a 816.50 601.50 490.50 100.00 69.23 a 4404.97
1979 15.50 j 16.00 j 336.00 316.73 d 619.50 736.00 0.00 z 485.50 m 777.93 a 520.00 177.50 177.50 3661.16
1980 37.72 a 162.00 211.50 452.50 562.13 a 606.67 c 842.50 780.00 684.50 530.00 246.00 193.00 5308.52
1981 164.62 b 139.42 d 337.50 343.93 b 535.00 623.00 799.69 d 977.50 706.50 379.50 247.00 85.00 5338.65
1982 55.00 116.00 183.50 288.00 546.50 801.50 786.50 840.00 700.50 458.00 140.50 71.50 4987.50
1983 167.50 224.00 283.50 397.50 673.50 667.50 810.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3224.00
Period of Record Statistics
MEAN 76.17 104.64 181.44 311.86 502.36 631.64 778.31 771.71 619.00 418.66 191.22 105.53 4740.19
S.D. 47.44 59.90 70.35 77.93 83.87 62.80 65.28 73.97 70.02 60.46 58.36 47.15 371.29
SKEW 0.40 0.67 0.58 -0.34 -0.95 0.49 0.03 0.32 -0.01 -0.15 0.47 0.27 -0.49
MAX 188.00 275.50 371.50 514.50 681.48 801.50 959.40 977.50 782.50 538.50 351.00 213.50 5520.00
MIN 0.00 0.00 20.00 24.50 143.50 499.00 636.00 591.00 413.50 272.69 76.00 19.50 3759.50
NO YRS 69 72 74 73 72 68 66 66 67 68 71 68 50