SALEM WSO AIRPORT, OREGON

Monthly Total Heating Degree Days

(357500)

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
1892 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
1893 966.50 681.00 596.00 526.50 348.50 219.83 a 101.50 74.50 260.00 517.00 645.50 652.00 5588.83
1894 734.00 732.00 622.50 445.00 323.50 169.50 46.50 0.00 173.00 396.50 565.00 801.00 5008.50
1895 809.00 630.00 642.50 400.00 95.50 w 132.00 67.00 52.00 242.00 351.00 634.00 708.00 4667.50
1896 674.00 554.00 612.00 524.00 381.50 143.50 6.50 35.00 163.00 343.50 762.00 628.00 4827.00
1897 779.00 22.50 z 347.50 o 350.50 187.00 138.00 67.00 20.00 189.00 398.50 575.50 683.50 3388.00
1898 326.00 r 553.00 678.00 401.50 278.00 106.50 48.50 25.50 132.00 418.00 610.50 843.50 4095.00
1899 639.00 615.44 c 648.42 a 503.50 373.00 189.64 b 58.00 116.50 107.50 462.00 431.50 673.00 4817.50
1900 670.50 621.50 457.00 430.50 202.50 35.50 10.50 14.50 0.00 z 287.00 0.00 z 0.00 z 2729.50
1901 0.00 z 0.00 z 0.00 z 0.00 z 244.42 e 196.20 e 0.00 z 24.00 l 165.00 177.50 0.00 z 763.50 1546.62
1902 812.50 528.00 620.50 466.00 286.50 138.00 0.00 z 0.00 z 189.50 354.00 628.50 738.00 4761.50
1903 676.50 693.50 610.50 483.00 293.50 103.00 72.50 39.00 117.00 346.50 576.50 730.50 4742.00
1904 715.00 683.50 662.50 345.00 232.50 121.00 52.50 34.00 107.00 306.00 444.50 688.50 4392.00
1905 759.00 630.00 434.50 318.50 291.50 128.50 15.50 46.00 109.00 447.00 657.00 761.00 4597.50
1906 665.50 573.50 618.00 311.50 266.00 175.00 2.50 10.00 113.50 307.00 536.00 654.50 4233.00
1907 903.50 506.59 a 598.50 386.50 221.50 138.50 12.00 12.00 w 46.50 u 43.00 z 88.50 y 285.50 r 2767.09
1908 438.50 l 251.00 q 588.47 b 410.56 c 319.00 h 176.50 4.02 d 17.50 q 164.50 341.50 511.00 806.50 3003.04
1909 942.50 591.50 548.00 457.00 349.00 113.50 86.50 40.00 117.00 363.00 550.00 903.50 5061.50
1910 816.00 712.50 426.00 377.50 193.50 164.50 23.50 74.00 184.50 314.50 585.00 674.50 4546.00
1911 815.00 696.50 511.50 465.54 b 363.50 180.52 a 32.50 19.00 241.00 390.00 564.00 740.00 5019.05
1912 706.50 586.73 a 469.50 g 469.50 246.50 128.00 54.25 e 60.00 i 161.38 a 454.00 560.50 760.00 4127.36
1913 813.50 687.50 630.50 424.50 263.00 114.50 56.50 14.50 0.00 z 423.50 671.00 827.50 4926.50
1914 673.50 664.50 541.00 423.50 196.50 169.50 11.50 16.50 179.50 301.00 564.50 881.50 4623.00
1915 791.00 574.00 406.50 305.00 283.50 139.50 39.00 1.00 123.50 264.50 565.50 699.50 4192.50
1916 992.00 545.00 574.50 382.50 374.00 163.50 63.00 6.50 93.50 383.50 692.00 822.50 5092.50
1917 739.00 670.50 723.50 513.50 336.50 131.00 9.00 2.00 90.50 311.00 434.50 530.00 4491.00
1918 643.00 652.00 539.00 282.00 290.00 46.50 36.50 44.50 56.50 315.50 616.50 754.00 4276.00
1919 765.70 a 661.00 608.00 439.00 292.00 180.50 49.00 25.50 137.50 590.55 a 0.00 z 695.00 j 3748.75
1920 845.00 740.54 a 655.50 533.50 371.00 159.50 66.50 69.00 123.00 g 419.53 a 611.50 698.00 5169.57
1921 781.00 559.50 571.00 460.50 300.00 68.00 40.50 29.50 195.00 286.50 520.50 830.50 4642.50
1922 909.33 a 726.00 691.50 519.00 273.00 30.00 5.50 19.00 92.50 338.50 707.50 788.50 5100.33
