SNOQUALMIE FALLS, WASHINGTON

Monthly Total Heating Degree Days

(457773)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201007
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
1898 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
1899 373.00 n 707.54 b 662.00 473.00 398.50 204.00 35.00 48.50 72.50 297.50 0.00 z 0.00 z 2898.54
1900 559.50 534.00 406.50 247.00 157.00 61.03 a 6.20 a 9.00 100.50 299.00 487.00 0.00 z 2866.73
1901 0.00 z 0.00 z 0.00 z 506.40 e 301.98 b 322.50 231.50 127.50 397.50 444.00 527.50 753.50 3612.38
1902 700.00 581.50 666.00 536.00 316.00 167.50 84.00 80.50 250.50 384.50 636.72 a 755.50 5158.72
1903 792.00 30.50 z 698.02 a 573.10 a 318.50 77.00 0.00 z 53.00 223.97 a 0.00 z 161.50 u 764.15 a 3499.74
1904 781.00 780.00 703.00 430.00 356.50 202.50 62.00 86.50 197.50 376.00 487.50 737.00 5199.50
1905 843.00 686.50 509.00 468.00 326.00 123.00 35.28 b 70.78 a 175.18 b 607.37 d 675.00 775.60 e 5294.70
1906 804.97 a 625.50 648.50 360.50 341.00 202.50 3.50 61.50 176.00 406.00 677.78 c 780.68 a 5088.43
1907 1108.00 674.69 b 752.00 532.76 a 240.00 172.00 38.00 103.13 e 191.00 389.50 591.50 728.50 5521.09
1908 798.00 754.50 697.00 483.00 394.50 198.50 23.50 88.50 256.50 494.00 566.00 909.00 5663.00
1909 1035.00 708.00 670.00 535.00 372.00 129.50 73.50 110.50 196.00 481.50 642.00 987.50 5940.50
1910 891.50 825.00 560.00 457.50 201.00 158.50 38.00 140.50 230.50 426.50 657.50 748.00 5334.50
1911 911.00 776.00 614.50 543.00 339.00 185.50 44.00 59.50 270.50 505.00 677.00 787.50 5712.50
1912 796.50 627.00 688.50 502.00 235.50 121.50 64.50 86.00 229.50 536.00 610.00 795.50 5292.50
1913 976.00 772.50 756.00 461.50 304.50 81.67 c 89.00 57.50 195.00 514.00 604.50 729.65 d 5541.81
1914 715.50 644.50 542.50 374.50 190.00 141.00 29.00 43.00 h 250.00 320.50 563.00 913.00 4683.50
1915 814.00 565.00 432.50 311.00 266.50 104.00 52.00 18.00 219.00 394.50 703.00 779.50 4659.00
1916 1161.00 714.00 665.50 437.00 344.50 153.00 70.50 58.50 201.50 570.50 679.50 887.50 5943.00
1917 885.00 731.50 754.00 549.31 a 319.00 189.00 32.50 12.50 171.00 418.00 450.52 a 666.50 5178.83
1918 700.00 740.50 632.50 434.50 354.00 49.50 24.50 47.00 105.50 385.00 599.00 773.00 4845.00
1919 781.00 717.50 629.00 414.00 272.50 149.50 26.50 41.00 182.00 524.00 642.50 912.50 5292.00
1920 846.00 784.00 653.50 562.00 338.50 121.00 16.50 45.50 209.50 506.00 617.00 702.50 5402.00
1921 770.00 644.50 625.00 501.50 292.00 119.00 61.00 51.50 252.50 416.50 609.00 822.00 5164.50
1922 973.50 772.50 705.50 498.00 282.50 62.00 50.50 55.00 161.00 396.50 689.00 903.50 5549.50
1923 785.00 830.00 661.50 364.44 c 273.00 148.50 29.50 11.00 162.50 387.50 561.50 749.00 4963.44
1924 814.50 550.50 662.50 440.00 156.50 98.50 40.00 57.00 180.50 410.00 618.00 930.50 4958.50
1925 729.00 601.00 600.50 429.00 242.00 188.50 36.50 104.50 193.50 530.50 673.00 631.00 4959.00
