KENT, WASHINGTON

Monthly Total Heating Degree Days

(454169)

Base Temperature = 65 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 621.50 888.00 1509.50
1949 1101.53 a 568.50 i 589.50 444.00 249.00 180.50 0.00 z 85.00 0.00 z 0.00 z 0.00 z 485.50 n 2649.53
1950 864.00 i 727.00 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 423.00 g 727.00
1951 811.50 648.00 710.50 371.11 c 240.50 73.00 17.00 53.50 127.78 c 419.50 628.45 a 855.50 4956.34
1952 868.50 672.00 642.50 419.50 257.50 166.00 35.00 39.50 134.48 a 329.24 b 747.00 740.00 5051.22
1953 599.69 b 630.50 586.00 455.50 291.40 a 184.00 38.50 39.50 159.11 b 413.00 573.00 722.00 4692.20
1954 885.00 595.00 682.50 490.50 280.50 192.00 98.00 108.00 161.50 443.50 477.50 750.00 5164.00
1955 770.50 713.00 764.00 560.00 363.00 161.00 100.50 82.50 193.50 427.50 785.69 a 840.50 5761.69
1956 811.50 849.00 712.50 424.00 215.45 a 198.00 36.50 48.50 177.50 449.50 697.76 a 757.00 5377.21
1957 1018.35 a 700.00 597.78 a 377.00 155.50 79.50 61.48 a 67.50 90.00 460.50 713.00 735.14 c 5055.76
1958 724.50 500.00 624.59 d 421.50 141.05 a 61.50 4.00 16.00 177.00 379.00 661.50 640.09 d 4350.74
1959 749.34 b 671.48 a 626.00 436.55 a 351.50 133.00 70.00 110.00 256.50 446.00 688.45 a 804.50 5343.33
1960 835.00 696.00 a 654.74 b 459.00 374.50 169.50 53.50 109.00 233.79 a 404.50 657.00 837.00 5483.53
1961 686.50 582.50 592.74 b 517.50 315.17 a 91.03 a 31.50 16.50 250.86 a 488.50 748.97 a 793.50 5115.27
1962 855.08 a 639.85 a 695.43 a 422.07 a 405.00 175.50 86.50 80.37 d 150.00 b 394.50 581.38 a 722.30 a 5207.99
1963 955.83 a 509.50 653.58 a 491.50 254.00 f 172.00 77.50 83.70 a 92.50 305.50 f 618.00 743.00 4397.12
1964 729.00 684.00 615.50 523.45 a 356.50 148.00 55.00 82.00 207.50 393.50 709.00 885.50 5388.95
1965 761.00 623.00 624.00 419.50 363.45 b 125.50 37.00 41.00 227.50 304.00 513.00 801.00 4839.95
1966 765.00 621.50 604.50 446.00 305.50 165.00 59.00 50.00 110.50 424.50 597.93 a 644.50 4793.93
1967 702.50 618.00 698.00 554.00 285.00 56.00 22.50 5.00 71.50 340.50 578.00 764.00 4695.00
1968 779.50 551.50 528.00 481.50 264.50 151.50 29.97 a 86.00 177.00 439.00 601.50 902.00 4991.97
1969 1010.50 675.00 595.50 464.00 219.58 a 53.00 53.50 105.92 a 161.38 a 449.50 605.00 703.50 5096.38
1970 770.00 563.50 611.73 a 524.50 306.38 a 107.00 53.50 58.50 244.66 a 464.00 608.00 825.50 5137.27
1971 778.00 657.50 709.38 a 474.50 287.30 c 229.00 77.00 11.62 c 211.00 439.00 592.50 846.00 5312.81
1972 877.00 678.00 546.50 540.50 230.50 143.00 57.00 62.00 261.50 493.50 605.00 853.50 5348.00
1973 814.50 596.00 581.00 466.00 274.00 154.14 a 72.00 143.00 171.50 429.50 691.50 674.00 5067.14
1974 834.50 600.00 595.20 a 447.00 356.50 135.00 89.50 43.50 109.00 0.00 z 0.00 z 685.00 3895.20
1975 776.50 647.50 656.00 555.50 296.57 a 164.50 44.78 d 96.00 143.00 401.50 607.50 698.00 5087.34
1976 696.00 680.50 678.38 a 466.00 273.12 b 80.50 v 69.75 a 85.77 a 120.00 a 414.88 a 593.57 b 705.50 4783.48
1977 879.50 543.00 645.50 396.00 358.00 122.50 78.50 34.88 c 241.50 0.00 z 665.50 0.00 z 3964.88
1978 662.50 545.00 531.50 0.00 z 313.10 a 91.61 b 46.50 47.50 197.50 373.00 0.00 z 892.00 3700.21
1979 918.78 b 656.00 0.00 z 445.00 c 203.50 h 142.50 50.50 27.90 a 0.00 z 0.00 z 652.00 648.00 3540.68
