MUD MTN DAM, WASHINGTON

Monthly Total Heating Degree Days

(455704)

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
1939 531.00 k 818.50 718.50 485.50 376.50 328.97 a 137.50 100.00 232.50 430.00 482.00 670.50 4780.47
1940 758.50 680.50 596.00 488.00 276.79 c 174.50 111.50 118.50 167.50 377.00 739.00 728.00 5215.79
1941 692.50 562.50 496.00 444.00 389.50 261.50 62.00 139.00 317.00 453.00 576.50 834.93 a 5228.43
1942 808.07 a 708.00 714.00 514.50 427.50 301.00 100.00 97.00 202.00 381.50 691.50 790.50 5735.57
1943 1003.00 623.00 733.00 482.00 480.50 322.00 135.00 170.50 183.50 454.00 576.00 770.00 5932.50
1944 810.00 783.50 778.00 567.00 429.50 296.00 135.00 174.00 199.50 303.50 654.50 795.50 5926.00
1945 774.50 726.00 773.00 683.00 364.00 314.00 105.50 133.00 301.00 410.50 718.50 814.50 6117.50
1946 830.00 729.00 736.50 567.32 b 331.50 319.00 146.50 138.50 243.33 c 609.48 c 732.00 839.00 6222.14
1947 966.50 669.50 604.50 485.50 297.50 289.50 159.00 179.00 225.00 454.50 710.00 750.50 5791.00
1948 855.00 851.00 785.50 665.50 469.13 a 202.50 215.00 201.50 297.50 476.00 775.50 962.50 6756.63
1949 1152.00 833.50 699.50 540.50 352.50 319.00 199.50 149.50 g 206.00 607.00 448.00 896.50 6254.00
1950 1298.00 795.50 805.00 643.00 497.00 279.44 c 127.00 100.50 231.00 540.95 a 707.07 a 691.50 6715.96
1951 928.50 753.00 888.15 a 501.00 423.00 218.50 110.50 146.50 188.28 a 470.00 652.50 916.57 a 6196.49
1952 961.50 785.50 797.00 535.50 407.00 353.00 118.83 a 141.50 174.50 291.50 698.50 781.00 6045.33
1953 680.00 697.50 738.00 596.00 442.00 362.00 150.87 a 129.50 210.50 410.50 591.00 746.00 5753.87
1954 941.50 644.50 784.00 657.41 a 409.00 381.50 263.50 b 252.00 284.00 485.00 515.00 785.00 6402.41
1955 879.50 834.50 949.00 705.50 542.50 330.00 271.00 201.50 d 304.00 474.00 829.50 871.00 7192.00
1956 889.00 902.50 806.00 523.00 336.00 326.50 125.50 159.81 b 252.00 544.00 667.00 781.00 6312.31
1957 1068.00 795.00 727.50 554.50 321.50 229.00 190.50 202.00 112.00 475.50 673.50 737.50 6086.50
1958 698.00 556.00 734.00 559.00 244.00 172.50 41.50 61.50 245.00 377.50 691.50 667.50 5048.00
1959 819.00 802.50 743.50 543.00 468.50 262.00 122.50 171.00 337.00 461.00 657.50 812.50 6200.00
1960 908.00 765.50 749.00 571.50 491.00 256.50 99.00 212.00 280.50 425.00 690.50 788.00 6236.50
1961 640.00 662.00 689.50 621.50 446.50 169.50 93.00 56.00 314.00 521.50 740.00 854.00 5807.50
1962 865.00 681.50 801.00 524.00 565.50 291.50 197.00 165.50 216.50 453.50 609.50 754.00 6124.50
1963 1039.00 520.50 743.00 634.50 417.50 320.50 235.50 161.50 149.00 415.00 658.00 760.50 6054.50
1964 831.00 768.00 776.00 683.50 515.00 337.00 187.50 210.50 321.50 360.50 778.50 975.00 6744.00
