FOREST GROVE, OREGON

Monthly Total Growing Degree Days

(352997)

Base Temperature = 50 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 0.00 0.00 0.50 137.50 178.00 397.00 0.00 z 50.00 u 7.23 a 7.50 1.50 729.23
1894 1.00 0.00 5.50 32.50 179.28 a 148.50 k 0.00 z 0.00 z 0.00 z 74.29 b 23.50 0.00 a 316.08
1895 0.00 1.17 d 2.50 89.50 169.00 0.00 z 0.00 z 0.00 z 0.00 z 156.50 4.50 1.00 424.17
1896 0.00 9.50 21.00 15.50 110.50 305.00 0.00 z 0.00 z 306.00 113.00 3.00 0.50 884.00
1897 1.50 0.50 1.50 167.00 342.50 326.00 0.00 z 0.00 z 228.10 a 100.50 9.50 3.50 1180.60
1898 0.00 8.00 2.50 77.50 177.50 0.00 z 0.00 z 0.00 z 0.00 z 52.50 2.50 l 0.00 318.00
1899 3.50 0.50 0.00 a 27.00 62.50 0.00 z 0.00 z 0.00 z 0.00 z 53.45 b 37.00 0.50 184.45
1900 0.00 0.00 74.50 86.50 168.00 215.00 m 0.00 z 0.00 z 0.00 z 61.00 0.50 0.00 390.50
1901 0.00 18.48 c 8.02 b 38.00 210.50 0.00 z 0.00 z 0.00 z 0.00 z 254.50 15.00 0.00 544.50
1902 7.00 16.15 b 1.55 a 33.50 181.41 d 0.00 z 0.00 z 0.00 z 0.00 z 161.00 0.50 0.00 401.11
1903 4.00 0.00 1.00 29.50 182.00 395.00 407.00 419.50 267.50 112.00 9.00 0.50 1827.00
1904 0.50 0.00 3.50 152.00 210.50 415.00 477.50 492.00 350.50 157.00 27.00 0.55 c 2286.05
1905 2.07 a 39.50 0.00 z 50.50 u 160.00 294.50 540.50 458.50 288.50 48.50 0.00 0.00 1832.07
1906 0.00 0.00 18.50 152.50 179.50 228.50 630.00 502.41 b 259.82 b 81.00 36.50 0.50 2089.24
1907 0.00 c 6.50 5.17 a 38.50 196.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 246.17
1908 0.00 0.00 16.50 67.50 88.00 0.00 z 0.00 z 397.50 g 297.50 65.62 a 30.00 0.00 565.12
1909 0.00 4.00 2.00 37.00 156.00 310.00 424.00 234.00 p 181.50 l 117.50 16.00 0.00 1066.50
1910 0.00 b 0.00 67.00 86.00 262.00 0.00 z 0.00 z 0.00 z 0.00 z 153.00 5.00 0.00 k 573.00
1911 0.00 0.00 35.50 44.00 99.00 0.00 z 623.50 492.00 215.00 63.50 17.50 0.00 1590.00
1912 0.50 1.50 4.00 26.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 32.50
1913 0.00 e 0.00 r 19.00 48.62 a 249.50 366.11 c 490.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1173.23
1914 0.00 z 0.00 z 62.50 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 302.50 386.50 562.00 349.50 59.00 4.00 0.00 1663.50
1917 0.00 0.00 0.00 21.50 107.50 310.50 580.00 627.00 347.50 185.50 15.50 45.50 2240.50
1918 5.50 0.00 24.50 83.50 130.00 476.00 529.50 511.50 490.00 136.00 0.00 7.50 2394.00
1919 9.00 0.00 23.00 80.00 161.50 280.50 537.00 538.50 345.00 76.00 21.00 0.00 2071.50
1920 0.00 0.00 0.00 25.00 92.00 309.00 511.00 559.00 282.50 101.50 13.50 2.00 1895.50
1921 0.50 8.50 14.00 51.00 186.50 382.00 429.00 487.50 232.50 156.50 21.00 4.00 1973.00
1922 0.00 0.00 0.00 23.50 201.50 424.00 533.50 505.00 360.50 121.33 b 0.00 2.00 2171.33
1923 2.00 0.00 39.00 73.50 183.00 321.50 493.00 565.50 359.50 144.50 7.00 0.00 2188.50
