MC NARY DAM, WASHINGTON

Monthly Total Heating Degree Days

(455231)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200810
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
1954 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 330.00 f 526.00 910.50 1436.50
1955 900.50 738.50 736.50 462.50 218.50 30.50 16.50 1.00 87.50 286.50 839.00 936.00 5253.50
1956 907.50 1048.00 601.00 270.50 123.00 54.00 0.00 8.00 59.50 326.00 760.50 846.00 5004.00
1957 1392.50 763.00 602.00 306.00 60.50 11.00 0.00 0.00 33.50 376.00 666.00 707.50 4918.00
1958 772.50 507.50 605.00 373.00 77.00 8.00 0.00 0.00 56.00 293.50 615.50 820.00 4128.00
1959 876.00 676.50 553.50 326.50 219.00 20.00 0.00 4.00 83.00 310.00 790.00 923.00 4781.50
1960 1196.00 736.00 617.50 333.50 208.00 15.50 0.00 20.00 41.50 307.50 621.00 1011.50 5108.00
1961 874.50 541.50 517.50 357.50 171.00 15.00 0.00 0.00 96.00 383.00 807.00 870.00 4633.00
1962 1021.00 737.50 686.00 296.38 a 273.50 61.00 15.00 11.00 84.00 358.00 587.50 797.00 4927.88
1963 1143.00 745.00 590.00 430.00 163.50 45.00 8.02 b 2.50 37.50 b 257.00 575.00 983.50 4980.02
1964 767.50 692.00 644.00 389.50 202.50 35.50 0.00 11.50 69.50 368.50 697.50 999.00 4877.00
1965 865.00 618.00 660.50 266.00 156.00 27.00 2.50 10.00 102.00 242.00 554.00 872.50 4375.50
1966 846.50 688.50 591.50 298.45 a 127.50 59.50 17.50 0.00 23.00 322.00 578.50 729.50 4282.45
1967 659.00 598.50 592.50 461.00 132.00 4.50 0.00 0.00 18.00 279.50 630.50 884.00 4259.50
1968 875.50 659.50 496.00 395.50 126.00 21.50 0.00 6.00 49.50 376.00 630.50 952.50 4588.50
1969 1254.98 a 822.50 611.50 372.50 91.50 10.50 0.00 4.00 41.00 398.50 600.00 836.00 5042.98
1970 962.00 660.50 602.50 485.00 170.50 27.50 2.00 0.00 153.00 401.50 654.00 886.00 5004.50
1971 757.50 661.00 687.50 403.50 126.50 68.00 11.00 1.50 121.00 382.50 634.50 816.50 4671.00
1972 941.00 812.00 547.50 477.00 144.00 20.00 0.00 1.00 124.00 357.50 622.50 1126.00 5172.50
1973 1058.50 760.00 538.00 352.00 134.85 a 52.50 2.00 3.50 68.00 321.00 658.00 728.50 4676.85
1974 1075.00 630.50 586.00 382.50 216.50 42.50 6.72 a 0.00 33.00 346.00 619.00 734.50 4672.22
1975 888.50 800.50 673.00 519.50 209.77 a 78.50 0.00 9.50 56.00 344.00 714.50 795.00 5088.77
1976 846.50 767.50 705.00 433.50 163.00 86.50 5.00 15.00 23.50 371.50 646.00 935.50 4998.50
1977 1153.50 659.50 609.00 294.00 252.00 16.50 3.50 6.00 118.00 357.50 700.50 830.00 5000.00
1978 965.50 699.00 545.00 380.50 135.50 p 8.00 j 2.50 7.00 69.00 307.00 843.10 a 940.00 4758.60
1979 1428.50 798.50 553.00 332.00 114.00 23.50 2.50 0.00 17.00 254.00 787.00 836.50 5146.50
1980 1174.50 846.50 610.50 301.50 168.00 53.89 c 0.50 1.50 i 46.00 q 386.50 624.31 a 808.21 c 4974.41
1981 105.00 z 0.00 z 174.00 t 309.00 g 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
1982 79.50 z 745.50 614.00 149.00 t 140.50 j 7.50 x 5.50 1.00 88.50 397.00 752.50 861.00 3465.00
