HILLSBORO, OREGON

Monthly Total Growing Degree Days

(353908)

Base Temperature = 40 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 46.50 f 103.50 103.50
1930 9.09 b 124.44 a 247.50 389.50 389.50 537.50 714.03 a 772.33 b 584.50 308.45 a 142.22 c 19.50 f 4219.06
1931 114.04 c 53.31 b 210.80 a 387.50 632.00 629.48 a 851.98 a 783.00 568.00 356.50 104.50 43.50 4734.61
1932 34.50 93.50 191.50 325.00 470.50 715.50 699.00 804.00 726.11 c 313.50 k 193.39 b 70.04 d 4323.04
1933 69.50 28.00 k 143.00 319.00 371.43 d 612.00 803.50 831.50 495.50 344.00 f 75.50 g 164.82 a 3810.24
1934 61.50 t 140.00 c 391.24 b 559.20 e 481.57 b 576.72 a 782.50 824.00 612.00 440.50 222.50 63.50 5093.73
1935 55.00 92.30 a 53.50 298.50 439.00 578.50 797.00 825.00 656.50 282.00 63.50 50.50 4191.30
1936 88.35 a 38.00 104.88 a 395.89 b 609.50 733.50 809.50 827.00 594.00 430.38 a 66.00 84.50 4781.51
1937 0.00 60.15 a 230.00 274.50 570.50 713.79 a 820.50 761.80 d 643.50 457.54 d 227.50 113.00 4872.77
1938 52.50 64.50 160.00 351.00 574.00 710.17 a 887.50 702.31 b 700.34 a 399.00 90.56 c 82.15 a 4774.03
1939 78.00 32.48 c 213.00 365.00 534.00 580.00 815.50 809.50 650.00 398.35 a 135.00 c 152.93 a 4763.76
1940 67.50 161.50 310.00 a 373.50 628.00 708.62 a 794.00 838.00 683.00 486.00 113.28 a 107.00 5270.40
1941 90.00 138.00 340.50 379.50 506.00 642.41 a 922.00 805.50 529.00 413.00 188.00 88.00 5041.91
1942 26.00 59.50 124.50 320.50 457.50 564.50 836.50 800.50 619.50 413.00 107.50 85.00 4414.50
1943 9.50 93.85 a 133.00 408.50 435.50 598.50 797.00 722.00 735.00 425.00 118.00 50.00 4525.85
1944 41.50 60.32 d 149.50 305.00 501.50 599.00 799.50 756.29 b 697.50 515.50 129.00 39.00 4593.61
1945 104.50 113.00 139.00 285.00 556.50 615.00 834.00 781.00 554.00 370.00 142.50 103.00 4597.50
1946 54.00 60.50 195.00 310.50 592.00 594.00 798.00 791.00 627.00 320.50 93.50 118.50 4554.50
1947 43.00 142.50 297.00 435.50 592.00 606.50 734.50 715.00 657.00 438.50 178.00 47.00 4886.50
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 786.88 a 741.00 617.00 359.60 a 96.43 b 21.18 a 2622.10
1949 0.00 a 65.50 177.00 384.83 a 603.00 675.52 a 811.00 630.50 g 748.97 a 250.50 264.00 70.00 4050.31
1950 4.65 a 103.50 138.43 b 252.50 455.18 a 687.00 829.77 a 894.00 699.00 343.00 170.00 198.40 a 4775.43
1951 49.17 b 102.50 99.50 409.50 539.00 737.50 877.50 800.00 719.50 421.08 a 161.38 a 37.00 4953.64
1952 27.50 67.00 138.00 387.00 542.00 608.33 c 917.08 a 847.33 a 756.43 b 594.17 a 73.93 b 60.45 a 5019.22
1953 226.82 a 104.00 174.24 b 275.50 456.00 535.50 822.50 817.22 b 710.00 453.00 240.50 96.74 b 4912.02
