HILLSBORO, OR

Monthly Sum of Heating Degree Days (Degrees Fahrenheit)

(353908)

Base Temperature = 65 F

File last updated on Jul 04, 2015
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.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
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)JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANN
1929-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z586.50f658.50a658.50k
19301191.21b567.00a510.52b360.50 385.50 219.05b95.69b67.50c160.02b451.50a505.50f627.00g4008.49b
1931561.00f639.17b548.79b345.50a164.50a134.12b13.89d51.50 205.00a399.50a692.50a811.55b4006.03a
1932837.00a723.00 588.00 425.00 297.00a109.00 83.50 50.50a77.33c173.50l549.88d855.58e4595.79a
1933790.34b452.00k612.41b431.00 388.85e145.00b30.00b46.03b254.50 245.50h492.00h598.93c3297.07c
1934200.00u541.08c373.33d189.08e283.97b176.07b35.00a26.50 191.61b334.50 528.00 743.50 3422.64a
1935847.50 604.00a736.00 451.50 327.50a203.50 90.50 49.50 123.50 486.72b756.00 798.00a5474.22
1936710.50a908.00 661.00a349.04b187.00 73.50 15.00a23.00 157.00 333.50a748.00 728.00a4893.54
19371138.50 662.50a545.00 475.50 215.00 77.00a31.50 68.33d132.50 307.22d522.50 707.50 4883.06
1938771.00a664.00 597.93b399.00 227.00 74.05b30.00a76.07c66.00a376.00 680.38d759.00a4720.44
1939703.00a721.37e547.00a385.00 250.00 180.50 68.00 52.50 124.00 359.48b597.19c635.50a4623.54
1940745.50a564.50 450.00a376.50 159.00 97.50a30.00 27.00 76.64b294.50 642.66b731.50 4195.30
1941710.00a563.50 434.50 370.50 289.50 127.00a14.50 49.50 221.00 362.00 580.00a747.50 4469.50
1942958.50 635.50a659.50 429.50 322.50 206.50 40.00 65.50a131.00 366.50 660.00 722.50 5197.50
1943964.00a602.83b650.50 341.50 340.50 169.00 43.50 70.00 57.50 353.50 640.50 803.00a5036.33
1944832.00 666.40d633.50 445.00 270.52b161.50 58.50 62.59b113.00 259.50 650.50 859.50 5012.50
1945745.50 597.50 644.50 465.00 222.50 165.00 46.50 50.00 199.50 405.00 591.00a778.50 4910.50
1946800.00 666.50 580.00 439.50 186.50 180.00 52.00 64.50 137.00 442.00a675.00 735.00 4958.00
1947914.50 564.50 480.00 316.50 192.00 150.50 62.00 76.03b113.00 339.50 591.00 722.50a4522.03
1948842.50 717.50 646.00 534.00 287.00a64.50 54.00a62.00 166.00 402.00a648.88b868.50a5292.88
19491123.50a737.50 598.00 353.00a194.00 102.50a48.00 26.50g62.50a524.50 488.00 762.00 4993.50a
19501089.50a708.50 624.31b497.50 310.50a111.50 29.50a27.50 103.00 407.00a602.00 559.00a5069.81
1951793.45b627.00 743.00 319.00a241.00 78.00 15.50 45.50 86.00 342.50a575.86b853.50 4720.31
1952901.00 678.00a641.50 363.00 245.00 144.46c12.41b32.00a74.05b186.50a746.75b728.50a4753.18
1953538.00a600.00 588.62b459.00a308.50a217.00 37.00 40.86b89.00a322.50 488.50a681.21b4370.19
1954833.50 590.50a626.67d454.16b226.00a211.50a77.50a77.07b157.00 380.69b488.00 765.00 4887.59
1955806.50a698.50 723.50a575.50 376.00 168.50 105.00a68.50 153.50 345.50a716.00 806.00 5543.00
1956742.00a850.50 648.00 351.00 206.50 215.00 36.50 47.00 110.50 404.48b669.00 615.50f4280.48a
19571064.00 637.00 527.00a361.50a171.21b111.34b39.50 44.50a34.00a353.50a641.00 649.50a4634.05
1958661.55b436.50a570.52b419.00 134.00 58.50a0.50a1.50a120.00 255.52b585.80e622.50e3865.89
1959724.00a643.00 564.44d398.75d309.00a150.00 49.00a76.07c174.00a345.00a615.21b803.50a4851.98
1960935.69b676.15b634.50a434.48b369.83b84.00 26.00a56.50 91.00a287.07b580.50 797.50 4973.22
1961617.59b489.52e529.82c428.79b281.00 75.50a22.00 1.00 161.50a383.00 657.00a721.55b4368.27
1962799.14b621.00b629.00a375.50a400.00 151.00 81.21b38.79b109.79b380.50 532.50a717.50a4835.92
1963930.52b498.00 609.83b507.50a270.50a179.50 102.00 57.00 57.50a372.50 455.00g763.50 4348.34a
1964702.50a677.50 654.00 546.00 413.50 195.00 87.00 127.00 233.50 375.50a693.50a808.50 5513.50
1965770.00 623.50 569.00a444.00 399.00 199.50 52.50 54.00 204.50 324.00 530.00 851.50 5021.50
1966758.00a661.50 621.00 424.50 309.50 186.50 70.00 70.00 127.50 434.50 524.00 664.50 4851.50
