ELWHA RS, WASHINGTON

Monthly Total Heating Degree Days

(452548)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201302
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
1942 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 81.50 61.50 106.50 g 249.50 o 682.50 835.93 b 1661.43
1943 1024.07 b 687.56 a 687.00 423.89 c 411.50 236.38 a 151.26 b 102.00 173.00 270.00 f 601.50 862.50 5360.65
1944 823.64 b 820.50 769.50 641.00 435.66 c 193.97 a 137.00 238.00 256.50 0.00 z 0.00 z 931.50 5247.26
1945 833.50 696.50 741.50 675.00 328.50 269.00 82.00 174.00 258.00 437.50 800.00 921.00 6216.50
1946 857.50 757.50 742.40 b 601.00 327.00 305.00 148.00 106.00 252.50 589.52 a 847.50 b 930.50 6464.41
1947 1029.00 689.77 b 649.93 b 326.00 f 268.15 a 196.55 a 98.50 111.00 170.50 461.38 a 708.00 762.60 a 5145.39
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 153.62 a 116.00 145.18 a 249.50 507.00 734.00 920.46 e 2825.77
1949 1091.00 823.20 c 683.00 547.50 297.50 222.50 168.50 143.00 170.69 a 548.50 541.00 894.50 6130.89
1950 1274.50 810.00 761.50 586.00 454.50 172.50 108.50 96.10 a 198.50 544.50 744.31 a 0.00 z 5750.91
1951 40.00 z 755.50 687.00 f 462.41 a 360.00 140.50 63.50 117.50 186.00 501.50 690.50 948.00 4225.41
1952 961.50 747.50 714.00 527.00 367.00 287.00 118.00 106.50 160.50 361.50 738.00 808.00 5896.50
1953 724.00 687.50 688.50 549.00 357.00 333.50 119.50 91.00 132.50 436.21 c 511.50 f 742.00 4860.71
1954 941.50 713.50 769.50 611.79 b 372.00 341.00 157.58 a 138.00 224.00 510.00 353.00 j 805.48 a 5584.35
1955 820.39 c 766.00 843.00 633.50 477.00 282.41 a 183.50 137.95 a 79.50 q 513.10 b 858.00 e 951.04 c 6465.90
1956 938.00 882.95 a 811.68 a 481.73 d 263.50 329.50 97.13 a 58.26 b 180.00 g 437.00 f 566.50 g 686.00 f 3862.75
1957 1054.50 801.50 d 680.89 c 477.32 b 236.52 d 188.89 c 166.76 b 118.50 95.00 471.20 a 715.50 788.43 a 5795.01
1958 448.50 l 589.08 b 695.00 500.50 203.00 85.20 e 11.37 a 27.00 192.50 456.50 752.50 738.00 4250.64
1959 864.00 730.00 690.50 515.00 304.00 h 240.00 b 88.50 120.00 276.50 460.00 727.50 823.50 5535.50
1960 916.00 732.50 724.00 520.50 435.79 e 206.50 74.00 160.50 234.50 451.00 716.00 826.50 5997.79
1961 780.17 a 630.00 663.00 526.00 365.50 156.72 a 48.50 32.00 247.00 553.50 786.50 894.00 5682.89
1962 858.00 686.00 771.00 504.50 459.00 251.50 163.50 150.00 194.50 470.50 660.00 757.90 b 5926.40
1963 943.50 619.50 717.28 b 557.59 a 366.50 231.72 a 196.50 122.50 148.33 c 369.00 f 695.00 c 637.00 g 4598.42
1964 829.52 b 713.29 c 695.78 d 450.00 f 427.80 a 203.50 f 157.50 161.50 192.00 i 321.50 k 799.62 d 541.00 n 3785.00
1965 596.00 k 497.50 g 668.80 d 522.41 a 437.74 b 206.00 94.00 98.00 148.00 l 429.83 e 354.00 m 590.50 h 2456.78
