SEDRO WOOLLEY 1 E, WASHINGTON

Monthly Total Heating Degree Days

(457507)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1931 622.00 627.50 571.00 392.50 281.50 192.00 116.00 146.50 178.50 414.00 707.50 774.00 5023.00
1932 872.50 738.50 611.00 434.00 326.00 191.38 a 207.00 113.00 235.00 409.00 535.00 922.50 5594.88
1933 853.00 837.50 630.00 516.00 376.50 277.50 171.50 59.70 d 269.50 426.50 590.00 687.00 5694.70
1934 661.50 491.00 475.00 315.50 253.50 181.00 112.00 82.00 238.50 350.96 c 468.33 c 754.50 4383.80
1935 790.50 543.00 701.52 d 503.50 343.00 160.00 138.00 125.00 185.50 451.00 707.00 688.00 5336.02
1936 749.00 981.50 709.50 407.50 250.50 140.00 119.50 83.00 259.00 367.50 666.50 737.50 5471.00
1937 1186.50 751.50 537.00 522.00 360.50 154.00 108.50 122.50 203.50 327.00 571.00 721.50 5565.50
1938 783.00 626.50 613.00 401.00 309.00 161.00 99.50 142.00 146.50 378.00 695.50 766.00 5121.00
1939 704.50 751.50 649.50 404.50 289.00 227.50 116.00 84.50 222.50 425.50 416.00 556.00 4847.00
1940 723.50 610.00 499.50 361.00 251.50 187.50 128.50 97.50 185.00 368.50 721.50 687.00 4821.00
1941 637.00 521.00 443.00 363.00 298.50 168.00 57.00 74.50 246.00 363.00 540.00 745.00 4456.00
1942 768.50 638.00 584.00 387.50 288.50 209.50 55.00 55.00 196.00 347.50 669.50 737.00 4936.00
1943 928.28 d 590.69 b 655.50 374.50 354.50 214.00 71.50 72.00 136.00 373.50 562.00 823.00 5155.47
1944 725.50 627.00 635.50 416.00 203.00 120.50 19.00 26.50 159.50 271.50 550.00 837.50 4591.50
1945 717.50 580.50 605.50 474.00 208.50 157.50 46.00 58.00 214.50 380.00 666.00 808.00 4916.00
1946 732.00 664.50 595.00 486.50 234.00 126.50 64.00 103.50 173.00 541.00 745.00 833.00 5298.00
1947 941.50 634.50 580.00 394.50 262.00 150.00 92.50 119.00 197.50 398.50 720.50 728.00 5218.50
1948 856.00 792.00 676.50 531.00 345.00 123.00 115.50 107.00 257.00 473.00 702.00 966.00 5944.00
1949 1136.50 810.00 628.50 431.50 307.50 225.50 146.00 109.50 185.00 534.50 359.00 g 862.00 5376.50
1950 1304.00 715.00 679.50 517.50 436.50 133.00 100.50 84.00 228.50 462.50 670.00 618.50 5949.50
1951 857.00 682.00 758.50 466.00 331.00 156.00 70.00 108.00 168.50 432.00 620.00 901.50 5550.50
1952 896.00 680.98 a 681.00 481.00 313.50 266.50 101.00 97.00 161.50 367.00 710.00 734.00 5489.48
1953 641.00 644.50 628.00 453.50 290.00 220.50 85.50 53.50 173.00 377.50 502.00 710.86 b 4779.86
1954 944.50 609.50 715.50 554.00 315.50 262.00 170.00 145.50 180.50 443.50 476.00 734.00 5550.50
1955 821.50 751.50 812.00 554.00 436.00 216.00 175.50 153.50 244.00 443.00 816.50 875.50 6299.00
1956 825.50 867.00 716.50 466.00 265.00 209.50 65.50 81.50 204.00 483.00 700.00 800.00 5683.50
