FOREST GROVE, OREGON

Monthly Total Growing Degree Days

(352997)

Base Temperature = 40 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 0.00 16.00 84.00 159.00 440.50 477.50 707.00 0.00 z 140.00 u 215.45 a 110.50 83.00 2292.95
1894 39.50 14.50 84.50 233.00 437.62 a 336.50 k 0.00 z 0.00 z 0.00 z 331.38 b 190.50 4.65 a 1335.65
1895 21.50 109.67 d 133.50 318.00 458.50 0.00 z 0.00 z 0.00 z 0.00 z 420.50 73.50 48.50 1583.67
1896 64.00 126.50 180.00 185.00 365.00 604.00 0.00 z 0.00 z 601.00 395.00 77.00 96.50 2694.00
1897 60.50 91.00 58.00 416.50 645.50 626.00 0.00 z 0.00 z 519.31 a 387.00 98.00 102.00 3003.81
1898 19.00 112.50 99.00 330.50 467.50 0.00 z 0.00 z 0.00 z 0.00 z 320.50 63.00 l 19.00 1368.00
1899 80.50 65.00 65.62 a 220.00 318.50 0.00 z 0.00 z 0.00 z 0.00 z 273.12 b 296.00 54.50 1373.24
1900 64.50 43.00 306.50 313.00 472.00 385.00 m 0.00 z 0.00 z 0.00 z 302.50 153.00 106.00 1760.50
1901 22.50 90.16 c 177.45 b 240.00 518.50 0.00 z 0.00 z 0.00 z 0.00 z 564.50 203.50 65.50 1882.11
1902 88.50 169.08 b 134.33 a 269.50 478.78 d 0.00 z 0.00 z 0.00 z 0.00 z 462.00 121.50 36.50 1760.19
1903 85.00 49.50 105.00 206.00 473.50 695.00 717.00 729.50 561.50 402.00 135.00 109.50 4268.50
1904 46.00 25.50 87.00 413.50 508.00 715.00 787.50 802.00 650.50 450.00 268.50 84.14 c 4837.64
1905 37.72 a 157.50 0.00 z 127.50 u 452.00 594.50 850.50 768.50 585.00 281.00 92.00 36.50 3855.22
1906 75.50 75.00 154.50 412.50 483.50 528.50 940.00 812.41 b 555.54 b 338.50 161.50 57.50 4594.95
1907 9.41 c 98.50 94.55 a 268.00 500.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 970.46
1908 73.50 86.50 167.50 317.00 387.50 0.00 z 0.00 z 637.50 g 577.50 300.70 a 211.50 19.00 2140.70
1909 7.00 77.00 188.50 282.50 445.50 610.00 734.00 384.00 p 361.50 l 388.00 162.50 9.50 2904.50
1910 12.83 b 35.00 313.00 336.00 571.50 0.00 z 0.00 z 0.00 z 0.00 z 450.50 124.50 53.00 k 1843.33
1911 13.50 20.00 237.00 242.00 381.00 0.00 z 933.50 802.00 515.00 350.00 176.00 41.00 3711.00
1912 107.00 111.50 155.50 263.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 637.00
1913 4.77 e 7.00 r 156.50 259.66 a 554.00 666.11 c 800.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2441.04
1914 0.00 z 0.00 z 248.00 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 601.50 696.50 872.00 649.50 334.00 88.50 17.00 3259.00
1917 55.50 61.50 52.00 218.50 403.50 610.00 890.00 937.00 647.50 459.00 232.50 207.50 4774.50
1918 134.50 45.00 177.00 325.50 424.50 775.00 839.50 821.50 790.00 420.50 132.00 80.50 4965.50
1919 88.00 49.50 204.50 337.50 463.00 580.50 847.00 848.50 645.00 285.00 140.00 27.00 4515.50
1920 83.00 38.00 121.50 205.00 383.50 609.00 821.00 869.00 582.50 356.00 129.00 73.00 4270.50
1921 52.00 121.00 203.00 271.50 489.50 682.00 739.00 797.50 532.50 449.00 198.50 69.50 4605.00
1922 5.50 23.00 73.50 209.00 489.00 724.00 843.50 815.00 660.50 405.14 b 54.00 48.50 4350.64
1923 66.50 27.50 179.00 338.50 486.00 621.50 803.00 875.50 659.50 431.50 219.00 39.00 4746.50
