DAYTON 1 WSW, WASHINGTON

Monthly Total Heating Degree Days

(452030)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200506
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
1931 856.12 a 795.50 666.00 480.00 208.50 94.00 12.50 9.50 207.50 463.00 877.50 1026.50 5696.62
1932 1024.50 892.00 706.00 435.50 286.00 100.00 47.50 48.00 135.50 406.00 588.00 1115.00 5784.00
1933 916.50 1003.50 657.50 476.00 399.00 119.00 13.00 45.00 208.50 305.50 690.50 712.50 5546.50
1934 693.00 650.50 473.00 233.00 180.50 72.50 16.00 3.50 192.50 365.00 611.00 917.00 4407.50
1935 929.50 757.00 770.50 545.00 255.50 74.50 33.00 23.00 72.50 381.00 864.00 1013.00 5718.50
1936 896.50 1300.50 687.00 322.50 131.50 67.00 4.00 9.00 142.50 334.00 881.00 821.50 5597.00
1937 1534.50 841.50 589.00 503.50 220.50 84.50 7.00 51.00 122.00 300.50 599.00 860.50 5713.50
1938 948.00 798.00 666.00 422.50 274.50 59.50 22.00 30.50 46.00 369.50 826.50 895.50 5358.50
1939 810.00 865.50 621.50 382.00 214.50 141.00 17.00 8.00 78.50 378.50 607.50 742.00 4866.00
1940 992.50 697.50 535.00 420.50 158.00 50.50 7.00 2.50 72.50 322.50 905.00 906.50 5070.00
1941 953.50 681.00 532.50 362.00 294.00 119.50 0.00 33.00 215.50 500.50 619.00 841.50 5152.00
1942 1350.50 821.00 656.50 383.00 339.00 154.50 9.50 33.00 73.00 349.50 760.50 839.50 5769.50
1943 1190.92 a 781.50 757.50 363.00 356.50 170.50 21.00 17.00 43.00 394.50 771.50 1009.00 5875.92
1944 995.00 850.00 741.50 425.50 231.00 98.50 16.02 a 10.50 100.00 265.50 757.50 1070.50 5561.52
1945 884.00 723.50 742.00 530.00 225.50 147.50 5.50 12.00 197.00 337.50 707.50 990.00 5502.00
1946 878.50 701.50 664.00 404.00 226.00 137.00 17.50 11.50 153.00 549.50 770.69 a 871.00 5384.19
1947 1078.50 716.00 543.50 398.00 123.00 108.00 8.50 23.00 112.00 355.50 754.50 858.50 5079.00
1948 968.50 882.50 780.50 536.00 343.00 47.00 40.00 22.00 184.50 478.00 721.00 1111.50 6114.50
1949 1503.50 887.00 690.00 356.50 172.50 145.00 24.50 21.50 112.00 570.92 a 599.00 920.50 6002.92
1950 1512.80 a 844.00 737.50 540.50 321.00 133.50 8.00 13.50 133.00 401.00 711.00 822.50 6178.30
1951 1001.50 812.00 807.50 488.00 260.00 140.00 15.50 40.50 129.50 501.00 759.00 1078.00 6032.50
1952 1110.50 775.00 719.50 368.50 228.00 112.00 21.50 41.00 90.50 314.50 942.00 898.50 5621.50
1953 610.50 711.50 640.50 525.50 345.50 204.50 7.50 27.50 111.00 398.50 625.50 815.00 5023.00
1954 999.00 751.00 798.50 525.50 262.00 190.00 25.00 56.00 184.00 523.50 585.00 952.00 5851.50
1955 1012.50 852.50 871.50 609.00 386.50 87.00 65.00 22.50 204.00 409.00 945.00 1024.00 6488.50
1956 956.00 1086.50 696.00 386.50 229.00 136.00 11.00 38.50 136.50 480.00 866.50 883.00 5905.50
