ELTOPIA 8 WSW, WASHINGTON

Monthly Total Heating Degree Days

(452542)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200701
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
1974 0.00 z 0.00 z 629.00 418.50 293.50 57.50 29.50 15.00 70.50 430.00 675.50 853.50 3472.50
1975 1011.00 859.00 712.50 566.50 264.00 109.00 2.50 35.50 86.00 412.00 746.50 936.41 b 5740.91
1976 927.00 781.00 704.22 a 465.00 244.00 140.00 11.00 34.00 53.79 a 450.53 a 726.00 1015.00 5551.54
1977 1226.00 666.50 652.00 322.00 316.00 31.00 35.28 b 28.00 201.00 424.00 770.50 927.50 5599.78
1978 1026.50 738.00 559.50 446.50 283.13 a 52.50 8.00 36.00 150.00 456.50 964.00 1098.00 5818.63
1979 1567.50 828.00 575.50 416.50 170.50 64.50 21.00 0.00 42.00 311.00 889.50 864.50 5750.50
1980 1236.50 843.00 661.50 333.50 193.50 110.00 17.00 43.50 67.76 a 425.00 700.00 858.00 5489.26
1981 854.00 726.00 561.50 419.00 238.00 113.50 32.00 2.50 129.00 446.00 679.04 d 995.50 5196.04
1982 1095.50 737.50 645.00 524.50 249.00 57.50 41.00 12.50 141.50 463.50 869.50 1006.50 5843.50
1983 819.50 651.00 519.00 453.00 213.00 96.50 45.50 0.50 193.00 405.00 609.50 1288.50 5294.00
1984 997.50 733.50 552.50 479.50 331.50 105.00 7.50 15.50 201.50 520.50 750.50 1200.50 5895.50
1985 1221.00 958.50 682.50 381.00 217.50 74.00 1.00 27.00 236.00 485.50 1201.00 1379.50 6864.50
1986 1009.50 754.00 550.50 463.50 244.00 24.50 43.50 0.00 193.50 372.50 693.50 1032.50 5381.50
1987 1098.00 724.00 567.00 0.00 z 156.00 66.11 c 20.00 13.50 78.00 402.50 685.50 1051.50 4862.11
1988 1058.00 732.00 652.00 354.00 239.00 104.00 19.00 4.50 144.50 239.00 643.00 1049.50 5238.50
1989 870.00 1115.00 665.50 329.50 236.00 35.00 13.00 14.00 87.50 417.00 652.50 1012.50 5447.50
1990 787.50 783.00 600.00 332.50 247.00 77.00 12.00 15.00 24.50 479.00 614.00 1238.00 5209.50
1991 1133.00 609.00 679.00 427.00 280.50 135.00 3.00 6.00 67.00 443.50 745.50 885.50 5414.00
1992 847.50 684.50 512.00 361.50 150.00 33.50 7.00 30.00 167.50 381.50 755.00 1081.00 5011.00
1993 1342.50 1007.50 717.00 439.50 124.50 86.00 38.50 39.00 142.50 381.50 925.50 941.00 6185.00
1994 830.50 820.00 552.50 315.50 166.50 87.00 17.00 1.00 41.50 421.50 787.50 947.00 4987.50
1995 988.00 653.50 652.00 445.50 171.00 92.50 4.00 41.50 69.50 465.50 642.00 991.00 5216.00
1996 1088.50 958.50 662.00 374.00 325.50 86.50 17.00 18.50 165.00 448.50 826.00 1092.50 6062.50
1997 1003.00 728.00 595.00 471.00 165.00 84.50 13.00 0.00 84.00 426.00 711.50 973.50 5254.50
1998 920.50 648.00 589.50 440.50 209.50 38.50 0.00 7.50 47.50 447.00 596.00 990.50 4935.00
1999 826.00 662.50 614.50 473.00 330.50 112.00 28.50 14.00 117.00 433.00 597.00 829.00 5037.00
2000 961.00 755.50 642.50 330.00 212.50 66.00 27.00 22.00 167.00 438.50 933.50 1103.00 5658.50
2001 1006.50 806.00 612.50 473.00 218.50 122.00 9.50 5.00 70.50 422.00 685.00 920.50 5351.00
2002 853.50 732.00 721.00 418.00 266.50 70.00 15.50 12.50 121.00 493.00 742.50 840.50 5286.00
2003 814.50 708.00 486.00 395.00 0.00 z 41.50 1.50 0.00 e 69.50 291.00 819.00 966.00 4592.00
2004 1151.50 802.50 479.50 347.50 193.50 85.50 7.50 5.00 107.50 341.50 752.50 905.50 5179.50
2005 1066.00 764.50 513.50 385.00 155.00 68.00 1.50 3.50 129.50 350.00 789.50 1150.50 5376.50
2006 789.00 0.00 z 649.50 393.00 216.50 44.50 4.50 16.00 102.50 421.50 741.00 1079.50 4457.50
2007 1089.50 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 0.00 z 0.00 z 1089.50
Period of Record Statistics
MEAN 1015.64 773.23 611.14 412.31 228.79 77.90 16.78 15.71 114.21 416.52 755.12 1015.27 5492.25
S.D. 175.26 112.92 68.36 62.39 56.24 31.00 13.46 13.64 55.26 58.81 125.67 130.86 416.38
SKEW 0.99 1.24 -0.22 0.27 0.18 0.11 0.69 0.60 0.38 -1.10 1.49 0.87 1.32
MAX 1567.50 1115.00 721.00 566.50 331.50 140.00 45.50 43.50 236.00 520.50 1201.00 1379.50 6864.50
MIN 787.50 609.00 479.50 315.50 124.50 24.50 0.00 0.00 24.50 239.00 596.00 829.00 4935.00
NO YRS 33 31 33 32 32 33 33 33 33 33 33 33 29