1924 55.50 171.50 140.50 332.00 608.50 680.00 783.00 760.00 612.50 364.50 93.00 61.00 4662.00
1925 81.00 123.50 180.00 369.50 620.50 642.50 861.50 754.00 627.00 403.50 124.00 107.00 4894.00
1926 50.50 156.50 311.50 519.00 499.00 727.00 851.50 803.50 551.00 459.00 209.00 53.00 5190.50
1927 53.50 82.00 134.00 288.00 410.50 677.00 813.00 841.50 578.50 376.50 213.00 29.00 4496.50
1928 33.50 55.50 253.50 262.50 613.50 601.50 821.00 791.50 581.00 357.50 124.50 24.00 4519.50
1929 10.50 10.00 163.00 208.50 486.50 614.50 788.50 819.50 651.11 c 457.00 64.50 79.50 4353.11
1930 5.50 107.50 244.00 379.00 390.50 589.50 764.50 864.00 646.50 323.00 116.00 24.50 4454.50
1931 91.00 64.50 213.38 a 378.00 627.50 636.50 853.00 833.50 596.00 383.00 98.50 23.00 4797.88
1932 25.50 86.50 192.50 322.50 472.50 717.00 716.50 838.00 708.00 427.50 178.00 28.50 4713.00
1933 46.00 29.00 133.00 295.00 357.00 601.00 808.50 869.00 519.50 447.00 112.00 145.00 4362.00
1934 143.50 168.00 363.00 513.50 576.50 638.00 799.50 881.00 640.50 455.50 215.50 70.00 5464.50
1935 52.50 96.50 84.50 284.50 503.00 706.00 816.00 857.00 724.50 329.50 68.00 54.50 4576.50
1936 82.50 26.50 120.50 398.50 600.00 673.50 779.50 826.00 627.41 a 426.00 74.50 80.00 4714.91
1937 0.00 42.00 224.50 232.50 516.00 708.50 842.00 779.50 671.50 483.00 225.00 97.00 4821.50
1938 42.50 57.50 143.50 354.50 533.00 713.00 930.00 754.50 773.00 415.40 a 82.00 101.27 a 4900.17
1939 70.00 19.50 230.50 379.00 547.00 590.50 864.00 874.00 681.72 a 419.00 161.00 151.50 4987.72
1940 68.50 141.50 283.50 360.00 a 618.00 746.00 821.00 893.00 705.00 471.50 74.50 99.00 5281.50
1941 83.50 147.00 346.50 382.00 510.50 624.50 946.50 839.50 556.00 380.50 211.00 90.00 5117.50
1942 20.50 65.50 161.50 347.00 478.50 591.50 869.50 878.00 687.00 426.50 109.00 88.50 4723.00
1943 10.00 97.50 139.00 395.00 457.00 599.50 834.00 744.50 748.00 416.00 140.50 49.00 4630.00
1944 31.50 60.50 160.00 305.50 518.00 630.00 833.50 803.00 715.50 482.50 133.50 35.50 4709.00
1945 109.50 107.00 126.50 265.00 567.00 625.50 869.50 860.00 582.50 381.00 132.50 87.50 4713.50
1946 46.00 63.50 172.00 303.50 586.00 591.00 817.50 839.50 607.50 285.50 82.50 108.00 4502.50
1947 36.50 147.50 288.00 418.50 649.00 594.00 770.50 751.50 684.50 398.00 158.00 49.00 4945.00
1948 19.00 58.50 113.50 216.00 483.50 784.50 769.00 743.00 615.00 344.00 109.50 17.00 4272.50
1949 0.00 63.50 173.00 375.00 586.50 658.50 777.00 808.00 704.50 252.00 259.29 b 61.00 4718.29
1950 1.00 93.00 151.00 256.50 461.00 659.50 833.00 883.00 682.50 356.50 195.50 194.00 4766.50
1951 46.50 90.00 109.50 415.50 535.50 729.00 864.90 a 801.00 720.50 401.00 156.50 30.00 4899.90
1952 22.50 69.39 a 141.50 363.50 529.58 a 607.76 a 871.00 802.00 702.50 574.00 79.00 46.00 4808.73
1953 183.50 92.50 145.50 251.00 418.00 486.50 744.00 759.50 642.93 a 419.00 250.00 94.50 4486.93
1954 35.00 87.50 110.00 279.50 530.50 550.50 694.50 697.50 588.00 348.50 263.50 65.74 b 4250.74
1955 21.18 a 46.00 69.50 159.50 399.00 618.00 672.70 a 734.00 613.50 398.50 157.50 64.00 3953.38