1926 792.00 582.00 519.00 306.00 291.00 117.50 51.00 73.00 286.50 387.00 567.50 830.50 4803.00
1927 827.00 676.50 705.50 553.00 433.00 147.00 75.00 65.50 223.50 432.00 625.50 948.50 5712.00
1928 768.50 713.50 549.00 499.50 257.50 200.50 72.50 85.00 276.00 463.50 663.50 866.00 5415.00
1929 1080.00 946.00 672.50 571.50 343.50 196.00 80.60 a 71.50 242.00 375.50 710.36 b 747.50 6036.96
1930 1106.00 623.00 618.00 388.45 a 384.00 242.00 104.00 63.50 216.50 498.00 688.50 735.00 5666.95
1931 658.50 631.00 592.50 437.00 242.50 173.50 73.00 105.50 216.00 435.07 b 750.00 809.50 5124.07
1932 894.50 805.00 603.50 453.00 365.50 173.00 150.00 94.50 222.50 433.00 564.00 875.50 5634.00
1933 875.50 854.50 684.50 510.00 428.00 246.50 139.00 61.50 282.50 441.50 650.00 700.50 5874.00
1934 693.00 535.50 491.00 325.50 266.50 190.50 133.00 90.50 307.50 428.00 532.00 780.00 4773.00
1935 843.00 621.50 640.00 f 580.50 422.00 241.00 160.00 161.00 221.50 0.00 z 170.50 v 728.00 3978.50
1936 742.50 980.00 741.50 411.00 259.00 147.50 80.00 55.00 272.50 405.50 722.50 774.00 5591.00
1937 1177.50 677.00 0.00 z 144.00 u 335.00 147.50 73.50 111.50 191.50 377.00 599.50 745.50 4435.50
1938 800.50 631.50 669.00 435.50 328.50 159.00 70.00 133.50 132.50 383.00 695.00 750.50 5188.50
1939 723.50 780.50 661.50 418.50 331.00 251.00 101.00 81.00 238.00 464.50 509.00 656.50 5216.00
1940 728.00 627.00 560.50 415.00 235.00 165.00 83.50 81.00 150.00 341.50 723.00 708.00 4817.50
1941 678.90 a 582.50 473.78 a 408.50 326.50 198.50 48.50 97.00 295.50 427.00 606.50 765.00 4908.18
1942 770.50 675.50 622.00 405.50 321.00 220.00 36.00 51.00 194.50 390.00 672.00 745.00 5103.00
1943 1006.00 604.00 684.00 396.00 405.50 213.00 57.00 80.50 149.00 434.50 544.50 822.50 5396.50
1944 755.00 744.50 707.00 450.54 b 355.50 190.50 88.50 93.00 163.50 341.50 644.50 772.50 5306.54
1945 734.50 667.50 700.50 579.50 293.00 232.50 58.50 99.00 284.00 445.00 698.00 820.50 5612.50
1946 791.00 673.50 673.50 525.50 253.50 232.00 70.00 83.00 201.50 583.00 733.50 854.50 5674.50
1947 933.00 630.50 591.50 416.50 241.50 200.00 106.00 127.50 252.50 420.50 691.00 733.00 5343.50
1948 862.00 790.00 710.00 580.00 380.50 134.48 a 124.50 118.50 281.00 478.00 741.00 927.50 6127.48
1949 1129.50 787.63 a 657.00 463.00 287.50 256.00 159.50 123.00 208.97 a 565.50 447.00 841.50 5926.10
1950 1262.50 708.50 708.50 563.50 457.50 190.00 102.00 79.00 244.00 496.00 676.50 633.50 6121.50
1951 864.00 711.50 795.00 476.50 337.00 172.50 72.00 158.00 208.00 479.50 661.50 921.50 5857.00
1952 932.00 723.50 720.00 463.00 345.00 276.00 89.00 109.00 187.00 402.50 745.50 780.50 5773.00
1953 642.50 679.50 671.00 527.50 366.00 284.00 110.50 77.00 199.00 420.00 531.50 687.00 5195.50
1954 930.00 640.50 765.50 578.50 361.00 279.00 186.50 155.53 b 247.50 468.50 489.83 a 736.50 5838.86
1955 842.50 780.00 845.50 627.00 461.50 245.50 192.00 157.50 287.00 480.00 820.00 873.17 a 6611.67
