HILLSBORO, OREGON

Monthly Total Growing Degree Days

(353908)

Base Temperature = 50 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200305
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
1929 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 f 5.00 5.00
1930 0.00 b 5.19 a 49.00 105.50 107.00 237.50 404.03 a 462.33 b 289.50 56.83 a 21.11 c 0.00 f 1737.99
1931 4.98 c 0.00 b 22.73 a 119.00 322.50 329.48 a 541.98 a 473.00 268.00 78.50 7.00 0.00 2167.18
1932 0.00 21.50 12.50 79.00 169.00 415.50 389.00 494.00 426.11 c 133.50 k 19.29 b 2.30 d 2028.19
1933 5.00 0.00 k 1.00 79.50 88.41 d 312.00 493.50 521.50 197.50 115.00 f 1.00 g 14.98 a 1713.39
1934 1.50 t 0.56 c 101.02 b 259.20 e 171.57 b 279.83 a 472.50 514.00 317.50 146.00 18.50 0.50 2281.17
1935 6.00 1.56 a 0.00 75.00 143.50 278.50 487.00 515.00 356.50 73.50 0.00 0.00 1936.56
1936 0.00 a 0.00 4.13 a 154.82 b 299.50 433.50 499.50 517.00 294.00 151.38 a 0.00 0.00 2353.84
1937 0.00 0.00 a 14.00 25.00 261.00 413.79 a 510.50 451.80 d 347.00 157.30 d 13.50 6.00 2199.89
1938 0.00 0.00 8.00 69.00 277.50 410.17 a 577.50 392.31 b 400.34 a 100.00 2.22 c 5.17 a 2242.22
1939 1.00 0.00 c 42.50 99.00 226.50 280.50 505.50 499.50 350.00 118.32 a 5.56 c 7.23 a 2135.61
1940 5.00 6.50 55.28 a 84.00 318.00 408.62 a 484.00 528.00 383.00 195.00 5.17 a 0.50 2473.08
1941 0.50 0.00 59.00 98.00 203.00 342.41 a 612.00 495.50 229.00 110.50 23.50 4.50 2177.91
1942 0.00 0.00 8.00 71.50 173.50 264.50 526.50 490.50 319.50 128.00 4.00 0.00 1986.00
1943 0.00 1.04 a 11.00 130.00 137.50 298.50 487.00 412.00 435.00 154.00 6.00 0.00 2072.04
1944 0.00 0.00 d 17.00 64.00 204.00 299.00 489.50 446.29 b 397.50 207.00 12.50 0.00 2136.79
1945 2.00 1.50 2.00 61.00 246.50 315.00 524.00 471.00 255.50 112.50 10.50 4.00 2005.50
1946 0.00 0.00 6.00 66.50 282.00 294.00 488.00 481.00 327.00 58.50 2.00 5.00 2010.00
1947 0.00 8.00 58.00 155.50 282.00 306.50 424.50 405.00 357.00 136.50 14.00 0.00 2147.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 476.88 a 431.00 318.00 91.97 a 2.14 b 0.00 a 1319.99
1949 0.00 a 0.00 3.50 107.07 a 300.00 375.52 a 501.00 390.50 g 448.97 a 29.50 40.00 0.00 1805.55
1950 0.00 a 2.00 7.48 b 36.00 169.98 a 387.00 519.77 a 584.00 401.50 101.50 18.50 14.47 a 2242.20
1951 0.53 b 14.00 2.00 128.50 232.50 437.50 567.50 490.00 419.50 142.08 a 5.69 a 3.50 2443.31
1952 0.50 1.50 11.50 117.00 249.00 308.33 c 607.08 a 537.33 a 456.43 b 287.78 a 0.00 b 5.17 a 2581.63
1953 22.73 a 4.00 17.64 b 59.00 156.50 235.50 512.50 507.22 b 410.00 152.00 28.00 0.00 b 2105.10