1923 686.00 785.00 608.00 383.00 253.50 136.00 19.00 6.00 82.50 332.00 510.00 718.00 4519.00
1924 822.50 506.50 602.00 389.50 158.00 61.00 20.00 20.50 121.00 320.00 608.00 902.00 4531.00
1925 634.50 529.00 570.00 354.00 172.50 116.50 5.00 43.50 104.50 332.00 603.00 616.00 4080.50
1926 749.50 480.00 394.50 186.50 217.00 63.50 3.50 7.50 161.00 279.00 492.50 719.50 3754.00
1927 784.62 b 579.00 584.50 418.50 336.50 46.00 7.00 18.50 126.00 339.97 a 471.72 a 862.32 a 4574.63
1928 789.50 651.50 462.00 441.50 148.00 147.93 a 37.50 34.00 157.76 a 342.55 a 600.50 833.38 a 4646.12
1929 959.00 812.00 561.50 530.00 281.50 144.00 e 33.50 20.84 b 121.50 274.00 663.00 616.50 5017.34
1930 1164.50 536.00 539.50 391.00 401.00 205.00 105.63 d 39.86 c 132.50 426.00 651.50 815.50 5407.99
1931 687.17 a 641.00 566.86 c 388.00 204.08 a 163.00 20.00 43.00 165.50 374.00 701.00 814.27 a 4767.87
1932 828.50 726.00 583.32 a 443.00 319.50 97.24 a 66.00 34.00 122.50 296.50 536.00 877.30 a 4929.86
1933 813.50 768.00 600.00 467.50 400.00 145.00 50.12 a 35.50 214.66 a 321.22 b 636.50 584.72 b 5036.72
1934 472.00 g 533.62 b 402.00 277.50 b 202.02 a 104.00 45.00 20.00 174.50 300.50 447.50 704.00 3210.63
1935 773.00 602.50 671.00 446.50 328.00 120.00 a 74.00 64.00 86.00 430.90 a 720.00 a 803.50 5119.40
1936 691.50 852.91 a 649.50 346.50 214.00 91.50 27.00 24.50 143.00 301.50 717.00 695.50 4754.41
1937 1083.00 656.50 509.50 450.00 243.00 97.00 30.00 60.00 139.50 279.00 485.50 698.50 4731.50
1938 797.50 632.00 611.00 397.50 265.00 94.00 27.50 51.00 35.50 342.00 674.00 715.00 4642.00
1939 717.00 706.50 541.50 362.00 243.50 171.00 35.50 30.00 83.00 332.00 536.50 627.50 4386.00
1940 785.50 570.50 485.00 386.00 181.87 a 82.00 11.00 h 3.50 l 69.50 204.50 i 646.50 690.30 c 3897.17
1941 714.50 549.65 e 429.50 359.00 271.00 104.00 3.00 28.00 146.00 343.50 551.50 709.00 4208.65
1942 910.50 615.00 598.50 394.50 287.00 170.00 17.00 23.50 82.00 300.50 577.00 653.00 4628.50
1943 966.00 588.50 610.00 350.50 329.00 155.50 27.00 14.50 48.00 328.00 580.00 801.00 4798.00
1944 798.50 644.00 596.00 426.00 271.50 132.50 22.00 35.00 78.50 236.50 593.00 824.00 4657.50
1945 710.00 572.00 635.50 460.50 221.50 135.00 23.50 14.50 158.00 361.50 577.50 742.50 4612.00
1946 767.00 627.00 585.00 442.00 204.00 158.50 31.50 16.50 153.50 459.50 644.50 724.50 4813.50
1947 868.00 546.50 495.50 349.50 158.50 136.00 22.00 45.50 100.00 329.50 549.50 710.50 4311.00
1948 790.50 707.00 650.50 523.50 305.00 63.50 49.60 a 33.50 167.50 412.00 655.50 853.02 a 5211.12
1949 1101.50 679.50 562.13 a 367.50 200.50 109.50 37.00 26.00 94.00 506.50 475.50 770.00 4929.63
1950 1097.00 664.00 626.50 498.00 304.00 118.50 17.00 19.00 132.00 408.50 547.00 545.50 4977.00
1951 781.00 612.50 746.50 374.50 286.50 88.00 23.00 57.50 102.00 369.00 593.00 851.00 4884.50
1952 823.00 708.50 646.50 438.00 299.50 174.00 28.00 44.50 94.50 240.00 792.00 743.50 5032.00
1953 560.00 616.00 624.50 476.00 343.00 225.50 56.00 48.00 97.50 336.50 521.00 697.50 4601.50