1954 47.50 95.93 a 135.48 d 280.18 b 545.00 531.21 a 711.45 a 716.10 a 609.50 381.62 b 271.00 55.50 4380.46
1955 23.50 41.50 71.00 176.50 402.00 614.50 707.50 761.00 650.50 410.00 162.00 60.00 4080.00
1956 81.00 17.00 156.50 402.00 618.00 539.50 880.50 820.00 647.00 357.03 b 106.00 109.50 4734.03
1957 7.00 104.00 230.00 380.50 608.00 664.50 782.50 755.37 a 796.50 410.75 a 124.50 117.00 4980.62
1958 128.00 250.00 176.50 331.00 696.50 795.50 1023.50 960.50 682.00 515.50 205.00 153.50 5917.50
1959 115.50 83.50 188.00 338.50 444.00 624.50 856.50 737.00 570.00 424.00 143.00 46.50 4571.00
1960 22.50 70.50 184.00 292.50 402.00 693.00 913.00 806.00 685.50 476.50 180.00 52.50 4778.00
1961 161.50 184.50 228.50 304.00 502.50 792.00 924.50 997.00 593.50 396.00 106.00 104.50 5294.50
1962 66.50 114.50 146.50 359.50 375.00 617.50 789.50 779.00 642.50 394.50 210.00 69.00 4564.00
1963 19.50 207.50 145.00 232.00 505.50 621.00 690.00 785.50 752.00 402.50 124.50 g 54.00 4414.50
1964 68.50 58.50 128.50 205.00 363.00 556.50 741.50 677.50 516.50 386.98 a 80.00 88.00 3870.48
1965 58.00 87.00 202.00 307.50 376.00 556.00 826.00 807.50 547.00 451.00 229.00 59.50 4506.50
1966 46.50 64.00 169.50 325.50 473.50 576.00 740.50 737.50 637.50 340.50 226.50 123.00 4460.50
1967 101.50 90.00 112.63 a 164.00 454.00 704.00 867.50 1010.00 738.10 a 430.90 a 220.50 108.00 5001.14
1968 96.00 245.00 259.50 243.00 477.50 628.50 818.00 744.00 620.00 346.00 184.00 48.00 4709.50
1969 10.00 49.00 207.00 297.00 569.88 a 782.50 763.00 708.50 639.00 351.50 187.50 96.00 4660.88
1970 114.50 185.50 220.50 218.00 482.50 726.00 829.00 799.00 540.50 362.50 195.50 52.50 4726.00
1971 93.00 105.00 141.00 292.00 513.50 535.00 853.00 904.50 587.50 338.50 149.00 35.00 4547.00
1972 66.50 127.50 270.00 210.50 592.00 668.50 909.00 887.50 565.50 367.00 197.00 112.00 4973.00
1973 58.50 146.00 181.50 306.50 528.50 628.50 860.50 706.00 651.21 a 375.00 113.00 136.50 4691.71
1974 113.00 74.00 220.00 308.50 431.00 692.50 788.50 839.50 752.50 407.00 188.50 133.50 4948.50
1975 99.50 76.50 155.00 196.50 500.50 591.00 827.50 709.50 700.50 378.00 148.50 127.00 4510.00
1976 100.00 68.50 125.00 276.50 484.50 550.00 762.50 748.50 676.00 418.00 212.50 27.50 4449.50
1977 39.00 f 126.50 121.50 357.00 387.00 671.00 737.50 919.00 609.31 a 405.67 b 151.50 126.00 4611.98
1978 103.00 183.00 301.00 308.50 447.95 a 718.45 a 852.50 808.00 593.00 449.00 80.50 27.50 4872.40
1979 7.50 104.00 271.50 324.00 524.50 671.50 837.00 a 777.00 697.76 a 476.50 128.50 136.00 4955.76
1980 21.00 104.00 171.50 367.00 476.00 532.00 800.50 702.00 607.50 409.50 207.00 139.50 4537.50
1981 89.50 125.50 230.00 310.50 475.00 588.00 778.50 906.50 657.00 367.00 216.50 103.50 4847.50
