FOREST GROVE, OREGON

Monthly Total Heating Degree Days

(352997)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1893 1058.50 831.00 714.00 591.00 334.50 272.50 93.50 0.00 z 85.00 u 565.23 a 678.00 726.50 5864.73
1894 855.50 852.00 727.00 517.00 364.77 a 151.00 k 0.00 z 0.00 z 0.00 z 443.62 b 567.00 866.97 a 5193.85
1895 921.00 641.67 d 664.50 437.00 321.50 0.00 z 0.00 z 0.00 z 0.00 z 354.50 707.00 803.00 4850.17
1896 790.00 618.50 666.50 567.00 412.00 176.00 0.00 z 0.00 z 194.00 380.00 826.00 695.50 5325.50
1897 835.50 637.50 765.50 347.00 185.50 156.50 0.00 z 0.00 z 243.10 a 388.00 678.50 741.50 4978.60
1898 887.50 605.00 696.50 421.00 311.00 0.00 z 0.00 z 0.00 z 0.00 z 454.50 399.00 l 937.00 4312.50
1899 803.00 813.00 729.53 a 530.00 456.50 0.00 z 0.00 z 0.00 z 0.00 z 501.88 b 454.00 774.50 5062.41
1900 759.00 723.50 468.50 438.00 303.50 57.50 m 0.00 z 0.00 z 0.00 z 472.50 651.00 701.00 4517.00
1901 850.00 693.84 c 599.16 b 511.00 271.00 0.00 z 0.00 z 0.00 z 0.00 z 214.50 549.00 768.50 4457.00
1902 823.50 564.85 b 642.22 a 481.00 304.83 d 0.00 z 0.00 z 0.00 z 0.00 z 313.00 639.00 805.50 4573.90
1903 755.50 740.00 688.50 548.00 306.00 107.00 90.00 67.00 189.50 373.00 633.00 682.00 5179.50
1904 799.00 748.50 703.00 340.00 274.50 103.50 74.00 63.00 123.00 337.50 481.50 736.80 c 4784.30
1905 838.55 a 592.50 0.00 z 97.50 u 328.50 157.50 37.00 66.50 170.50 495.50 679.00 848.50 4214.05
1906 757.50 643.00 694.50 339.00 292.50 225.00 14.50 36.34 b 214.82 b 436.50 647.00 792.50 5093.17
1907 999.20 c 629.00 700.08 a 482.00 280.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3090.28
1908 724.00 667.00 612.00 433.50 387.50 0.00 z 0.00 z 22.50 g 200.50 476.37 a 544.00 847.00 4891.87
1909 1110.00 637.50 586.50 467.50 343.50 142.50 78.00 17.00 p 97.50 l 387.00 620.50 974.00 5347.00
1910 929.47 b 746.50 463.00 416.50 208.00 0.00 z 0.00 z 0.00 z 0.00 z 324.50 632.50 476.00 k 3720.47
1911 908.00 731.50 539.00 508.00 395.50 0.00 z 19.00 27.50 238.00 425.00 585.50 775.50 5152.50
1912 766.50 617.00 633.00 487.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2503.50
1913 924.04 e 278.00 r 653.50 491.90 a 241.50 108.33 c 76.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2495.27
1914 0.00 z 0.00 z 328.50 h 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
1915 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
1916 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 178.00 87.50 37.50 110.00 441.00 719.50 884.50 2458.00
1917 829.50 700.50 747.50 531.50 371.50 160.50 16.50 7.00 120.00 323.50 517.50 576.00 4901.50
1918 666.50 712.00 609.50 424.50 350.50 54.50 28.50 54.50 49.00 354.50 628.00 783.00 4715.00
1919 778.00 673.00 570.50 412.50 314.00 173.50 53.00 30.50 120.50 503.00 655.00 1066.50 5350.00
1920 819.50 713.00 661.00 545.00 391.50 162.50 28.50 53.50 174.50 419.00 626.00 725.00 5319.00
1921 784.00 604.50 575.50 478.50 291.00 91.00 64.00 34.50 217.50 326.00 554.00 864.00 4884.50
1922 973.00 761.50 719.50 543.50 310.00 72.00 38.00 33.00 122.00 370.40 b 742.50 941.00 5626.40
