DAYTON 1 WSW, WASHINGTON

Monthly Total Heating Degree Days

(452030)

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
1893 0.00 z 0.00 z 0.00 z 607.50 332.50 192.00 41.73 e 0.00 z 189.50 481.50 773.00 778.00 3395.73
1894 979.50 920.00 698.50 0.00 z 0.00 z 128.00 0.00 11.00 196.50 0.00 z 0.00 z 0.00 z 2933.50
1895 0.00 z 0.00 z 0.00 z 353.50 0.00 z 0.00 z 0.00 z 22.00 311.50 424.50 0.00 z 0.00 z 1111.50
1896 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 0.00 z 931.50 783.50 1715.00
1897 1038.50 755.00 839.00 382.00 146.50 120.50 0.00 z 16.00 169.00 425.50 771.92 d 951.50 5615.42
1898 1053.50 595.50 782.00 383.50 297.00 122.50 0.00 z 0.00 z 140.50 471.00 809.00 1202.50 5857.00
1899 936.00 1013.00 750.00 215.00 s 406.50 184.50 15.50 122.50 109.00 563.00 531.50 862.50 5494.00
1900 786.50 897.50 537.85 a 407.50 208.50 29.00 27.50 53.00 131.00 422.00 783.50 801.50 5085.35
1901 1050.50 905.50 608.50 556.00 251.62 a 218.50 20.00 0.60 e 0.00 z 0.00 z 0.00 z 0.00 z 3611.21
1902 1035.00 720.50 0.00 z 494.00 348.00 108.21 b 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2705.71
1903 0.00 z 0.00 z 704.00 531.00 305.00 38.50 63.50 47.00 175.00 359.00 679.00 962.50 3864.50
1904 864.50 774.00 771.50 345.00 0.00 z 131.50 29.50 17.00 89.50 327.50 535.00 873.00 4758.00
1905 960.50 887.00 572.00 383.50 347.00 114.50 7.50 42.50 139.00 559.00 711.00 929.50 5653.00
1906 838.50 750.50 764.50 337.00 296.00 154.50 0.00 25.00 0.00 z 0.00 z 0.00 z 0.00 z 3166.00
1907 0.00 z 0.00 z 0.00 z 0.00 z 227.00 169.50 31.50 109.00 180.50 281.50 630.00 a 830.50 2459.50
1908 891.50 788.80 d 671.67 d 455.40 e 334.05 b 161.90 a 13.00 46.50 e 135.50 433.00 589.50 970.00 5490.81
1909 1209.50 688.00 625.00 542.50 330.50 93.00 49.50 26.50 134.00 389.00 646.00 1155.50 5889.00
1910 1060.50 1008.00 483.50 0.00 z 191.00 104.50 11.00 28.00 101.00 259.50 677.00 884.00 4808.00
1911 939.00 962.00 589.00 496.00 360.00 115.18 b 22.50 18.50 246.50 442.50 765.50 911.00 5867.68
1912 992.00 765.50 786.00 478.50 244.50 109.00 47.50 85.00 213.00 533.50 624.00 883.50 5762.00
1913 1067.00 1021.00 788.50 439.00 246.00 98.50 40.50 25.00 132.00 524.00 633.50 1058.00 6073.00
1914 697.00 839.00 585.00 438.00 226.00 165.00 6.00 11.00 198.50 423.00 681.50 1194.00 5464.00
1915 1072.00 650.00 540.50 351.50 241.00 89.00 13.50 1.00 183.50 394.50 726.00 861.00 5123.50
1916 1462.50 958.00 622.50 421.55 a 348.48 b 123.50 32.50 8.00 122.50 423.00 890.00 1101.00 6513.53
1917 1007.00 840.50 863.50 534.00 264.00 116.00 5.00 0.50 30.00 f 317.00 567.50 659.00 5174.00
1918 828.50 799.50 575.00 422.00 392.00 35.50 5.00 33.50 34.00 261.50 741.50 910.00 5038.00
1919 880.50 811.50 612.00 364.50 262.00 116.50 0.00 0.50 120.50 553.00 809.50 1293.00 5823.50
1920 1059.00 823.00 715.50 546.50 338.00 108.50 4.50 36.17 a 143.50 422.00 713.50 833.00 5743.17
1921 895.50 706.50 602.50 475.50 209.00 24.00 36.00 13.00 240.00 297.08 a 672.00 1078.00 5249.08
1922 1260.50 928.00 735.50 545.50 266.50 1.50 2.50 34.00 60.50 346.00 901.50 1080.87 a 6162.87
1923 838.50 1047.00 660.00 418.50 273.50 177.00 24.50 13.00 129.50 481.50 731.00 971.00 5765.00
1924 1159.50 610.00 748.00 483.50 131.50 77.00 27.50 54.00 179.50 415.50 810.00 1233.00 5929.00
1925 806.00 596.50 639.00 348.50 183.00 107.50 0.00 42.00 152.50 478.00 747.50 825.50 4926.00
1926 972.50 583.00 569.00 284.50 240.50 69.50 3.50 15.00 299.50 374.50 662.00 942.50 5016.00
1927 1101.00 705.00 713.50 494.50 389.00 68.50 10.50 31.50 237.00 401.00 605.00 1134.00 5890.50
1928 1063.50 860.00 606.50 520.00 153.00 106.50 16.50 17.50 161.00 417.00 711.00 1035.50 5668.00
1929 1374.50 1172.50 632.00 554.50 221.50 33.50 j 14.50 10.50 218.00 383.50 778.50 798.00 6158.00
1930 1622.00 615.50 635.00 297.00 319.50 131.50 9.50 10.50 143.00 569.50 795.50 1062.00 6210.50
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 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 0.00
2007 1062.50 775.50 553.50 511.00 h 314.00 l 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1136.50 0.00 z 3528.00
2008 0.00 z 977.50 0.00 z 926.40 e 605.02 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 645.00 1131.00 4284.92
2009 1037.00 836.50 828.50 503.50 267.00 75.00 14.98 a 20.50 111.00 581.50 701.00 1179.50 6155.98
2010 819.50 677.50 649.50 494.50 398.00 143.00 39.00 36.50 141.50 394.00 845.00 944.50 5582.50
2011 960.00 880.50 686.50 621.72 a 389.50 201.60 e 35.50 6.00 54.50 i 438.00 759.50 1049.00 6027.82
2012 972.50 837.00 730.00 432.00 313.00 157.00 20.00 14.00 107.50 475.50 479.50 866.97 a 5404.97
2013 1127.62 c 748.00 683.66 c 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 2559.29
Period of Record Statistics
MEAN 1007.66 793.19 667.36 458.40 274.53 111.38 21.27 28.05 144.99 420.05 728.48 951.88 5581.70
S.D. 192.88 130.53 84.99 91.88 76.64 45.56 15.48 22.58 60.34 77.37 114.07 132.45 421.76
SKEW 1.04 0.89 0.07 1.02 0.63 0.20 0.85 1.36 0.34 -0.06 0.84 0.77 0.18
MAX 1622.00 1300.50 871.50 926.40 605.02 233.00 65.00 122.50 311.50 581.50 1136.50 1411.50 7014.05
MIN 610.50 503.50 473.00 233.00 123.00 1.50 0.00 0.00 34.00 245.50 479.50 659.00 4407.50
NO YRS 112 115 114 113 114 113 111 112 110 110 113 112 95