1924 3.00 10.00 0.00 78.50 305.50 380.00 473.00 450.00 312.50 95.50 1.50 4.00 2113.50
1925 4.50 5.50 10.50 107.00 310.50 342.50 551.50 444.00 327.00 118.50 2.00 7.50 2231.00
1926 0.00 7.00 54.00 229.50 197.00 427.00 541.50 493.50 255.00 155.00 17.00 2.50 2379.00
1927 0.00 0.00 4.50 69.00 122.00 377.00 503.00 531.50 278.50 95.50 30.50 3.50 2015.00
1928 0.00 0.00 37.50 42.00 310.50 301.50 511.00 481.50 281.50 85.50 3.00 0.00 2054.00
1929 0.00 0.00 7.50 32.00 186.50 315.00 478.50 509.50 351.11 c 157.50 0.00 1.50 2039.11
1930 0.00 2.50 53.00 96.00 110.50 289.50 454.50 554.00 350.00 68.50 10.00 0.00 1988.50
1931 2.50 0.00 17.05 a 111.50 320.00 336.50 543.00 523.50 296.00 100.50 7.50 0.00 2258.05
1932 0.00 20.50 12.00 82.50 166.50 417.00 406.50 528.00 408.00 156.50 14.00 0.00 2211.50
1933 2.00 0.00 0.50 67.00 79.00 301.00 498.50 559.00 224.00 163.00 5.50 12.00 1911.50
1934 2.50 1.50 76.00 228.00 266.50 338.50 489.50 571.00 345.50 151.00 15.50 0.50 2486.00
1935 5.00 0.00 3.50 69.50 197.50 406.00 506.00 547.00 424.50 112.00 0.00 0.00 2271.00
1936 1.00 0.00 5.50 152.00 292.00 373.50 469.50 516.00 327.41 a 151.00 0.00 0.50 2288.41
1937 0.00 0.00 14.00 8.50 207.50 408.50 532.00 469.50 374.50 179.00 11.50 3.50 2208.50
1938 0.00 0.00 7.00 82.00 234.00 413.00 620.00 444.50 473.00 119.87 a 1.50 9.30 a 2404.17
1939 0.50 0.00 51.50 109.00 238.00 290.50 554.00 564.00 381.72 a 133.00 8.00 4.00 2334.22
1940 0.50 0.50 25.50 75.52 a 308.00 446.00 511.00 583.00 405.00 184.00 0.50 0.00 2539.52
1941 0.00 1.50 61.00 101.00 205.00 324.50 636.50 529.50 256.00 85.00 30.00 6.00 2236.00
1942 0.00 0.00 16.00 88.00 183.50 291.50 559.50 568.00 387.00 140.50 3.50 0.00 2237.50
1943 0.00 0.50 6.00 123.00 159.50 299.50 524.00 434.50 448.00 147.50 4.00 0.00 2146.50
1944 0.00 0.50 18.50 64.00 214.00 330.50 523.50 493.00 415.50 172.50 9.00 1.00 2242.00
1945 6.50 2.50 1.00 56.50 257.00 325.50 559.50 550.00 284.00 136.00 9.00 1.00 2188.50
1946 0.00 0.00 5.00 69.00 276.00 291.00 507.50 529.50 308.00 44.50 0.50 2.00 2033.00
1947 0.00 3.50 55.00 144.00 339.00 294.00 460.50 441.50 384.50 105.00 9.00 0.00 2236.00
1948 0.00 2.50 12.50 24.50 186.50 484.50 459.00 433.00 315.50 77.00 3.50 0.00 1998.50
1949 0.00 0.00 4.00 103.50 286.00 358.50 467.00 498.00 404.50 38.00 37.50 b 0.00 2197.00
1950 0.00 1.00 9.50 37.00 172.50 359.50 523.00 573.00 386.50 104.50 32.00 14.00 2212.50
1951 1.00 12.50 2.00 130.50 230.50 429.00 554.90 a 491.00 420.50 133.00 4.50 0.00 2409.40
1952 0.00 0.52 a 9.00 102.00 238.70 a 307.76 a 561.00 492.00 402.50 264.00 0.00 0.00 2377.48
1953 12.50 1.50 11.50 50.50 129.50 186.50 434.00 449.50 347.07 a 125.00 24.50 1.00 1773.07
1954 0.00 0.50 0.00 52.00 226.00 250.50 384.50 387.50 288.00 92.00 29.50 0.00 b 1710.50
1955 0.00 a 0.50 0.00 12.50 113.00 318.00 362.70 a 424.00 313.50 117.50 23.00 2.00 1686.70