1957 1428.00 830.50 687.00 439.00 191.00 87.00 17.00 46.50 107.00 526.50 747.50 777.00 5884.00
1958 856.00 503.50 699.50 493.50 143.00 60.00 6.50 0.50 161.50 376.50 696.50 855.50 4852.50
1959 922.00 823.00 663.00 437.50 380.50 95.50 32.50 47.53 a 200.50 434.00 831.50 964.00 5831.53
1960 1254.50 798.50 681.50 461.00 354.50 98.50 6.50 87.00 128.50 382.00 699.50 1065.50 6017.50
1961 908.00 586.00 619.00 492.50 282.00 35.50 3.50 1.50 217.00 464.00 865.00 929.50 5403.50
1962 1022.50 765.00 757.00 407.50 413.00 150.50 63.00 58.50 122.50 435.00 653.50 841.00 5689.00
1963 1195.00 658.50 628.00 533.50 257.50 132.00 37.00 30.50 70.50 314.00 643.50 1020.00 5520.00
1964 801.50 768.50 749.00 550.50 337.50 130.50 29.00 70.00 195.00 439.00 778.00 1024.00 5872.50
1965 941.00 690.50 770.00 399.50 316.50 91.00 33.50 40.50 216.50 288.00 614.00 915.00 5316.00
1966 888.00 745.00 647.00 455.00 233.00 158.00 36.50 19.00 66.00 415.50 620.00 775.50 5058.50
1967 738.83 a 677.00 711.50 609.00 309.00 65.50 2.50 1.00 37.00 359.00 722.50 930.50 5163.33
1968 887.50 680.50 540.50 561.50 260.50 96.50 15.50 55.50 133.00 481.50 705.00 1000.50 5418.00
1969 1327.00 844.00 669.50 458.50 191.50 57.00 28.50 38.00 105.50 527.50 670.00 909.00 5826.00
1970 630.00 i 695.50 720.00 617.50 273.32 a 88.50 15.50 7.00 248.00 484.00 710.50 901.00 4760.82
1971 830.50 721.50 806.50 545.50 243.50 233.00 56.00 12.50 246.00 540.50 724.00 923.00 5882.50
1972 0.00 z 870.50 601.00 563.50 237.50 90.00 24.50 24.00 206.50 453.00 685.50 1144.00 4900.00
1973 1056.50 754.50 637.00 487.00 219.50 0.00 z 23.54 d 37.00 142.00 419.50 755.50 770.00 5302.04
1974 1160.00 663.50 668.50 481.00 361.50 79.50 34.00 8.50 85.50 0.00 z 652.50 834.50 5029.00
1975 963.58 a 843.50 774.00 612.50 305.50 153.00 13.50 54.00 99.00 417.50 735.50 857.00 5828.58
1976 860.00 809.50 762.50 497.00 247.50 173.50 18.00 51.50 64.00 418.00 705.50 944.00 5551.00
1977 1203.50 713.50 716.50 385.50 375.50 31.50 36.00 40.50 201.50 459.50 768.00 918.00 5849.50
1978 980.00 717.00 608.50 490.50 341.50 68.50 26.00 59.50 175.50 412.00 918.00 1109.00 5906.00
1979 1508.50 810.00 606.50 479.50 240.50 96.00 26.00 0.50 66.43 b 309.47 b 847.00 806.00 5796.39
1980 1168.00 801.00 726.00 350.69 a 273.50 183.10 a 9.00 50.38 c 124.50 442.50 694.00 816.00 5638.67
1981 881.00 724.00 611.50 476.50 292.00 188.00 25.46 c 7.50 148.00 462.50 631.00 876.00 5323.46
1982 992.50 785.50 673.00 564.00 276.50 88.50 39.50 12.50 158.50 475.00 849.50 926.00 5841.00
1983 768.50 618.50 583.50 481.50 268.00 126.00 45.00 10.50 221.50 429.50 603.50 1271.50 5427.50
1984 961.00 788.00 610.00 517.00 370.00 175.50 20.50 9.00 213.50 544.00 713.00 1141.00 6062.50