1957 1090.00 777.50 632.50 423.50 222.50 149.50 148.00 111.50 125.00 461.00 672.50 684.50 5498.00
1958 668.50 503.00 610.00 449.50 213.00 60.00 11.00 46.00 190.50 377.50 711.00 654.00 4494.00
1959 793.50 686.00 635.50 460.50 315.50 140.50 71.00 138.50 237.00 439.00 684.00 768.50 5369.50
1960 829.50 688.50 642.00 434.00 329.50 184.50 90.50 132.00 243.50 394.50 638.50 790.00 5397.00
1961 672.00 583.00 557.00 490.50 308.00 114.00 48.50 47.50 250.00 507.50 702.50 802.50 5083.00
1962 838.50 610.50 719.00 438.50 400.00 197.00 129.00 95.50 185.00 400.00 558.50 732.00 5303.50
1963 1010.00 495.70 a 659.50 493.50 311.00 188.50 126.00 76.50 116.00 345.00 628.50 735.00 5185.20
1964 740.00 721.00 680.50 570.50 382.50 209.00 103.00 122.50 269.50 414.00 0.00 z 545.50 k 4212.50
1965 841.13 a 688.00 675.50 470.50 430.50 220.34 a 92.50 88.19 b 278.50 353.50 498.50 777.00 5414.17
1966 788.50 656.00 655.50 495.00 389.50 235.71 b 164.00 111.08 a 164.00 470.17 a 605.00 638.60 a 5373.06
1967 737.00 642.50 714.00 552.50 341.55 c 114.00 106.43 a 34.50 114.83 a 375.00 602.50 812.50 5147.31
1968 810.50 598.50 547.50 540.50 336.87 a 218.28 a 98.88 b 122.50 233.28 a 463.50 590.00 942.50 5502.80
1969 1082.50 715.00 647.00 507.00 276.93 a 93.00 148.80 a 172.57 a 219.31 a 458.50 599.00 704.00 5623.61
1970 826.50 594.00 634.50 561.72 a 383.76 b 159.50 117.00 128.13 a 318.50 524.50 631.03 a 840.00 5719.15
1971 876.50 675.50 743.00 493.00 352.88 a 265.34 a 126.00 41.00 251.50 509.50 626.00 931.00 5891.23
1972 949.50 718.00 622.50 573.50 305.02 c 210.52 a 105.00 80.50 315.50 526.50 621.00 901.50 5929.04
1973 820.50 637.00 628.50 510.50 330.67 a 208.50 111.00 166.22 b 185.50 430.50 726.00 687.17 a 5442.06
1974 891.25 a 671.00 652.00 474.31 a 413.50 186.50 123.00 87.50 105.00 413.00 574.00 669.50 5260.56
1975 825.63 a 726.50 690.78 a 578.00 324.43 b 232.50 82.50 136.50 185.50 444.00 656.50 761.50 5644.35
1976 740.00 0.00 z 733.50 483.00 344.50 266.38 a 108.50 138.00 155.00 431.50 614.00 683.00 4697.38
1977 896.00 537.50 672.00 439.66 a 384.50 171.00 146.50 61.50 246.50 439.17 a 681.50 804.00 5479.82
1978 741.00 574.50 567.00 440.00 349.50 107.50 76.50 78.00 218.00 394.00 763.50 882.50 5192.00
1979 1008.00 744.69 b 558.50 473.50 266.50 182.50 69.50 52.00 111.50 367.00 655.50 650.47 b 5139.66
1980 947.00 642.00 637.00 384.50 313.00 211.00 112.50 123.50 195.00 374.00 538.50 672.50 5150.50
1981 660.00 639.50 512.00 483.50 307.50 231.50 105.00 59.50 188.00 485.50 536.50 760.50 4969.00
1982 872.00 697.00 640.00 529.50 343.50 125.00 0.00 z 102.50 161.50 419.00 732.50 780.00 5402.50
1983 655.50 533.50 494.00 441.50 253.50 170.50 101.50 55.50 252.50 448.50 529.50 946.50 4882.50
