KENT, WASHINGTON

Monthly Total Growing Degree Days

(454169)

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
1912 0.00 z 0.00 z 0.00 z 259.50 517.50 617.00 712.50 690.50 527.50 267.50 156.00 41.50 3789.50
1913 9.50 45.00 99.00 276.50 438.00 625.00 711.00 763.50 541.00 308.50 135.00 54.00 4006.00
1914 100.00 110.50 243.50 352.00 524.50 601.00 727.50 701.00 516.50 439.50 173.50 14.50 4504.00
1915 31.00 103.00 290.88 a 358.50 482.00 610.50 766.00 770.50 548.50 405.50 88.00 71.50 4525.88
1916 3.50 100.00 151.50 291.00 381.00 551.50 653.58 a 710.50 525.00 211.00 76.50 30.50 3685.58
1917 47.07 d 46.50 39.78 a 0.00 z 0.00 z 264.50 o 677.50 704.00 530.00 352.50 242.50 169.95 c 2809.80
1918 142.00 43.00 152.50 262.50 375.00 610.50 294.50 q 0.00 z 583.85 d 396.00 130.50 57.50 2753.35
1919 62.50 49.00 133.82 a 284.00 414.00 378.50 g 670.50 683.50 537.00 250.50 131.00 65.50 3281.32
1920 74.50 29.50 g 139.00 180.00 349.00 565.50 780.00 742.00 553.50 302.50 169.00 82.00 3937.00
1921 72.50 172.00 189.00 255.00 443.00 629.00 650.50 706.50 466.55 a 401.45 a 159.50 82.00 4227.00
1922 9.00 24.00 107.00 229.00 523.50 669.00 683.00 708.00 475.50 290.50 46.00 50.00 3814.50
1923 0.00 z 0.00 z 167.29 b 0.00 z 194.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 361.29
1924 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 466.50 g 688.00 687.50 525.00 350.50 115.00 88.50 2454.50
1925 69.50 150.50 138.00 324.00 559.50 590.00 773.50 692.00 587.00 300.00 143.00 144.50 4471.50
1926 74.00 180.50 305.00 465.00 518.00 686.00 796.50 769.50 506.50 430.50 229.00 75.50 5036.00
1927 61.50 81.50 134.50 255.50 398.00 683.00 808.50 818.50 574.50 379.50 158.00 37.50 4390.50
1928 98.50 73.00 243.00 272.50 551.50 615.00 808.00 720.00 530.00 363.00 168.00 37.50 4480.00
1929 4.00 26.00 168.50 217.50 445.50 583.00 726.00 747.00 540.50 429.50 94.50 84.50 4066.50
1930 13.50 121.00 193.00 387.00 428.00 565.00 713.00 758.50 545.00 304.50 135.50 58.00 4222.00
1931 134.00 89.50 219.00 343.39 b 590.00 605.00 759.00 729.00 566.90 a 353.00 115.00 39.00 4542.79
1932 33.50 98.00 210.50 342.50 452.00 667.50 688.00 742.50 580.34 a 416.50 247.00 79.50 4557.84
1933 47.00 25.00 156.50 278.50 395.00 585.00 697.50 794.50 491.00 389.00 158.50 149.00 4166.50
1934 135.00 175.00 328.50 456.50 545.00 619.00 708.00 746.50 541.50 430.50 245.00 86.50 5017.00
1935 108.00 97.50 86.00 251.00 468.50 621.00 738.50 737.00 628.00 352.00 96.00 103.00 4286.50
1936 94.00 20.50 125.00 357.50 537.00 649.50 743.00 782.75 a 524.50 408.00 105.50 110.00 4457.25
1937 0.00 53.50 252.00 256.50 478.00 644.50 757.00 715.50 572.00 456.50 197.50 118.00 4501.00