1985 1241.55 a 940.50 724.00 400.00 238.50 99.00 0.00 42.00 287.50 504.50 1125.00 1411.50 7014.05
1986 942.00 758.50 538.00 496.50 306.50 42.50 58.50 0.00 247.50 366.50 703.50 1027.00 5487.00
1987 1091.00 716.00 583.50 326.00 189.50 80.50 34.50 34.50 89.50 368.00 657.50 987.50 5158.00
1988 1017.50 760.00 670.00 405.00 276.00 141.00 23.50 16.50 173.00 245.50 629.50 984.50 5342.00
1989 895.00 1134.50 704.00 365.50 294.00 50.50 18.00 38.50 94.50 432.50 619.50 971.50 5618.00
1990 808.50 820.00 632.50 337.50 308.50 125.50 18.50 27.50 38.50 459.00 605.50 1221.00 5402.50
1991 1054.50 582.50 736.50 479.00 349.00 174.50 16.00 10.50 70.50 428.00 730.00 876.50 5507.50
1992 823.00 635.00 539.50 357.00 163.00 56.50 18.50 44.00 189.50 398.50 769.50 980.50 4974.50
1993 1234.00 985.00 700.50 446.00 165.00 119.50 56.50 50.50 141.00 342.00 928.00 891.00 6059.00
1994 745.00 848.00 573.00 363.00 204.50 103.00 27.50 5.00 64.00 458.00 760.00 875.50 5026.50
1995 934.00 644.00 639.50 489.50 238.00 129.50 11.50 59.00 87.50 495.50 601.50 951.00 5280.50
1996 954.50 949.00 700.50 395.50 364.50 100.00 21.50 24.50 186.00 429.50 756.50 905.50 5787.50
1997 976.50 742.50 616.00 505.00 181.50 96.00 25.00 3.50 92.00 438.00 665.50 941.00 5282.50
1998 847.50 612.00 614.50 455.00 289.50 55.00 0.00 18.50 67.00 431.50 624.00 909.00 4923.50
1999 763.00 683.00 643.00 498.50 337.50 119.00 35.00 23.00 135.50 421.50 550.50 825.00 5034.50
2000 920.00 730.50 645.00 330.00 a 208.50 88.50 12.00 51.50 169.50 443.50 911.50 1047.00 5557.50
2001 1003.00 821.00 592.00 511.50 236.50 128.50 16.00 11.00 54.00 431.50 646.00 911.00 5362.00
2002 883.00 728.50 772.00 446.50 281.00 90.00 14.00 28.50 132.50 527.50 729.00 827.50 5460.00
2003 776.00 738.50 551.50 455.00 277.50 51.00 5.50 2.50 98.00 296.00 827.00 931.00 5009.50
2004 1142.00 746.00 515.50 378.00 233.00 101.50 8.00 13.00 138.50 382.00 693.50 877.50 5228.50
2005 914.00 747.00 551.50 419.00 185.50 122.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2939.50
2006 0.00 z 0.00 z 0.00 z 263.50 m 36.00 z 10.50 x 0.00 v 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
Period of Record Statistics
MEAN 1001.04 779.82 665.61 455.05 266.58 109.45 21.88 27.54 137.48 417.30 731.32 940.42 5553.93
S.D. 198.60 123.96 81.29 78.79 68.39 43.22 15.17 19.84 59.65 73.14 110.06 122.09 421.73
SKEW 0.99 1.33 -0.03 -0.09 0.07 0.45 0.97 0.52 0.28 -0.13 0.88 1.15 0.28
MAX 1534.50 1300.50 871.50 617.50 413.00 233.00 65.00 87.00 287.50 570.92 1125.00 1411.50 7014.05
MIN 610.50 503.50 473.00 233.00 123.00 31.50 0.00 0.00 37.00 245.50 550.50 712.50 4407.50
NO YRS 73 75 75 75 75 74 74 74 74 73 74 74 70