KENNEWICK, WASHINGTON

Monthly Total Heating Degree Days

(454154)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1894 0.00 z 878.50 0.00 z 0.00 z 131.46 d 53.50 0.00 a 0.00 94.00 341.00 499.50 944.50 2942.46
1895 1048.50 654.00 596.50 317.50 126.50 37.00 10.33 d 3.00 200.50 396.59 b 0.00 z 0.00 z 3390.42
1896 771.00 500.00 562.50 390.00 212.00 32.50 0.00 2.50 96.50 292.00 806.00 878.00 4543.00
1897 1113.00 704.00 777.00 325.50 103.00 49.50 6.00 1.00 85.00 368.00 677.50 958.50 5168.00
1898 1039.50 586.00 643.50 307.00 77.50 24.00 0.00 7.00 68.50 366.00 653.00 1074.50 4846.50
1899 945.50 920.00 607.50 339.00 181.00 19.00 0.00 12.50 20.00 402.50 468.00 839.50 4754.50
1900 786.00 764.50 437.00 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 1987.50
1901 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
1902 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
1903 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
1904 512.00 n 778.50 674.00 257.50 150.00 17.00 k 0.00 p 3.10 a 56.90 a 0.00 z 0.00 z 0.00 z 1920.00
1905 0.00 z 836.00 465.50 297.00 179.50 0.00 z 0.00 8.00 49.00 531.00 780.54 b 982.70 a 4129.24
1906 915.53 a 703.23 b 676.83 a 237.41 a 122.40 b 36.21 a 0.00 d 1.50 74.00 f 294.50 a 610.50 h 896.00 3883.61
1907 1315.00 781.00 619.50 394.50 0.00 z 38.50 1.00 33.00 154.29 b 231.97 b 630.00 812.00 5010.75
1908 921.50 792.00 559.50 258.50 175.67 a 14.50 l 1.00 14.00 82.76 a 339.00 588.00 913.00 4644.93
1909 1280.50 648.15 a 541.00 364.50 180.50 5.00 6.00 5.50 0.00 z 382.50 570.00 1160.50 5144.15
1910 1070.50 924.00 d 94.50 t 222.00 120.00 14.00 0.00 35.77 e 87.00 209.25 a 647.59 a 808.00 4138.11
1911 970.30 a 845.00 437.00 f 326.50 198.50 26.50 1.00 0.00 57.50 m 393.00 621.50 f 982.50 3743.30
1912 1162.50 c 673.73 a 650.48 a 309.83 a 79.00 12.00 10.33 d 27.38 a 76.50 443.00 656.50 959.00 5060.26
1913 0.00 z 990.50 647.38 a 290.36 b 149.00 7.76 a 2.58 a 0.00 c 78.89 c 445.33 e 583.50 1029.09 c 4224.39
1914 563.50 h 756.54 b 317.50 k 224.50 h 93.00 a 98.28 a 0.00 0.00 104.50 316.20 a 625.50 1218.82 a 3212.83
1915 1085.50 667.92 d 449.00 240.50 194.00 17.00 1.50 0.00 106.00 243.00 689.48 a 895.00 4588.90
1916 1380.69 e 894.50 515.50 271.50 197.50 50.00 2.50 8.50 63.00 405.00 863.50 1112.50 5764.69
1917 970.00 787.50 723.50 391.03 a 176.46 e 56.00 4.28 b 0.00 b 42.93 a 335.50 622.00 651.50 4760.70
1918 811.00 777.00 513.00 296.00 198.00 17.00 0.00 5.17 a 18.50 246.00 649.00 845.00 4375.67
1919 950.00 730.00 529.00 286.50 171.00 54.00 0.00 g 0.00 a 81.50 438.00 741.00 1384.15 a 5365.15
1920 1038.50 790.50 536.50 414.00 210.50 53.50 0.50 26.00 95.00 422.50 733.00 865.00 5185.50
1921 914.50 730.59 a 538.00 361.00 131.00 24.50 14.50 6.00 176.00 363.00 672.50 1009.00 4940.59
1922 1354.50 909.00 670.50 433.50 213.50 0.00 0.00 2.50 47.50 328.50 817.00 1220.50 5997.00
1923 783.00 975.50 567.50 312.00 138.00 62.00 10.00 0.00 76.00 397.50 639.00 850.50 4811.00