1956 80.00 14.50 149.00 379.00 611.50 559.50 874.00 813.50 632.50 338.00 91.00 101.50 4644.00
1957 5.50 95.50 216.50 363.62 a 595.00 626.90 a 711.00 684.50 747.50 386.98 a 101.00 115.50 4649.50
1958 123.50 235.50 164.50 324.00 653.50 749.50 935.00 902.00 654.00 454.50 220.00 180.00 5596.00
1959 121.00 81.50 180.50 343.50 461.50 653.50 889.50 783.00 599.00 457.50 168.50 72.16 b 4811.16
1960 29.50 92.00 215.50 320.50 441.50 691.50 894.00 790.00 693.50 478.50 186.00 63.50 4896.00
1961 167.50 191.00 228.50 336.50 508.50 792.00 909.50 971.50 605.50 427.00 110.00 113.00 5360.50
1962 57.00 146.00 156.50 369.50 398.00 627.50 816.00 797.00 729.00 456.00 258.50 131.00 4942.00
1963 22.50 250.00 181.00 289.00 527.50 623.50 708.50 820.00 753.50 442.00 192.50 58.00 4868.00
1964 79.00 63.50 148.50 249.50 418.00 604.00 809.50 760.00 636.50 455.50 110.50 85.50 4420.00
1965 69.00 126.50 237.00 390.50 429.50 645.50 901.00 884.50 634.50 532.00 256.00 71.00 5177.00
1966 60.50 81.50 202.50 375.00 558.00 653.00 812.89 d 852.00 736.00 434.50 237.00 146.00 5148.89
1967 119.00 123.50 136.00 200.50 507.00 781.50 892.50 1028.50 794.00 450.50 216.00 95.00 5344.00
1968 84.50 220.00 267.00 274.00 517.00 663.50 883.50 798.50 679.50 371.00 184.00 49.50 4992.00
1969 6.50 36.50 209.50 291.00 610.18 a 819.50 822.50 785.50 719.50 364.50 182.00 86.00 4933.18
1970 107.50 159.00 199.90 b 235.00 507.00 779.00 887.00 895.00 599.00 378.00 205.00 46.50 4997.90
1971 84.50 98.00 120.00 284.00 554.50 551.50 892.50 952.50 617.00 371.50 170.00 34.00 4730.00
1972 66.00 131.00 273.00 205.50 621.50 682.50 959.00 957.00 606.00 418.00 225.50 110.50 5255.50
1973 47.00 130.00 197.00 327.50 555.50 663.00 910.50 773.50 726.00 386.50 103.50 123.50 4943.50
1974 113.50 82.00 234.50 316.00 440.00 730.50 834.50 902.50 829.50 472.00 197.00 139.50 5291.50
1975 106.00 80.50 153.00 206.50 512.53 a 634.50 873.00 752.50 755.50 372.50 153.50 136.50 4736.53
1976 96.50 78.50 153.00 293.50 535.00 569.46 b 808.50 737.00 663.50 414.00 219.00 21.00 4588.96
1977 43.50 128.00 132.50 361.00 392.00 662.50 736.00 908.00 547.50 315.50 127.00 102.00 4455.50
1978 72.50 144.50 257.00 286.00 407.00 703.00 858.00 816.00 564.00 425.00 51.50 28.50 4613.00
1979 4.50 73.00 244.50 293.00 524.00 647.50 830.50 775.00 690.00 504.00 122.50 124.00 4832.50
1980 19.00 117.50 171.50 379.00 493.00 553.50 848.50 749.00 655.00 442.50 208.00 123.50 4760.00
1981 83.00 114.50 216.50 309.50 432.21 e 583.00 797.00 941.50 671.50 354.50 211.50 85.00 4799.71
1982 44.50 103.50 149.50 196.00 504.00 718.00 781.50 850.50 673.50 369.00 107.00 43.50 4540.50
1983 114.00 162.00 259.00 318.50 569.00 594.00 756.50 830.00 564.50 352.00 218.00 35.13 a 4772.63
1984 103.50 101.00 262.00 245.50 418.00 582.50 823.00 810.50 605.00 297.00 120.52 a 2.00 4370.52
1985 1.50 53.00 130.00 352.50 496.00 656.50 982.00 806.00 551.00 354.50 90.00 4.00 4477.00
1986 83.50 145.70 a 326.00 283.00 502.00 779.00 727.00 989.00 603.00 473.50 180.50 41.50 5133.70
1987 59.00 0.00 z 241.50 410.00 0.00 z 0.00 z 817.00 908.50 741.21 a 0.00 z 246.50 73.50 3497.21
