PORTLAND WSFO, OREGON

Monthly Total Heating Degree Days

(356751)

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
1941 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 509.00 686.00 1195.00
1942 920.00 623.50 578.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 604.00 682.00 3407.50
1943 984.50 602.50 606.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 567.50 776.00 3536.50
1944 801.00 661.00 609.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 592.50 795.50 3459.00
1945 700.50 578.00 615.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 594.00 781.00 3268.50
1946 747.00 625.00 572.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 655.50 717.50 3317.00
1947 862.00 554.00 488.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 539.00 685.00 3128.00
1948 790.00 702.00 628.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 142.00 365.28 a 638.00 835.50 4100.78
1949 1155.00 725.50 600.00 378.00 190.50 113.00 46.00 29.00 100.00 510.50 454.50 731.50 5033.50
1950 1178.50 734.00 618.50 493.50 325.50 121.50 23.00 18.50 127.00 391.50 557.50 577.00 5166.00
1951 782.00 619.50 717.00 346.50 260.50 68.50 22.00 46.00 92.00 351.50 578.00 852.00 4735.50
1952 910.50 676.50 609.50 378.50 237.50 150.00 19.50 17.00 69.50 204.00 730.50 725.00 4728.00
1953 548.50 593.50 594.00 453.50 334.00 194.00 35.00 43.50 96.00 332.00 492.00 660.50 4376.50
1954 806.00 630.00 656.50 464.00 258.00 213.00 70.50 63.50 148.50 370.50 460.50 747.50 4888.50
1955 783.50 688.50 728.50 556.00 376.50 158.00 82.50 38.50 177.50 354.50 708.50 799.00 5451.50
1956 777.50 845.50 646.00 370.50 206.50 181.50 27.50 49.50 127.50 412.00 672.00 755.00 5071.00
1957 1048.83 a 658.50 585.00 400.50 196.50 101.00 29.50 37.00 48.00 377.50 631.00 654.50 4767.83
1958 664.00 459.50 606.00 425.00 133.50 68.00 3.50 5.50 110.00 304.50 587.00 664.50 4031.00
1959 764.50 625.50 565.50 382.50 288.00 94.00 28.00 35.00 149.50 334.50 666.50 788.50 4722.00
1960 919.50 659.50 621.50 431.00 343.00 82.50 21.00 56.50 120.50 326.00 556.00 816.50 4953.50
1961 663.50 492.15 b 538.00 449.00 268.50 68.00 12.00 4.50 175.00 366.50 662.50 748.00 4447.65
1962 818.50 618.00 612.50 373.50 345.00 124.00 54.00 27.00 77.00 305.50 524.00 695.50 4574.50
1963 932.50 483.00 613.50 493.50 278.50 173.50 77.00 26.50 46.00 335.00 569.50 838.50 4867.00
1964 747.50 723.50 656.00 548.00 387.00 189.50 70.50 86.50 197.00 365.50 719.00 867.50 5557.50
1965 769.50 605.00 541.00 396.50 333.00 117.50 24.50 16.50 144.00 235.50 460.00 792.50 4435.50
1966 766.50 624.00 553.00 432.50 255.00 106.50 29.50 18.00 59.00 352.00 537.50 644.50 4378.00
1967 664.00 598.00 653.00 543.00 252.00 54.00 4.00 0.50 31.50 316.00 565.50 764.50 4446.00
1968 796.00 489.50 522.50 509.50 269.50 115.00 20.50 46.00 130.00 402.00 554.00 859.00 4713.50
1969 1027.00 709.50 573.00 449.00 184.50 53.50 19.50 26.50 89.50 364.50 534.00 686.50 4717.00
1970 757.50 532.50 560.50 500.50 254.50 75.50 15.00 16.00 135.50 375.00 536.50 777.50 4536.50
1971 763.00 622.00 660.50 462.50 261.50 157.00 34.50 5.50 131.00 394.50 586.50 764.50 4843.00
1972 801.50 615.50 473.50 509.50 177.50 66.50 10.50 6.50 157.50 372.00 503.50 856.00 4550.00
1973 808.00 563.50 531.50 383.50 207.00 94.50 8.00 51.00 61.50 332.00 626.00 630.50 4297.00
1974 838.00 617.00 553.00 411.00 289.00 76.50 36.00 17.50 29.50 305.50 507.00 647.50 4327.50
1975 730.50 667.00 622.00 530.00 245.00 131.50 25.00 43.50 51.00 359.50 572.50 692.50 4670.00
1976 706.00 664.00 640.00 443.50 264.00 161.00 17.00 45.50 52.00 326.00 542.50 791.50 4653.00
1977 909.50 571.50 605.50 364.50 348.50 71.50 43.00 21.50 137.50 348.00 652.50 712.50 4786.00
1978 773.50 569.00 492.00 437.00 324.50 61.00 30.50 30.50 139.50 319.50 778.50 922.50 4878.00
