THE DALLES, OREGON

Monthly Total Heating Degree Days

(358407)

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
1893 1181.00 977.50 646.00 460.50 209.50 109.50 5.50 1.50 164.00 486.50 703.00 723.50 5668.00
1894 894.87 a 849.00 644.50 382.50 202.00 93.00 0.00 4.50 150.50 398.00 524.00 915.50 5058.37
1895 1094.00 648.50 613.50 334.00 212.50 54.00 17.00 5.50 181.50 336.00 695.50 879.50 5071.50
1896 906.75 a 596.50 625.50 455.50 269.50 64.00 0.00 1.00 119.00 340.00 897.50 827.50 5102.75
1897 911.00 685.00 721.00 275.00 88.00 56.00 16.00 1.00 113.00 352.00 643.50 902.50 4764.00
1898 894.00 590.50 603.00 328.50 185.50 54.50 2.50 0.00 76.00 418.00 690.00 1005.50 4848.00
1899 943.50 819.00 633.00 408.00 292.50 79.00 5.50 62.53 b 45.50 421.50 533.00 844.50 5087.53
1900 798.00 707.50 430.00 333.00 139.00 11.38 a 4.50 19.00 134.50 421.00 736.50 692.50 4426.88
1901 918.00 756.00 b 606.29 e 430.00 168.00 134.50 20.31 b 2.67 b 157.00 213.00 573.62 a 835.28 d 4814.67
1902 997.50 739.50 607.48 e 382.50 142.50 65.00 c 27.00 6.50 93.62 a 314.00 660.00 950.00 4985.60
1903 854.00 811.00 617.50 429.50 167.50 18.10 a 15.50 11.50 108.00 381.00 678.62 a 894.50 4986.72
1904 770.50 825.50 679.86 b 295.50 182.90 a 70.50 21.50 8.00 58.97 a 335.00 569.50 798.50 4616.23
1905 914.00 804.50 446.50 297.00 196.50 29.50 9.50 19.00 79.50 521.50 727.00 892.00 4936.50
1906 817.50 661.50 649.50 251.50 173.00 91.00 0.00 1.50 87.00 313.10 a 630.50 799.00 4475.10
1907 1177.00 719.00 637.00 387.00 103.50 51.00 1.00 31.00 104.50 250.00 623.00 817.50 4901.50
1908 874.50 736.50 539.00 303.50 271.50 82.00 0.00 28.50 100.00 360.12 a 612.50 950.50 4858.62
1909 1262.73 a 658.00 a 537.50 394.00 221.50 15.50 17.50 6.09 c 87.50 349.27 a 675.50 1120.50 5345.59
1910 1123.00 854.00 418.50 314.00 113.50 67.50 3.00 33.00 96.50 290.00 653.00 792.00 4758.00
1911 901.00 799.00 512.50 386.00 283.50 70.50 9.00 1.50 208.45 a 431.50 665.00 819.50 5087.45
1912 1064.33 a 671.50 654.00 355.00 141.00 46.50 13.00 40.00 0.00 z 0.00 z 0.00 z 0.00 z 2985.33
1913 0.00 z 0.00 z 222.50 u 319.50 162.50 8.00 4.50 1.55 a 0.00 z 351.00 586.61 b 939.41 c 2373.07
1914 780.68 a 692.22 a 459.00 272.31 d 124.50 90.50 0.50 0.00 127.00 398.50 712.22 c 1160.50 4817.94
1915 1024.50 684.00 460.00 208.45 a 187.00 30.52 a 3.00 0.00 73.27 d 317.50 675.00 832.50 4495.73
1916 1397.50 913.00 571.00 311.50 305.00 86.00 30.40 e 16.00 84.50 399.50 785.00 913.98 a 5813.39
1917 959.45 a 651.50 701.00 449.50 217.50 64.00 2.07 a 0.00 42.50 277.50 615.50 643.50 4624.02
1918 737.50 800.00 586.50 343.50 249.50 24.00 0.50 13.50 27.50 289.00 657.50 813.00 4542.00
1919 997.50 702.50 528.15 d 319.50 180.32 a 56.38 a 0.00 c 5.50 142.00 398.00 673.50 1352.00 5355.34
1920 951.00 719.00 553.00 436.50 239.50 61.00 0.00 14.00 117.50 351.50 695.00 811.50 4949.50
1921 824.00 671.50 505.00 366.11 c 157.58 a 29.00 4.00 0.00 125.50 252.00 657.00 984.50 4576.19
1922 1131.00 819.54 b 624.65 a 368.79 a 155.00 0.00 a 0.00 h 2.77 c 102.12 d 184.00 k 698.04 b 1062.86 c 4964.76
