TROUTDALE SUBSTATION, OREGON

Monthly Total Heating Degree Days

(358634)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 47.50 37.20 a 171.50 381.00 661.00 866.50 2164.70
1949 1152.50 716.50 582.80 a 380.00 193.00 133.50 50.50 29.00 100.00 503.50 400.00 753.82 a 4995.12
1950 1219.00 754.00 636.00 486.21 a 326.50 129.00 30.50 20.50 135.50 396.80 a 554.50 612.50 5301.01
1951 803.00 638.00 713.00 314.50 240.50 87.00 32.00 44.50 86.00 362.00 586.50 837.50 4744.50
1952 921.00 694.45 a 650.50 396.50 257.00 163.00 34.00 32.55 a 73.97 a 153.50 669.00 734.00 4779.46
1953 532.68 a 594.00 592.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 453.10 a 652.00 2823.79
1954 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
1955 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
1956 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
1957 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
1958 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
1959 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 31.50 f 162.50 332.00 623.79 a 745.50 1863.79
1960 976.00 656.26 b 646.00 420.00 349.27 a 119.50 37.00 76.00 151.00 322.50 560.50 620.00 f 4314.03
1961 681.48 a 513.50 552.50 454.50 274.35 a 73.89 c 21.00 12.92 a 176.00 384.00 668.00 755.88 a 4568.02
1962 819.50 654.50 647.00 354.50 366.00 134.00 65.58 e 27.50 89.50 320.50 485.00 685.00 4648.58
1963 939.50 511.00 573.50 485.50 283.50 166.00 37.50 r 35.00 68.00 296.50 515.50 773.00 4647.00
1964 710.50 660.00 612.00 500.00 370.00 174.00 50.50 g 76.93 d 157.00 282.00 654.50 822.50 5019.43
1965 755.00 597.00 487.50 381.00 326.00 125.17 a 29.34 c 23.00 118.00 232.50 b 441.00 774.00 4289.51
1966 721.50 611.00 561.00 340.00 235.00 127.00 45.50 29.00 81.00 365.50 520.00 626.50 4263.00
1967 588.00 563.00 609.50 491.50 239.98 b 49.50 3.00 1.00 23.50 280.50 508.00 736.50 4093.98
1968 761.00 475.50 457.50 450.00 245.50 101.50 23.00 36.50 104.48 a 343.67 b 525.00 616.50 f 3523.66
1969 1035.83 b 677.00 511.00 387.50 176.50 48.50 26.50 35.00 94.50 367.87 a 506.50 696.00 4562.69
1970 791.00 503.00 550.00 492.00 269.70 a 79.50 21.00 20.50 154.00 379.00 521.00 771.50 4552.20
1971 741.50 582.50 667.50 452.50 246.50 184.50 48.50 6.50 138.00 395.50 574.00 761.50 4799.00
1972 823.50 654.05 a 501.50 523.00 210.50 91.50 18.00 22.22 a 212.31 d 379.00 508.97 a 884.00 4828.54
1973 815.50 589.50 528.00 385.50 213.26 b 115.00 29.50 65.50 88.39 b 344.62 a 631.00 613.00 4418.77
1974 863.50 612.00 561.00 408.00 305.35 a 81.00 47.02 a 21.00 41.25 b 290.00 492.41 a 614.50 4337.03
1975 708.00 667.00 604.50 c 519.00 233.00 126.50 35.50 59.00 56.50 332.50 560.50 679.50 4581.50
1976 676.00 606.93 a 619.00 417.00 236.50 156.00 20.50 50.00 67.50 313.50 468.00 735.50 4366.43
1977 869.50 553.50 567.00 342.00 330.00 57.50 47.50 19.00 132.50 300.00 639.50 674.50 4532.50
1978 786.00 532.00 483.50 389.00 0.00 z 54.00 36.50 30.50 125.50 242.50 719.50 838.00 4237.00
1979 1125.50 672.50 475.00 391.50 205.00 68.00 19.50 18.00 49.00 240.50 600.50 657.50 4522.50
1980 925.87 a 667.00 574.50 328.00 209.00 g 110.50 f 23.54 d 56.63 e 105.00 e 265.50 f 408.00 f 530.50 g 2680.54