1954 2.00 0.52 a 0.00 d 41.25 b 240.00 231.21 a 401.45 a 406.10 a 309.50 112.24 b 30.50 0.00 1774.77
1955 0.00 0.00 0.00 21.50 116.50 314.50 397.50 451.00 350.50 127.50 27.00 1.00 1807.00
1956 0.50 0.00 5.50 131.00 313.00 239.50 570.50 510.00 347.00 112.24 b 3.00 7.50 2239.74
1957 0.00 6.50 16.00 105.50 298.00 364.50 472.50 445.37 a 496.50 110.57 a 5.50 0.00 2320.93
1958 6.00 34.50 9.00 70.50 386.50 495.50 713.50 650.50 384.00 217.00 35.50 9.50 3012.00
1959 0.50 4.00 6.50 70.00 160.00 324.50 546.50 427.00 270.50 139.50 23.50 2.00 1974.50
1960 0.00 0.00 25.50 76.50 117.00 393.00 603.00 496.00 385.50 186.00 9.00 2.00 2293.50
1961 15.00 14.00 17.00 60.00 199.00 492.00 614.50 687.00 294.50 143.50 1.00 5.50 2543.00
1962 0.00 1.50 4.50 91.00 77.50 320.50 479.50 469.00 342.50 105.50 18.50 0.00 1910.00
1963 0.00 13.50 7.50 25.50 211.50 321.00 380.00 475.50 452.00 139.00 1.00 g 0.00 2025.50
1964 1.50 0.00 19.00 12.00 106.50 256.50 431.50 367.50 216.50 107.47 a 2.00 1.00 1521.47
1965 3.50 0.50 12.00 76.00 110.50 257.00 516.00 497.50 250.50 153.50 19.00 3.00 1899.00
1966 0.00 0.00 21.50 63.00 185.00 278.50 430.50 427.50 337.50 81.00 13.50 3.00 1841.00
1967 4.50 0.00 2.07 a 3.50 164.00 404.00 557.50 700.00 438.10 a 131.23 a 16.00 2.50 2423.40
1968 9.50 47.50 26.50 42.00 178.00 328.50 508.00 434.00 320.00 68.00 14.00 0.00 1976.00
1969 0.00 0.00 24.00 53.50 274.35 a 482.50 453.00 398.50 339.00 68.50 28.00 0.00 2121.35
1970 9.50 8.50 8.50 12.50 190.50 426.00 519.00 489.00 242.50 91.50 24.00 2.50 2024.00
1971 1.00 2.00 12.50 59.50 214.00 235.00 543.00 594.50 291.00 115.00 2.50 0.00 2070.00
1972 1.00 6.00 68.00 22.50 282.00 368.50 599.00 577.50 277.00 112.50 10.50 14.00 2338.50
1973 0.00 5.00 3.00 51.50 231.00 328.50 550.50 396.00 351.21 a 78.50 5.50 1.00 2001.71
1974 1.50 0.00 22.50 43.50 142.00 392.50 478.50 529.50 452.50 110.50 13.50 8.50 2195.00
1975 3.50 6.00 5.50 9.00 199.00 291.00 517.50 399.50 400.50 97.00 20.50 15.00 1964.00
1976 2.00 1.00 9.00 52.50 185.00 252.50 452.50 438.50 376.00 131.50 35.50 0.00 1936.00
1977 0.00 f 8.00 0.00 102.00 86.00 371.00 427.50 609.00 309.31 a 113.31 b 12.00 17.00 2055.12
1978 0.50 13.50 66.00 58.00 149.32 a 418.45 a 542.50 498.00 293.00 175.50 5.00 0.00 2219.76
1979 0.00 2.00 39.50 76.00 217.50 371.50 527.00 a 467.00 397.76 a 183.00 13.00 4.50 2298.76
1980 0.00 5.00 6.00 114.00 170.00 232.00 490.50 392.00 307.50 135.50 40.50 21.00 1914.00
1981 0.00 16.00 8.00 78.50 179.50 288.00 468.50 596.50 357.00 73.50 19.00 0.50 2085.00