1956 820.00 885.54 a 738.00 470.17 a 269.50 249.50 81.50 96.00 236.00 523.50 695.00 774.50 5839.21
1957 1060.00 785.22 e 645.50 466.00 241.50 159.50 125.07 b 145.50 115.00 478.50 676.50 672.50 5570.79
1958 648.50 461.50 658.50 471.00 188.50 83.00 8.50 19.00 202.00 349.50 670.50 607.50 4368.00
1959 768.50 688.00 651.00 477.00 386.00 169.50 83.00 100.00 241.00 428.50 636.50 747.00 5376.00
1960 821.00 675.00 656.00 452.50 388.00 178.00 61.50 127.50 220.50 385.50 637.00 763.50 5366.00
1961 606.50 575.50 584.00 515.00 339.50 120.00 43.50 13.50 243.50 478.50 694.50 818.00 5032.00
1962 825.00 600.50 697.00 414.50 430.00 207.00 122.00 89.50 164.50 404.00 557.00 703.00 5214.00
1963 989.00 472.50 660.50 522.00 322.50 230.50 130.50 84.50 115.00 357.50 614.00 737.50 5236.00
1964 750.50 704.50 654.50 563.50 407.00 216.00 94.50 138.00 278.00 368.50 740.00 907.00 5822.00
1965 801.50 663.50 635.50 444.50 407.00 190.00 57.50 71.00 280.00 353.50 497.00 801.00 5202.00
1966 768.50 640.00 606.00 465.50 348.00 195.50 95.00 64.00 129.50 431.00 602.50 658.50 5004.00
1967 737.50 640.00 720.75 a 616.00 370.00 106.00 62.00 25.00 111.50 368.50 568.50 788.00 5113.75
1968 803.50 542.00 553.00 573.50 339.00 214.50 69.00 141.50 236.00 456.00 607.50 932.50 5468.00
1969 1049.50 700.00 652.50 514.50 301.00 110.00 107.50 137.50 200.50 477.00 577.50 694.00 5521.50
1970 782.50 536.50 641.50 598.50 377.50 156.00 94.00 113.00 284.00 455.00 617.50 870.50 5526.50
1971 805.50 693.00 769.00 543.00 369.00 313.00 127.00 40.00 282.00 499.00 628.50 871.50 5940.50
1972 929.00 702.50 597.00 600.50 315.50 209.50 85.00 72.50 300.50 540.50 608.50 885.50 5846.50
1973 841.00 581.50 658.00 517.00 325.50 234.50 103.50 195.00 204.00 470.00 746.50 697.50 5574.00
1974 881.00 676.50 694.50 527.00 443.00 210.00 151.00 85.00 128.50 449.50 607.50 711.00 5564.50
1975 830.00 700.50 750.50 649.50 374.50 285.00 99.50 175.50 204.00 486.00 661.50 740.00 5956.50
1976 739.50 737.00 760.50 519.50 388.50 309.50 134.50 162.00 204.50 492.00 0.00 z 714.50 5162.00
1977 926.00 519.00 703.00 428.00 423.50 158.50 128.00 67.50 280.00 471.50 676.00 769.50 5550.50
1978 687.00 572.00 558.50 494.00 397.00 125.00 89.00 111.00 244.50 428.00 784.50 937.00 5427.50
1979 943.00 703.50 581.00 509.46 b 312.00 194.00 78.50 69.23 a 145.00 394.00 661.00 661.00 5251.70
1980 979.50 637.00 669.50 408.00 358.50 254.00 99.00 163.50 226.50 408.00 576.50 660.50 5440.50
1981 580.50 620.50 558.50 488.50 369.50 258.00 120.00 65.00 203.00 526.50 578.00 780.00 5148.00
1982 840.50 668.00 680.50 552.50 364.50 145.00 138.00 92.50 0.00 z 440.50 720.00 803.00 5445.00
1983 664.00 530.50 537.00 475.00 301.00 211.50 128.00 71.50 308.00 525.00 577.00 973.00 5301.50
1984 714.50 618.00 561.00 535.00 414.00 249.50 109.50 110.00 284.00 576.50 706.00 928.50 5806.50
1985 859.00 761.50 725.00 508.00 355.50 208.50 22.50 99.50 301.50 504.00 982.00 1010.50 6337.50