1965 815.00 720.00 686.00 557.50 521.00 270.50 117.50 132.50 311.50 354.00 553.50 863.00 5902.00
1966 856.50 721.50 721.00 550.00 427.50 311.50 199.00 147.50 206.00 507.50 622.50 729.00 5999.50
1967 785.00 703.50 799.00 703.50 430.50 165.50 103.50 34.50 122.50 431.50 624.00 859.00 5762.00
1968 833.50 557.00 607.00 633.50 422.50 277.50 113.50 186.50 249.00 506.50 640.00 983.50 6010.00
1969 1082.00 773.50 684.00 582.50 336.00 168.00 155.50 198.50 241.50 529.00 608.50 749.50 6108.50
1970 878.00 578.50 706.50 696.50 439.50 192.50 143.50 151.50 332.00 509.50 637.50 901.00 6166.50
1971 888.00 726.00 849.00 602.00 427.00 399.00 151.00 56.50 293.50 564.00 710.00 945.50 6611.50
1972 988.50 761.50 699.00 669.00 361.00 273.50 116.50 108.00 345.50 555.00 644.50 953.50 6475.50
1973 913.50 662.50 729.00 569.00 391.00 286.50 135.00 230.50 220.50 501.00 790.00 721.00 6149.50
1974 946.50 739.50 741.00 602.00 527.00 231.00 182.50 104.50 124.00 421.00 658.00 768.50 6045.50
1975 890.00 791.00 789.50 735.50 419.50 305.50 116.50 201.50 204.00 512.50 704.00 777.00 6446.50
1976 792.50 769.50 813.50 580.50 406.50 338.00 154.00 208.50 205.00 468.00 588.50 747.50 6072.00
1977 902.00 571.50 782.50 489.00 511.50 232.50 175.50 98.50 310.00 502.50 749.00 810.50 6135.00
1978 767.00 651.00 634.00 585.00 459.00 174.00 138.00 148.00 299.50 399.00 801.50 977.00 6033.00
1979 1022.50 767.50 624.50 579.50 366.00 229.50 127.50 128.00 192.00 424.00 703.50 688.50 5853.00
1980 1040.50 721.00 751.50 501.72 a 452.00 330.50 146.50 186.00 b 256.00 424.00 629.50 726.00 6165.22
1981 626.50 677.50 611.50 562.50 446.50 331.00 199.50 88.50 239.50 550.00 597.22 c 825.00 5755.22
1982 904.68 a 750.50 748.50 661.00 448.00 189.50 197.00 147.00 235.50 469.00 743.50 0.00 z 5494.18
1983 692.00 594.50 608.00 538.00 351.50 288.00 208.00 122.00 323.50 517.50 639.00 1039.00 5921.00
1984 772.00 684.00 646.50 627.50 524.50 346.00 164.00 138.50 312.00 616.00 721.00 945.50 6497.50
1985 862.50 822.00 787.00 559.00 423.50 258.50 45.00 124.50 323.50 521.50 985.00 883.00 6595.00
1986 665.00 728.00 593.00 614.50 426.50 163.50 227.00 48.50 325.00 402.50 699.50 785.50 5678.50
1987 826.50 599.50 634.50 484.50 372.00 215.00 160.00 114.00 190.50 347.00 585.50 872.00 5401.00
1988 822.00 690.50 694.00 529.50 431.00 289.00 150.00 134.50 239.50 400.00 655.00 772.00 5807.00
1989 843.50 915.50 759.50 453.00 402.00 188.50 146.00 135.50 160.50 458.00 634.00 775.00 5871.00
1990 768.50 780.50 621.00 481.00 432.50 264.00 83.00 92.00 153.00 501.50 644.00 1033.00 5854.00
1991 866.00 531.00 762.00 588.50 462.00 337.50 108.50 75.50 182.00 450.50 639.50 751.23 a 5754.23