1956 2.00 0.00 4.00 117.50 306.00 259.50 564.00 503.50 332.50 95.50 0.00 6.00 2190.50
1957 0.00 9.00 11.00 101.38 a 285.50 326.90 a 401.00 374.50 447.50 99.72 a 2.50 0.50 2059.49
1958 4.50 26.50 10.00 66.50 345.50 449.50 625.00 592.00 358.50 161.00 32.50 15.00 2686.50
1959 0.00 4.50 5.00 74.50 168.50 353.50 579.50 473.00 299.00 163.00 26.50 0.00 b 2147.00
1960 0.00 0.00 40.00 84.50 141.00 391.50 584.00 480.00 393.50 186.50 8.00 0.50 2309.50
1961 8.50 16.50 15.50 81.50 202.00 492.00 599.50 661.50 305.50 162.50 2.00 4.50 2551.50
1962 0.00 2.00 4.50 102.00 100.50 330.50 506.00 487.00 429.00 151.50 39.50 3.00 2155.50
1963 0.00 31.50 10.00 54.00 230.00 323.50 398.50 510.00 453.50 166.00 3.50 0.00 2180.50
1964 0.00 0.00 18.50 23.00 147.50 304.00 499.50 450.00 336.50 166.50 6.50 3.50 1955.50
1965 5.50 4.00 28.50 123.00 152.00 345.50 591.00 574.50 334.50 229.00 39.00 2.00 2428.50
1966 0.00 0.00 37.50 95.00 253.00 353.00 502.89 d 542.00 436.00 153.50 26.50 2.50 2401.89
1967 7.50 2.00 5.00 8.00 207.00 481.50 582.50 718.50 494.00 147.50 17.00 1.00 2671.50
1968 7.50 42.50 33.00 57.00 211.00 363.50 573.50 488.50 379.50 89.00 11.50 0.00 2256.50
1969 0.00 0.00 26.50 51.50 313.10 a 519.50 512.50 475.50 419.50 78.00 27.50 0.00 2423.60
1970 7.00 1.00 7.48 b 23.50 212.50 479.00 577.00 585.00 299.00 119.00 25.00 0.50 2335.98
1971 0.00 1.50 6.00 60.00 251.00 252.50 582.50 642.50 319.00 138.00 4.00 0.00 2257.00
1972 1.50 9.50 67.50 23.00 311.50 382.50 649.00 647.00 311.00 155.50 18.50 11.00 2587.50
1973 0.00 4.50 4.50 67.50 252.00 363.00 600.50 463.50 426.00 86.50 6.00 0.50 2274.50
1974 5.00 0.00 30.00 54.50 153.00 430.50 524.50 592.50 529.50 173.00 10.50 8.50 2511.50
1975 3.50 4.50 9.00 15.50 209.25 a 334.50 563.00 442.50 455.50 100.00 20.00 18.50 2175.75
1976 3.50 0.00 8.50 60.50 233.50 271.61 b 498.50 427.00 363.50 123.00 28.50 0.00 2018.11
1977 0.00 10.00 3.50 103.00 99.50 362.50 426.00 598.00 248.00 44.50 8.00 5.00 1908.00
1978 0.00 10.00 52.50 47.00 118.50 403.00 548.00 506.00 265.50 156.50 2.50 0.00 2109.50
1979 0.00 0.00 30.00 70.00 217.50 347.50 520.50 465.00 390.00 209.50 10.00 1.00 2261.00
1980 0.00 5.00 3.50 120.50 186.50 253.50 538.50 439.00 355.00 167.50 36.50 18.50 2124.00
1981 0.00 12.00 6.50 79.00 132.94 e 283.00 487.00 631.50 371.50 63.50 14.00 0.00 2080.94
1982 0.00 16.50 3.00 29.50 205.00 418.00 471.50 540.50 375.00 90.00 2.00 0.00 2151.00
1983 1.00 9.50 12.00 84.50 266.50 294.00 446.50 520.00 266.00 63.50 19.50 0.00 a 1983.00
1984 0.50 0.00 26.00 26.50 125.00 282.50 513.00 500.50 306.00 90.00 1.55 a 0.00 1871.55
1985 0.00 0.50 2.00 104.00 209.50 356.50 672.00 496.00 251.00 93.50 24.00 0.00 2209.00
1986 1.00 39.93 a 56.00 64.50 213.50 479.00 417.00 679.00 303.00 164.00 4.00 0.00 2420.93
1987 0.00 0.00 z 19.50 150.50 0.00 z 0.00 z 507.00 598.50 441.21 a 0.00 z 37.00 1.50 1755.21