1982 0.00 16.50 3.50 27.50 171.00 400.50 464.00 479.00 322.00 99.00 4.14 a 0.00 1987.14
1983 5.00 7.00 15.50 93.00 276.00 296.50 428.00 484.00 270.00 56.00 24.00 0.00 1955.00
1984 4.50 0.00 29.50 29.00 111.00 281.50 485.00 464.50 290.50 92.50 11.00 0.00 1799.00
1985 0.00 1.00 0.00 97.50 195.00 336.00 609.00 453.50 232.00 75.00 22.00 0.00 2021.00
1986 2.50 32.00 59.00 48.50 194.00 436.50 396.50 625.50 279.00 141.50 12.50 0.00 2227.50
1987 0.00 1.00 16.00 127.50 272.50 419.00 476.00 536.00 394.50 194.00 29.50 2.00 2468.00
1988 0.00 13.98 a 15.00 87.00 157.00 331.00 532.00 460.50 328.00 226.50 20.50 0.00 2171.48
1989 1.50 0.00 2.00 153.00 202.00 402.50 420.50 434.50 395.00 113.00 21.50 3.00 2148.50
1990 2.00 2.50 34.00 121.00 153.50 346.50 581.50 552.00 439.00 66.00 17.50 0.00 2315.50
1991 7.00 18.00 2.50 55.00 110.50 258.50 519.50 556.00 433.50 180.00 20.50 0.50 2161.50
1992 11.00 22.00 62.00 152.00 325.50 468.00 571.50 546.00 306.50 163.50 10.00 0.00 2638.00
1993 2.00 0.00 16.50 53.00 313.00 316.50 368.50 510.50 401.50 182.00 0.00 4.00 2167.50
1994 0.50 0.00 59.00 91.50 259.00 316.00 571.00 515.00 447.50 69.00 0.00 11.50 2340.00
1995 12.50 12.96 a 28.00 55.00 294.50 360.00 593.50 455.50 453.50 102.50 67.50 3.00 2438.46
1996 1.00 4.50 24.00 100.00 148.50 355.00 656.50 565.50 298.50 139.50 4.00 0.50 2297.50
1997 2.50 1.00 25.00 65.00 373.00 372.50 570.00 627.50 429.00 116.50 101.00 0.00 2683.00
1998 2.00 4.00 92.00 142.50 243.00 471.00 688.50 644.50 519.00 175.50 45.00 14.50 3041.50
1999 0.00 2.50 25.00 99.50 181.19 b 339.00 218.00 q 0.00 z 0.00 z 18.00 s 60.50 34.00 741.69
2000 0.00 0.00 25.00 264.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 289.50
2001 0.00 z 0.00 z 0.00 z 0.00 z 315.50 248.28 a 450.00 467.50 312.50 61.50 10.50 f 0.00 m 1855.28
2002 3.00 3.00 0.00 68.00 171.50 403.33 c 407.00 k 278.50 p 185.50 o 118.00 9.00 3.50 779.33
2003 13.00 0.00 43.00 53.00 227.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 336.50
Period of Record Statistics
MEAN 2.57 5.70 21.32 81.23 209.71 342.25 509.63 497.48 350.65 124.35 17.20 3.88 2180.01
S.D. 4.25 9.01 22.56 48.35 72.18 70.15 72.54 73.02 71.52 47.12 17.15 6.12 274.28
SKEW 2.49 2.46 1.54 1.40 0.29 0.30 0.35 0.74 0.09 0.73 2.33 2.49 0.82
MAX 22.73 47.50 101.02 264.50 386.50 495.50 713.50 700.00 519.00 287.78 101.00 34.00 3041.50
MIN 0.00 0.00 0.00 3.50 77.50 231.21 368.50 367.50 197.50 29.50 0.00 0.00 1521.47
NO YRS 70 71 72 72 72 71 70 69 70 69 69 71 61