1986 618.50 653.50 526.00 551.50 328.50 127.00 144.00 34.50 276.50 395.00 623.50 763.00 5041.50
1987 811.00 536.50 559.03 a 417.50 301.50 150.50 90.50 74.50 166.00 399.50 520.00 879.00 4905.53
1988 782.00 628.50 646.00 475.50 330.50 213.00 96.00 80.00 230.50 354.00 615.50 751.00 5202.50
1989 790.50 890.50 692.00 413.00 346.00 143.00 115.50 74.50 157.50 451.00 576.50 768.00 5418.00
1990 725.50 757.50 610.50 441.50 375.00 194.50 49.00 49.50 144.00 495.00 580.00 959.00 5381.00
1991 862.50 520.00 699.00 527.00 390.50 279.00 67.00 65.50 175.00 454.00 586.00 686.50 5312.00
1992 690.50 535.50 529.50 395.00 249.00 123.50 85.50 61.00 248.00 396.00 628.00 856.50 4798.00
1993 919.50 687.50 591.00 477.50 220.00 202.50 186.50 100.00 201.00 383.00 769.00 813.00 5550.50
1994 687.00 754.00 581.00 454.50 303.50 227.50 70.00 45.50 121.00 448.50 753.50 786.50 5232.50
1995 627.50 632.00 618.00 496.50 275.50 184.00 63.00 148.00 115.50 0.00 z 524.50 714.50 4399.00
1996 0.00 z 693.00 638.50 437.00 435.50 0.00 z 79.00 79.00 259.50 445.00 678.50 835.00 4580.00
1997 789.00 645.50 652.00 503.00 242.00 204.00 92.00 33.00 124.50 443.50 499.50 693.50 4921.50
1998 744.00 552.00 585.50 506.00 340.00 171.00 39.50 59.00 132.00 407.50 577.50 824.00 4938.00
1999 746.50 647.00 672.50 552.00 457.00 261.50 137.00 56.32 a 219.00 480.50 538.50 721.27 a 5489.08
2000 815.50 650.50 661.50 457.00 353.92 a 200.00 115.50 102.82 a 204.00 450.00 730.50 795.00 5536.23
2001 720.00 701.50 642.00 529.50 371.48 a 253.00 109.50 80.50 187.00 492.90 a 552.00 724.37 a 5363.75
2002 768.00 692.00 759.50 558.50 409.00 181.03 a 96.00 89.00 203.00 505.00 564.00 727.00 5552.03
2003 631.50 693.50 610.00 510.50 363.50 153.00 0.00 z 31.50 180.00 357.50 0.00 z 766.14 c 4297.14
2004 801.00 642.50 570.00 398.50 302.50 128.50 20.00 16.00 139.50 343.50 627.00 766.00 4755.00
2005 764.50 692.50 498.30 d 471.50 264.50 219.50 43.50 36.00 219.50 318.00 664.50 778.00 4970.30
2006 677.00 697.00 619.50 471.50 328.50 133.00 47.00 64.50 165.50 453.50 625.50 586.00 g 4282.50
2007 867.50 594.50 574.00 471.50 336.50 187.00 31.50 77.00 210.50 470.00 662.50 807.00 5289.50
2008 858.50 684.00 720.50 630.00 372.50 301.50 90.00 95.00 230.00 501.50 231.00 p 0.00 z 4483.50
2009 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
2010 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
Period of Record Statistics
MEAN 822.10 675.04 643.01 483.07 330.64 185.69 82.96 83.71 211.15 440.07 632.21 787.97 5393.46
S.D. 132.81 94.61 77.55 72.34 65.56 57.79 43.52 39.28 56.44 63.70 83.69 86.46 390.62
SKEW 0.87 0.44 -0.40 -0.32 -0.36 0.04 0.63 0.43 0.07 0.15 0.54 0.46 0.28
MAX 1262.50 980.00 845.50 649.50 461.50 322.50 231.50 195.00 397.50 607.37 982.00 1010.50 6611.67
MIN 559.50 461.50 406.50 247.00 156.50 49.50 3.50 9.00 72.50 297.50 447.00 607.50 4368.00
NO YRS 107 108 107 109 110 109 108 109 109 107 104 106 96