1954 770.00 620.00 685.00 485.00 292.50 240.00 80.00 72.00 181.00 424.50 480.00 772.50 5102.50
1955 801.50 699.50 732.00 593.50 372.50 178.50 101.50 59.00 178.50 365.50 660.00 740.50 5482.50
1956 741.50 813.50 654.50 411.50 221.50 205.00 36.50 52.00 108.50 414.50 679.00 774.00 5112.00
1957 994.00 625.00 561.50 399.00 209.00 109.50 43.00 50.00 49.50 365.50 664.50 681.00 4751.50
1958 686.50 468.50 621.00 443.50 148.00 72.00 1.00 2.00 116.00 303.50 543.50 604.00 4009.50
1959 689.50 619.50 589.50 426.50 341.00 123.50 35.50 33.50 152.50 331.00 623.50 787.50 4753.00
1960 880.50 679.50 640.50 463.50 389.00 141.00 35.00 63.00 112.00 316.50 544.50 772.50 5037.50
1961 683.50 529.50 578.50 478.50 343.00 117.00 28.50 11.50 205.00 387.50 713.00 745.00 4820.50
1962 866.00 679.50 654.50 425.00 422.50 177.00 94.00 52.00 90.50 384.00 548.50 721.00 5114.50
1963 970.50 483.50 639.50 539.00 311.00 190.50 107.00 39.00 46.50 349.00 568.00 779.50 5023.00
1964 724.50 717.00 663.00 509.00 353.50 142.50 44.00 84.00 189.00 366.00 692.00 789.50 5274.00
1965 760.00 615.00 570.00 440.50 398.50 193.50 48.50 28.00 171.50 301.50 512.50 842.50 4882.00
1966 788.00 685.00 634.00 434.00 316.00 122.50 47.50 25.00 79.50 384.50 536.50 645.50 4698.00
1967 648.00 627.50 679.50 612.50 330.50 79.50 11.50 2.50 52.00 332.00 557.00 714.50 4647.00
1968 786.50 490.00 549.00 544.50 325.50 174.00 48.50 52.50 148.50 421.00 590.00 868.00 4998.00
1969 993.50 691.00 581.50 477.50 200.50 52.00 49.50 74.00 142.50 469.50 628.00 715.50 5075.00
1970 724.50 562.00 606.00 577.00 337.50 97.50 36.00 48.50 201.00 446.00 642.50 806.00 5084.50
1971 804.00 716.50 715.50 536.50 363.00 209.00 62.50 19.00 177.50 447.00 615.00 791.50 5457.00
1972 829.00 632.50 531.50 572.00 272.50 155.50 35.50 44.50 243.50 462.00 559.50 926.50 5264.50
1973 811.00 592.50 632.00 477.00 293.00 148.00 34.00 88.00 114.50 406.00 631.50 670.50 4898.00
1974 851.50 666.00 586.50 470.50 377.00 126.50 51.00 30.50 52.00 372.00 558.00 682.00 4823.50
1975 695.00 647.50 665.00 590.50 334.50 169.50 39.50 89.50 83.00 416.00 633.00 715.50 5078.50
1976 754.50 719.00 698.50 536.00 364.50 250.00 47.50 69.00 104.50 403.00 573.00 814.50 5334.00
1977 848.50 575.50 637.00 432.50 410.00 114.00 63.00 24.50 185.50 401.50 613.00 677.00 4982.00
1978 732.50 553.00 522.50 483.50 323.00 53.00 17.50 21.50 134.50 337.00 769.50 938.00 4885.50
1979 1047.50 626.00 496.00 437.00 255.50 125.50 26.50 23.50 81.50 322.00 698.50 627.50 4767.00
1980 913.50 634.00 634.00 430.00 350.50 224.50 54.00 88.50 91.50 362.50 531.50 687.00 5001.50
1981 756.50 613.00 573.00 434.00 324.50 181.50 64.00 36.50 128.50 453.50 614.00 685.00 4864.00
1982 820.50 656.50 636.00 575.00 324.50 86.00 45.50 32.00 134.00 362.00 680.00 741.00 5093.00
1983 675.00 531.00 498.50 447.00 259.00 145.50 63.00 3.00 142.50 382.50 471.00 825.00 4443.00
1984 676.00 604.00 507.50 517.50 376.00 238.50 48.50 14.50 129.00 426.50 618.00 855.00 5011.00
1985 953.50 711.50 690.00 409.00 307.00 137.50 5.50 56.00 201.00 428.50 831.50 985.00 5716.00
1986 676.00 578.50 460.50 499.50 330.50 86.00 70.00 4.00 215.50 352.00 551.00 788.00 4611.50
