PORTLAND WB CITY, OREGON

Monthly Total Heating Degree Days

(356749)

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
1973 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 69.00 80.50 333.00 629.50 622.50 1734.50
1974 836.00 623.00 555.00 410.00 304.50 83.00 40.50 25.50 26.00 263.50 497.50 651.00 4315.50
1975 719.00 660.00 611.50 519.00 235.50 151.00 34.50 66.00 45.50 352.00 566.50 661.00 4621.50
1976 670.00 649.00 614.00 406.50 232.50 153.50 20.50 47.00 50.00 280.00 468.00 735.00 4326.00
1977 820.00 512.00 608.00 302.50 337.00 55.00 52.00 27.00 120.50 286.50 611.50 0.00 z 3732.00
1978 707.00 496.00 403.00 391.61 b 268.00 45.00 22.00 27.90 a 120.00 231.50 696.00 851.00 4259.01
1979 1041.00 634.50 420.00 364.50 180.50 78.00 11.50 0.00 z 0.00 z 0.00 z 592.00 614.26 d 3936.26
1980 887.00 595.50 568.50 308.00 229.50 148.50 19.00 30.00 76.50 277.00 499.50 629.00 4268.00
1981 603.50 564.00 479.50 373.00 237.50 110.50 27.00 7.50 103.50 354.50 490.50 694.50 4045.50
1982 785.50 611.50 556.00 468.00 225.50 91.50 51.00 23.50 107.00 319.50 639.00 737.50 4615.50
1983 640.00 501.00 445.50 361.50 196.00 129.00 46.00 7.50 112.50 316.50 508.00 907.00 4170.50
1984 669.50 552.50 442.00 448.00 300.50 158.00 25.00 12.00 103.00 404.50 582.00 841.00 4538.00
1985 854.50 0.00 z 613.50 347.00 246.50 100.50 1.50 31.50 149.00 362.00 0.00 z 930.00 3636.00
1986 618.50 562.50 388.50 432.00 281.07 a 52.50 61.00 0.00 179.00 231.50 515.50 726.00 4048.07
1987 737.00 511.00 481.50 304.50 199.50 69.00 47.50 13.50 58.50 184.50 468.00 791.00 3865.50
1988 787.00 551.00 534.50 364.00 291.00 122.50 40.50 32.00 94.00 195.00 545.50 710.00 4267.00
1989 699.50 804.00 589.00 252.50 231.50 85.00 47.50 37.50 57.00 304.00 499.50 745.50 4352.50
1990 672.00 650.50 454.00 312.50 0.00 z 100.00 14.00 10.50 16.50 364.50 508.00 934.50 4037.00
1991 742.00 406.50 585.50 425.50 334.00 180.00 0.00 z 25.50 36.50 292.50 520.00 677.00 4225.00
1992 612.00 448.00 348.00 283.00 112.50 51.50 9.00 8.00 93.50 246.00 540.50 799.00 3551.00
1993 863.50 671.00 496.00 390.00 146.00 112.00 71.00 29.50 58.50 227.00 723.50 731.50 4519.50
1994 627.50 655.00 438.50 332.00 180.50 122.00 23.50 3.50 42.00 334.50 694.50 682.50 4136.00
1995 649.50 486.00 507.00 412.00 168.50 120.00 10.50 31.50 36.00 322.00 382.50 681.50 3807.00
1996 743.00 653.50 510.50 345.00 319.00 85.50 24.50 21.00 131.00 348.00 577.00 711.00 4469.00
1997 724.00 578.50 542.00 398.50 119.50 87.00 14.00 0.00 49.50 344.50 436.00 713.00 4006.50
1998 679.00 505.50 478.00 372.50 284.50 86.00 16.00 6.00 37.50 315.00 497.00 750.00 4027.00
1999 687.50 585.00 593.00 432.41 a 339.93 b 167.14 b 50.50 19.24 b 77.50 285.00 428.00 462.93 a 4128.16
2000 756.00 579.50 571.00 309.00 243.50 79.62 d 19.24 b 16.50 86.00 304.00 635.69 a 738.00 4338.05
2001 699.05 a 611.00 507.00 453.00 207.50 154.50 38.50 14.00 66.00 331.50 484.14 a 696.50 4262.69
2002 714.50 545.00 620.50 372.00 293.00 87.50 9.50 18.00 60.00 321.00 482.00 642.00 4165.00
2003 568.50 558.00 495.00 433.50 251.00 73.00 5.00 2.00 51.50 246.40 b 600.50 697.00 3981.40
2004 820.95 c 554.00 413.50 280.00 181.00 68.00 6.50 8.50 81.50 257.00 559.50 659.50 3889.95
2005 641.00 546.00 419.50 373.50 180.00 132.00 7.50 5.50 84.50 286.00 602.00 759.00 4036.50
2006 608.50 606.00 576.00 355.00 0.00 z 56.50 13.50 20.00 66.00 0.00 z 540.00 0.00 z 2841.50
2007 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
2008 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
2009 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 51.00 336.50 517.00 841.50 1746.00
2010 568.00 473.50 491.50 421.00 310.50 167.50 47.50 15.00 f 71.50 279.50 591.50 682.50 4104.50
2011 707.00 684.50 575.50 521.00 354.50 128.50 29.00 7.23 a 46.61 b 318.50 599.50 786.88 a 4758.72
2012 713.00 a 624.00 626.50 367.00 263.50 152.00 22.00 10.50 61.55 a 287.00 495.50 711.50 4334.05
2013 840.50 581.50 43.50 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 0.00 z 1422.00
Period of Record Statistics
MEAN 721.95 578.61 515.51 378.92 243.69 106.74 27.95 20.41 75.33 298.39 546.56 727.88 4210.45
S.D. 100.08 77.04 76.56 63.41 63.84 38.35 17.95 16.47 35.51 49.51 76.91 94.18 269.77
SKEW 0.90 0.29 -0.28 0.21 -0.18 0.20 0.53 1.28 0.84 -0.35 0.33 0.14 -0.14
MAX 1041.00 804.00 626.50 521.00 354.50 180.00 71.00 69.00 179.00 404.50 723.50 934.50 4758.72
MIN 568.00 406.50 348.00 252.50 112.50 45.00 1.50 0.00 16.50 184.50 382.50 462.93 3551.00
NO YRS 37 36 36 36 34 36 35 35 37 36 37 36 29