1923 801.02 c 902.42 d 470.50 246.50 92.00 20.50 4.50 0.00 38.00 312.50 543.50 798.25 a 4229.68
1924 977.00 547.78 b 549.00 274.29 b 50.50 6.00 1.00 0.00 102.00 318.50 639.50 1069.50 4535.06
1925 743.48 a 537.00 516.00 272.50 71.50 81.50 0.00 23.00 45.50 317.23 a 662.00 715.50 3985.22
1926 795.67 a 491.00 430.26 b 179.50 132.50 22.00 0.00 a 0.00 b 190.00 271.50 616.00 739.50 f 3128.43
1927 1044.70 a 641.00 590.00 362.50 242.00 5.00 1.00 12.50 65.56 c 313.50 512.00 936.00 4725.76
1928 1017.50 756.50 517.00 418.00 79.50 38.00 0.50 4.00 65.50 358.00 612.50 917.50 4784.50
1929 1106.50 1072.00 514.50 385.00 144.00 31.50 4.50 1.00 124.50 291.00 710.50 806.00 5191.00
1930 1496.00 612.50 490.50 280.00 227.00 73.50 3.00 0.00 66.50 435.00 655.00 880.50 5219.50
1931 819.50 682.00 604.50 384.00 94.50 54.83 a 2.00 0.00 108.00 379.50 783.50 1111.50 5023.83
1932 932.00 875.18 a 560.21 c 368.00 182.50 24.50 2.50 18.00 83.00 280.50 603.50 1051.00 4980.89
1933 932.58 a 885.11 a 606.50 369.00 290.50 31.00 0.00 21.00 173.00 282.50 591.50 679.86 b 4862.56
1934 709.00 556.50 409.00 181.50 134.00 24.50 0.00 3.00 140.00 299.50 562.00 767.25 a 3786.25
1935 1009.50 637.28 c 687.50 408.00 176.00 26.00 22.00 13.50 36.00 413.50 823.00 885.05 a 5137.33
1936 803.33 b 1086.94 c 600.50 249.50 99.41 b 31.50 2.00 2.50 103.50 302.00 861.50 761.00 4903.68
1937 1446.00 893.50 545.00 427.50 140.50 53.00 4.00 20.50 71.50 237.00 580.00 784.00 5202.50
1938 868.50 775.00 633.50 322.00 198.50 24.50 13.00 7.00 16.00 336.00 717.50 807.50 4719.00
1939 749.34 b 763.54 b 516.48 c 253.00 108.50 73.00 0.00 8.50 37.50 264.00 655.50 761.00 4190.37
1940 977.00 663.50 441.50 305.00 69.50 7.50 0.00 0.00 19.50 240.00 747.00 902.00 4372.50
1941 916.50 645.56 a 428.83 a 242.14 b 172.05 a 14.00 0.00 7.00 86.25 b 309.50 586.00 816.85 a 4224.68
1942 1182.00 715.50 602.43 a 299.00 198.00 69.00 7.50 1.50 0.00 z 245.50 698.50 789.00 4807.93
1943 1180.00 703.50 607.50 279.00 236.00 87.50 5.50 5.00 11.38 a 325.50 676.50 0.00 z 4117.38
1944 0.00 z 180.00 u 579.00 333.50 145.00 47.00 1.00 0.00 60.00 184.00 648.10 a 904.50 2902.10
1945 768.50 633.00 616.00 356.00 121.50 44.00 0.00 0.00 94.00 252.50 676.00 892.50 4454.00
1946 797.50 647.00 552.00 313.50 69.50 45.50 0.00 0.00 72.50 416.50 738.00 761.50 4413.50
1947 950.50 602.00 451.00 244.50 36.00 47.00 0.00 4.00 49.00 314.50 547.00 784.00 4029.50
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 8.00 1.03 a 144.83 a 440.64 c 698.28 a 968.50 2261.28
1949 1299.50 805.50 583.50 246.50 113.50 42.00 0.50 4.65 a 49.14 a 450.50 512.00 772.00 4879.29
1950 1344.00 949.00 633.50 408.50 211.83 a 64.00 6.50 2.58 a 44.50 366.00 606.50 748.00 5384.92
1951 875.00 719.50 658.00 253.00 158.00 31.03 a 3.50 18.50 37.00 338.00 669.50 923.50 4684.53
1952 1120.50 743.00 606.50 310.50 143.50 76.50 6.00 11.00 26.90 a 147.50 800.69 a 853.00 4845.59
1953 613.50 581.00 528.50 391.00 230.00 108.50 1.50 12.50 51.21 a 256.50 546.50 696.00 4016.71
