MC MILLIN RSVR, WASHINGTON

Monthly Total Heating Degree Days

(455224)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1941 0.00 z 0.00 z 452.00 362.00 301.00 161.50 29.50 90.50 249.50 401.50 562.50 752.50 3362.50
1942 855.00 688.00 677.00 433.50 355.00 258.50 62.00 48.50 164.50 319.50 653.00 717.13 a 5231.63
1943 987.50 651.00 667.50 410.50 399.00 242.59 a 94.50 74.00 g 149.50 394.22 a 630.50 808.50 5435.30
1944 810.00 725.50 687.50 493.50 374.00 234.00 99.00 114.50 158.00 309.50 644.00 865.50 5515.00
1945 775.00 659.50 691.50 575.50 284.00 247.00 78.50 99.50 266.50 396.50 648.00 801.50 5523.00
1946 775.50 658.50 666.00 515.50 285.00 234.50 93.50 97.00 203.00 526.50 724.50 817.50 5597.00
1947 933.50 609.50 551.50 441.43 b 252.50 188.50 96.00 107.00 187.00 378.50 631.00 720.50 5096.93
1948 852.00 774.50 691.50 570.50 388.00 145.86 a 117.50 116.00 230.00 453.50 688.00 898.00 5925.36
1949 1120.00 792.50 614.00 454.50 274.00 227.00 143.50 103.00 161.00 540.00 459.00 836.00 5724.50
1950 1214.00 719.00 716.50 553.50 426.50 199.50 101.50 77.00 214.00 466.00 652.00 641.00 5980.50
1951 853.50 675.00 790.50 469.50 359.00 176.50 79.50 132.00 171.00 436.50 652.00 889.00 5684.00
1952 911.50 716.00 715.50 488.50 351.00 269.50 105.50 95.00 172.50 342.00 746.00 758.50 5671.50
1953 652.00 662.50 667.50 526.50 375.00 295.00 124.00 a 87.00 174.00 383.00 557.50 729.00 5233.00
1954 908.00 636.50 755.50 574.50 361.00 300.00 203.00 161.00 207.41 a 492.00 518.50 810.00 5927.41
1955 839.00 780.00 832.00 637.00 447.50 252.50 211.00 181.50 265.50 461.50 808.00 843.00 6558.50
1956 849.50 885.00 761.00 489.00 279.50 263.50 104.50 111.50 228.50 476.50 720.50 802.50 5971.50
1957 1056.50 761.50 666.50 472.00 250.00 174.50 157.00 141.00 113.00 460.87 a 704.00 710.00 5666.87
1958 715.50 531.00 686.00 499.50 210.00 114.00 23.50 40.50 189.00 396.50 671.00 660.50 4737.00
1959 788.00 709.50 659.50 483.00 392.50 194.50 85.50 119.00 246.72 a 423.00 672.00 818.00 5591.22
1960 862.00 698.00 691.00 482.00 399.00 209.00 97.00 131.00 250.50 399.50 666.00 834.50 5719.50
1961 704.50 583.00 616.00 536.00 365.00 139.00 70.50 33.00 246.00 471.00 735.00 801.00 5300.00
1962 867.00 650.50 720.50 463.00 453.50 238.50 146.00 93.50 180.50 395.50 590.50 747.00 5546.00
1963 999.00 510.50 675.00 534.50 363.00 231.50 142.00 94.00 118.00 378.50 612.00 794.50 5452.50
1964 774.50 725.50 696.50 588.50 444.50 254.00 122.50 155.00 264.00 441.50 752.00 923.50 6142.00
1965 828.00 676.50 667.00 491.00 441.00 211.50 86.00 85.00 282.50 346.00 558.00 822.50 5495.00
1966 819.50 684.00 670.00 490.00 378.50 228.50 128.50 95.50 151.50 452.50 601.00 671.00 5370.50
1967 745.50 668.00 755.00 617.00 353.50 130.50 61.00 25.50 96.50 391.00 612.50 801.50 5257.50
1968 814.50 608.00 567.00 559.50 354.00 215.00 81.50 139.50 212.50 498.00 634.50 928.50 5612.50
1969 1032.50 743.50 656.00 515.00 296.50 106.50 113.50 131.50 198.50 490.50 630.50 751.50 5666.00
1970 836.50 607.50 653.50 590.50 386.00 153.50 96.00 93.50 278.00 519.50 652.50 870.00 5737.00
1971 833.50 698.50 766.50 561.50 362.00 316.00 125.50 33.00 266.00 515.00 651.50 911.50 6040.50
1972 956.00 753.00 633.50 618.00 326.50 219.50 95.50 84.00 307.00 534.00 658.00 918.50 6103.50
1973 886.50 675.00 649.50 528.50 341.00 238.50 114.00 178.50 202.50 463.00 742.50 724.50 5744.00
1974 917.00 693.00 680.00 537.50 438.00 216.00 135.00 86.00 113.50 433.00 607.50 735.50 5592.00
1975 834.50 725.50 740.00 646.50 382.00 241.00 81.00 146.50 196.00 463.50 681.00 781.50 5919.00
1976 776.00 747.00 774.50 545.00 372.50 302.50 111.50 144.50 178.00 452.50 641.50 769.50 5815.00
1977 968.00 581.00 709.50 454.00 440.00 181.00 134.00 66.50 132.50 j 487.00 707.00 797.50 5525.50
1978 767.00 610.50 593.00 510.50 398.50 140.00 101.50 103.50 254.00 415.50 787.50 961.50 5643.00
1979 1041.50 712.00 586.00 515.50 326.50 188.50 95.50 91.50 157.50 394.00 729.50 693.00 5531.00