1984 726.50 611.00 528.50 472.50 370.00 201.00 104.50 69.50 205.50 481.00 615.50 915.00 5300.50
1985 929.00 736.00 677.00 476.00 313.50 183.00 25.00 89.00 262.00 447.00 963.00 937.00 6037.50
1986 605.00 651.00 484.00 512.50 302.00 125.50 148.50 34.00 214.00 391.50 621.00 721.00 4810.00
1987 758.50 539.00 510.00 389.00 299.50 168.00 83.50 77.00 159.50 397.00 506.00 798.50 4685.50
1988 757.50 653.50 623.00 457.00 320.00 197.00 128.00 89.50 216.00 353.00 593.50 720.50 5108.50
1989 789.00 865.00 662.50 389.50 340.00 129.50 115.50 83.00 154.00 396.50 587.00 729.00 5240.50
1990 722.00 772.00 573.50 401.00 315.00 190.00 47.00 42.50 151.00 442.50 575.00 976.00 5207.50
1991 0.00 z 511.50 672.50 475.50 321.00 236.50 66.50 67.50 163.50 443.50 566.00 684.50 4208.50
1992 647.50 543.00 497.50 361.00 239.50 99.50 69.00 66.00 215.00 371.00 585.50 850.50 4545.00
1993 991.50 675.00 558.00 418.00 173.00 154.50 115.00 83.00 205.00 342.50 756.00 782.50 5254.00
1994 630.50 727.50 539.50 393.50 250.50 185.00 71.00 35.50 120.50 411.00 734.50 732.50 4831.50
1995 708.50 593.00 572.50 438.00 237.00 126.00 0.00 z 0.00 z 0.00 z 407.00 521.50 719.50 4323.00
1996 806.50 678.50 570.00 379.00 385.00 180.50 79.00 58.00 233.50 455.00 671.50 872.00 5368.50
1997 771.50 634.00 608.50 437.50 213.50 150.50 79.50 18.50 109.00 411.00 485.50 717.00 4636.00
1998 0.00 z 519.00 559.50 454.00 320.00 177.50 54.50 62.50 173.50 447.00 598.50 860.00 4226.00
1999 749.50 666.50 643.00 519.50 417.50 232.00 136.50 60.40 b 201.50 509.00 574.00 835.00 5544.40
2000 857.50 667.50 621.55 a 399.00 329.00 163.50 81.78 b 93.00 169.50 388.50 676.00 767.00 5213.83
2001 682.00 675.50 588.00 489.00 326.00 234.83 a 111.00 54.50 176.50 454.00 525.00 755.50 5071.83
2002 741.00 656.50 729.00 499.50 341.00 144.50 85.00 79.88 e 193.00 463.00 545.00 691.00 5168.38
2003 632.00 660.00 563.50 453.00 306.50 107.00 35.50 36.50 155.50 319.50 692.50 718.00 4679.50
2004 754.50 593.00 523.50 350.00 228.00 115.00 31.50 24.50 204.50 383.00 606.00 704.50 4518.00
2005 716.50 636.00 493.00 411.00 186.50 149.50 54.50 27.50 203.50 327.50 667.00 755.00 4627.50
2006 633.00 666.50 593.65 a 449.00 295.53 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2637.68
Period of Record Statistics
MEAN 809.44 659.38 617.68 458.21 311.71 177.77 98.57 86.01 197.97 417.54 626.98 773.79 5229.63
S.D. 138.76 92.39 74.69 59.39 59.27 46.73 38.98 36.54 47.06 55.21 90.78 89.85 418.71
SKEW 1.12 0.64 -0.07 0.00 -0.10 -0.01 0.12 0.27 0.17 0.11 0.50 0.38 0.04
MAX 1304.00 981.50 812.00 578.00 436.50 277.50 207.00 172.57 318.50 541.00 963.00 976.00 6299.00
MIN 605.00 491.00 443.00 315.50 173.00 60.00 11.00 18.50 105.00 271.50 416.00 556.00 4383.80
NO YRS 74 75 76 76 76 75 73 74 74 75 73 74 68