1924 1167.00 579.00 588.50 0.00 z 91.00 15.50 1.00 12.00 107.50 337.50 716.50 1219.00 4834.50
1925 840.50 535.50 526.00 260.00 122.00 46.50 0.00 17.00 104.00 435.00 763.50 786.50 4436.50
1926 900.50 563.50 447.00 256.00 119.50 h 22.50 0.00 3.21 b 215.00 335.50 640.50 1028.50 4412.21
1927 1072.50 676.00 604.00 404.00 215.50 14.00 0.00 8.78 a 130.00 343.00 554.00 1092.00 5113.78
1928 1072.00 798.00 510.50 393.50 84.00 19.00 2.00 1.50 108.00 365.50 691.00 983.00 5028.00
1929 1318.00 1193.00 505.50 401.00 161.50 26.90 a 1.50 6.00 157.50 337.00 888.00 883.00 5878.90
1930 1613.00 610.00 487.50 214.50 161.50 50.00 0.00 0.00 60.50 457.50 747.50 968.00 5370.00
1931 856.50 715.50 566.50 339.00 97.50 29.50 1.00 0.00 69.50 377.00 769.00 1085.50 4906.50
1932 1045.50 829.50 572.50 289.50 175.50 28.00 6.00 10.00 98.00 331.70 a 577.00 1020.00 4983.20
1933 846.50 980.50 593.81 b 353.00 174.00 i 13.00 0.00 4.17 e 120.00 261.84 c 636.00 632.29 b 4441.12
1934 730.71 c 607.00 405.00 165.00 d 100.20 c 5.56 c 2.00 0.00 125.00 263.50 517.00 809.50 3730.47
1935 928.00 726.50 623.50 411.50 153.00 20.50 7.00 20.50 73.00 440.50 893.00 1015.50 5312.50
1936 883.00 1244.00 592.50 282.00 90.00 45.50 0.00 1.50 119.50 340.00 988.50 879.50 5466.00
1937 1592.00 958.50 549.00 376.50 120.50 52.24 a 5.50 30.50 97.00 296.50 592.50 835.00 5505.74
1938 901.00 785.00 580.00 343.50 126.58 a 23.50 0.00 2.00 7.00 330.15 a 719.50 837.50 4655.73
1939 811.00 789.00 556.97 a 253.00 67.50 30.50 0.50 0.50 31.00 326.00 763.00 817.00 4445.97
1940 1019.50 728.00 484.50 300.00 85.50 4.00 0.00 0.00 a 27.00 262.00 900.00 930.00 4740.50
1941 964.50 726.00 473.00 256.50 142.00 18.50 0.00 7.50 117.50 394.00 634.00 823.00 4556.50
1942 1266.50 745.00 571.00 256.50 156.50 32.00 0.00 4.13 a 30.50 272.50 737.50 881.50 4953.63
1943 1204.00 736.00 646.35 a 243.00 193.50 67.50 2.50 3.50 21.00 357.00 746.00 973.00 5193.35
1944 1021.00 775.00 646.50 309.00 118.50 26.50 2.00 2.00 49.00 257.00 731.50 1027.50 4965.50
1945 856.00 637.50 615.50 383.00 111.50 41.00 0.00 7.50 134.00 295.00 646.00 892.00 4619.00
1946 0.00 z 0.00 z 0.00 z 238.00 f 98.50 41.00 1.00 2.00 125.50 466.00 789.00 866.00 2389.00
1947 1065.50 712.50 508.50 268.00 42.50 15.50 0.00 5.00 63.50 303.00 664.00 871.00 4519.00
1948 975.00 849.06 b 657.00 417.00 215.50 1.55 a 5.54 c 0.50 132.00 471.00 663.00 1075.00 5462.14
1949 1531.00 858.50 582.50 233.28 a 81.00 23.50 0.00 2.50 77.07 a 498.00 569.50 861.50 5318.34
1950 1541.00 893.50 632.50 414.50 194.94 e 54.11 b 0.00 3.00 87.93 a 418.50 692.50 397.50 m 4932.48
1951 905.00 727.00 716.00 353.00 117.50 33.50 0.00 12.50 57.00 377.50 721.00 1075.50 5095.50
1952 1135.50 730.50 591.00 264.50 87.00 32.00 0.00 6.50 55.86 a 270.00 882.00 851.00 4905.86
1953 572.50 615.00 520.00 366.00 182.00 38.50 0.00 0.00 k 58.45 a 318.00 570.00 710.50 3950.95
1954 966.17 a 654.00 690.02 b 397.00 133.50 65.17 a 0.00 m 9.00 95.00 460.50 542.00 898.00 4910.36
1955 982.00 759.50 715.00 468.00 228.37 a 20.50 16.50 f 1.50 l 134.48 a 329.38 c 932.14 b 1015.50 5584.87