1988 0.00 19.68 a 24.00 84.00 169.00 332.00 563.00 522.50 376.00 252.00 18.50 1.00 2361.68
1989 1.00 0.00 6.50 169.50 247.00 440.00 469.00 493.50 444.50 128.00 34.00 4.00 2437.00
1990 3.50 3.00 37.00 135.50 153.00 328.00 609.00 565.00 398.50 52.50 13.00 0.00 2298.00
1991 2.00 14.50 3.50 61.00 134.00 303.50 602.00 627.00 475.00 203.50 24.00 0.00 2450.00
1992 10.00 28.50 83.50 189.00 418.00 588.00 656.00 648.00 390.50 227.00 16.50 0.00 3255.00
1993 1.50 0.00 27.00 67.50 396.50 386.00 427.50 610.50 473.00 188.50 0.00 2.50 2580.50
1994 2.00 1.00 46.00 107.50 320.50 378.50 663.50 599.50 500.00 67.50 0.00 6.00 2692.00
1995 10.00 8.00 l 31.50 59.50 357.50 403.50 683.50 518.50 478.00 110.50 63.50 3.50 2719.50
1996 0.00 2.50 19.50 102.50 134.50 341.50 676.50 575.50 284.50 130.00 7.24 a 1.50 2275.74
1997 7.50 0.00 22.50 66.00 386.00 345.50 561.00 641.00 435.00 103.50 23.00 0.00 2591.00
1998 0.50 0.00 58.00 95.50 182.00 412.00 658.00 613.50 489.00 124.00 12.50 11.50 2656.50
1999 0.00 0.00 6.72 a 60.00 142.50 296.50 525.00 608.50 424.50 132.00 53.50 1.00 2250.22
2000 0.00 0.00 5.00 123.50 185.50 383.50 465.50 455.50 298.00 68.00 1.00 0.00 1985.50
2001 0.00 a 0.00 17.00 47.50 239.50 272.59 a 440.00 579.00 439.00 113.00 30.00 a 0.00 2177.59
2002 2.50 3.00 0.00 96.00 185.50 447.00 656.50 597.00 428.00 136.50 34.50 5.00 2591.50
2003 8.00 0.00 35.00 48.00 209.50 462.00 639.50 581.50 466.00 244.00 0.00 0.00 2693.50
2004 0.00 0.00 57.50 139.00 272.50 460.50 679.00 670.00 337.50 192.00 6.00 1.50 2815.50
2005 13.00 0.00 49.50 86.50 290.00 317.50 584.50 608.50 313.50 132.50 5.00 0.00 h 2400.50
2006 0.00 0.00 e 8.50 97.00 250.00 407.00 598.00 516.50 388.00 105.00 10.56 c 0.50 2381.06
2007 0.00 0.00 30.48 a 49.00 205.00 321.00 577.00 500.00 318.50 44.50 6.50 2.67 b 2054.66
2008 0.00 2.50 3.50 33.50 221.50 0.00 z 520.00 558.00 388.50 100.00 39.00 2.50 1869.00
2009 0.00 0.00 2.50 64.50 219.00 381.50 646.00 540.00 402.50 92.00 1.50 2.00 2351.50
2010 0.00 0.00 21.00 42.00 131.50 264.00 507.00 513.00 371.50 132.50 34.50 8.00 2025.00
2011 7.50 0.00 7.00 11.50 81.50 281.50 428.00 535.50 457.50 130.50 0.50 0.00 1941.00
2012 0.00 e 0.00 3.50 95.17 a 180.50 274.50 500.00 564.50 399.50 138.97 b 30.50 1.00 y 2187.14
2013 0.00 0.00 33.00 8.00 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 33.00
Period of Record Statistics
MEAN 1.75 4.58 18.94 75.51 207.16 353.39 529.00 530.69 362.17 125.05 14.48 2.70 2245.91
S.D. 2.97 8.70 19.95 44.39 73.49 72.08 76.18 68.31 72.17 50.05 13.45 5.60 254.01
SKEW 1.89 2.63 1.30 0.95 0.50 0.44 0.05 0.25 0.08 0.40 0.97 4.71 0.66
MAX 13.00 42.50 83.50 229.50 418.00 588.00 683.50 718.50 529.50 264.00 63.50 45.50 3255.00
MIN 0.00 0.00 0.00 0.50 62.50 178.00 362.70 374.50 215.00 7.23 0.00 0.00 1686.70
NO YRS 118 115 117 116 115 104 105 102 105 114 114 112 94