1938 53.50 71.00 165.50 353.50 466.50 610.00 768.00 665.35 d 651.50 364.00 132.00 120.00 4420.85
1939 120.00 36.00 197.50 349.50 488.00 631.07 b 783.00 766.00 514.00 349.04 d 160.50 170.50 d 4565.11
1940 135.50 190.00 289.50 406.50 563.50 634.50 757.50 746.07 a 655.00 518.00 134.50 156.00 5186.57
1941 136.00 179.50 313.50 406.00 514.50 623.50 868.50 802.50 591.50 427.36 c 222.00 111.00 5195.86
1942 49.00 73.50 151.50 304.00 451.50 601.00 820.50 694.50 f 608.00 468.50 0.00 z 0.00 z 3527.50
1943 19.50 105.00 148.50 382.50 428.00 584.00 753.50 0.00 z 616.00 373.03 a 121.50 50.12 a 3581.65
1944 49.00 57.00 96.00 292.00 455.50 593.28 a 781.00 713.53 b 628.50 448.00 174.50 52.00 4340.31
1945 123.00 121.50 149.50 257.00 575.00 0.00 z 0.00 z 0.00 z 0.00 z 210.50 k 0.00 z 98.00 1324.00
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 118.74 a 0.00 z 321.96 b 517.18 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 155.00 0.00 z 1112.89
1948 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 142.50 17.50 160.00
1949 3.10 a 8.50 i 187.50 306.00 527.00 569.50 0.00 z 712.50 0.00 z 0.00 z 0.00 z 17.50 n 2305.60
1950 0.50 i 87.50 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 178.00 g 87.50
1951 55.50 83.00 120.50 378.89 c 539.00 715.00 847.50 761.50 637.22 c 356.50 136.03 a 34.50 4665.15
1952 44.50 86.50 137.00 330.50 521.50 585.00 819.00 825.00 624.83 a 445.76 b 96.50 73.00 4589.09
1953 182.26 b 80.50 200.00 294.50 490.32 a 566.00 781.50 775.00 602.68 b 362.00 180.50 79.00 4594.25
1954 29.00 110.00 114.50 259.50 494.50 559.50 689.00 675.50 588.50 331.50 282.00 83.50 4217.00
1955 53.00 41.50 72.00 190.00 412.00 620.50 687.50 710.00 565.50 347.50 101.90 a 45.50 3846.90
1956 55.00 14.50 109.00 326.00 579.70 a 561.00 830.00 773.00 574.00 325.50 99.31 a 107.00 4354.01
1957 11.37 a 54.00 177.73 a 373.50 627.50 678.50 731.60 a 714.50 673.00 314.50 69.00 75.84 c 4501.04
1958 85.50 204.00 159.59 d 328.50 659.78 a 761.00 919.50 810.50 578.50 396.00 150.50 152.13 d 5205.51
1959 102.09 b 62.22 a 151.50 313.45 a 427.00 630.50 769.50 674.00 493.50 329.00 100.34 a 48.50 4101.60
1960 46.50 71.46 a 159.28 b 291.00 400.50 581.50 791.00 703.00 517.24 a 370.50 121.00 50.00 4102.98
1961 130.50 125.00 188.67 b 233.50 462.93 a 707.07 a 821.00 842.00 513.10 a 286.50 68.28 a 60.00 4438.55
1962 59.93 a 131.70 a 115.22 a 327.93 a 370.00 579.00 739.50 711.85 d 600.54 b 380.50 177.93 a 117.28 a 4311.39
1963 30.48 a 196.50 124.00 a 258.50 384.50 f 589.50 701.00 711.45 a 682.50 319.50 f 158.00 86.00 3537.93
1964 71.00 61.50 162.00 226.55 a 423.00 605.50 748.50 721.00 542.50 381.50 82.00 42.00 4067.05
1965 68.50 91.00 168.00 330.50 411.55 b 629.00 827.00 801.50 522.50 471.00 245.00 72.50 4638.05