1980 791.00 f 609.00 0.00 z 361.03 a 0.00 z 0.00 z 69.00 99.41 b 87.50 k 0.00 z 576.00 655.50 2369.95
1981 689.50 597.50 509.50 447.78 c 334.80 a 203.33 c 88.02 c 38.75 a 179.50 0.00 z 622.00 0.00 z 3710.68
1982 774.50 633.50 627.00 512.00 299.00 88.50 98.00 57.50 140.69 a 400.00 710.00 792.50 5133.19
1983 658.50 521.00 526.00 455.00 0.00 z 136.00 48.50 24.00 201.00 455.50 530.00 921.50 4477.00
1984 684.00 585.50 495.00 473.00 325.50 158.50 45.50 54.00 153.62 a 490.50 619.50 884.50 4969.12
1985 887.00 728.00 683.50 444.00 290.50 136.00 17.50 58.00 245.50 0.00 z 909.00 938.50 5337.50
1986 645.50 608.00 477.50 478.00 301.50 88.00 93.50 12.00 j 212.00 353.50 600.50 768.50 4626.50
1987 789.50 555.00 531.00 353.50 259.00 116.00 69.23 a 47.00 134.00 370.00 526.00 843.50 4593.73
1988 790.50 622.00 613.00 423.50 0.00 z 180.50 55.00 57.50 173.00 0.00 z 583.00 757.50 4255.50
1989 749.00 848.50 662.50 359.00 282.50 98.00 0.00 z 0.00 z 0.00 z 405.77 c 567.50 476.50 k 3972.77
1990 686.50 0.00 z 535.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 54.00 411.00 0.00 z 932.50 2619.00
1991 789.50 484.50 642.50 448.00 307.50 158.00 14.00 30.00 110.00 380.50 528.00 683.50 4576.00
1992 653.50 521.50 474.00 321.00 154.00 0.00 z 0.00 z 13.50 149.50 341.50 593.50 817.88 a 4039.88
1993 853.00 674.00 519.50 422.00 0.00 z 113.00 80.00 42.50 132.00 293.50 716.00 772.42 a 4617.92
1994 639.00 693.00 516.50 354.00 184.50 123.00 17.00 8.00 43.50 395.00 695.00 742.50 4411.00
1995 0.00 z 545.00 540.50 388.50 160.00 107.00 8.50 65.00 49.00 377.50 471.00 724.00 3436.00
1996 752.00 615.50 528.00 348.50 320.50 115.34 a 33.50 23.50 191.00 392.00 630.50 784.00 4734.34
1997 735.00 616.50 576.50 405.00 150.50 98.50 15.50 4.50 82.00 388.00 487.00 737.50 4296.50
1998 675.50 519.00 527.00 403.00 250.50 90.00 14.50 11.50 77.00 364.00 539.50 748.00 4219.50
1999 684.14 b 603.04 a 593.81 b 432.12 d 354.29 c 162.32 b 60.97 a 20.09 d 113.08 d 413.91 d 498.62 a 705.52 b 4641.89
2000 748.65 a 599.50 593.13 a 367.50 277.50 115.00 37.00 57.35 a 132.00 375.44 d 672.50 742.34 c 4717.92
2001 693.88 a 671.46 b 571.95 a 472.22 c 250.00 162.50 47.00 26.83 e 138.21 b 420.71 c 535.86 a 718.17 a 4708.80
2002 719.50 618.50 676.50 441.00 301.00 112.24 a 36.50 26.19 b 142.50 405.00 534.50 670.50 4683.93
2003 609.00 638.00 528.00 417.50 226.54 e 91.50 12.50 10.00 92.00 291.50 0.00 z 708.00 3624.54
2004 752.00 583.00 469.50 295.50 188.00 74.50 9.00 4.50 150.50 332.50 577.50 681.50 4118.00
2005 689.50 612.50 435.00 379.00 174.50 119.00 17.50 7.00 177.86 b 293.50 641.50 751.00 4297.86
2006 626.00 654.50 567.00 388.00 227.85 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2463.35
Period of Record Statistics
MEAN 770.95 625.56 595.86 437.87 275.00 132.14 49.88 51.07 156.40 399.41 618.92 770.53 4903.24
S.D. 105.18 73.21 72.84 59.66 65.55 41.08 26.91 33.58 56.36 50.84 83.87 80.21 389.28
SKEW 0.90 0.68 0.01 0.01 -0.34 0.04 0.13 0.54 0.00 -0.36 0.77 0.40 -0.13
MAX 1101.53 849.00 764.00 560.00 405.00 229.00 100.50 143.00 261.50 493.50 909.00 938.50 5761.69
MIN 599.69 484.50 435.00 295.50 141.05 53.00 4.00 4.50 43.50 291.50 471.00 640.09 4118.00
NO YRS 55 56 55 55 50 52 52 53 52 47 52 53 37