1966 363.50 r 702.92 d 734.38 b 535.00 c 374.07 a 277.00 140.50 87.00 166.80 e 496.55 c 495.50 h 749.37 e 4263.58
1967 804.34 c 657.50 763.78 b 620.89 b 248.00 j 113.04 b 94.00 35.50 122.50 449.50 653.50 599.50 h 4314.54
1968 579.50 i 0.00 z 610.46 e 421.00 h 347.89 d 245.00 c 85.77 a 124.50 231.92 d 508.52 e 675.00 949.00 3778.06
1969 1149.58 a 827.04 a 678.00 568.00 284.88 b 109.00 f 96.62 a 173.71 b 167.00 f 389.50 g 675.00 e 783.02 b 5235.84
1970 913.00 648.00 659.00 587.00 419.00 151.55 a 112.63 a 93.00 d 294.00 523.50 727.22 c 914.50 c 6042.41
1971 851.50 712.00 783.86 c 547.50 349.55 b 323.50 140.05 c 56.83 a 260.00 c 306.00 m 542.00 g 0.00 z 4024.80
1972 0.00 z 832.00 680.50 694.50 396.00 0.00 z 0.00 z 0.00 z 327.00 506.50 694.00 890.00 5020.50
1973 969.00 706.50 675.50 514.00 376.50 285.50 143.50 196.00 229.50 0.00 z 806.50 782.00 5684.50
1974 914.50 747.00 714.50 560.00 467.50 263.50 196.16 b 116.50 117.50 494.50 654.00 775.50 6021.16
1975 898.00 810.00 764.00 626.50 406.32 c 260.00 c 93.50 201.00 228.60 e 524.50 709.62 d 836.00 6358.04
1976 820.50 753.50 814.50 569.50 400.00 345.50 166.00 159.00 157.00 455.50 631.50 797.50 6070.00
1977 983.06 e 656.50 741.00 492.00 466.50 230.50 227.00 82.00 305.50 534.46 d 652.50 g 42.50 z 4718.52
1978 883.50 686.50 536.00 g 228.50 q 413.85 a 145.00 c 76.50 113.50 294.31 a 439.50 828.62 a 934.50 4815.78
1979 1063.00 768.00 633.00 510.50 364.00 246.00 101.00 80.50 193.50 428.50 613.00 f 728.00 5116.00
1980 972.50 736.00 714.50 492.50 376.00 295.50 139.50 144.50 240.00 461.50 656.50 761.64 b 5990.64
1981 767.00 695.50 617.00 477.50 f 423.00 322.00 152.00 78.50 251.00 543.50 617.88 d 857.67 d 5325.05
1982 924.00 772.00 778.10 a 649.50 0.00 z 178.97 a 191.00 202.53 a 262.24 a 578.00 837.00 916.00 6289.34
1983 652.00 g 714.00 693.00 527.50 398.35 a 319.50 232.00 97.50 309.50 517.38 b 639.50 1076.22 a 5524.45
1984 811.00 711.50 628.00 571.50 470.17 a 304.00 155.00 0.00 z 316.00 590.50 751.00 965.50 6274.17
1985 987.50 809.50 760.00 555.00 376.13 a 243.21 b 31.50 97.50 277.00 528.00 976.00 712.50 i 5641.35
1986 544.50 i 781.00 0.00 z 334.00 l 442.86 c 0.00 z 295.00 5.50 g 254.00 399.50 324.00 p 618.00 i 2172.36
1987 891.25 a 453.50 i 688.00 548.65 d 345.00 187.50 b 154.50 93.00 161.00 394.50 619.50 921.50 5004.40
1988 924.00 714.50 698.00 530.50 434.00 286.50 162.50 118.00 249.50 436.00 706.00 854.50 6114.00
1989 857.00 1010.00 829.00 451.50 363.00 187.00 156.00 142.50 154.00 481.50 685.00 815.50 6132.00
1990 824.50 855.00 672.50 477.50 398.50 246.00 69.00 81.00 156.50 575.00 666.00 1017.00 6038.50
1991 917.50 619.50 758.00 547.50 413.50 297.50 135.50 94.00 190.50 523.50 690.50 804.50 5992.00
1992 779.00 674.50 540.50 494.00 300.00 148.50 92.50 83.50 280.50 456.00 695.00 939.50 5483.50