1979 1063.50 620.50 442.50 359.50 167.50 62.00 8.50 4.00 21.50 219.50 599.00 639.50 4207.50
1980 927.50 653.50 581.50 335.50 237.50 131.50 17.00 28.50 69.00 289.50 494.50 651.00 4416.50
1981 656.00 589.50 502.00 378.50 236.50 113.00 25.00 6.50 81.00 363.00 486.00 693.00 4130.00
1982 787.00 602.00 512.50 480.50 234.50 75.50 24.00 12.00 102.50 314.50 619.50 722.00 4486.50
1983 640.50 497.50 443.00 369.00 189.00 89.00 29.50 2.50 113.50 333.50 471.00 888.50 4066.50
1984 707.50 554.50 431.50 439.00 276.50 118.00 9.50 2.00 84.50 383.50 550.00 828.00 4384.50
1985 897.50 671.00 596.50 334.50 219.00 68.00 0.50 7.50 130.00 380.00 833.50 991.00 5129.00
1986 698.50 599.00 426.50 444.00 268.00 46.50 40.00 0.00 153.00 249.00 519.50 759.00 4203.00
1987 787.50 555.00 505.00 328.50 179.50 54.00 24.50 3.00 57.50 221.50 487.00 805.50 4008.50
1988 806.00 589.00 552.00 385.50 277.00 114.00 35.00 17.50 93.50 214.50 526.50 714.00 4324.50
1989 705.50 812.00 602.50 270.50 227.00 81.50 35.50 29.50 48.00 315.00 493.50 766.50 4387.00
1990 672.00 647.50 485.00 316.50 259.00 84.50 11.00 6.00 16.50 346.50 499.00 940.50 4284.00
1991 809.50 453.50 583.50 427.50 319.50 161.00 5.00 15.50 28.00 300.50 524.00 691.50 4319.00
1992 635.50 490.50 394.50 288.50 112.50 38.00 6.00 10.00 111.50 283.00 562.50 796.50 3729.00
1993 884.00 699.50 530.00 373.50 141.00 97.50 41.50 18.00 59.00 239.00 705.50 733.00 4521.50
1994 637.50 676.50 458.50 324.50 148.50 91.00 16.00 0.00 25.50 337.00 670.00 704.50 4089.50
1995 672.00 519.50 518.00 412.50 154.00 98.50 4.00 16.50 23.50 324.50 400.00 700.00 3843.00
1996 755.50 678.50 538.50 346.00 303.50 76.00 16.50 10.50 118.00 349.50 587.50 724.50 4504.50
1997 744.50 619.00 568.00 419.50 121.50 85.00 8.50 0.00 44.50 350.50 456.50 741.50 4159.00
1998 683.50 530.00 504.50 381.00 276.00 76.50 14.00 4.50 34.50 331.00 482.00 759.50 4077.00
1999 687.50 597.00 595.50 430.50 321.00 153.50 40.00 18.00 77.00 306.50 446.50 655.00 4328.00
2000 780.50 618.50 601.50 329.50 234.00 58.45 a 21.00 15.00 79.00 302.25 a 667.00 764.50 4471.20
2001 740.00 645.50 526.50 462.00 219.67 b 144.50 25.00 7.00 60.00 a 355.50 511.00 715.00 4411.67
2002 739.00 577.50 624.50 382.50 290.00 76.50 9.50 11.00 63.00 337.00 523.00 670.00 4303.50
2003 628.00 580.00 493.93 a 426.00 253.00 73.00 1.50 1.00 43.50 225.00 593.00 698.00 4015.93
2004 823.00 573.00 427.00 266.00 158.00 64.00 2.00 3.50 79.00 273.00 575.50 675.00 3919.00
2005 721.00 602.00 466.00 382.00 176.00 111.50 5.00 4.00 99.50 270.50 628.50 782.50 4248.50
2006 605.00 644.00 586.50 357.50 192.00 40.50 6.50 12.00 67.00 340.50 529.50 775.50 4156.50
2007 834.00 582.00 461.50 400.00 220.50 96.50 0.00 7.50 121.50 368.50 605.50 746.50 4444.00
2008 812.50 583.50 606.50 495.00 228.50 151.50 8.50 19.00 62.00 355.00 473.50 854.00 4649.50
2009 773.50 662.50 611.00 381.50 184.00 30.00 8.00 12.50 47.50 320.50 518.50 910.50 4460.00
2010 618.50 516.00 519.50 421.50 309.00 152.50 40.50 28.50 59.00 307.50 601.50 695.50 4269.50
2011 722.50 691.00 586.00 512.50 338.50 114.50 16.00 3.00 39.00 294.50 602.50 803.50 4723.50
2012 749.50 627.00 619.00 364.00 228.00 135.00 15.00 3.50 43.50 276.00 480.50 685.00 4226.00
2013 838.50 568.50 495.00 7.50 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 1902.00
Period of Record Statistics
MEAN 786.94 613.23 561.68 411.58 246.78 103.19 23.58 19.82 87.81 327.48 568.72 751.41 4492.18
S.D. 122.09 74.08 70.46 67.14 64.53 42.34 18.53 18.14 44.59 53.95 82.93 80.58 365.71
SKEW 1.03 0.31 -0.24 0.15 0.01 0.57 1.29 1.29 0.38 -0.06 0.71 0.59 0.57
MAX 1178.50 845.50 728.50 556.00 387.00 213.00 82.50 86.50 197.00 510.50 833.50 991.00 5557.50
MIN 548.50 453.50 394.50 266.00 112.50 30.00 0.00 0.00 16.50 204.00 400.00 577.00 3729.00
NO YRS 72 72 72 64 64 64 64 64 65 65 72 72 64