RICHLAND, WASHINGTON

Monthly Total Heating Degree Days

(457015)

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
1944 0.00 z 0.00 z 0.00 z 0.00 z 45.00 r 31.00 1.00 0.00 56.00 252.50 742.50 b 754.50 j 1083.00
1945 843.00 653.50 609.00 345.50 66.50 12.41 a 0.00 0.50 83.00 237.00 636.50 911.50 4398.41
1946 858.18 a 642.00 492.00 274.00 23.00 18.00 0.00 0.00 h 63.00 377.17 a 714.50 823.50 4285.35
1947 1015.00 667.00 427.00 233.50 17.00 17.00 0.00 1.00 26.00 270.00 614.00 876.00 4163.50
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 5.50 0.00 42.60 e 271.00 l 651.00 1066.00 1765.10
1949 1531.50 884.00 603.50 264.50 78.50 40.50 0.00 0.00 a 51.00 449.00 560.69 a 847.50 5310.69
1950 1523.50 929.00 662.50 419.50 184.50 48.50 0.00 0.00 57.00 378.50 681.72 a 773.00 5657.72
1951 909.33 a 761.00 724.00 298.00 114.50 39.50 0.00 a 14.00 31.50 307.00 696.00 1030.00 4924.83
1952 1122.50 708.00 553.00 242.50 79.00 30.00 3.50 0.00 17.50 167.50 840.50 843.50 4607.50
1953 561.50 577.50 473.50 331.50 150.50 48.50 0.00 0.00 33.50 231.00 534.50 683.50 3625.50
1954 966.50 639.00 643.50 337.50 116.00 58.50 3.00 6.00 70.50 411.00 495.00 848.50 4595.00
1955 935.50 722.00 685.00 443.00 189.50 10.50 13.00 0.00 84.50 264.50 857.50 988.50 5193.50
1956 922.00 1057.50 578.00 234.50 83.00 35.50 0.00 0.52 a 37.00 335.00 764.00 839.00 4886.02
1957 1370.50 757.50 587.00 280.00 48.00 7.00 0.00 0.00 27.50 383.50 652.50 680.50 4794.00
1958 757.00 486.00 590.00 328.00 44.50 0.50 0.00 0.00 41.50 287.00 588.00 818.00 3940.50
1959 885.50 719.00 528.50 289.50 192.50 24.50 4.00 5.50 77.00 299.50 739.00 876.00 4640.50
1960 1217.00 713.00 567.50 319.00 189.00 21.50 0.00 19.00 49.00 269.00 592.00 1013.00 4969.00
1961 859.00 479.00 489.00 300.50 126.50 9.00 0.00 0.00 88.00 350.00 798.10 a 845.00 4344.10
1962 955.50 700.50 629.00 246.50 175.50 36.00 5.50 1.00 42.00 312.50 531.50 757.00 4392.50
1963 1089.50 662.00 521.50 350.00 123.00 12.50 2.00 0.00 23.50 219.50 532.00 980.00 4515.50
1964 783.50 696.00 615.50 378.50 181.00 19.50 0.00 13.00 63.50 333.50 696.50 1055.50 4836.00
1965 884.50 589.00 661.50 271.00 164.50 9.50 2.00 13.50 85.50 207.00 523.00 862.00 4273.00
1966 819.50 632.50 545.00 275.00 116.50 47.50 13.50 3.50 20.00 317.50 549.50 736.50 4076.50
1967 642.00 531.50 557.50 439.50 148.00 11.00 0.00 0.00 20.00 247.00 618.50 868.00 4083.00
1968 809.00 606.50 463.50 384.00 105.50 25.00 0.00 10.50 50.00 374.00 627.00 948.50 4403.50
1969 1281.00 851.00 574.00 331.50 75.50 4.00 0.00 17.00 66.00 476.00 688.50 909.00 5273.50
1970 997.50 668.00 627.00 470.00 160.00 26.50 3.00 0.00 165.00 457.00 727.00 970.50 5271.50
1971 821.50 695.00 718.00 398.00 125.50 81.50 20.50 1.00 169.00 409.50 668.50 946.00 5054.00
1972 955.00 802.50 531.50 440.50 132.00 20.50 4.00 2.00 154.50 404.50 697.50 1062.50 5207.00
1973 1053.00 733.50 542.50 348.00 147.00 51.00 3.50 27.00 74.00 340.50 692.00 749.50 4761.50
1974 1062.00 595.00 558.50 335.50 191.50 24.00 6.50 0.00 36.00 354.50 603.50 774.00 4541.00
1975 906.00 832.00 643.50 479.00 174.50 36.00 0.00 5.00 52.00 322.50 682.76 a 872.00 5005.26
1976 890.50 730.00 652.50 400.00 140.00 68.00 2.50 4.50 23.00 370.00 687.00 1001.50 4969.50
1977 1172.50 626.00 541.50 235.86 a 188.50 14.50 2.50 3.50 108.00 365.50 666.50 835.00 4759.86
1978 955.50 676.50 479.00 334.00 173.50 13.50 0.00 a 3.00 62.50 382.00 900.00 1030.00 5009.50
1979 1542.00 806.00 529.50 365.00 93.50 25.50 8.50 0.00 10.50 227.50 815.50 797.00 5220.50
1980 1175.50 836.50 574.00 275.50 116.00 45.50 2.50 9.50 0.00 z 354.00 637.50 822.00 4848.50