1988 34.00 150.70 a 209.50 332.00 460.50 631.50 873.00 832.50 673.50 558.00 189.50 58.50 5003.20
1989 93.00 39.50 184.50 453.00 557.00 740.00 779.00 803.50 744.50 410.00 225.50 69.50 5099.00
1990 96.50 83.00 264.50 418.00 458.00 628.00 919.00 875.00 698.50 324.50 159.50 29.00 4953.50
1991 48.00 196.50 163.50 289.50 432.50 603.50 912.00 937.00 775.00 449.50 191.00 75.50 5073.50
1992 116.00 238.50 374.00 450.00 724.50 888.00 966.00 958.00 690.50 525.00 177.50 59.00 6167.00
1993 47.50 57.50 259.50 358.00 706.50 686.00 737.50 920.50 773.00 496.50 45.00 63.00 5150.50
1994 116.00 53.50 271.50 383.50 630.50 678.50 973.50 909.50 800.00 326.50 52.50 87.00 5282.50
1995 99.00 115.00 l 216.50 294.50 667.50 703.50 993.50 828.50 778.00 390.50 298.50 86.50 5356.50
1996 66.00 101.00 196.50 360.50 425.00 641.50 986.50 885.50 584.50 366.00 144.31 a 69.50 4826.81
1997 70.00 92.00 192.00 312.50 690.00 645.50 871.00 951.00 735.00 386.00 267.50 50.00 5262.50
1998 111.00 148.00 264.00 325.50 486.00 712.00 968.00 923.50 789.00 396.50 210.50 110.50 5444.50
1999 81.50 75.50 147.25 a 279.50 425.00 593.50 835.00 918.50 724.50 427.50 286.00 96.50 4890.25
2000 24.50 108.00 146.00 379.00 478.00 683.50 775.50 765.50 597.50 331.50 59.00 41.50 4389.50
2001 38.75 a 47.00 208.00 255.50 543.00 572.07 a 750.00 889.00 739.00 382.50 187.76 a 27.50 4640.08
2002 53.00 82.00 131.50 367.50 480.00 747.00 966.50 907.00 728.00 405.00 233.00 101.50 5202.00
2003 138.50 103.50 241.00 275.00 500.50 762.00 949.50 891.50 766.00 543.50 108.50 69.50 5349.00
2004 51.00 123.50 313.00 415.00 582.50 760.50 989.00 980.00 637.50 474.50 128.00 80.00 5534.50
2005 118.50 86.50 289.00 327.00 600.00 617.50 894.50 918.50 613.50 429.00 103.50 37.50 h 4997.50
2006 112.00 79.74 e 157.00 362.50 551.00 707.00 908.00 826.50 687.50 377.50 122.22 c 49.50 4940.46
2007 29.50 114.50 226.82 a 268.00 502.50 621.00 887.00 810.00 617.00 321.00 142.50 39.55 b 4579.37
2008 20.50 82.00 106.00 174.00 514.00 0.00 z 830.00 868.00 688.50 376.50 234.50 41.50 3935.50
2009 35.00 43.50 107.00 276.50 522.00 681.50 956.00 850.00 702.50 378.50 142.50 40.50 4735.50
2010 135.50 154.50 212.50 258.50 420.00 564.00 817.00 823.00 671.50 422.00 166.00 94.00 4738.50
2011 79.00 37.00 145.00 172.50 363.00 580.50 738.00 845.50 757.50 414.00 88.00 18.00 4238.00
2012 56.63 e 74.50 109.00 325.86 a 469.00 572.00 810.00 874.50 699.50 421.71 b 186.00 40.00 y 4598.70
2013 29.50 77.50 200.50 18.00 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 307.50
Period of Record Statistics
MEAN 60.77 93.69 184.30 311.39 505.00 653.20 839.00 840.69 661.20 401.03 159.10 70.91 4821.25
S.D. 40.16 50.30 68.44 72.86 80.91 72.21 76.18 68.31 73.02 66.12 61.75 40.44 357.55
SKEW 0.49 0.77 0.48 0.16 0.35 0.43 0.05 0.25 0.07 0.07 0.18 0.78 0.60
MAX 183.50 250.00 374.00 519.00 724.50 888.00 993.50 1028.50 829.50 574.00 298.50 207.50 6167.00
MIN 0.00 10.00 52.00 159.00 318.50 477.50 672.70 684.50 515.00 215.45 45.00 2.00 3953.38
NO YRS 118 115 117 116 115 104 105 102 105 114 114 112 94