1966 72.50 93.00 184.50 304.00 469.50 597.00 729.50 759.50 639.50 350.50 160.34 a 144.50 4504.34
1967 98.00 90.00 91.50 196.00 492.50 731.50 794.00 903.50 705.50 434.50 182.00 102.00 4821.00
1968 83.00 176.50 247.00 268.50 512.00 613.00 838.03 a 722.00 580.00 336.00 153.50 39.00 4568.53
1969 13.00 47.50 180.50 286.00 565.23 a 769.00 752.00 676.83 a 593.28 a 325.50 164.50 95.50 4468.84
1970 74.50 142.50 167.40 a 225.50 468.62 a 696.50 778.00 734.00 505.34 a 311.50 184.50 35.00 4323.36
1971 101.50 91.00 96.10 a 275.50 492.12 c 526.50 799.00 841.43 c 541.00 347.50 168.00 29.50 4309.15
1972 45.00 115.50 234.50 209.50 560.00 608.00 763.50 752.00 494.50 283.50 151.00 102.00 4319.00
1973 80.00 118.00 194.00 284.00 507.50 618.62 a 743.50 644.00 581.00 345.50 88.00 116.00 4320.12
1974 95.50 105.50 189.10 a 303.00 418.50 624.00 707.00 774.50 665.00 0.00 z 0.00 z 137.50 4019.60
1975 66.50 75.50 125.00 196.50 478.43 a 592.50 791.07 d 692.50 611.50 374.50 167.00 127.00 4298.01
1976 102.00 68.50 117.80 a 287.00 502.95 b 119.50 v 736.25 a 701.63 a 637.76 a 360.12 a 191.25 b 103.00 3808.26
1977 39.50 159.50 130.00 354.00 417.00 638.00 717.00 878.52 c 510.50 0.00 z 140.50 0.00 z 3984.52
1978 131.00 161.00 243.50 0.00 z 461.90 a 706.61 b 798.50 773.00 552.50 402.00 0.00 z 42.00 4272.01
1979 12.29 b 83.50 0.00 z 305.00 c 371.50 h 618.00 808.50 776.03 a 0.00 z 0.00 z 115.00 148.50 2866.83
1980 14.00 f 136.50 0.00 z 388.97 a 288.00 k 566.38 a 732.50 698.03 b 389.50 k 353.83 b 189.50 171.50 3237.21
1981 109.00 138.00 265.50 302.22 c 440.20 a 546.67 c 715.77 c 834.42 a 597.00 0.00 z 150.00 0.00 z 4098.77
1982 79.50 113.50 148.00 238.00 476.00 709.00 692.00 758.00 629.48 a 375.00 89.50 59.00 4366.98
1983 147.00 183.00 249.00 295.00 547.50 615.00 752.00 789.00 551.00 319.50 224.50 37.50 4710.00
1984 163.00 140.50 280.00 277.00 451.00 604.00 789.00 757.00 607.76 a 287.00 139.00 23.50 4518.76
1985 15.00 46.00 97.50 306.00 486.00 629.00 847.50 748.00 504.50 342.00 74.50 13.00 4109.00
1986 131.50 135.50 297.50 272.00 486.50 684.00 683.50 571.50 j 555.00 421.50 158.00 54.50 3879.50
1987 76.00 151.00 244.00 400.00 520.00 664.00 726.95 a 774.50 636.00 406.00 234.00 56.50 4888.95
1988 37.00 125.50 162.00 326.50 483.50 584.50 778.50 751.00 600.50 473.00 171.00 84.50 4577.50
1989 72.00 35.50 142.50 391.00 493.50 683.00 707.66 b 573.50 f 633.33 c 370.34 c 183.00 61.00 k 3711.83
1990 106.00 93.50 241.00 408.50 510.47 a 662.00 902.00 872.50 725.50 364.00 0.00 z 37.50 4922.97
1991 74.00 215.50 136.00 302.00 467.50 594.00 854.00 856.50 660.00 399.50 223.50 125.00 4907.50