1954 967.00 687.50 641.00 355.50 165.00 101.50 21.50 15.50 a 58.50 385.00 477.00 882.50 4757.50
1955 844.50 687.50 709.00 495.50 211.83 a 52.00 28.50 3.50 88.00 299.00 821.50 913.50 5154.33
1956 908.50 952.86 a 584.50 276.50 93.50 49.00 0.50 6.50 37.00 336.50 674.00 791.50 4710.86
1957 1319.50 741.00 598.00 303.50 53.00 16.50 1.00 1.00 19.00 361.50 637.00 737.50 4788.50
1958 781.00 509.50 584.00 338.50 51.50 3.00 3.50 0.00 56.00 243.50 608.50 768.00 3947.00
1959 849.50 665.00 536.00 298.00 223.50 22.00 4.50 1.50 72.00 259.50 694.00 820.00 4445.50
1960 1092.00 686.50 600.00 341.50 227.50 35.00 3.00 22.50 38.00 246.00 605.50 920.50 4818.00
1961 823.00 538.00 497.00 344.50 169.47 a 19.50 1.50 0.00 85.00 340.00 750.50 806.50 4374.97
1962 891.50 673.00 646.00 253.50 260.50 68.00 13.50 1.50 41.50 282.00 525.00 753.30 a 4409.30
1963 983.22 a 631.50 528.50 394.00 162.75 a 50.00 9.00 4.50 16.00 245.50 543.50 892.50 4460.97
1964 737.00 588.50 580.50 381.50 228.00 61.50 5.00 19.50 65.00 291.00 679.00 959.00 4595.50
1965 827.00 562.50 560.00 273.50 189.00 38.00 6.00 10.00 74.00 200.00 524.50 828.50 4093.00
1966 830.50 614.50 556.50 277.00 143.00 77.00 15.50 2.07 a 28.00 306.00 536.00 751.00 4137.07
1967 658.50 544.50 592.00 448.50 140.50 9.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2393.00
1968 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
1969 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
1970 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
1971 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
1972 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
1973 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
1974 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
1975 0.00 z 740.50 604.00 456.00 184.00 57.93 a 1.00 23.00 47.50 382.50 702.41 a 796.00 3994.84
1976 842.50 706.36 a 623.10 a 394.00 161.00 89.00 11.22 b 24.50 40.00 348.75 c 613.00 856.00 4709.43
1977 1045.00 600.00 546.50 231.50 229.50 10.86 a 10.69 b 5.50 95.17 a 316.09 c 706.50 745.07 b 4542.38
1978 897.50 640.00 459.50 343.00 190.65 a 22.50 6.50 15.50 90.00 276.42 a 799.00 900.66 c 4641.23
1979 1380.00 761.00 500.00 291.50 83.50 13.00 7.50 3.32 c 4.00 202.00 697.24 a 726.00 4669.06
1980 1096.50 806.50 561.50 301.03 a 120.38 a 51.21 a 4.00 8.78 a 41.50 307.93 a 567.00 805.45 c 4671.79
1981 715.50 660.59 a 491.19 b 325.86 a 120.79 b 61.55 a 14.50 0.00 a 88.45 a 350.50 568.00 773.00 4169.94
1982 817.00 705.00 565.50 429.50 132.50 27.00 10.00 1.50 69.00 363.50 724.00 830.50 4675.00
1983 767.50 630.00 449.00 340.00 139.00 35.50 7.50 1.50 94.50 347.00 507.50 1122.50 4441.50
1984 882.50 663.50 464.00 369.50 223.50 77.00 0.00 0.00 93.50 392.50 652.00 931.00 4749.00
1985 1006.50 787.00 577.00 278.00 162.50 43.00 0.00 12.00 151.00 365.00 941.50 1232.50 5556.00
1986 888.50 681.50 443.00 397.50 212.50 17.50 17.57 a 0.00 142.50 294.00 595.00 932.50 4622.07
1987 973.50 640.50 537.50 259.00 102.00 30.50 5.50 1.00 35.00 229.00 557.50 849.40 a 4220.40