1983 765.00 606.00 464.00 382.50 154.00 25.00 3.00 0.00 107.50 336.50 513.00 1210.50 4567.00
1984 974.00 720.50 528.00 400.50 248.50 76.00 0.00 0.00 115.00 405.00 648.00 1021.00 5136.50
1985 1096.00 919.00 635.00 259.62 d 139.00 25.00 0.00 1.50 134.00 331.00 1014.50 1286.50 5841.12
1986 934.50 724.50 495.50 402.00 223.20 a 16.50 7.00 0.00 118.50 296.00 614.00 937.50 4769.20
1987 978.50 670.50 539.50 274.00 115.00 37.00 1.55 a 0.00 47.00 314.00 578.50 922.00 4477.55
1988 944.50 708.50 586.50 337.00 193.50 88.00 8.00 0.00 84.50 180.50 538.00 879.00 4548.00
1989 793.00 1082.00 652.50 296.50 183.00 23.50 2.00 0.00 26.00 316.50 547.00 931.50 4853.50
1990 745.00 740.00 580.00 261.00 186.50 58.00 4.50 0.00 1.50 363.00 540.50 1163.00 4643.00
1991 1050.00 628.50 660.50 366.00 217.00 85.00 0.00 0.00 21.50 338.50 654.00 794.00 4815.00
1992 804.00 654.50 498.50 303.50 117.50 16.50 6.50 17.00 119.50 304.50 657.50 948.00 4447.50
1993 1247.50 965.00 753.50 376.50 104.50 59.00 4.00 13.50 93.50 291.50 869.50 852.00 5630.00
1994 776.00 809.50 571.00 274.50 118.50 53.00 6.00 0.00 8.50 345.50 707.00 853.00 4522.50
1995 988.00 645.50 597.50 408.00 141.00 61.00 0.00 10.50 25.00 373.50 551.00 882.00 4683.00
1996 923.00 925.50 638.50 360.50 271.50 41.50 4.00 0.00 107.00 349.50 721.50 951.00 5293.50
1997 959.50 719.50 580.00 412.50 137.50 31.00 5.50 0.00 48.50 353.00 624.50 861.00 4732.50
1998 872.50 620.00 552.50 402.50 190.00 13.50 0.00 0.00 25.00 368.50 523.50 865.50 4433.50
1999 755.00 611.50 594.00 433.00 260.50 70.50 15.50 8.50 79.00 364.00 528.00 769.00 4488.50
2000 874.50 740.50 597.27 a 305.50 157.50 32.59 a 5.17 a 1.00 106.50 364.00 819.00 986.50 4990.02
2001 926.00 770.50 571.00 420.50 164.00 67.50 1.50 0.00 26.00 338.50 630.00 819.50 4735.00
2002 815.00 698.00 689.00 363.50 213.50 43.00 0.00 6.00 46.00 397.00 690.50 775.50 4737.00
2003 755.00 677.50 479.00 359.00 0.00 z 18.00 0.00 0.00 37.00 223.50 738.00 866.00 4153.00
2004 1097.50 761.25 e 467.00 305.50 139.00 46.00 0.00 0.00 50.00 257.50 649.50 831.00 4604.25
2005 970.50 761.00 485.50 350.50 109.50 43.00 0.00 z 0.00 z 48.00 0.00 z 689.50 1060.00 4517.50
2006 726.50 0.00 z 581.50 363.50 0.00 z 14.00 0.00 0.00 z 81.00 351.00 659.50 973.50 3750.50
2007 1029.00 733.50 525.00 381.50 158.50 37.50 0.00 3.00 77.00 378.50 676.00 836.50 4836.00
2008 994.50 698.50 660.00 507.50 178.00 82.00 0.00 4.00 75.50 375.00 0.00 z 0.00 z 3575.00
Period of Record Statistics
MEAN 949.95 730.86 591.67 365.52 166.72 40.23 3.36 3.75 66.56 335.12 662.57 899.08 4812.50
S.D. 168.23 111.30 67.08 65.41 50.65 23.54 4.64 5.20 37.41 49.27 101.78 117.50 338.41
SKEW 0.83 1.07 0.17 0.32 0.27 0.45 1.65 1.39 0.28 -0.94 1.02 1.15 0.61
MAX 1428.50 1082.00 753.50 519.50 273.50 88.00 17.50 20.00 153.00 405.00 1014.50 1286.50 5841.12
MIN 659.00 507.50 464.00 259.62 60.50 4.50 0.00 0.00 1.50 180.50 513.00 707.50 4128.00
NO YRS 52 52 53 52 49 51 52 50 52 52 53 53 46