KENT, WASHINGTON

Monthly Total Heating Degree Days

(454169)

Base Temperature = 65 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 490.50 262.00 148.00 90.00 96.50 231.50 507.50 605.00 787.00 3218.00
1913 938.50 732.00 712.00 473.50 337.00 138.50 106.00 66.00 210.00 466.50 626.00 772.00 5578.00
1914 702.00 628.50 535.50 398.00 252.50 165.50 64.00 90.50 235.00 335.50 586.50 941.50 4935.00
1915 837.50 603.50 484.12 a 391.50 293.00 144.00 51.50 36.00 202.50 369.50 696.00 766.00 4875.12
1916 1138.00 686.00 633.50 459.00 394.00 201.00 126.07 a 92.00 225.00 564.00 748.50 860.00 6127.07
1917 888.09 d 723.00 750.20 a 0.00 z 0.00 z 110.50 o 101.00 76.00 220.50 427.00 512.00 638.27 c 4336.06
1918 668.50 732.00 648.50 487.50 400.00 150.50 59.50 q 0.00 z 171.35 d 379.00 629.50 811.50 5078.35
1919 808.00 685.50 641.70 a 466.00 361.00 196.50 g 117.00 99.00 216.50 532.00 650.00 925.00 5501.70
1920 835.50 553.00 g 645.00 576.50 426.00 189.50 31.00 77.50 199.50 472.50 581.00 711.50 4745.50
1921 734.50 552.50 595.00 495.00 332.00 123.00 126.50 82.50 283.45 a 373.55 a 607.00 826.00 5131.00
1922 954.00 762.00 681.50 521.00 258.50 84.50 92.50 83.50 274.50 484.50 754.00 960.50 5911.00
1923 0.00 z 0.00 z 609.31 b 0.00 z 585.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1194.81
1924 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 120.00 g 110.50 101.00 237.00 424.50 672.50 929.00 2474.50
1925 737.00 553.00 637.00 426.00 228.50 176.00 40.50 94.50 165.50 475.00 629.50 659.00 4821.50
1926 773.50 521.00 470.00 286.00 266.00 95.00 46.50 47.50 245.00 344.50 522.50 788.50 4406.00
1927 794.50 641.50 643.50 496.00 377.00 82.00 30.00 41.00 176.50 395.50 596.00 904.00 5177.50
1928 756.50 673.50 532.00 477.50 230.00 141.50 42.00 70.50 220.00 412.00 603.50 849.50 5008.50
1929 994.50 913.00 606.50 536.00 329.50 169.00 65.50 56.50 210.00 346.50 689.50 732.50 5649.00
1930 1105.50 615.00 590.50 363.00 347.00 186.50 84.50 55.00 208.00 470.50 658.50 791.50 5475.50
1931 658.00 615.50 562.00 406.61 b 186.50 155.50 47.50 61.50 191.90 a 422.00 706.50 799.00 4812.50
1932 855.50 709.50 570.00 407.50 323.00 113.00 103.00 61.50 178.45 a 358.50 507.00 849.50 5036.45
1933 801.50 794.50 624.50 471.50 380.00 170.50 93.00 41.00 259.00 386.00 598.50 644.50 5264.50
1934 653.50 525.00 446.50 293.50 230.50 133.00 76.00 57.50 213.50 347.50 506.00 706.50 4189.00
1935 799.50 616.00 699.50 501.50 306.50 146.00 99.00 79.00 144.50 443.50 728.50 720.00 5283.50
1936 709.50 898.00 679.50 395.50 246.50 102.00 41.50 29.97 a 227.00 367.00 681.50 714.00 5091.97
1937 1139.50 708.50 524.50 493.50 297.00 120.00 45.00 83.50 181.00 318.50 557.50 691.50 5160.00
1938 772.00 650.00 619.50 396.50 308.50 154.50 58.50 114.81 d 109.00 411.00 653.50 742.50 4990.31
1939 664.50 715.50 577.50 400.50 287.00 158.04 b 55.50 62.50 239.00 429.98 d 589.50 624.59 d 4804.11
1940 666.00 539.00 485.50 343.50 211.50 124.50 42.00 54.77 a 107.00 258.50 634.50 655.50 4122.27
1941 655.00 520.50 461.50 344.00 260.50 138.00 17.00 43.50 159.00 349.86 c 533.00 708.50 4190.36
