SILVERTON, OREGON

Monthly Total Growing Degree Days

(357823)

Base Temperature = 40 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1962 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 75.00 z 691.50 399.00 232.00 69.00 k 1322.50
1963 32.00 242.50 165.00 223.00 493.50 593.00 676.50 793.00 746.00 461.00 206.00 77.00 4708.50
1964 84.00 49.50 118.00 219.50 377.00 550.50 762.00 734.00 568.00 437.00 120.00 96.00 4115.50
1965 57.50 88.50 220.50 333.50 387.00 562.00 836.00 818.00 585.00 476.00 226.50 72.00 4662.50
1966 56.00 59.50 156.50 341.00 481.50 621.00 754.00 815.00 666.00 387.00 210.50 160.50 4708.50
1967 133.50 94.50 132.00 177.00 471.50 713.00 863.50 992.00 776.00 423.00 191.50 106.00 5073.50
1968 89.50 233.00 240.00 222.00 444.00 612.00 818.50 760.50 608.00 352.00 187.50 46.00 4613.00
1969 25.00 45.50 199.50 268.50 551.50 721.50 757.00 741.50 655.00 327.00 184.50 104.50 4581.00
1970 106.00 168.00 197.50 198.50 447.50 716.00 817.00 790.50 542.00 360.00 193.00 51.50 4587.50
1971 87.50 76.50 105.50 234.00 465.00 509.00 799.50 873.50 556.50 322.00 123.50 25.00 4177.50
1972 61.00 136.00 240.50 183.50 524.00 619.00 889.00 892.00 583.50 368.00 189.50 122.50 4808.50
1973 70.00 119.50 193.00 310.50 535.78 a 633.50 850.00 718.50 665.00 367.50 119.50 117.00 4699.78
1974 95.00 61.00 198.00 271.00 404.50 654.00 780.00 848.50 814.00 448.00 191.50 123.00 4888.50
1975 119.00 66.00 114.50 178.00 489.00 602.50 832.50 711.50 739.00 402.00 155.50 129.00 4538.50
1976 87.00 64.00 114.00 232.50 463.50 547.00 773.50 738.50 682.50 419.00 223.50 32.50 4377.50
1977 47.50 130.00 113.50 342.00 366.00 647.00 763.50 958.00 600.50 421.50 184.50 119.50 4693.50
1978 85.50 167.00 300.00 289.00 433.00 714.00 837.50 812.00 602.50 469.50 98.50 40.50 4849.00
1979 10.50 109.50 276.00 313.00 521.00 677.50 857.50 789.00 733.50 516.50 114.50 143.50 5062.00
1980 41.00 127.00 163.00 355.50 470.50 540.50 815.00 730.00 664.00 447.50 218.00 137.50 4709.50
1981 64.00 133.00 253.00 331.00 480.50 571.50 793.50 926.00 691.50 380.50 216.50 107.00 4948.00
1982 57.50 113.00 160.50 192.50 469.50 691.00 771.50 820.50 641.50 438.50 114.50 108.00 4578.50
1983 114.00 179.00 279.00 306.50 558.50 589.00 718.00 836.00 588.50 383.00 233.00 52.50 4837.00
1984 152.00 154.00 271.50 234.00 422.00 547.00 791.50 817.50 632.00 330.50 158.00 18.00 4528.00
1985 1.50 0.00 z 134.50 358.00 493.50 647.00 936.00 787.50 572.50 400.00 98.50 21.00 4450.00
1986 119.50 158.00 356.00 279.50 501.50 764.00 729.50 946.00 577.50 458.50 205.00 50.50 5145.50
1987 82.00 0.00 z 249.50 420.00 585.00 720.50 779.50 855.00 720.00 555.50 254.00 88.50 5309.50
1988 55.50 134.50 211.50 346.00 462.50 611.50 849.50 823.00 689.00 538.00 226.50 62.00 a 5009.50
1989 87.50 49.50 200.50 449.00 502.00 703.00 748.50 768.00 726.00 407.00 219.00 75.50 4935.50