1992 665.50 544.50 542.00 453.50 288.50 171.00 122.50 100.00 244.50 439.50 687.00 888.00 5146.50
1993 953.50 711.50 616.00 555.00 275.50 252.50 223.50 133.50 183.00 367.00 798.50 770.00 5839.50
1994 691.00 766.50 588.00 486.00 324.50 264.50 78.00 72.50 123.00 468.00 793.00 805.50 5460.50
1995 680.00 651.00 626.00 538.00 306.00 233.50 92.50 179.50 118.50 527.50 532.50 757.50 5242.50
1996 848.00 689.00 658.00 493.50 522.00 270.00 104.50 106.50 305.00 460.00 710.50 830.50 5997.50
1997 798.00 672.50 683.00 578.50 288.00 267.50 131.50 59.50 162.50 486.50 529.00 733.50 5390.00
1998 765.50 611.50 651.50 549.50 430.00 252.00 73.50 93.50 126.50 429.00 639.00 874.00 5495.50
1999 822.00 791.00 781.00 597.50 551.00 357.50 204.50 155.00 b 282.50 529.50 620.69 a 890.45 b 6582.64
2000 1019.38 a 846.50 913.50 0.00 z 536.00 350.00 265.50 229.00 358.50 593.50 873.00 925.00 6909.88
2001 873.00 853.50 784.50 733.00 527.50 431.50 275.50 220.00 348.00 617.50 736.00 1005.00 7405.00
2002 1030.00 911.50 1041.00 795.50 665.50 405.50 218.00 146.50 235.00 567.50 597.00 787.50 7400.50
2003 690.00 767.00 698.50 639.50 462.50 224.50 82.50 71.50 189.00 402.50 925.86 a 936.50 6089.86
2004 950.50 831.50 774.50 591.50 434.50 284.00 153.00 142.00 408.50 577.00 839.00 913.50 6899.50
2005 904.50 790.00 712.00 714.00 477.00 433.50 229.00 175.00 431.50 572.00 810.50 895.50 7144.50
2006 810.00 758.50 715.00 534.00 359.00 162.50 80.50 111.00 160.50 457.50 634.00 762.00 5544.50
2007 867.00 675.50 709.50 642.50 474.00 266.50 53.00 109.00 256.00 492.00 659.00 841.00 6045.00
2008 893.50 732.50 800.00 717.50 461.00 388.50 167.50 188.00 295.00 597.00 620.50 1096.00 6957.00
2009 1023.50 741.00 824.00 609.50 0.00 z 0.00 z 0.00 z 106.00 77.00 320.50 459.50 990.00 5151.00
2010 813.00 612.50 648.50 604.50 508.00 337.00 155.50 148.50 251.50 476.50 761.50 806.00 a 6123.00
2011 852.50 859.00 764.00 745.50 578.50 333.00 217.50 87.50 125.50 460.00 745.50 897.50 6666.00
2012 839.00 716.50 788.50 542.50 428.00 333.50 165.50 129.50 231.00 442.50 614.50 813.00 6044.00
2013 947.50 757.50 718.00 25.50 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 2423.00
Period of Record Statistics
MEAN 863.29 723.04 726.46 584.01 427.88 280.71 149.28 138.73 239.24 470.10 676.44 833.87 6092.59
S.D. 124.33 92.48 90.92 79.00 80.79 68.29 54.81 48.73 74.39 74.90 98.49 95.08 511.53
SKEW 0.57 -0.23 0.37 0.46 0.05 0.00 0.34 0.09 0.12 -0.05 0.37 0.56 0.45
MAX 1298.00 915.50 1041.00 795.50 665.50 433.50 275.50 252.00 431.50 617.50 985.00 1096.00 7405.00
MIN 626.50 520.50 496.00 444.00 244.00 162.50 41.50 34.50 77.00 291.50 448.00 667.50 5048.00
NO YRS 74 75 75 73 73 73 73 73 74 74 74 73 69