1942 854.00 654.50 629.00 446.00 323.50 165.00 23.50 12.50 f 142.50 308.50 0.00 z 0.00 z 3546.50
1943 960.50 599.00 634.00 367.50 347.00 172.00 64.00 0.00 z 135.50 401.97 a 642.00 860.25 a 5183.72
1944 800.50 703.50 693.50 458.00 319.50 165.00 a 43.50 87.12 b 137.00 327.00 577.00 840.00 5151.62
1945 715.00 596.50 632.50 493.00 200.00 0.00 z 0.00 z 0.00 z 0.00 z 290.00 k 0.00 z 748.50 3385.50
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 608.22 a 0.00 z 428.04 b 266.08 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 606.50 0.00 z 1908.84
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 212.00 k 183.62 a 69.00 99.41 b 87.50 k 421.71 b 576.00 655.50 2975.28
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 658.50 521.00 526.00 455.00 247.50 136.00 48.50 24.00 201.00 455.50 530.00 921.50 4724.50
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 58.00 245.50 433.00 909.00 938.50 5770.50
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 790.50 622.00 613.00 423.50 295.00 180.50 55.00 57.50 173.00 302.00 583.00 757.50 4852.50
1989 749.00 848.50 662.50 359.00 282.50 98.00 83.38 b 59.00 f 122.22 c 405.77 c 567.50 476.50 k 4178.37
1990 686.50 680.50 535.00 342.00 264.53 a 117.50 20.00 17.00 54.00 411.00 0.00 z 932.50 4060.53
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 853.00 674.00 519.50 422.00 114.04 c 113.00 80.00 42.50 132.00 293.50 716.00 772.42 a 4731.95
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 634.98 a 545.00 540.50 388.50 160.00 107.00 8.50 65.00 49.00 377.50 471.00 724.00 4070.98
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 92.00 291.50 668.50 708.00 4293.04
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 626.00 654.50 561.50 388.00 235.50 74.00 21.50 27.50 107.00 386.00 595.50 755.00 4432.00
2007 811.00 568.50 472.75 a 393.00 247.00 132.00 5.50 25.50 151.00 413.00 607.50 748.00 4574.75
2008 814.00 605.50 645.00 514.50 247.50 199.50 26.00 42.00 133.00 402.00 468.50 866.00 4963.50
2009 802.00 648.50 669.00 447.50 0.00 z 51.50 21.18 a 24.50 91.50 403.50 538.00 870.00 4567.18
2010 565.50 514.00 519.00 428.00 333.00 169.50 57.00 51.00 106.50 345.00 622.50 677.00 4388.00
2011 721.00 693.50 587.45 a 532.50 336.50 151.15 d 30.48 a 14.95 c 71.00 388.53 a 682.50 808.00 5017.57
2012 781.50 602.79 a 650.48 a 373.89 c 435.00 170.50 33.14 b 13.78 d 76.61 b 460.50 737.50 850.00 5185.68
2013 966.50 714.00 736.50 7.50 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 2417.00
Period of Record Statistics
MEAN 785.84 637.20 598.96 437.28 287.51 137.03 54.63 55.17 166.83 400.42 619.49 775.76 4926.25
S.D. 120.06 82.70 75.04 62.98 73.43 39.03 30.27 31.36 57.05 57.03 77.76 84.31 446.38
SKEW 0.95 0.84 -0.15 -0.13 0.47 -0.23 0.40 0.29 -0.09 0.06 0.52 0.27 0.15
MAX 1139.50 913.00 764.00 576.50 585.50 229.00 126.50 143.00 283.45 564.00 909.00 960.50 6127.07
MIN 565.50 484.50 435.00 286.00 114.04 51.50 4.00 4.50 43.50 258.50 468.50 624.59 4070.98
NO YRS 94 95 94 94 92 90 92 90 92 89 92 92 73