1982 53.50 111.00 150.00 201.50 467.00 700.50 774.00 789.00 621.50 382.00 109.66 a 71.50 4431.16
1983 115.00 170.00 284.50 330.00 576.50 596.50 738.00 794.00 570.00 344.00 241.50 40.00 4800.00
1984 120.00 108.00 275.50 253.50 405.00 581.50 795.00 774.50 590.50 304.00 144.50 7.50 4359.50
1985 2.50 50.00 111.00 352.50 482.50 636.00 919.00 763.50 532.00 335.50 83.50 10.00 4278.00
1986 85.00 131.50 335.50 279.50 479.50 736.50 706.50 935.50 579.00 451.00 189.00 34.50 4943.00
1987 67.50 130.50 236.50 385.00 582.50 719.00 786.00 846.00 694.50 502.00 228.00 71.50 5249.00
1988 32.50 136.71 a 195.50 339.50 445.00 631.00 842.00 770.50 628.00 529.50 190.50 53.50 4794.21
1989 73.50 31.50 167.50 435.00 512.00 702.50 730.50 744.50 695.00 391.50 201.00 60.50 4745.00
1990 95.00 86.00 258.00 399.50 457.00 646.50 891.50 862.00 739.00 342.50 160.00 36.50 4973.50
1991 65.00 217.00 136.50 296.50 408.50 558.50 829.50 866.00 733.50 426.50 186.00 65.00 4788.50
1992 105.00 234.50 350.00 417.50 633.50 768.00 881.50 856.00 606.50 460.00 160.50 27.00 5500.00
1993 42.50 62.50 256.00 331.50 622.00 616.50 678.50 820.50 701.50 488.50 47.00 80.00 4747.00
1994 124.50 48.00 292.00 369.00 569.00 616.00 881.00 825.00 747.50 338.00 42.00 110.50 4962.50
1995 134.00 200.67 a 217.50 284.50 604.50 660.00 903.50 765.50 753.50 386.00 299.50 99.00 5308.17
1996 89.50 123.50 230.00 375.00 445.00 655.00 966.50 875.50 598.50 390.00 146.50 74.50 4969.50
1997 82.00 98.00 205.50 317.50 680.50 672.50 880.00 937.50 729.00 406.50 386.00 74.00 5469.00
1998 157.00 188.50 320.00 429.50 553.00 771.00 998.50 954.50 819.00 470.00 305.50 134.00 6100.50
1999 101.00 148.00 205.50 347.00 476.22 b 639.00 358.00 q 0.00 z 0.00 z 128.50 s 305.50 241.50 2463.72
2000 46.50 123.50 272.50 557.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1000.00
2001 0.00 z 0.00 z 0.00 z 0.00 z 625.50 548.28 a 760.00 777.50 612.50 287.00 143.50 f 12.00 m 3610.78
2002 37.50 70.00 94.50 331.00 463.00 703.33 c 607.00 k 428.50 p 335.50 o 390.50 189.50 103.50 2382.83
2003 152.00 122.00 257.00 304.00 526.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1361.50
Period of Record Statistics
MEAN 70.64 109.16 199.46 328.38 508.41 642.07 819.63 807.48 650.00 401.88 167.53 83.74 4797.53
S.D. 45.24 53.32 71.39 74.02 79.67 70.31 72.54 73.02 72.05 62.36 67.11 44.16 383.68
SKEW 0.59 0.77 0.43 0.41 0.21 0.30 0.35 0.74 0.09 0.31 0.53 0.85 0.82
MAX 226.82 250.00 391.24 559.20 696.50 795.50 1023.50 1010.00 819.00 594.17 386.00 241.50 6100.50
MIN 0.00 17.00 53.50 164.00 363.00 531.21 678.50 677.50 495.50 250.50 42.00 7.50 3870.48
NO YRS 70 71 72 72 72 71 70 69 70 69 69 71 61