1988 921.73 a 646.50 520.00 294.50 194.00 72.50 7.00 1.00 64.50 139.50 536.50 821.50 4219.23
1989 746.00 957.00 630.50 244.50 152.50 26.50 5.50 0.00 20.50 297.50 509.50 838.50 4428.50
1990 717.50 694.50 489.00 216.50 192.00 48.50 3.50 0.00 2.50 363.00 522.00 1080.50 4329.50
1991 925.00 558.50 611.00 354.00 210.00 79.00 0.00 0.00 18.50 301.00 606.50 752.50 4416.00
1992 744.50 570.50 407.50 275.50 83.50 10.00 0.00 5.50 77.50 260.00 594.00 929.50 3958.00
1993 1152.00 867.50 664.50 364.00 89.00 53.50 7.00 10.00 61.00 240.50 829.00 838.50 5176.50
1994 726.00 788.00 511.00 264.50 114.50 63.50 3.00 0.00 10.50 320.50 702.50 819.00 4323.00
1995 931.50 605.00 563.50 374.00 119.50 0.00 z 0.00 10.00 28.50 333.50 509.00 834.00 4308.50
1996 859.00 895.00 572.00 335.00 230.50 0.00 z 14.50 3.00 92.00 329.00 668.00 908.00 4906.00
1997 922.50 651.50 564.50 382.00 115.00 46.00 5.50 0.00 35.50 341.00 606.50 802.50 4472.50
1998 885.50 595.00 517.50 347.00 0.00 z 0.00 z 0.00 z 0.00 z 21.50 359.00 555.50 873.00 4154.00
1999 751.50 666.00 640.00 447.93 a 298.50 104.50 44.00 7.23 a 95.17 a 410.00 561.50 778.10 a 4804.44
2000 927.50 746.00 633.43 a 346.00 201.50 57.41 a 22.50 17.64 b 132.00 0.00 z 0.00 z 917.50 4001.49
2001 899.50 745.50 576.00 466.50 0.00 z 0.00 z 5.50 0.00 z 46.03 a 360.00 626.00 818.00 4543.03
2002 800.00 676.00 673.22 a 398.00 209.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2756.22
2003 730.50 637.00 503.50 414.50 230.50 31.00 5.50 0.00 56.50 245.50 765.52 a 0.00 z 3620.02
2004 0.00 z 643.00 463.45 a 324.31 a 160.00 73.00 7.00 4.50 0.00 z 290.50 631.50 787.00 3384.26
2005 890.50 708.81 a 509.50 403.50 156.00 84.31 a 3.00 9.50 108.62 a 323.50 707.59 a 1020.50 4925.33
2006 734.50 751.00 621.50 372.50 200.00 38.00 0.00 z 13.12 e 70.00 338.00 684.00 909.50 4732.12
2007 950.00 689.50 510.00 412.50 168.50 79.00 0.00 9.00 90.50 422.00 678.50 0.00 z 4009.50
2008 0.00 z 635.00 0.00 z 543.50 204.50 104.00 7.50 0.00 z 0.00 z 469.50 581.00 0.00 z 2545.00
2009 0.00 z 0.00 z 694.00 425.00 203.00 20.50 5.50 8.50 62.00 502.50 800.50 1069.50 3791.00
2010 816.50 636.00 602.00 439.00 279.50 104.00 19.00 6.00 79.00 317.50 708.00 890.00 4896.50
2011 817.37 a 757.62 b 667.03 b 528.10 a 292.90 b 92.07 a 16.00 2.07 a 58.45 a 324.00 696.50 944.47 a 5196.57
2012 926.00 719.09 b 650.47 b 398.28 a 215.89 c 115.86 a 8.78 a 7.50 40.71 b 369.42 a 576.00 817.00 4845.00
2013 979.60 a 649.19 a 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 1628.79
Period of Record Statistics
MEAN 934.17 711.63 565.18 344.02 171.01 51.01 6.72 7.77 76.99 326.78 650.35 869.44 4704.40
S.D. 175.49 115.16 74.41 72.84 61.50 29.75 7.96 9.96 43.97 70.99 90.82 119.08 399.69
SKEW 1.08 0.86 -0.22 0.15 0.04 0.37 1.85 2.35 0.64 0.10 0.54 1.24 0.13
MAX 1496.00 1086.94 721.00 543.50 305.00 134.50 44.00 62.53 208.45 521.50 941.50 1352.00 5813.39
MIN 613.50 491.00 407.50 179.50 36.00 0.00 0.00 0.00 2.50 139.50 477.00 643.50 3786.25
NO YRS 107 110 110 112 110 107 109 108 106 108 109 105 91