ICE HARBOR DAM, WASHINGTON

Monthly Total Growing Degree Days

(453883)

Base Temperature = 50 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201301
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
1957 0.00 z 0.00 z 10.00 u 170.00 c 465.50 638.50 716.50 677.50 553.00 91.93 b 2.00 1.00 3315.93
1958 2.00 20.00 7.50 78.00 535.00 709.50 917.00 926.00 467.50 197.00 28.00 2.50 3890.00
1959 0.00 1.50 21.50 136.00 231.50 572.50 825.50 672.00 388.50 136.50 18.50 0.50 3004.50
1960 0.00 0.00 75.00 135.50 287.00 592.50 972.50 694.50 496.50 216.50 15.50 0.00 3485.50
1961 8.00 11.41 a 34.50 134.50 331.00 742.00 907.00 912.00 369.50 131.50 0.00 0.00 3581.41
1962 0.00 0.00 6.72 a 203.28 a 240.00 533.50 780.50 711.00 505.00 140.50 18.50 0.00 3138.99
1963 0.00 0.00 21.00 81.00 339.00 550.00 697.50 785.00 625.50 265.50 7.50 0.00 3372.00
1964 0.00 0.00 14.00 94.50 287.00 515.50 789.00 636.00 412.50 125.50 4.00 0.00 2878.00
1965 0.00 1.50 13.00 191.50 321.50 517.50 779.00 758.00 380.50 252.50 22.50 0.00 3237.50
1966 0.00 0.00 55.00 158.00 409.00 507.50 715.50 767.00 585.50 178.00 3.00 1.50 3380.00
1967 6.50 5.50 16.00 40.00 330.50 603.50 858.50 924.00 667.00 211.50 19.50 2.50 3685.00
1968 8.50 20.00 42.00 92.00 356.50 568.50 868.50 697.50 497.00 99.00 1.50 0.00 3251.00
1969 0.00 0.00 32.50 100.50 401.50 652.00 724.00 669.50 477.00 87.00 8.00 0.00 3152.00
1970 0.00 0.00 7.50 43.00 320.50 617.50 818.00 745.50 340.50 124.50 6.00 0.00 3023.00
1971 5.00 5.50 8.00 82.00 341.00 407.00 766.00 899.00 328.50 166.00 1.00 0.00 3009.00
1972 6.00 15.50 65.00 40.50 350.50 521.00 728.00 0.00 z 389.00 144.50 1.50 8.00 2269.50
1973 0.00 2.50 7.50 112.50 348.00 525.00 764.00 730.50 439.50 135.50 7.50 0.50 3073.00
1974 6.00 1.50 24.50 83.50 243.50 570.00 686.00 723.50 500.00 121.00 13.00 2.50 2975.00
1975 0.00 2.50 3.50 33.50 269.50 440.00 817.50 633.00 448.00 162.50 38.79 a 19.00 2867.79
1976 3.00 0.00 8.50 58.00 314.50 405.50 697.50 619.50 517.00 151.00 15.50 0.00 2790.00
1977 0.00 2.50 6.50 226.50 199.50 602.00 676.50 810.00 341.50 85.50 6.50 8.00 2965.00
1978 0.00 0.00 65.10 a 73.00 223.50 513.00 683.00 667.02 a 379.00 117.00 8.50 0.00 2729.12
1979 0.00 d 0.00 18.50 90.00 0.00 z 522.50 0.00 z 732.50 499.50 232.50 0.00 a 1.55 a 2097.05
1980 0.00 z 0.00 z 0.00 165.00 297.00 402.50 720.50 628.00 478.00 142.08 a 37.00 18.00 2888.08
1981 0.00 8.50 22.00 119.00 297.00 404.00 671.00 791.50 451.55 a 92.47 b 17.50 3.50 2878.02
1982 0.00 19.00 10.50 49.00 277.00 544.50 708.50 732.00 429.50 121.50 6.50 4.50 2902.50
1983 3.50 8.50 33.00 108.50 378.64 c 485.50 631.00 764.50 342.50 97.00 43.50 0.00 2896.14
1984 3.50 1.50 17.00 65.50 0.00 z 429.50 729.00 732.50 360.00 143.00 1.00 0.00 2482.50
1985 0.00 1.00 8.50 170.00 375.00 547.50 885.00 0.00 z 307.00 131.00 0.00 z 0.00 a 2425.00
1986 0.00 19.00 41.50 80.00 317.50 643.50 609.67 a 428.50 o 95.50 q 158.50 20.50 0.00 1890.17
