BONNEVILLE DAM, OREGON

Monthly Total Heating Degree Days

(350897)

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 56.00 41.50 165.00 367.50 653.50 933.00 2216.50
1949 1237.93 a 786.00 641.00 364.00 210.00 128.00 63.50 40.50 89.50 517.50 479.50 760.50 5317.93
1950 1273.50 885.00 697.50 499.00 340.00 143.50 40.00 22.00 103.50 409.00 622.00 710.50 5745.50
1951 858.00 720.50 768.00 349.50 293.00 131.00 27.50 55.50 84.00 357.50 620.00 847.00 5111.50
1952 1028.00 739.50 683.55 a 385.50 257.00 173.00 30.00 27.50 66.50 147.50 731.00 832.50 5101.55
1953 624.50 598.00 605.00 464.50 348.50 199.00 29.00 45.00 93.50 302.00 464.50 669.50 4443.00
1954 887.00 688.00 676.50 451.50 255.50 203.00 87.50 58.00 112.50 398.00 464.50 836.00 5118.00
1955 841.50 720.50 779.50 581.50 359.00 172.00 111.00 39.50 163.00 344.00 781.50 867.00 5760.00
1956 869.50 940.00 674.50 391.61 b 211.50 168.50 31.50 52.00 104.50 393.50 684.50 761.00 5282.61
1957 1200.00 741.00 659.50 408.50 193.50 85.00 36.50 25.50 30.50 391.00 632.00 713.50 5116.50
1958 739.00 524.00 656.00 443.50 133.00 73.00 7.50 11.00 104.00 277.50 601.50 718.50 4288.50
1959 829.50 709.50 617.50 399.50 327.00 108.00 38.00 44.50 168.50 352.00 665.50 785.50 5045.00
1960 1032.00 692.50 681.50 453.00 338.13 d 105.00 22.00 74.50 125.50 317.00 584.50 865.50 5291.13
1961 758.50 571.00 613.50 459.50 303.00 78.50 18.50 7.00 155.50 385.50 705.52 a 790.50 4846.52
1962 840.50 674.59 a 702.00 362.50 397.50 122.00 61.50 28.50 84.00 322.00 537.00 725.50 4857.59
1963 955.00 618.50 609.50 527.00 281.50 167.50 73.00 19.50 41.00 289.50 546.50 852.50 4981.00
1964 731.50 670.00 647.50 510.50 345.00 172.00 53.00 81.00 138.00 292.50 671.00 886.50 5198.50
1965 792.50 622.50 576.00 392.00 335.00 158.50 30.50 24.50 k 159.00 243.00 492.41 a 826.00 4627.41
1966 637.50 g 694.50 658.50 393.00 301.50 133.45 a 55.50 26.00 69.50 354.00 536.50 725.00 3947.45
1967 665.00 585.00 656.50 514.00 259.00 66.00 1.00 1.00 21.50 297.50 546.50 805.50 4418.50
1968 840.50 562.00 505.50 470.00 266.00 133.00 27.50 81.50 115.50 392.00 574.50 876.00 4844.00
1969 1090.00 741.50 573.00 428.50 222.50 67.00 32.50 50.00 117.00 396.50 533.00 767.00 5018.50
1970 880.00 562.00 603.00 535.50 283.00 102.50 29.00 18.50 168.50 399.00 603.00 826.00 5010.00
1971 777.50 617.50 741.00 500.00 279.00 219.50 58.00 13.00 154.00 436.00 628.00 819.00 5242.50
1972 835.00 717.50 549.00 570.50 243.50 130.00 22.00 19.00 214.00 375.00 557.00 960.50 5193.00
1973 907.00 639.00 610.00 421.00 250.50 139.50 37.00 64.50 105.50 348.00 661.50 681.50 4865.00
1974 922.50 630.00 618.00 458.50 337.00 106.00 64.00 38.00 53.50 280.50 560.00 691.50 4759.50
1975 805.50 747.50 692.00 578.00 283.50 164.00 42.00 65.50 55.50 357.50 591.50 724.00 5106.50
1976 727.50 701.00 678.00 483.00 262.00 202.00 31.50 69.00 70.00 304.00 502.00 738.50 4768.50
1977 980.50 614.50 626.50 366.00 375.50 68.50 40.00 23.50 163.50 313.50 642.50 721.50 4936.00
1978 843.00 620.00 519.00 436.50 315.00 75.00 35.00 45.50 153.50 258.00 719.50 845.50 4865.50
1979 1212.00 744.00 525.50 427.00 207.50 89.50 23.50 17.00 45.00 256.50 652.50 712.00 4912.00