1980 993.50 686.50 682.00 431.00 364.00 251.50 102.50 129.50 215.00 443.00 604.50 715.50 5618.50
1981 738.50 658.50 575.00 518.50 379.50 266.00 143.50 67.50 199.50 516.50 600.00 806.50 5469.50
1982 868.00 715.50 708.00 614.50 398.00 157.50 160.00 113.00 218.00 461.00 763.00 837.50 6014.00
1983 739.00 590.00 576.50 515.50 311.00 230.50 146.00 82.00 281.50 525.00 594.00 1021.50 5612.50
1984 758.50 671.00 584.50 549.50 442.50 265.50 110.50 112.50 232.50 539.50 689.50 943.00 5899.00
1985 942.50 778.50 748.00 525.00 372.50 231.50 34.50 103.50 294.00 474.00 938.50 999.00 6441.50
1986 712.00 683.57 e 529.00 543.00 368.50 139.50 165.00 25.50 257.00 409.50 640.00 826.00 5298.57
1987 826.00 601.50 590.00 430.34 a 294.50 a 160.34 a 94.50 82.50 165.50 396.00 558.00 870.50 5069.69
1988 844.50 691.50 646.00 499.50 361.00 231.00 105.00 92.00 232.00 363.00 621.00 799.00 5485.50
1989 807.00 900.50 731.50 429.00 342.00 149.50 117.00 93.00 153.50 460.50 599.00 773.00 5555.50
1990 747.50 770.50 612.50 441.50 361.50 191.50 55.50 56.00 138.50 493.50 610.50 1005.50 5484.50
1991 865.00 547.00 724.50 538.00 392.50 263.50 62.00 59.50 176.50 470.00 604.00 745.50 5448.00
1992 732.50 585.50 553.50 411.00 256.50 114.50 71.00 66.00 218.00 411.00 657.50 863.00 4940.00
1993 953.50 742.50 613.00 493.50 220.00 193.50 166.50 89.50 197.50 390.00 800.00 823.50 5683.00
1994 695.00 765.50 598.50 436.50 298.50 223.00 51.00 47.00 124.50 488.00 754.50 778.00 5260.00
1995 732.50 616.50 641.50 496.00 260.50 180.00 51.50 0.00 z 118.00 449.50 519.50 759.50 4825.00
1996 806.50 725.00 627.00 448.50 440.00 212.50 78.00 64.50 272.00 474.00 702.00 834.00 5684.00
1997 760.00 673.00 639.00 521.00 237.00 182.50 73.00 29.00 127.50 466.00 553.00 780.00 5041.00
1998 739.00 579.00 610.50 503.50 367.00 182.50 39.00 53.50 139.50 431.00 581.50 819.00 5045.00
1999 747.00 668.37 a 686.00 541.00 457.25 a 253.00 137.00 44.00 f 215.69 a 473.50 544.50 759.00 5482.31
2000 841.00 674.50 682.00 476.50 365.50 190.00 92.50 103.50 211.00 454.50 751.00 814.00 5656.00
2001 794.50 744.00 647.00 558.62 a 353.00 251.50 105.83 b 71.00 225.50 482.50 574.50 785.00 5592.95
2002 765.00 694.00 761.00 537.50 394.50 169.50 87.50 98.00 196.00 500.50 588.50 729.50 5521.50
2003 649.50 701.50 582.00 526.00 343.00 154.00 48.00 33.00 149.00 346.50 744.00 773.50 5050.00
2004 831.50 648.00 554.50 424.50 291.00 135.00 48.00 35.00 226.00 406.00 667.50 740.50 5007.50
2005 762.50 708.00 539.50 473.00 261.50 208.50 66.50 41.00 252.50 392.50 707.00 801.50 5214.00
2006 670.00 739.00 674.50 509.50 340.50 154.00 70.00 96.00 175.50 469.50 656.50 0.00 z 4555.00
2007 872.50 637.00 589.53 b 502.50 355.00 208.00 44.50 94.00 220.50 511.00 679.50 797.00 5511.03
2008 870.00 692.50 722.50 630.50 347.00 280.50 96.00 80.50 221.50 496.00 539.50 913.00 5889.50
2009 885.00 732.50 772.50 545.50 0.00 z 122.50 58.50 77.50 171.50 481.50 602.00 951.00 5400.00
2010 626.00 605.00 625.50 534.00 436.50 254.50 125.00 103.50 199.00 441.50 695.00 728.50 5374.00
2011 781.50 772.50 656.00 643.00 457.50 238.00 0.00 z 0.00 z 20.00 z 472.50 703.45 a 868.50 5592.95
2012 832.50 684.50 739.50 545.00 384.00 264.00 97.00 73.50 192.00 450.00 611.38 a 813.23 a 5686.61
2013 2015.00 1275.62 b 1024.11 c 13.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 31.50 z 4314.72
Period of Record Statistics
MEAN 852.28 693.67 667.06 514.26 355.48 209.01 99.29 91.25 201.71 444.97 653.43 811.14 5576.16
S.D. 177.12 99.91 82.58 60.21 60.98 50.27 38.54 36.38 49.37 53.88 79.51 81.25 345.02
SKEW 4.11 2.74 0.87 0.12 -0.37 -0.12 0.46 0.21 -0.04 -0.39 0.54 0.51 0.19
MAX 2015.00 1275.62 1024.11 646.50 457.50 316.00 211.00 181.50 307.00 540.00 938.50 1021.50 6558.50
MIN 626.00 510.50 452.00 362.00 210.00 106.50 23.50 25.50 96.50 309.50 459.00 641.00 4737.00
NO YRS 72 72 73 72 71 72 71 68 70 72 72 71 64