1981 806.00 675.00 482.50 338.50 150.50 40.00 10.00 0.00 86.00 390.00 624.50 924.00 4527.00
1982 997.00 697.93 a 566.50 412.50 168.00 41.50 13.50 0.00 111.00 412.50 788.50 911.00 5119.93
1983 777.00 613.00 455.50 372.50 149.50 21.00 11.00 0.00 152.50 406.50 568.50 1244.50 4771.50
1984 977.00 709.50 509.50 422.00 262.00 81.00 0.00 2.00 143.28 a 437.00 685.34 a 1115.47 b 5344.09
1985 1159.00 882.50 591.50 252.93 a 110.50 5.00 0.00 2.50 131.50 332.50 1040.00 1281.50 5789.43
1986 910.00 666.50 435.50 377.07 a 205.00 4.00 11.37 a 0.00 124.00 314.50 616.00 1000.02 b 4663.95
1987 1023.50 669.00 493.00 249.00 88.50 30.50 0.00 r 0.50 49.50 366.00 623.50 1014.50 4607.50
1988 988.00 700.00 583.00 314.50 169.00 78.00 7.50 0.00 115.50 232.00 588.00 995.00 4770.50
1989 814.50 1080.00 640.50 264.00 178.00 17.00 2.00 1.50 50.50 365.50 598.00 975.00 4986.50
1990 747.50 762.50 573.00 257.00 193.50 51.00 4.50 1.00 3.00 400.50 548.50 1208.50 4750.50
1991 1129.00 609.00 664.50 364.50 212.00 97.50 0.00 0.00 39.00 390.50 705.50 828.50 5040.00
1992 843.50 682.00 489.50 317.50 116.00 20.50 6.50 9.50 134.50 360.00 715.00 1045.50 4740.00
1993 1279.50 960.00 740.00 378.50 78.00 31.00 8.00 16.00 105.50 333.00 877.50 888.50 5695.50
1994 0.00 z 805.50 509.50 265.50 121.50 43.00 0.00 0.00 z 0.00 z 356.00 748.00 860.00 3709.00
1995 971.00 602.00 0.00 z 0.00 z 105.50 0.00 z 0.00 0.00 z 0.00 z 0.00 z 600.50 939.50 3218.50
1996 1017.50 953.50 641.00 326.50 266.00 43.50 3.50 3.00 106.50 375.50 776.50 1052.00 5565.00
1997 963.00 705.50 568.50 417.50 127.00 42.50 3.00 0.00 56.00 372.50 663.50 930.00 4849.00
1998 899.00 642.00 557.00 389.50 156.00 7.00 0.00 0.00 19.00 405.50 0.00 z 934.50 4009.50
1999 788.50 626.50 601.50 426.50 259.50 77.50 16.00 7.50 95.00 399.00 556.00 787.00 4640.50
2000 926.50 759.50 612.50 298.50 147.00 46.00 7.50 2.50 107.00 418.00 880.00 1048.00 5253.00
2001 976.50 784.50 596.23 a 414.00 140.50 72.50 3.00 3.00 0.00 z 357.00 668.50 883.50 4899.23
2002 814.00 729.50 662.50 348.00 212.50 40.00 3.00 2.00 74.50 439.50 703.00 812.00 4840.50
2003 791.50 694.00 459.00 351.50 184.00 20.50 0.00 0.00 52.50 252.00 775.50 929.00 4509.50
2004 1072.50 793.50 448.50 306.50 137.50 46.00 0.00 1.50 61.50 312.00 720.00 862.00 4761.50
2005 1040.50 748.50 535.50 337.50 109.50 33.00 0.00 0.00 67.00 308.50 741.00 1090.00 5011.00
2006 753.00 776.00 594.00 377.00 178.50 13.50 0.00 6.50 77.50 397.50 684.00 1042.50 4900.00
2007 1081.00 717.00 519.50 382.50 136.50 42.50 0.00 3.00 87.00 394.50 725.00 910.00 4998.50
2008 1069.00 0.00 z 645.50 486.00 139.50 70.00 0.00 8.50 55.00 404.00 659.00 1161.00 4697.50
2009 992.50 810.00 692.00 396.00 176.00 11.50 0.00 1.00 44.00 456.50 677.00 1198.50 5455.00
2010 805.00 639.50 561.50 363.00 277.00 59.50 2.00 10.50 54.00 346.00 797.50 947.00 4862.50
2011 905.50 780.00 619.50 507.00 271.00 50.17 a 2.00 0.00 34.14 a 326.50 740.50 1014.00 5250.31
2012 948.00 757.50 592.00 341.38 a 195.50 83.00 2.00 0.50 33.00 376.00 647.59 a 842.00 4818.47
2013 1027.00 694.30 a 564.00 7.00 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 2285.30
Period of Record Statistics
MEAN 975.61 722.25 572.87 344.75 147.09 34.46 3.28 3.68 68.16 345.98 683.00 932.56 4840.98
S.D. 192.26 115.56 72.97 67.97 56.59 23.18 4.57 5.64 39.98 68.00 102.20 128.90 432.87
SKEW 1.02 0.80 0.09 0.26 0.11 0.69 1.71 1.99 0.78 -0.50 0.74 0.51 -0.23
MAX 1542.00 1080.00 740.00 507.00 277.00 97.50 20.50 27.00 169.00 476.00 1040.00 1281.50 5789.43
MIN 561.50 479.00 427.00 233.50 17.00 0.00 0.00 0.00 3.00 167.50 495.00 680.50 3625.50
NO YRS 67 67 67 66 67 68 68 66 65 67 68 68 59