1980 1000.94 e 760.00 629.00 358.50 261.50 170.50 25.50 56.50 108.50 296.22 d 535.50 693.00 4895.66
1981 691.00 628.96 a 497.00 429.50 262.50 153.00 47.53 a 15.50 108.50 368.50 499.50 725.00 4426.50
1982 796.50 665.00 592.00 500.00 272.00 97.00 44.50 27.50 119.00 356.50 657.00 763.50 4890.50
1983 688.00 593.50 489.50 401.50 226.50 132.50 55.00 15.00 142.00 326.50 511.50 1031.50 4613.00
1984 807.50 655.00 513.00 477.00 334.00 180.50 16.50 9.50 135.00 420.50 599.00 861.00 5008.50
1985 945.50 747.50 635.00 375.00 240.00 97.00 8.50 37.00 162.00 353.00 860.00 1115.50 5576.00
1986 782.00 632.07 a 453.00 436.50 278.50 58.00 49.00 2.00 172.50 228.50 513.50 832.50 4438.07
1987 853.00 580.00 540.00 310.00 200.00 79.50 39.50 18.00 62.59 a 179.50 466.50 800.50 4129.09
1988 867.00 621.50 547.00 374.50 274.00 124.00 41.00 13.00 88.50 168.50 522.50 744.00 4385.50
1989 704.50 906.50 649.50 307.50 236.00 69.50 32.50 23.50 39.00 294.50 479.50 747.50 4490.00
1990 662.00 687.50 514.50 320.50 268.50 111.00 13.00 6.00 20.00 356.00 478.50 949.50 4387.00
1991 859.50 501.50 625.50 448.50 337.00 186.50 5.50 17.50 33.00 263.50 553.00 706.00 4537.00
1992 673.50 540.50 405.00 329.50 121.00 44.00 9.50 11.50 90.00 253.00 556.50 818.00 3852.00
1993 1012.50 774.00 659.00 436.00 164.00 127.00 61.50 26.50 51.50 193.00 725.50 766.50 4997.00
1994 667.50 753.50 512.00 347.00 186.50 122.00 23.50 1.00 39.50 290.50 688.50 765.50 4397.00
1995 817.50 559.50 557.50 415.50 173.00 131.50 8.00 38.50 34.00 318.50 428.00 785.50 4267.00
1996 790.50 807.00 589.00 383.00 339.45 a 129.00 26.50 32.00 142.50 335.00 599.50 800.50 4973.95
1997 844.23 a 628.00 0.00 z 445.50 155.50 96.50 12.00 4.00 60.00 342.50 517.50 769.00 3874.73
1998 788.50 577.50 544.50 404.50 296.50 93.00 13.00 15.00 45.00 317.00 500.50 775.50 4370.50
1999 677.00 618.50 590.50 452.00 339.50 165.00 51.00 15.50 81.50 274.00 476.00 673.50 4414.00
2000 794.00 653.54 a 612.00 337.50 249.03 a 90.00 a 29.50 25.50 79.00 305.00 705.52 a 856.50 4737.09
2001 801.87 a 678.50 526.43 d 460.50 235.00 160.00 34.00 10.50 55.00 333.50 524.50 753.00 4572.79
2002 757.00 599.00 650.00 404.50 281.50 90.00 a 15.00 18.50 66.50 313.00 544.00 771.00 4510.00
2003 671.50 599.50 541.50 428.50 264.00 73.00 10.00 4.50 73.50 237.00 656.50 783.00 4342.50
2004 920.50 649.50 430.50 294.00 212.50 84.00 2.50 14.00 106.00 284.00 527.00 683.00 4207.50
2005 802.50 611.00 461.00 402.50 187.00 118.50 7.50 6.50 122.50 275.00 605.50 863.50 4463.00
2006 637.00 674.50 594.00 365.50 202.65 d 69.11 b 10.00 l 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2542.76
Period of Record Statistics
MEAN 847.32 668.62 600.03 425.34 265.71 123.02 34.42 29.29 98.82 319.95 585.79 794.97 4802.32
S.D. 150.50 90.24 81.13 67.29 62.08 42.78 21.71 21.23 46.98 68.39 89.90 87.59 407.61
SKEW 1.04 0.82 -0.19 0.30 -0.18 0.28 0.95 0.82 0.23 -0.12 0.63 1.22 0.15
MAX 1273.50 940.00 779.50 581.50 397.50 219.50 111.00 81.50 214.00 517.50 860.00 1115.50 5760.00
MIN 624.50 501.50 405.00 294.00 121.00 44.00 1.00 1.00 20.00 147.50 428.00 669.50 3852.00
NO YRS 57 58 57 58 58 58 58 57 58 58 58 58 54