KENT, WASHINGTON

Monthly Total Growing Degree Days

(454169)

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
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 0.00 z 0.00 z 732.50 698.03 b 389.50 k 0.00 z 189.50 171.50 2317.00
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 0.00 z 615.00 752.00 789.00 551.00 319.50 224.50 37.50 4162.50
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 0.00 z 74.50 13.00 3767.00
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 0.00 z 584.50 778.50 751.00 600.50 0.00 z 171.00 84.50 3621.00
1989 72.00 35.50 142.50 391.00 493.50 683.00 0.00 z 0.00 z 0.00 z 370.34 c 183.00 61.00 k 2370.84
1990 106.00 0.00 z 241.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 725.50 364.00 0.00 z 37.50 1474.00
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 0.00 z 649.50 696.00 811.00 653.50 481.50 91.50 93.00 a 4196.50
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 0.00 z 179.50 236.50 361.50 623.50 689.50 878.50 744.00 733.00 397.50 281.50 112.00 5237.00
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 0.00 z 95.50 5148.10
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 92.50 210.50 362.00 558.52 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1374.02
Period of Record Statistics
MEAN 85.50 111.08 188.25 312.37 505.05 639.05 787.48 777.46 605.47 376.24 158.98 80.86 4602.67
S.D. 44.76 47.37 63.07 59.68 70.29 57.91 65.90 66.34 64.73 50.75 55.87 38.52 383.04
SKEW 0.20 0.36 0.30 0.00 0.41 0.37 0.36 0.12 0.14 0.38 0.31 0.23 0.48
MAX 182.26 215.50 340.00 454.50 659.78 769.00 934.00 914.50 733.00 488.00 282.00 171.50 5499.50
MIN 3.10 14.50 72.00 190.00 370.00 526.50 683.50 644.00 493.50 283.50 68.28 13.00 3846.90
NO YRS 55 56 55 55 50 52 52 53 52 47 52 53 37