1981 627.15 e 592.87 e 469.02 d 333.00 f 183.00 h 111.92 d 38.15 e 8.00 g 81.00 f 356.50 e 360.50 f 537.00 f 2195.62
1982 805.00 620.00 562.50 459.50 242.50 89.00 48.00 30.00 105.00 312.50 609.00 747.00 4630.00
1983 679.42 a 527.00 458.50 386.38 a 84.50 m 139.50 51.50 12.50 132.41 a 362.91 b 456.50 943.43 a 4150.06
1984 729.00 597.50 437.00 437.50 282.00 157.76 a 20.00 9.00 118.50 396.28 a 550.50 842.50 4577.54
1985 924.83 a 709.00 622.00 386.50 240.50 107.50 7.00 31.00 169.50 384.00 820.34 a 1029.95 b 5432.13
1986 752.00 252.50 o 268.00 k 429.00 198.50 m 47.59 a 26.50 m 0.00 j 167.00 207.00 i 541.00 805.50 2742.09
1987 813.50 556.00 522.35 a 305.00 186.00 67.00 40.50 13.00 83.28 a 241.00 476.50 817.00 4121.13
1988 823.00 608.50 538.88 a 386.00 271.00 138.50 29.00 48.00 122.50 221.50 505.50 698.50 4390.88
1989 693.00 856.50 610.00 284.00 222.50 61.50 75.50 0.00 z 123.00 378.50 458.08 d 744.50 4507.08
1990 615.00 624.00 453.00 309.11 b 264.00 88.50 20.00 6.00 20.50 358.50 482.50 928.50 4169.61
1991 779.13 a 0.00 z 578.00 391.00 322.50 185.00 11.00 16.00 37.50 286.50 528.50 712.50 3847.63
1992 651.00 476.50 396.00 285.50 126.00 44.50 8.50 6.00 j 124.50 308.00 575.00 856.50 3852.00
1993 934.00 703.50 537.50 372.50 130.00 96.00 37.50 19.50 67.50 218.00 743.50 766.00 4625.50
1994 634.50 689.50 435.50 316.00 143.50 105.00 17.00 2.50 28.50 342.50 683.50 733.00 4131.00
1995 736.50 477.56 a 489.50 397.50 147.00 90.00 7.50 32.00 0.00 z 301.50 438.50 359.50 n 3117.56
1996 460.00 l 459.00 j 324.50 k 254.50 i 180.50 o 56.50 k 14.00 p 17.50 l 67.00 q 207.50 k 401.50 k 428.50 n 0.00
1997 481.00 l 319.50 m 279.00 q 273.50 k 81.50 j 33.50 m 16.00 q 4.50 n 27.00 o 249.50 k 306.00 m 469.50 k 0.00
1998 381.00 o 382.50 i 313.50 l 264.50 i 169.50 m 69.00 k 1.50 l 0.50 q 15.50 s 161.00 m 263.50 m 325.50 q 0.00
1999 370.50 n 255.50 p 273.00 q 217.00 p 88.00 v 92.00 m 18.50 m 2.00 s 2.00 z 326.00 449.50 621.50 1397.00
2000 770.00 621.50 591.00 336.00 219.50 97.00 31.00 31.50 88.50 317.00 680.00 775.52 a 4558.52
2001 755.00 655.50 529.50 451.00 232.00 148.00 27.00 15.50 80.50 378.00 513.50 705.00 4490.50
2002 729.50 555.50 606.50 373.50 295.50 98.40 e 31.00 25.50 80.00 342.00 634.50 681.00 4452.90
2003 632.50 607.50 510.00 421.00 272.50 86.50 8.00 10.00 75.60 e 217.00 628.50 774.00 4243.10
2004 907.00 663.00 448.00 302.50 185.00 75.50 8.50 16.00 s 88.00 m 320.00 592.50 0.00 z 3502.00
2005 0.00 z 663.50 511.50 422.00 227.00 177.00 20.00 25.00 180.00 335.50 669.50 879.00 4110.00
2006 683.00 705.50 639.00 422.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2450.00
Period of Record Statistics
MEAN 796.09 618.83 551.25 399.20 247.36 107.93 30.21 28.87 105.93 324.36 564.25 758.22 4548.62
S.D. 145.53 77.91 71.93 63.09 60.70 40.03 16.01 18.36 46.15 62.66 91.59 93.98 310.18
SKEW 0.93 0.26 -0.06 0.06 0.03 0.27 0.54 0.94 0.12 -0.25 0.52 0.59 0.99
MAX 1219.00 856.50 713.00 523.00 370.00 185.00 75.50 76.93 212.31 503.50 820.34 1029.95 5432.13
MIN 532.68 475.50 396.00 284.00 126.00 44.50 3.00 1.00 20.50 153.50 400.00 612.50 4093.98
NO YRS 47 46 47 46 41 45 44 42 45 47 48 44 31