1987 0.00 0.00 40.50 222.00 435.50 585.50 713.00 709.00 563.00 148.50 31.50 8.50 3457.00
1988 0.50 1.50 15.00 144.00 311.50 503.00 730.50 700.00 423.00 293.50 48.50 0.00 3171.00
1989 2.50 0.00 17.50 156.00 297.50 587.00 716.00 668.50 461.00 155.00 49.00 0.00 3110.00
1990 8.50 5.00 19.50 j 204.50 286.50 516.50 810.50 762.00 607.50 113.00 46.50 0.00 3360.50
1991 0.00 5.50 6.00 104.50 254.00 402.50 759.00 815.50 0.00 z 198.50 7.50 0.00 2553.00
1992 6.50 1.50 0.00 z 198.50 429.00 681.50 725.50 752.00 382.00 171.00 6.50 0.00 3354.00
1993 0.00 0.00 1.50 k 103.00 451.00 0.00 z 580.00 647.50 473.50 215.00 8.50 3.00 2481.50
1994 0.50 3.00 57.00 204.00 0.00 z 514.00 849.50 827.00 554.50 139.00 3.00 8.00 3159.50
1995 0.50 24.50 26.50 86.50 340.00 460.00 735.00 614.50 514.50 124.50 39.50 3.50 2969.50
1996 4.50 5.00 9.00 130.50 227.00 478.50 777.00 684.00 399.00 168.50 1.50 0.00 2884.50
1997 0.00 2.00 32.00 95.50 373.00 478.50 702.00 778.00 468.50 138.50 4.00 4.00 3076.00
1998 0.00 0.00 38.50 102.50 325.00 528.50 894.00 767.00 604.50 117.00 33.00 1.00 3411.00
1999 1.00 6.50 18.00 72.00 225.00 479.00 640.00 711.50 406.50 109.50 41.50 7.50 2718.00
2000 0.00 0.00 2.50 169.50 326.50 465.00 a 727.00 733.00 402.50 110.00 0.00 0.00 2936.00
2001 0.00 0.00 19.50 106.50 360.00 437.50 744.00 b 780.17 a 519.00 110.50 38.79 a 0.00 c 3115.96
2002 5.00 3.50 7.50 106.50 242.00 552.50 792.50 660.50 436.00 132.00 17.50 12.00 2967.50
2003 3.00 0.00 81.50 124.00 303.00 586.00 845.00 784.00 517.00 278.50 10.50 0.00 3532.50
2004 1.50 0.00 68.50 170.00 355.50 552.00 821.00 785.50 438.00 198.00 9.00 7.50 3406.50
2005 3.00 0.00 52.00 0.00 z 403.50 489.50 781.00 770.50 419.50 195.00 5.50 0.00 3119.50
2006 5.50 i 0.00 23.00 110.00 342.50 547.50 861.00 711.00 473.00 142.00 45.50 1.00 3256.50
2007 2.50 4.00 51.00 102.50 364.00 526.00 863.50 691.50 432.00 126.00 18.50 11.50 3193.00
2008 0.00 1.50 2.00 48.50 337.50 460.00 784.00 694.00 413.50 131.50 25.50 0.00 2898.00
2009 5.50 0.00 6.00 119.50 324.00 559.00 799.00 775.00 495.00 91.50 15.50 0.00 3190.00
2010 0.00 0.00 20.50 87.50 235.00 455.50 714.50 695.50 447.50 159.50 30.50 0.00 2846.00
2011 13.00 0.00 b 13.00 19.82 b 220.88 c 430.34 a 606.50 765.50 516.96 b 187.07 b 14.50 1.00 2788.57
2012 1.00 4.30 b 24.50 145.50 284.17 a 426.21 a 762.50 738.00 0.00 z 160.50 0.00 z 0.00 z 2546.67
2013 0.00 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
Period of Record Statistics
MEAN 2.06 3.99 25.33 115.41 323.42 527.00 761.38 736.98 459.31 153.07 17.12 2.58 3117.94
S.D. 3.01 6.23 20.91 51.35 69.36 79.21 83.22 73.59 80.17 48.74 15.06 4.45 275.70
SKEW 1.55 1.90 1.04 0.36 0.55 0.46 0.19 0.74 0.40 1.03 0.75 2.13 0.80
MAX 13.00 24.50 81.50 226.50 535.00 742.00 972.50 926.00 667.00 293.50 49.00 19.00 3890.00
MIN 0.00 0.00 0.00 19.82 199.50 402.50 580.00 614.50 307.00 85.50 0.00 0.00 2718.00
NO YRS 54 54 52 55 53 55 55 53 53 56 54 55 41