ELECTRON HEADWORKS, WASHINGTON

Monthly Total Heating Degree Days

(452493)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 198005
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 214.00 235.00 221.00 378.50 575.00 829.00 1039.00 3491.50
1949 1212.50 860.00 757.50 583.50 379.50 339.00 225.27 a 209.00 267.00 662.37 a 540.50 974.50 7010.63
1950 1336.50 812.00 823.00 663.00 527.50 314.50 189.00 160.50 330.50 593.00 778.00 740.50 7268.00
1951 1011.50 807.00 914.00 579.50 455.00 253.00 147.50 235.00 268.00 578.50 768.50 1037.00 7054.50
1952 1012.00 824.00 828.00 565.50 423.00 356.50 165.00 170.50 246.50 420.00 853.00 899.00 6763.00
1953 764.50 784.50 811.00 661.00 510.50 412.76 a 197.50 198.00 295.34 a 519.50 676.00 864.00 6694.60
1954 1008.50 737.00 885.00 714.00 468.00 411.00 281.00 290.50 353.50 579.00 641.00 908.00 7276.50
1955 968.00 901.50 969.50 769.00 584.50 326.50 287.00 266.50 354.00 544.50 895.00 943.00 7809.00
1956 935.50 961.50 878.50 588.00 369.00 333.50 148.00 181.00 344.00 617.50 784.50 832.00 6973.00
1957 1135.00 822.00 753.50 574.14 a 363.00 265.00 226.00 251.50 201.21 a 553.50 787.00 832.00 6763.84
1958 772.00 594.00 794.00 612.50 273.00 165.00 48.50 106.00 314.00 480.00 771.50 704.50 5635.00
1959 851.50 777.50 780.50 591.50 501.50 275.00 150.00 249.50 367.00 532.00 760.00 880.00 6716.00
1960 939.50 813.00 763.50 591.50 531.50 297.00 125.03 a 237.00 319.50 509.00 781.50 893.00 6801.03
1961 767.50 682.00 722.00 632.50 461.00 200.50 123.00 80.50 407.50 613.50 860.17 a 921.50 6471.67
1962 942.00 767.00 853.02 a 570.00 560.50 310.00 195.00 200.47 a 282.00 544.00 733.00 850.78 d 6807.76
1963 1081.00 593.50 782.00 652.00 429.00 340.50 239.50 189.00 200.00 510.50 760.00 849.50 6626.50
1964 892.00 840.50 827.00 717.00 511.50 339.50 208.00 243.72 b 378.50 532.00 867.50 1032.00 7389.22
1965 920.50 787.00 788.50 596.00 552.50 297.50 136.00 153.50 391.00 468.00 677.50 958.50 6726.50
1966 920.50 811.00 775.00 609.50 455.50 338.50 227.50 203.00 262.50 591.50 708.50 795.00 6698.00
1967 863.00 774.50 858.00 734.50 459.50 182.50 150.00 66.00 207.00 542.50 778.00 934.00 6549.50
1968 909.00 709.50 693.50 671.50 439.50 269.00 111.00 234.50 315.50 584.50 732.00 997.50 6667.00
1969 1111.50 824.44 a 749.00 618.00 362.00 151.50 175.50 215.50 282.00 625.00 693.50 825.50 6633.44
1970 900.00 687.00 755.50 705.00 435.00 195.00 122.00 147.50 379.50 612.50 776.50 966.00 6681.50
1971 977.02 a 802.00 896.00 636.00 434.50 387.50 170.00 103.50 400.34 a 624.13 a 779.00 983.50 7193.49
1972 1066.50 847.00 734.50 710.00 374.00 288.00 147.50 149.00 437.50 674.00 791.50 1050.00 7269.50
1973 991.50 783.50 789.50 625.00 386.50 274.50 131.00 250.00 301.50 606.50 862.50 829.50 6831.50
1974 1059.00 789.50 788.50 631.00 527.50 245.19 d 192.00 153.50 220.50 578.00 738.00 874.00 6796.69
1975 944.00 819.00 843.00 729.50 474.50 336.50 100.00 242.00 293.50 617.50 811.00 868.00 7078.50
1976 887.00 876.00 881.00 645.00 444.00 351.50 159.00 241.50 258.50 594.00 768.50 891.50 6997.50
1977 1020.00 689.50 840.00 532.50 548.50 225.50 201.00 98.50 381.50 631.00 872.50 894.00 6934.50
1978 839.50 687.50 686.00 639.50 492.00 214.50 144.00 178.00 372.00 541.00 922.00 1087.00 6803.00
1979 1136.00 823.50 704.00 618.00 389.00 278.50 162.50 181.50 245.50 467.00 799.50 755.50 6560.50
1980 1079.00 753.50 752.50 458.00 469.43 c 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3512.43
Period of Record Statistics
MEAN 976.67 782.55 802.39 631.99 456.00 287.15 172.48 190.85 314.23 566.28 774.90 903.43 6854.24
S.D. 128.38 79.70 67.27 65.47 70.69 68.98 52.23 57.25 65.57 58.93 78.15 93.29 368.87
SKEW 0.59 -0.51 0.38 -0.09 -0.33 -0.17 0.19 -0.50 -0.10 -0.46 -0.66 -0.01 -0.45
MAX 1336.50 961.50 969.50 769.00 584.50 412.76 287.00 290.50 437.50 674.00 922.00 1087.00 7809.00
MIN 764.50 593.50 686.00 458.00 273.00 151.50 48.50 66.00 200.00 420.00 540.50 704.50 5635.00
NO YRS 32 32 32 32 32 32 32 32 32 32 32 32 31