1956 977.50 670.50 k 593.00 273.00 102.00 40.50 0.00 n 8.50 82.76 a 407.50 827.00 843.50 4155.26
1957 1387.00 776.00 600.00 313.00 60.00 13.00 0.50 9.76 d 59.50 462.50 740.00 744.00 5165.26
1958 818.00 554.00 633.50 371.00 59.50 2.00 0.00 0.00 j 81.50 366.00 625.86 a 855.50 4366.86
1959 931.03 a 729.00 546.50 307.00 217.00 17.50 1.50 8.00 119.50 365.50 800.50 948.50 4991.53
1960 1310.30 c 765.00 601.00 310.00 180.50 23.00 0.00 18.50 77.50 319.00 606.00 1029.00 5239.80
1961 855.50 479.00 503.00 289.50 115.50 5.00 0.00 0.00 105.00 390.00 827.88 d 871.00 4441.38
1962 975.50 726.00 641.50 237.50 198.00 43.00 10.50 3.50 56.00 369.50 547.50 787.50 4596.00
1963 1125.50 688.00 541.00 375.50 135.00 6.50 0.00 0.00 28.00 234.50 565.00 974.00 4673.00
1964 783.00 679.50 570.83 b 350.00 143.50 30.50 0.00 16.50 88.00 379.50 716.50 1026.00 4783.83
1965 867.50 620.50 662.00 271.50 151.50 13.00 2.00 17.00 103.00 248.00 570.00 908.00 4434.00
1966 848.00 656.00 562.00 282.00 93.00 41.00 9.50 6.00 23.00 344.50 595.00 751.50 4211.50
1967 667.00 550.00 559.00 446.00 138.50 5.00 0.00 0.00 24.00 258.00 664.00 886.50 4198.00
1968 824.00 621.00 479.50 378.50 95.00 15.50 0.00 3.74 b 53.00 419.50 655.50 989.00 4534.24
1969 1296.50 862.00 590.50 342.50 78.00 8.50 0.00 9.00 65.00 458.00 706.50 909.50 5326.00
1970 992.50 666.50 613.00 458.00 143.50 33.00 0.00 0.00 178.00 451.00 716.50 938.50 5190.50
1971 786.50 676.50 665.50 379.00 114.00 56.00 10.00 0.00 151.50 373.50 639.00 929.00 4780.50
1972 943.00 765.00 481.50 401.00 94.50 9.00 2.50 1.00 135.50 410.50 679.50 1083.00 5006.00
1973 1057.00 718.00 494.00 307.50 111.50 35.50 0.50 7.00 72.50 350.50 706.50 782.00 4642.50
1974 1033.00 610.00 552.50 325.50 223.00 13.39 b 1.50 0.00 41.50 433.50 630.00 781.72 a 4645.61
1975 963.00 817.50 646.50 469.00 165.50 50.00 0.00 4.81 b 72.50 334.00 664.00 874.50 5061.31
1976 863.00 714.50 644.00 386.00 0.00 z 56.00 2.58 a 8.02 b 3.50 j 405.00 705.54 b 976.50 4761.14
1977 1188.00 659.00 592.00 280.50 276.42 a 15.50 g 3.50 6.50 136.00 379.50 724.00 860.50 5105.92
1978 998.00 715.50 518.50 359.00 197.50 18.50 0.50 0.00 z 105.00 409.50 927.00 1049.00 5298.00
1979 1499.50 792.00 540.50 0.00 z 116.00 0.00 z 10.50 0.00 19.50 0.00 z 801.50 804.00 4583.50
1980 1173.00 833.50 594.50 265.00 132.00 57.00 0.50 11.00 45.00 362.00 640.50 837.50 4951.50
1981 841.50 696.00 517.00 328.00 183.00 50.50 12.00 0.00 92.00 410.23 a 655.00 924.50 4709.73
1982 1036.00 709.00 612.50 472.50 199.00 49.00 11.00 0.00 73.00 399.50 757.00 909.00 5227.50
1983 779.00 597.50 436.00 348.00 139.50 24.00 4.50 1.00 118.00 378.50 542.00 1223.00 4591.00
1984 938.00 702.50 493.50 362.00 234.00 55.00 0.00 1.00 123.50 468.00 702.50 1129.00 5209.00
1985 1182.00 933.00 620.00 256.00 136.00 25.50 0.00 8.50 154.50 418.50 1070.00 1307.00 6111.00
1986 953.00 718.00 475.00 367.50 219.00 5.50 14.50 0.00 115.50 308.00 597.00 959.00 4732.00