1967653.50a611.00 653.50a586.50 322.00 93.50 10.00 1.50 41.50a333.00a531.00 734.50 4571.50
1968764.00 482.50 515.50 507.00 296.00a137.50 44.00 76.00 143.00 429.00 573.50 829.50 4797.50
1969969.00 680.50 571.00 453.00 210.52b51.50 53.50a88.00 139.50 423.50 581.50 715.00 4936.52
1970744.00 517.50 558.50 532.50 296.00 107.00 44.00 37.00 210.00 412.50 584.50 784.00 4827.50
1971774.00 630.00 658.00 458.00 266.00 219.00a52.50 14.50 167.00 446.50 606.50 800.50 5092.50
1972809.00a646.50 509.00 539.50 199.00 101.00 27.50 28.00 205.50 412.00 560.50 923.00 4960.50
1973784.14b543.50a594.50 443.50 253.50a160.50 34.00 108.00 123.50a400.00 637.50a652.50 4735.14
1974843.00 645.50 566.50 441.50 344.00 98.50 62.00 46.50 61.00 368.00 562.50 676.50 4715.50
1975734.00 670.00 620.00 553.50 273.50a172.00 46.00 92.00 85.50 397.00 622.00 692.00 4957.50
1976725.50 660.00a668.50 473.50 291.00 208.00 59.50 65.50 86.50 359.50 559.00 816.50 4973.00
1977696.50f581.00 656.00 393.00 388.00 103.00 77.50 43.50 142.00a357.41b649.50 680.00 4070.91a
1978718.00 527.50 460.50a441.50 319.50a77.00a37.50 45.50 167.00 327.00 743.50a926.00 4790.50
19791061.50 649.50 503.50 428.00 252.00 113.00 48.00a33.00 80.50a298.50 635.00 648.00 4750.50
1980905.00 654.50 604.50 384.50 299.00 219.50 43.00 98.50 154.50 359.00a543.00 684.50 4949.50
1981689.50 619.50 545.00 442.00 303.00 175.50 71.00 36.50 129.50 408.00 537.50 695.50 4652.50
1982856.50 650.50 622.00 532.00a297.00a121.00a67.50 58.00a155.00 382.78d662.00a764.50 5168.78
1983701.50 514.00a476.00a420.00 238.00 163.50 73.93c33.00a182.00 431.00 509.50 930.50 4672.93
1984737.00 597.50a485.19e479.00a365.89c184.00 55.71c50.00a163.50a471.50 586.00a863.50a5038.80
1985928.50 726.00 661.07c382.50a282.41b134.50a10.50 63.50a218.00 439.50 856.50 968.00 5670.99
1986697.50 610.00 439.50 468.50 325.00 86.50 89.50 2.00 206.50 324.00 564.50 792.50 4606.00
1987777.00 573.50 538.50 366.00 226.00 103.50a62.50 32.50 102.00 279.00 533.50 844.00 4438.00
1988826.50 617.50a581.00 410.50 327.00a141.00a36.00 71.50 162.50 238.45b564.00 769.29c4745.23
1989726.50a805.00a636.00 325.38e266.50a104.00 76.00 63.50 79.00 383.50 553.50 799.50 4818.38
1990707.50 691.00 521.50 351.50 306.50a129.50 28.50a30.50 54.00 420.50 577.00a968.00a4786.00
1991824.00 483.00 642.50 453.50 366.50 188.00a39.00 41.00 81.00 351.00a538.05b730.50a4738.05
1992675.50a493.00 425.00 324.18b178.00a77.68b21.21b32.50 160.50 315.00 594.00 824.00 4120.56
1993911.50 711.50 504.31b418.50 164.00a147.50 99.00a46.00 99.50a287.50 765.50a780.50 4935.31
1994682.50 678.12b483.00 359.39b218.50 153.50a28.50 15.00 59.50a452.50 732.00a716.50a4579.01
1995653.50 508.50a552.00 455.50 183.00 133.85d14.50 58.00 65.00 395.00a445.00 724.00 4187.85
1996763.00 689.00 539.00 369.00 310.34b108.50 24.50 36.00 169.50 403.00 626.50 712.50a4750.84
1997750.00 606.50a559.00a435.00 124.00 90.62b14.00a4.50 79.00a373.00 371.50 738.00 4145.12
1998657.50 495.50a450.00 340.00a234.00a34.50a2.00a11.00 34.00 305.00 444.50 751.00 3759.00
1999665.00a552.50 571.50 401.50 305.69b148.00a31.50q-----z-----z171.50s431.00a554.50 3629.69d
2000746.00a586.88d493.39c199.38b150.50f-----z-----z-----z-----z-----z-----z-----z2025.65h
2001-----z-----z-----z-----z271.67d202.46c63.00a55.00 151.50 480.00a413.50h445.50n1223.63f
2002811.50 644.00 704.00a359.50f318.00 109.56c11.00k16.50q49.50p386.90b551.00a689.00 4213.95d
2003629.00 582.50 518.50 434.50a267.50 -----z-----z-----z-----z-----z-----z-----z2432.00g
Period of Record Statistics
MEAN802.77 624.97 576.56 420.06 274.66 138.21 47.16 49.58 128.76 370.26 598.83 757.12 4788.67
S.D.130.86 84.68 77.90 74.69 68.49 48.35 25.88 25.25 53.34 61.61 87.52 87.35 367.22
SKEW0.98 0.45 -0.23 -0.33 -0.07 0.00 0.36 0.27 0.20 -0.26 0.25 0.20 -0.32
MAX1191.21 908.00 743.00 586.50 413.50 219.50 105.00 127.00 254.50 524.50 856.50 968.00 5670.99
MIN538.00 436.50 373.33 189.08 124.00 34.50 0.50 1.00 34.00 186.50 371.50 554.50 3759.00
YRS70.00 72.00 73.00 72.00 73.00 72.00 70.00 69.00 70.00 69.00 68.00 70.00 60.00