1923 783.00 823.00 613.50 411.50 292.50 163.50 47.50 25.50 122.00 346.00 531.00 791.00 4950.00
1924 898.00 558.00 634.50 418.00 179.50 118.50 59.50 62.50 170.50 410.50 687.50 997.50 5194.50
1925 728.50 583.50 595.00 380.50 171.00 158.00 24.00 85.50 137.00 371.50 653.00 700.50 4588.00
1926 812.00 548.00 463.50 243.00 276.50 108.00 42.00 29.50 207.00 316.00 543.50 827.00 4416.00
1927 860.00 637.00 645.50 462.50 366.00 98.50 45.50 40.50 183.00 398.50 546.00 911.00 5194.00
1928 889.00 684.50 521.50 487.50 182.50 156.00 64.50 43.00 175.50 417.50 646.50 886.50 5154.50
1929 995.00 909.50 616.50 545.50 288.50 151.00 52.50 37.00 121.67 c 318.50 740.50 721.50 5497.67
1930 1254.00 609.50 535.00 371.00 384.50 167.50 67.00 19.50 139.50 452.00 673.00 856.00 5528.50
1931 729.50 650.00 561.62 a 373.50 179.00 139.50 25.00 39.50 186.50 392.00 731.50 857.50 4865.12
1932 878.00 740.00 587.50 427.50 302.50 115.00 82.50 53.50 92.50 358.50 583.00 949.00 5169.50
1933 874.00 805.00 645.00 455.00 418.00 163.00 41.00 40.00 231.50 328.00 650.00 644.50 5295.00
1934 639.00 533.00 412.00 240.50 206.00 144.50 36.00 23.00 155.00 321.50 537.50 740.50 3988.50
1935 863.50 623.50 713.00 465.50 275.00 108.00 93.00 33.00 78.00 465.00 757.50 832.00 5307.00
1936 734.50 925.50 679.00 358.50 198.50 100.00 34.00 24.50 135.52 a 352.50 733.50 753.50 5029.52
1937 1157.00 727.00 552.50 517.50 261.00 92.50 27.50 59.00 127.00 292.00 525.00 727.00 5065.00
1938 810.00 674.00 642.50 395.50 259.50 94.50 27.50 57.00 37.00 359.60 a 708.00 760.02 a 4825.12
1939 744.50 748.00 551.00 371.00 239.50 173.00 54.00 29.50 103.97 a 356.00 589.00 655.50 4614.97
1940 781.50 586.00 491.50 390.00 a 171.50 90.00 18.00 13.50 73.00 306.00 701.00 733.50 4355.50
1941 734.50 553.00 428.50 368.00 284.00 147.00 10.00 40.00 195.50 394.50 562.00 737.50 4454.50
1942 961.00 648.00 617.00 403.00 300.00 185.00 26.50 44.50 79.50 351.00 654.50 719.00 4989.00
1943 983.50 625.00 644.50 355.00 323.50 171.00 27.00 53.50 65.00 362.00 614.00 823.50 5047.50
1944 842.50 677.50 617.00 444.50 259.50 148.50 47.00 39.00 98.00 292.50 641.00 862.00 4969.00
1945 739.00 603.50 655.50 485.00 217.00 174.00 40.50 29.50 180.50 394.00 631.00 792.50 4942.00
1946 810.50 659.00 604.50 446.50 190.50 183.50 52.00 42.50 154.00 492.50 687.00 744.00 5066.50
1947 926.50 563.50 487.00 334.50 159.50 163.00 38.50 64.50 103.00 377.00 603.50 751.00 4571.50
1948 832.00 751.50 669.00 535.00 296.50 57.00 67.50 64.00 171.50 431.00 657.00 902.00 5434.00
1949 1184.00 732.00 602.50 375.00 201.50 127.50 67.50 42.00 88.00 525.00 492.32 b 776.00 5213.32
1950 1162.00 726.00 631.00 493.50 317.00 123.50 30.50 33.50 112.50 418.50 577.00 582.00 5207.00
1951 828.00 644.50 735.50 334.50 245.50 85.00 16.02 a 50.50 86.00 374.00 601.50 854.50 4855.52
1952 902.50 708.43 a 640.50 386.50 255.75 a 147.93 a 37.00 63.00 112.00 209.50 773.50 778.50 5015.11
1953 598.00 619.50 637.50 502.50 361.50 265.00 86.00 69.00 136.55 a 359.50 500.00 706.50 4841.55
1954 851.50 632.00 680.00 471.00 248.00 204.50 87.00 89.00 171.50 426.50 498.50 753.62 b 5113.12