1990 109.50 83.00 0.00 z 407.50 481.50 654.00 910.50 881.50 771.00 376.00 234.00 51.50 4960.00
1991 79.00 239.50 159.50 292.50 414.50 537.50 853.00 866.00 750.50 468.00 213.00 61.50 4934.50
1992 138.50 210.00 355.50 408.50 697.00 787.00 889.00 886.00 642.50 493.50 174.50 34.00 5716.00
1993 45.50 64.00 267.50 328.50 600.00 616.00 695.50 833.50 709.00 511.00 57.50 93.00 4821.00
1994 131.00 77.00 288.50 363.00 558.50 604.50 881.00 823.00 763.50 373.50 59.00 122.00 5044.50
1995 147.50 223.50 224.00 281.00 562.00 646.50 869.00 762.50 741.00 401.50 325.00 110.50 5294.00
1996 110.00 137.00 229.50 368.50 410.00 612.00 914.00 854.50 590.50 392.50 179.00 87.50 4885.00
1997 94.50 97.50 206.50 281.00 649.00 623.00 796.50 889.00 693.00 359.00 258.00 36.00 4983.00
1998 150.50 155.50 231.00 319.50 448.50 624.00 866.00 852.50 732.00 393.00 224.00 97.13 a 5093.63
1999 87.00 99.00 146.50 270.50 403.00 569.50 767.50 839.00 683.50 430.50 266.50 100.23 a 4662.73
2000 33.07 a 97.00 135.00 353.00 477.00 678.50 775.50 780.50 654.00 405.00 88.50 57.00 4534.07
2001 50.00 76.50 216.00 256.00 530.00 575.69 a 780.50 833.38 a 682.00 394.73 a 239.50 52.50 4686.81
2002 72.50 104.00 123.00 315.50 425.00 680.00 870.00 838.00 695.00 401.00 216.00 118.00 4858.00
2003 167.00 111.50 266.50 265.00 477.00 734.00 904.50 862.50 734.50 530.50 112.00 72.50 5237.50
2004 63.00 124.00 291.50 399.50 542.50 688.50 908.00 903.00 623.00 457.00 133.50 90.00 5223.50
2005 102.50 86.00 285.00 331.50 567.00 577.00 870.50 892.00 623.00 447.00 102.50 102.00 4986.00
2006 138.50 87.00 152.00 339.00 0.00 z 710.50 900.50 820.00 692.00 378.00 201.50 65.00 4484.00
2007 40.00 120.50 270.50 287.50 493.00 621.00 885.50 822.00 631.50 340.50 116.00 71.00 4699.00
2008 31.50 86.50 106.00 184.50 499.50 562.00 843.50 847.50 670.00 375.50 233.00 48.50 4488.00
2009 59.50 50.00 119.00 278.00 513.50 681.50 936.00 850.50 719.00 380.00 194.50 63.00 4844.50
2010 172.00 166.00 207.50 266.00 401.00 561.50 798.00 808.50 670.50 437.00 193.00 119.50 4800.50
2011 111.50 57.00 166.50 183.50 364.00 575.50 734.00 838.50 757.50 414.00 106.00 32.50 4340.50
2012 84.00 85.50 112.50 344.00 461.00 566.50 779.50 875.00 705.00 448.00 221.00 86.50 4768.50
2013 37.50 85.50 215.50 22.00 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 338.50
Period of Record Statistics
MEAN 83.85 115.95 202.76 294.64 485.21 631.27 820.56 831.09 671.58 417.68 181.23 81.16 4798.64
S.D. 40.96 52.47 66.81 68.99 69.80 65.94 63.98 61.03 65.55 55.06 58.10 35.48 294.35
SKEW 0.23 0.86 0.30 0.04 0.62 0.33 -0.10 0.20 -0.09 0.56 -0.28 0.08 0.30
MAX 172.00 242.50 356.00 449.00 697.00 787.00 936.00 992.00 814.00 555.50 325.00 160.50 5716.00
MIN 1.50 45.50 105.50 177.00 364.00 509.00 676.50 711.50 542.00 322.00 57.50 18.00 4115.50
NO YRS 51 49 50 50 49 50 50 50 51 51 51 50 46