ST HELENS RFD, OREGON

Monthly Total Growing Degree Days

(357466)

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
1976 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 757.29 c 677.00 441.00 248.50 54.50 2178.29
1977 35.81 b 167.00 160.50 390.50 423.50 699.50 779.00 971.50 620.00 428.00 172.00 114.50 4961.81
1978 94.00 0.00 z 313.00 348.50 478.95 a 767.50 888.67 a 846.00 635.00 506.50 110.00 33.00 5021.12
1979 4.50 85.00 310.50 344.50 595.00 696.50 901.50 847.00 0.00 z 0.00 z 151.50 145.00 4081.00
1980 23.50 108.75 a 170.50 e 368.04 b 442.86 c 414.00 g 575.00 k 756.83 b 687.32 b 371.00 g 209.00 97.00 f 2766.79
1981 95.50 g 92.00 h 285.89 d 374.48 a 502.72 a 614.42 d 588.50 g 735.00 h 720.52 a 387.50 c 180.50 g 69.50 g 2885.53
1982 57.00 127.00 170.50 245.00 546.50 753.50 764.50 834.00 687.00 456.50 115.00 77.50 e 4834.00
1983 76.50 h 167.00 316.50 362.00 624.00 638.00 783.50 863.00 601.00 388.00 225.00 c 45.47 a 5013.47
1984 112.00 137.00 320.50 284.50 473.50 624.50 882.50 855.00 682.50 358.00 158.50 11.50 4900.00
1985 8.00 71.50 183.00 412.50 554.38 a 727.00 1007.00 861.50 602.00 381.50 103.20 e 11.00 4922.58
1986 116.50 153.50 405.00 328.00 541.50 801.00 767.00 993.50 0.00 z 517.50 194.50 47.50 4865.50
1987 49.50 173.50 299.00 445.00 641.50 790.00 824.00 953.00 788.50 607.00 264.50 75.00 5910.50
1988 36.00 164.50 243.00 397.00 511.50 b 696.00 913.50 910.50 731.50 604.00 209.50 77.50 5494.50
1989 97.50 37.00 166.50 454.50 558.00 757.50 806.00 811.50 802.50 481.00 263.00 77.00 5312.00
1990 107.50 90.50 323.00 463.50 508.00 715.50 969.50 965.00 844.50 403.50 199.50 44.00 5634.00
1991 71.00 231.50 197.00 358.50 485.50 633.00 937.00 917.50 846.50 513.00 249.31 a 87.50 5527.31
1992 128.00 128.00 m 415.00 491.67 c 754.50 830.50 965.50 947.00 685.71 b 545.00 183.50 38.00 5984.38
1993 52.70 a 83.50 282.00 363.50 701.00 669.50 741.50 896.00 788.50 534.50 69.00 81.50 5263.20
1994 96.50 j 27.00 331.00 439.00 673.00 702.50 976.00 917.00 837.00 404.50 58.50 108.00 5473.50
1995 123.50 228.50 256.00 341.50 670.00 734.00 960.00 855.50 864.00 439.00 299.00 88.35 a 5859.35
1996 71.00 128.00 272.00 412.00 515.50 755.00 1041.00 971.50 682.00 431.00 173.50 94.00 5546.50
1997 74.50 148.50 214.00 343.50 707.50 683.00 677.50 g 996.00 399.50 n 435.55 a 261.00 42.50 3906.05
1998 123.50 179.00 319.00 401.50 511.50 752.00 986.00 992.00 837.00 476.50 212.50 97.50 5888.00
1999 98.54 c 101.63 a 204.27 c 393.00 461.26 b 621.96 b 855.37 d 990.81 e 602.50 i 460.83 e 199.04 d 76.00 4462.70
2000 19.12 a 90.35 c 150.72 b 431.25 b 505.76 d 775.50 870.00 939.19 d 768.33 c 333.50 g 124.14 a 27.38 a 4701.74
2001 71.82 a 88.31 b 239.22 a 308.33 c 486.50 i 653.57 b 835.85 d 925.72 b 545.00 h 369.50 f 149.50 g 51.00 g 3122.82
2002 34.50 k 93.00 h 110.00 o 308.50 510.00 733.89 c 955.50 901.00 463.00 k 460.00 187.50 86.00 4142.39
2003 136.00 117.50 191.50 g 303.00 537.50 816.00 994.00 936.09 c 749.40 e 553.02 c 76.50 p 60.85 d 5203.36
2004 25.50 m 84.00 n 346.74 d 479.00 483.94 d 769.20 e 769.00 g 930.50 387.00 k 465.60 e 57.50 j 58.50 h 3474.98
2005 0.00 z 102.67 d 313.00 267.50 g 635.00 483.00 g 956.00 766.50 f 382.00 l 321.50 k 129.00 68.00 2203.67
2006 116.50 f 76.09 e 195.50 415.00 0.00 z 489.00 k 861.00 825.50 688.50 271.50 g 140.00 c 25.50 3227.09
2007 19.63 a 74.50 219.50 174.00 f 485.00 593.57 b 862.00 768.28 a 602.59 a 345.13 a 134.50 52.04 c 4156.74
2008 27.00 81.00 61.00 166.50 482.29 e 550.38 d 591.50 h 810.50 679.00 139.00 w 201.35 d 25.32 a 3084.34
2009 23.00 39.00 73.22 b 217.00 498.58 a 626.90 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1477.70
2010 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 508.80 e 748.17 e 844.75 e 603.50 417.50 154.00 61.50 3338.22
2011 70.50 19.04 c 133.00 135.52 a 365.91 c 552.32 b 710.86 b 646.00 f 608.00 f 339.34 c 96.43 b 24.44 e 2447.36
2012 35.02 d 54.98 e 109.65 d 274.62 d 459.04 e 387.50 i 581.50 h 595.00 i 438.00 k 303.00 g 203.04 b 52.24 d 1188.58
2013 23.25 e 43.50 f 174.67 e 18.50 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 197.92
Period of Record Statistics
MEAN 65.86 111.78 240.41 357.60 540.75 695.08 880.77 893.45 719.67 456.45 178.09 62.82 5388.75
S.D. 40.78 55.00 88.53 84.50 90.08 81.62 91.87 71.28 85.44 71.64 59.97 31.48 390.11
SKEW 0.19 0.38 -0.08 -0.78 0.66 -0.42 -0.15 -0.29 0.20 0.39 -0.07 0.39 -0.11
MAX 136.00 231.50 415.00 491.67 754.50 830.50 1041.00 996.00 864.00 607.00 299.00 145.00 5910.50
MIN 4.50 19.04 61.00 135.52 365.91 508.80 710.86 756.83 601.00 339.34 58.50 11.00 4834.00
NO YRS 29 30 34 33 33 32 29 32 26 28 32 32 13