1993 1083.00 810.50 649.50 535.00 257.00 245.00 191.50 132.50 173.50 406.50 839.00 849.00 6172.00
1994 758.50 813.50 664.00 454.00 342.00 264.50 94.00 82.50 155.00 521.50 795.00 887.00 5831.50
1995 870.00 696.50 706.00 521.00 247.00 220.50 85.50 200.50 148.00 547.00 632.50 860.00 5734.50
1996 903.50 842.00 702.00 522.50 484.50 287.50 126.50 92.50 301.00 573.00 778.00 956.50 6569.50
1997 927.00 708.00 744.00 549.50 312.00 265.00 139.00 66.00 209.00 527.50 684.50 834.50 5966.00
1998 882.00 680.50 670.50 530.50 340.50 0.00 z 0.00 z 73.50 117.50 527.50 660.50 881.50 5364.50
1999 841.50 770.52 a 779.00 520.96 d 484.00 308.28 a 180.66 b 103.85 a 211.03 a 532.17 a 688.50 816.00 6236.46
2000 935.54 c 777.00 728.50 a 512.59 a 457.85 e 233.79 a 130.72 a 129.50 225.00 540.95 a 808.93 b 888.87 e 6369.22
2001 858.18 a 794.50 692.73 e 554.44 c 412.76 d 320.00 189.00 134.85 a 230.00 545.71 b 687.32 b 894.02 c 6313.51
2002 841.00 776.00 619.00 i 514.00 451.50 199.82 b 147.50 88.02 c 204.50 559.00 673.50 800.00 5254.84
2003 754.50 751.74 e 683.50 565.00 428.50 173.50 90.50 71.50 168.50 435.50 810.50 858.00 5791.24
2004 855.37 d 741.50 615.50 433.00 338.00 179.00 85.00 67.50 280.00 457.50 705.00 792.50 5549.87
2005 683.00 f 734.00 609.50 504.00 322.00 241.00 120.50 48.00 220.00 497.00 761.00 893.50 4950.50
2006 761.50 799.22 e 432.50 l 523.50 373.50 211.50 115.00 111.00 191.00 477.00 443.50 j 651.00 h 3563.22
2007 700.00 g 697.50 479.00 i 568.80 e 396.50 287.00 95.00 116.50 222.00 g 448.50 f 556.00 h 712.00 f 2161.30
2008 932.50 730.44 e 609.00 g 543.50 f 377.50 327.00 149.50 131.50 213.00 431.00 g 632.00 702.50 h 3493.44
2009 937.15 e 492.50 j 565.00 i 360.50 j 0.00 z 0.00 z 0.00 z 98.00 144.00 f 293.50 m 487.00 i 563.00 m 1035.15
2010 407.00 n 480.50 g 489.50 h 369.50 j 447.50 315.50 132.50 127.00 276.50 477.00 541.50 h 850.50 2626.50
2011 695.50 f 527.50 i 463.00 l 661.80 e 346.50 h 307.00 183.50 82.87 e 119.50 i 396.00 h 782.50 901.50 2919.17
2012 902.50 757.35 c 786.07 c 537.50 428.50 341.00 133.62 b 108.00 168.75 b 505.00 699.00 846.00 6213.29
2013 929.50 701.00 318.50 o 11.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 30.50 z 1630.50
Period of Record Statistics
MEAN 904.19 742.53 708.94 542.38 380.61 244.67 130.29 112.25 215.20 494.47 719.83 860.00 6037.92
S.D. 103.01 70.75 60.09 57.48 65.71 63.20 48.76 42.48 56.23 52.45 77.37 73.93 258.23
SKEW 1.02 0.72 -0.07 0.54 -0.58 -0.34 0.43 0.56 0.00 -0.25 0.65 0.34 -0.13
MAX 1274.50 1010.00 843.00 694.50 484.50 345.50 295.00 238.00 327.00 590.50 976.00 1076.22 6569.50
MIN 724.00 589.08 540.50 423.89 203.00 85.20 11.37 27.00 95.00 361.50 541.00 728.00 5483.50
NO YRS 58 64 59 60 64 64 68 68 62 58 57 57 29