1955 845.27 a 697.00 743.00 593.00 377.50 168.00 125.55 a 81.50 184.50 376.50 714.50 805.00 5711.32
1956 786.50 874.00 656.50 372.00 195.50 197.00 42.50 40.50 125.50 443.00 700.50 791.50 5225.00
1957 1063.00 654.50 558.50 398.28 a 196.50 139.14 a 82.50 95.00 56.00 388.02 a 676.00 683.00 4990.43
1958 680.00 464.50 616.00 426.00 150.50 92.00 7.50 11.00 137.00 324.00 569.50 607.00 4085.00
1959 728.00 640.50 598.00 406.50 315.00 126.00 36.00 50.50 161.50 317.50 599.50 749.34 b 4728.34
1960 906.00 662.00 599.50 429.50 333.50 92.00 32.00 66.50 96.50 299.50 567.50 772.50 4857.00
1961 638.50 511.50 547.00 413.50 272.00 81.00 20.00 2.00 159.00 353.50 670.50 726.00 4394.50
1962 853.50 601.50 636.50 381.00 377.00 143.00 59.00 36.00 54.00 319.00 497.50 674.00 4632.00
1963 929.00 454.00 595.50 461.50 268.50 169.50 86.50 34.00 58.50 333.00 564.50 771.00 4725.50
1964 715.50 673.00 631.00 501.50 359.00 147.50 55.00 81.50 121.50 319.50 667.00 813.00 5085.00
1965 742.50 583.50 539.50 361.50 345.50 125.00 33.00 21.00 124.50 244.50 501.00 830.00 4451.50
1966 758.50 633.00 586.00 375.00 236.50 130.50 37.31 d 21.00 72.00 340.50 517.00 639.50 4346.81
1967 663.00 577.50 642.50 549.50 272.00 57.50 8.50 4.00 34.00 324.50 537.00 747.50 4417.50
1968 779.50 507.50 508.00 476.00 261.00 124.00 33.50 63.00 116.00 404.00 570.00 837.00 4679.50
1969 993.50 700.50 567.00 459.00 184.45 a 54.50 43.00 53.50 95.50 410.50 591.00 725.50 4877.95
1970 757.00 545.50 577.78 b 516.00 277.50 93.50 26.50 18.50 156.50 398.50 571.00 787.50 4725.78
1971 790.00 639.50 685.50 466.00 229.00 206.50 49.00 7.50 144.50 414.00 585.00 800.00 5016.50
1972 818.50 643.50 504.50 544.50 188.50 97.50 15.50 17.50 195.00 359.50 525.50 909.50 4819.50
1973 836.50 579.50 578.00 422.50 247.00 138.50 29.00 68.50 85.50 388.50 666.00 659.50 4699.00
1974 843.50 631.50 553.00 434.00 335.00 92.00 39.00 29.00 36.00 307.00 556.00 675.00 4531.00
1975 735.00 672.00 622.50 543.50 268.67 a 147.00 36.00 75.00 57.00 402.50 616.00 686.50 4861.67
1976 731.50 671.00 638.50 456.50 247.00 193.93 b 54.00 88.50 111.00 361.00 543.00 819.50 4915.43
1977 872.00 577.50 649.00 389.00 383.00 108.00 92.00 60.00 206.00 459.50 688.50 727.50 5212.00
1978 756.50 570.50 518.00 464.00 368.50 100.50 45.50 62.50 191.50 350.00 834.00 941.50 5203.00
1979 1118.50 709.00 531.00 457.50 258.50 138.00 54.00 38.50 94.50 275.50 651.00 661.00 4987.00
1980 942.50 644.00 604.50 372.00 282.00 196.50 37.50 65.50 114.50 338.00 543.00 707.00 4847.00
1981 707.50 644.50 558.50 442.50 342.79 e 181.00 71.00 30.00 130.50 420.50 548.00 724.00 4800.79
1982 882.00 666.50 626.50 554.00 281.50 107.50 62.00 41.00 129.00 406.00 680.00 816.50 5252.50
1983 695.00 540.50 516.00 431.50 241.00 167.00 67.00 13.00 188.00 423.00 535.50 953.77 a 4771.27
1984 767.00 625.00 513.00 504.50 364.00 182.50 44.00 40.00 161.00 479.00 638.79 a 912.00 5230.79
1985 932.50 726.00 654.50 397.50 283.50 132.00 8.00 53.00 201.50 420.50 850.00 979.00 5638.00
1986 697.00 590.07 a 449.00 467.00 313.00 80.00 84.50 0.00 197.00 303.50 575.00 777.50 4533.57