1987 791.00 593.00 550.00 393.00 242.00 92.00 59.50 19.00 97.00 280.00 543.00 810.50 4470.00
1988 795.50 628.50 602.00 417.00 352.50 149.00 49.50 45.50 128.00 268.50 545.50 759.00 4740.50
1989 725.00 847.50 577.50 313.00 275.00 95.50 47.00 45.50 86.50 373.50 529.50 788.50 4704.00
1990 689.50 664.50 533.50 368.00 304.00 110.50 16.00 18.00 48.00 428.00 544.00 947.50 4671.50
1991 790.50 458.50 632.00 474.50 369.50 214.50 13.00 33.50 63.00 334.50 531.50 725.50 4640.50
1992 648.00 505.50 449.00 336.50 157.50 58.50 13.00 24.00 112.50 308.50 566.50 800.00 3979.50
1993 889.00 717.50 492.50 382.00 156.00 123.50 65.50 35.50 98.50 264.00 735.50 742.50 4702.00
1994 642.50 617.50 459.50 354.00 187.00 119.00 23.50 7.50 52.50 385.00 699.50 705.50 4253.00
1995 637.50 518.50 545.00 452.00 195.00 123.50 22.00 47.00 50.00 392.50 418.00 706.00 4107.00
1996 715.50 662.00 551.00 394.50 368.00 130.00 25.50 29.50 158.00 393.50 594.50 699.00 4721.00
1997 746.50 635.50 577.00 467.00 168.00 139.00 18.50 0.50 68.00 403.50 510.00 790.50 4524.00
1998 652.50 547.00 550.00 440.00 326.50 117.00 11.50 11.00 81.50 392.00 519.00 778.00 4426.00
1999 721.00 614.00 631.00 470.00 365.50 175.00 49.00 27.50 101.50 344.00 469.50 696.50 4664.50
2000 771.00 608.50 644.00 411.50 287.00 93.50 39.00 49.00 120.00 365.50 712.00 759.00 4860.00
2001 757.50 650.00 568.00 514.50 255.50 199.50 30.50 19.50 86.00 386.00 522.50 739.00 4728.50
2002 742.00 610.00 659.00 438.00 341.00 129.00 14.50 43.00 88.50 400.00 559.00 678.00 4702.00
2003 622.50 599.50 496.00 465.00 293.50 95.00 7.00 5.00 73.00 258.00 639.00 722.50 4276.00
2004 790.00 621.00 491.50 374.00 256.00 96.50 12.00 4.50 133.50 333.50 636.00 698.50 4447.00
2005 718.50 662.00 507.50 444.00 235.50 166.00 13.50 8.00 146.00 335.00 676.00 781.00 4693.00
2006 639.00 660.50 634.00 423.00 263.00 82.00 18.50 28.00 88.50 403.50 543.50 788.00 4571.50
2007 835.00 579.50 496.50 455.50 266.50 137.50 1.50 13.50 140.00 418.50 641.00 771.50 4756.50
2008 865.50 635.50 673.50 557.50 280.00 212.00 16.00 41.00 96.00 410.50 516.00 866.00 5169.50
2009 786.00 669.50 646.50 467.00 258.50 61.00 20.00 25.00 70.00 361.50 544.00 861.00 4770.00
2010 581.50 524.00 551.00 459.00 329.50 158.50 39.00 38.00 80.50 324.50 588.00 655.00 4328.50
2011 705.00 673.50 557.00 526.00 355.00 141.50 25.00 10.50 50.50 325.50 599.00 814.00 4782.50
2012 714.55 a 647.50 653.50 405.00 289.00 168.00 27.50 11.00 70.50 305.50 500.00 695.00 4487.05
2013 860.50 592.00 530.00 8.50 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 1982.50
Period of Record Statistics
MEAN 785.27 628.59 584.29 438.50 286.99 135.07 37.21 33.51 124.39 362.32 591.30 751.33 4764.95
S.D. 113.93 77.59 74.76 72.37 67.19 47.00 24.29 22.67 49.11 63.02 80.19 83.30 349.73
SKEW 0.93 0.30 -0.44 -0.19 -0.24 0.10 0.76 0.90 0.48 0.32 0.34 0.14 -0.09
MAX 1164.50 852.91 746.50 612.50 422.50 250.00 107.00 116.50 260.00 590.55 831.50 985.00 5716.00
MIN 560.00 458.50 394.50 186.50 148.00 30.00 1.00 0.00 35.50 177.50 418.00 530.00 3754.00
NO YRS 117 118 118 119 118 120 117 114 116 118 116 117 106