N WILLAMETTE EXP STN, OREGON

Monthly Total Heating Degree Days

(356151)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200708
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
1963 973.92 a 490.00 632.00 0.00 z 296.50 191.50 94.50 49.00 71.00 359.00 561.21 a 797.73 a 4516.36
1964 734.00 705.00 660.50 527.00 392.50 185.50 80.00 105.00 218.57 b 360.50 702.00 812.00 5482.57
1965 779.50 639.85 a 553.00 427.50 386.00 198.00 51.00 42.00 165.50 319.50 512.50 822.00 4896.35
1966 792.00 659.00 625.00 399.00 282.00 148.50 68.72 a 51.50 99.50 402.50 525.50 647.00 4700.22
1967 673.50 636.00 671.00 591.50 310.50 93.50 17.50 7.50 58.50 387.50 567.50 755.00 4769.50
1968 788.00 497.50 553.50 531.00 310.50 171.50 52.00 55.50 163.39 b 429.35 a 577.00 804.21 e 4933.45
1969 1001.00 712.88 c 581.00 473.00 238.38 b 54.11 b 60.97 a 106.78 d 136.55 a 461.00 578.57 b 715.58 a 5119.82
1970 750.72 a 568.50 616.38 a 565.00 324.00 120.00 48.50 54.50 245.50 463.00 576.00 795.50 5127.60
1971 802.00 673.50 709.38 a 525.50 324.00 243.50 73.00 19.24 b 208.00 488.50 649.00 816.85 a 5532.48
1972 844.50 668.00 550.00 581.50 267.50 136.00 33.00 32.50 230.00 426.50 576.50 918.50 5264.50
1973 834.50 599.00 618.21 e 460.00 274.00 163.50 41.50 107.00 117.00 416.00 639.50 658.00 4928.21
1974 908.96 c 670.50 606.50 476.00 373.00 127.76 a 73.00 44.00 51.00 367.50 567.00 686.00 4951.22
1975 709.50 672.00 661.69 b 580.00 324.00 176.50 43.00 89.50 86.50 397.50 619.14 a 705.50 5064.83
1976 743.00 697.04 a 665.00 493.00 300.50 235.00 62.50 89.50 102.93 a 395.52 b 579.00 856.50 5219.48
1977 872.00 599.00 686.00 408.00 403.50 114.00 59.50 35.00 171.50 372.50 647.78 c 654.10 a 5022.88
1978 735.70 c 541.50 505.00 456.50 354.50 82.22 c 48.71 c 47.00 178.00 339.00 766.50 938.86 c 4993.49
1979 1043.50 671.00 527.50 429.00 265.50 106.50 33.00 26.00 76.00 278.50 636.72 a 653.00 4746.22
1980 882.50 638.00 620.50 404.50 319.50 200.00 34.00 77.50 131.50 344.00 545.50 719.00 4916.50
1981 720.00 608.50 548.50 421.67 c 295.50 164.00 48.05 a 31.50 135.00 400.50 525.52 a 695.00 4593.73
1982 840.50 656.50 603.50 546.50 278.50 108.50 59.00 45.50 119.50 374.00 650.50 741.00 5023.50
1983 680.00 516.00 481.00 420.50 235.50 145.50 64.00 14.00 157.50 399.00 511.55 a 901.50 4526.05
1984 689.00 595.50 483.50 488.50 356.50 181.00 46.50 24.00 127.50 454.50 610.50 866.50 4923.50
1985 921.00 711.50 663.50 382.00 280.00 128.00 10.50 54.00 191.50 411.50 806.90 a 957.00 5517.40
1986 682.00 592.50 434.00 466.00 305.50 69.00 76.00 5.50 211.50 326.50 534.50 780.00 4483.00
1987 785.00 558.00 542.00 350.50 210.50 99.00 45.50 29.50 89.50 269.50 541.00 813.50 4333.50
1988 803.00 626.00 569.50 396.50 327.00 152.00 47.00 49.50 140.50 254.00 547.00 782.00 4694.00
1989 732.00 825.50 613.50 301.00 266.00 86.50 59.00 58.50 70.00 376.00 552.00 811.00 4751.00
1990 686.50 650.50 507.00 366.00 315.50 125.00 14.00 33.50 38.00 428.00 556.50 980.50 4701.00
1991 789.50 472.50 629.00 472.50 375.50 0.00 z 18.50 29.50 69.00 332.00 543.00 746.50 4477.50
1992 668.00 499.00 425.50 337.50 161.50 57.50 10.50 26.00 146.00 319.50 588.50 806.50 4046.00
1993 895.50 695.50 506.00 428.50 193.00 140.50 77.00 37.00 98.00 274.50 767.50 788.00 4901.00
1994 662.00 674.00 486.00 394.00 211.00 152.00 24.50 10.50 64.00 410.50 731.00 708.00 4527.50
1995 635.00 519.56 a 536.00 465.50 206.00 131.00 18.00 54.50 47.50 372.00 422.50 702.50 4110.06
1996 729.50 674.00 538.50 400.34 a 351.50 123.00 28.00 32.00 169.00 386.00 615.00 725.00 4771.84
1997 740.00 606.50 575.50 464.50 156.00 137.00 21.50 5.50 72.50 387.50 486.00 786.00 4438.50
1998 651.00 532.50 538.00 426.00 301.00 90.50 11.50 14.00 61.50 359.00 522.00 1038.00 h 3507.00
1999 499.50 f 592.00 606.50 441.50 369.50 186.00 56.50 34.00 107.00 340.00 467.50 672.00 3872.50
2000 744.50 615.50 625.00 378.00 268.00 86.00 31.00 46.50 0.00 z 346.00 670.50 746.00 4557.00
2001 727.00 626.00 537.50 631.00 226.50 175.00 31.50 26.50 72.50 382.00 0.00 z 0.00 z 3435.50
2002 0.00 z 0.00 z 623.00 380.00 319.50 118.00 18.50 36.50 79.00 0.00 z 506.50 668.00 2749.00
2003 589.00 570.00 513.00 445.50 271.50 84.50 10.50 10.00 83.00 267.50 636.50 732.50 4213.50
2004 800.00 584.50 455.50 324.50 232.50 81.50 7.50 4.50 122.00 307.50 615.50 701.50 4237.00
2005 727.50 605.00 495.00 424.00 213.50 156.00 12.00 14.00 129.50 308.50 646.50 772.00 4503.50
2006 628.00 636.50 614.50 379.00 235.50 85.50 20.00 37.50 79.00 367.50 545.50 771.00 4399.50
2007 838.50 571.50 475.50 426.00 253.50 125.00 5.50 19.00 0.00 z 0.00 z 0.00 z 0.00 z 2714.50
Period of Record Statistics
MEAN 772.86 617.12 570.40 447.40 288.05 134.89 41.03 40.49 120.72 368.87 591.32 771.64 4793.63
S.D. 102.15 71.67 70.99 74.79 60.98 45.32 23.43 26.91 54.25 55.65 81.10 84.78 374.98
SKEW 0.68 0.11 -0.11 0.48 -0.14 0.33 0.23 0.99 0.56 -0.14 0.69 0.64 0.01
MAX 1043.50 825.50 709.38 631.00 403.50 243.50 94.50 107.00 245.50 488.50 806.90 980.50 5532.48
MIN 589.00 472.50 425.50 301.00 156.00 54.11 5.50 4.50 38.00 254.00 422.50 647.00 4046.00
NO YRS 43 44 45 44 45 44 45 45 43 43 43 42 37