1987 792.50 0.00 z 533.50 346.50 0.00 z 0.00 z 47.50 20.50 89.48 a 0.00 z 508.00 828.00 3165.98
1988 815.00 610.04 a 568.50 419.00 324.50 157.00 41.50 48.50 141.50 231.00 570.00 766.00 4692.54
1989 724.00 834.50 609.50 300.50 231.50 87.00 56.50 49.00 60.00 365.00 526.50 778.00 4622.00
1990 707.00 691.50 516.50 334.50 320.00 147.50 25.00 39.00 93.00 450.50 591.50 1019.50 4935.50
1991 870.00 504.50 614.00 460.50 342.50 163.50 23.00 13.50 69.00 337.50 569.50 727.50 4695.00
1992 678.50 486.50 401.00 300.00 127.50 33.50 4.50 6.50 101.50 255.00 582.50 780.50 3757.50
1993 926.00 706.50 516.00 392.00 117.50 103.00 58.50 21.50 69.00 284.50 803.50 822.00 4820.00
1994 692.00 722.50 503.50 366.50 176.00 116.00 27.00 5.00 43.00 448.50 756.50 763.50 4620.00
1995 720.50 310.50 l 560.00 455.50 160.00 118.00 15.00 40.50 54.50 384.50 452.50 758.50 3719.50
1996 785.50 749.00 580.00 392.50 350.00 131.00 27.50 44.00 177.50 416.50 640.86 a 764.00 5058.36
1997 797.00 649.50 583.50 437.50 146.00 122.50 20.00 3.50 75.50 389.00 482.50 789.50 4496.00
1998 710.50 555.00 512.00 432.50 303.50 70.50 10.00 18.50 61.50 380.50 541.50 785.50 4381.50
1999 723.00 627.50 636.53 a 470.50 358.00 179.00 41.00 16.50 91.50 347.50 464.00 704.50 4659.53
2000 815.00 617.50 629.00 371.00 297.00 127.50 74.00 75.50 179.00 443.50 784.00 785.00 5198.00
2001 776.03 a 681.00 570.00 495.00 247.00 207.41 a 78.00 21.50 75.50 393.50 568.45 a 816.50 4929.90
2002 779.00 630.00 654.50 382.50 301.50 83.50 9.00 18.00 74.50 373.00 522.00 689.00 4516.50
2003 645.00 601.50 535.00 475.00 291.50 97.00 12.00 11.50 75.50 240.00 684.00 754.50 4422.50
2004 841.50 606.50 462.00 337.00 199.50 74.00 3.00 5.50 129.50 302.50 648.00 714.00 4323.00
2005 721.50 621.00 486.00 423.00 195.00 146.50 18.00 13.00 155.00 346.00 663.00 653.00 h 3788.00
2006 671.00 664.09 e 631.00 388.50 253.00 108.50 33.50 49.00 101.50 401.50 651.11 c 822.00 4774.70
2007 893.00 601.50 551.80 a 483.50 282.00 157.50 16.50 38.00 158.00 454.00 646.50 824.17 b 5106.47
2008 898.50 676.50 683.50 581.50 289.50 0.00 z 46.00 49.50 115.00 398.50 521.50 906.00 5166.00
2009 847.50 713.50 687.00 477.00 267.50 97.50 25.00 42.50 91.00 396.50 609.00 935.00 5189.00
2010 642.50 545.50 562.50 492.00 355.00 193.00 65.00 58.50 106.00 355.50 647.50 708.00 4731.00
2011 784.50 739.50 640.00 577.50 412.00 180.50 80.50 21.50 79.50 361.00 684.50 865.00 5426.00
2012 791.69 e 667.00 703.00 427.76 a 313.50 191.50 45.00 39.50 94.50 353.29 b 575.00 110.00 y 4201.74
2013 910.00 626.50 579.50 7.00 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 2116.00
Period of Record Statistics
MEAN 827.59 656.05 600.46 439.85 281.55 136.21 44.68 40.10 126.41 375.99 616.56 788.02 4885.30
S.D. 121.52 87.61 76.74 72.19 70.75 44.62 25.16 22.20 51.19 65.51 85.47 92.45 363.21
SKEW 1.04 0.52 -0.27 -0.11 -0.11 0.29 0.58 0.28 0.24 0.02 0.41 0.47 -0.27
MAX 1254.00 925.50 765.50 593.00 456.50 272.50 125.55 95.00 243.10 565.23 850.00 1066.50 5711.32
MIN 598.00 454.00 401.00 240.50 117.50 33.50 3.00 0.00 34.00 209.50 452.50 576.00 3757.50
NO YRS 118 115 117 116 115 104 105 102 105 114 114 112 94