1992 149.00 207.50 301.00 429.00 639.00 0.00 z 0.00 z 848.00 608.50 434.00 169.50 41.33 a 3826.83
1993 56.00 81.00 255.50 328.00 682.00 c 649.50 696.00 811.00 653.50 481.50 91.50 93.00 a 4878.50
1994 154.00 65.00 261.50 396.00 591.50 629.50 886.50 839.50 731.50 380.00 83.00 95.50 5113.50
1995 161.20 a 179.50 236.50 361.50 623.50 689.50 878.50 744.00 733.00 397.50 281.50 112.00 5398.20
1996 99.50 150.50 247.00 401.50 454.50 639.31 a 895.00 850.00 559.50 383.00 161.50 44.50 4885.81
1997 98.50 101.00 200.00 345.00 636.50 654.50 827.00 914.50 697.50 387.00 263.00 67.00 5191.50
1998 150.50 181.00 249.00 349.50 531.00 679.50 911.00 869.00 703.50 411.00 210.50 117.50 5363.00
1999 104.22 b 100.59 a 181.72 b 317.88 d 422.38 c 612.86 b 764.67 a 821.50 d 659.42 d 361.09 d 251.38 a 108.50 b 4706.22
2000 56.83 a 132.00 182.38 a 382.50 497.50 674.50 801.50 756.92 a 639.50 399.56 d 109.50 73.07 c 4705.76
2001 103.85 a 59.23 b 205.12 a 277.78 c 537.00 598.50 759.50 810.17 e 615.00 b 354.29 c 215.17 a 70.78 a 4606.39
2002 101.00 93.00 120.50 309.00 474.00 696.72 a 827.00 823.10 b 610.50 370.00 220.00 123.00 4767.83
2003 170.50 83.50 247.00 332.50 558.60 e 731.00 901.50 843.00 697.00 488.00 110.00 95.50 5258.10
2004 102.50 148.50 305.50 454.50 590.00 739.50 934.00 889.00 603.00 442.50 181.50 109.00 5499.50
2005 153.00 97.00 340.00 371.50 625.50 645.00 836.00 867.50 572.68 b 481.50 116.00 106.50 5212.18
2006 150.50 92.50 216.00 362.00 550.50 718.50 885.50 810.00 675.00 394.50 186.00 74.50 5115.50
2007 60.00 147.50 307.42 a 358.00 538.00 647.00 879.50 802.00 623.00 362.00 165.00 64.50 4953.92
2008 42.00 129.50 135.00 236.00 545.50 592.50 803.00 832.50 619.50 373.00 281.50 62.50 4652.50
2009 54.50 72.50 126.50 303.50 0.00 z 740.00 946.02 a 825.50 695.50 371.50 215.50 56.00 4407.02
2010 212.00 188.50 258.50 322.00 442.00 584.50 805.50 819.00 664.00 430.00 191.00 124.00 5041.00
2011 113.50 62.00 190.65 a 217.50 438.50 599.42 d 777.58 a 826.48 c 722.50 386.47 a 96.00 52.00 4482.61
2012 63.00 131.02 a 134.85 a 376.11 c 460.50 582.00 786.76 b 880.06 d 703.93 b 394.50 177.00 66.50 4756.22
2013 37.00 109.00 198.50 17.50 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 344.50
Period of Record Statistics
MEAN 80.37 105.17 186.11 313.09 493.04 631.03 776.21 768.75 593.51 376.41 157.65 81.23 4587.66
S.D. 47.20 48.75 65.96 62.80 75.65 52.43 68.18 62.41 65.60 56.44 53.87 38.67 395.23
SKEW 0.34 0.31 0.36 0.15 -0.28 0.62 0.44 0.30 0.26 -0.09 0.33 0.44 0.24
MAX 212.00 215.50 340.00 465.00 682.00 769.00 946.02 914.50 733.00 518.00 282.00 171.50 5499.50
MIN 0.00 14.50 39.78 180.00 194.00 526.50 650.50 644.00 466.55 211.00 46.00 13.00 3685.58
NO YRS 94 95 94 94 92 90 92 90 92 89 92 92 73