1987 1021.00 665.50 488.00 228.00 80.50 26.00 4.00 0.00 42.00 345.00 573.00 943.50 4416.50
1988 969.50 694.00 549.50 294.00 151.50 72.50 2.50 0.00 94.00 193.00 544.00 954.50 4519.00
1989 793.50 1086.50 626.50 262.50 157.00 2.50 0.00 0.00 30.50 336.00 543.50 919.50 4758.00
1990 708.50 719.50 557.50 212.50 150.00 35.50 3.00 0.00 1.50 383.00 510.50 1167.50 4449.00
1991 1071.00 585.50 644.50 322.50 181.00 67.50 0.00 0.00 26.00 363.50 668.00 801.50 4731.00
1992 792.50 640.50 465.00 276.00 95.50 16.50 5.00 19.50 116.00 315.00 670.50 980.00 4392.00
1993 1253.00 962.50 707.50 347.50 76.50 26.00 3.00 14.50 85.50 290.00 847.50 853.50 5467.00
1994 770.50 787.50 496.00 238.00 95.50 21.00 5.50 0.00 13.50 335.00 698.00 840.00 4300.50
1995 983.50 594.00 588.50 377.00 118.00 44.50 0.00 5.50 19.50 380.00 559.00 899.50 4569.00
1996 982.00 909.00 609.50 302.50 212.00 19.50 0.50 0.00 98.00 351.50 739.50 1008.50 5232.50
1997 938.50 680.50 530.00 382.50 99.00 8.00 0.00 0.00 23.50 336.00 628.50 868.50 4495.00
1998 847.00 623.50 510.00 352.00 140.00 0.00 z 0.00 0.00 18.00 350.00 506.50 876.00 4223.00
1999 718.00 586.00 556.50 382.00 218.00 42.50 5.00 6.00 68.00 368.00 510.00 728.50 4188.50
2000 876.00 718.00 575.00 256.50 110.50 29.00 2.00 0.00 104.00 369.00 848.00 994.00 4882.00
2001 938.00 754.50 536.00 378.00 127.00 0.00 z 0.00 0.00 27.00 329.50 0.00 z 816.50 3906.50
2002 790.50 696.00 653.00 320.50 169.50 30.50 0.00 2.00 50.00 418.00 660.50 766.00 4556.50
2003 750.50 663.50 423.50 304.00 157.50 6.50 0.00 0.00 32.00 0.00 z 731.50 865.50 3934.50
2004 1069.50 770.50 396.50 266.50 94.00 28.50 0.00 0.00 35.00 269.50 672.00 805.50 4407.50
2005 1004.50 722.00 451.00 302.50 80.50 15.00 0.00 0.00 50.00 265.50 691.00 1058.00 4640.00
2006 679.00 739.00 560.50 314.50 148.00 5.50 0.00 1.00 58.50 330.50 617.50 1002.50 4456.50
2007 1024.00 701.00 501.00 329.00 96.50 15.50 0.00 0.00 68.50 357.00 666.00 837.50 4596.00
2008 1035.00 663.50 620.00 440.00 126.50 49.66 a 0.00 0.50 49.00 375.00 599.50 1095.50 5054.16
2009 927.50 782.00 661.50 356.50 147.50 4.50 0.00 0.00 28.00 429.50 620.50 1133.00 5090.50
2010 797.50 635.50 520.00 335.50 219.00 32.50 1.50 0.50 26.00 291.00 738.00 907.50 4504.50
2011 864.50 764.50 571.50 453.50 210.50 22.50 0.00 0.00 20.50 274.00 657.00 974.50 4813.00
2012 897.50 725.50 560.00 304.00 141.50 59.00 1.50 1.00 19.50 328.00 603.50 752.00 4393.00
2013 998.50 654.00 534.50 13.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 34.00 z 2187.00
Period of Record Statistics
MEAN 996.43 741.65 569.03 326.94 143.41 29.89 2.19 5.28 77.95 356.74 683.61 934.58 4850.86
S.D. 203.97 127.69 74.34 65.04 48.07 19.19 3.51 7.50 44.27 66.04 110.95 132.99 425.95
SKEW 0.95 1.11 0.07 0.19 0.25 0.65 1.87 2.05 0.56 -0.05 0.76 0.68 0.55
MAX 1613.00 1244.00 777.00 472.50 276.42 98.28 14.50 35.77 215.00 531.00 1070.00 1384.15 6111.00
MIN 572.50 479.00 396.50 165.00 42.50 0.00 0.00 0.00 1.50 193.00 468.00 632.29 3730.47
NO YRS 111 115 112 110 111 108 110 111 111 112 110 112 85