ICE HARBOR DAM, WA

Monthly Sum of Growing Degree Days (Degrees Fahrenheit)

(453883)

Base Temperature = 50 F

File last updated on Sep 03, 2015
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.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
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)JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANN
1957-----z-----z10.00u164.33c465.50 638.50 716.50 677.50 553.00 88.97b2.00 1.00 3307.30c
19582.00 20.00 7.50 78.00 535.00 709.50 917.00 926.00 467.50 197.00 28.00 2.50a3890.00
19590.00 1.50 21.50 136.00 231.50 572.50 825.50 672.00 388.50 136.50 18.50 0.50 3004.50
19600.00 0.00 75.00 135.50 287.00 592.50 972.50 694.50 496.50 216.50 15.50 0.00 3485.50
19618.00 11.42b34.50 123.25b331.00 742.00 907.00 912.00 357.00a131.50 0.00 0.00 3557.67
19620.00a0.00 6.50a196.50a240.00 533.50 780.50 711.00 505.00 135.50a16.00a0.00 3124.50
19630.00 0.00 21.00 81.00 339.00 550.00 697.50 785.00 625.50 265.50 7.50 0.00 3372.00
19640.00 0.00c14.00 94.50 287.00 515.50 789.00 636.00 412.50 125.50 4.00 0.00 2878.00
19650.00 1.50 13.00 191.50 312.50a517.50 748.50a758.00 380.50 252.50 22.50 0.00 3198.00
19660.00 0.00 55.00 158.00 409.00 507.50 715.50 767.00 585.50 178.00 3.00a1.50 3380.00
19676.50 5.50 16.00 40.00 330.50 603.50 858.50 924.00 667.00 211.50 19.50 2.50a3685.00
19688.50a20.00 42.00 86.50a356.50 568.50 868.50 697.50 497.00 99.00 1.50a0.00 3245.50
19690.00 0.00 32.50 100.50 401.50 652.00 724.00 669.50 477.00 87.00 8.00 0.00 3152.00
19700.00 0.00 7.50 43.00 320.50 617.50 818.00 745.50 340.50 124.50 6.00 0.00 3023.00
19715.00 5.50 8.00 82.00 341.00 407.00 766.00 899.00 328.50 166.00 1.00 0.00b3009.00
19726.00a15.50a65.00 40.50 350.50 521.00 728.00 -----z374.50a144.50 1.50 8.00 2255.00a
19730.00 2.50 7.50 112.50 348.00 525.00 764.00 730.50 439.50 135.50 7.50 0.50 3073.00
19746.00 1.50 24.31b83.50 243.50 570.00 686.00 723.50 500.00 114.00a13.00 2.50 2967.81
19750.00 2.50 3.50 33.50 269.50 440.00 801.72b614.50a439.66b162.50 37.50a19.00 2823.88
19763.00a0.00a8.50 58.00a314.50 405.50 697.50 595.34b517.00 151.00 15.50 0.00 2765.84
19770.00 2.50 6.50 226.50 199.50 579.00a676.50 810.00 341.50 85.50 6.50 8.00 2942.00
19780.00 0.00b51.43c58.52b223.50 513.00 683.00 633.62b364.50a117.00 8.50 0.00 2653.07
19790.00d0.00 18.50 89.00a-----z522.50 -----z732.50 499.50 232.50 0.00b1.50a2096.00b
1980-----z-----z0.00 165.00 297.00 387.00a695.00a628.00 456.50a137.50a37.00 18.00 2821.00b
19810.00 8.50a22.00 119.00 279.50a386.50a671.00 791.50 428.79b89.48b17.50 3.50 2817.27
19820.00e18.69b11.25c40.50a276.72b544.50 708.50 710.00a429.50 121.50 6.98c3.62b2871.77
19833.50a8.50 25.34b108.50 366.43c461.50a609.50a764.50 345.93b97.00 43.50 0.00b2834.20
19843.50 1.50 15.52b65.50 -----z415.00a729.00 732.50 357.50a129.00a1.00 0.00 2450.02a
19850.00 1.04b8.50a162.50a366.50a529.50a885.00 -----z307.00 131.00 -----z0.00a2391.04b
19860.00a19.00 41.50 71.50a317.50 629.00 601.00 428.50o95.50q158.50 20.50a0.00 1858.50b
19870.00a0.00a39.50a222.00 443.50 585.50 693.50a713.50 563.00 148.50 31.50 8.50 3449.00
19880.50 1.50 15.00 139.50 306.00a503.00 730.50 700.00 408.07b293.50 49.00 0.00 3146.57
19892.50a0.00 18.10b154.32b289.00a560.00a692.50a635.00a360.00f155.00 49.00 0.00 2555.42a
19909.11c5.19b19.50l190.65c286.50 487.82b810.50 762.00 607.50 113.00 42.50a0.00 3314.77a
19910.00b5.50 6.00 104.50 254.00 402.50 759.00 815.50 -----z197.00a7.50a0.00 2551.50a
19926.50 1.50 -----z186.50a402.41b681.50 691.50a728.50a389.00 177.00 2.50a0.00a3266.91a
19930.00c0.00a4.00n103.00 451.00 -----z566.50a647.50 473.50 198.50a8.50 3.00 2451.50b
19940.50 3.00 55.00a191.00a-----z514.00 849.50 800.17b540.50a139.00 3.00 8.00 3103.67a
19950.56d24.50a22.50a86.50 331.50a460.00 735.00 614.50 514.50 116.38b50.50 3.50a2959.93
19964.50 5.00 9.00 130.50 227.00 478.50 777.00 658.50a399.00 168.50a1.50a0.00 2859.00
19970.00 2.00 32.00 95.50 373.00 461.41b685.50a778.00 455.50a138.50 4.00 4.00 3029.41
19980.00 0.00a38.50a102.50 325.00 528.50 894.00 767.00 604.50 117.00a34.18b1.00 3412.18
19991.00 6.50 18.00 72.00 212.50a479.00 613.00a696.00 406.50 103.00a50.00a5.00a2662.50
20000.00 0.00a2.50a169.50a326.50 439.66b690.50a710.69b391.50a110.00 0.00 0.00 2840.85
20010.00a0.00 19.50 106.50 340.50a444.00 725.69b755.00a492.00a105.00b36.77b0.00d3024.96
20025.56d3.50a7.50a97.36b230.89c522.50a788.50 653.00 431.50 126.00 17.50 12.00 2895.81
20030.00b0.00a74.00a112.00 308.50 583.50 814.50a779.00 527.00 262.50a10.50 0.00a3471.50
20041.50a0.00b58.89d170.00 347.00 552.00 828.50 768.50a421.50a188.28b9.00a7.50 3352.66
20053.00 0.00d52.00 -----z390.00b489.50 781.00 744.83b419.50 186.67d5.50 0.00d3071.99a
20065.50j0.00 21.50a110.00 335.50 549.00 827.00a717.00 465.50 142.00 45.50a1.00a3214.00a
20072.50 4.00 51.00 102.50 364.00 504.91b833.00a676.00 432.00 126.00 18.50 11.00a3125.41
20080.00 1.50 0.00 48.50 321.43c437.00a743.50a670.50a413.50 131.50 28.50 0.00 2795.93
20095.50 0.00a6.00 103.57b324.00 539.61b758.04c775.00 495.00 91.50 15.50 0.00 3113.71
20100.00b0.00 19.50 93.00 235.00 445.00a695.89c669.50a447.50 143.50a29.50 0.00a2778.39
201113.00 0.00b13.00 19.16b213.75c416.00a606.50 765.50 499.73b181.03b14.50 1.00 2743.18
20121.00 4.15b24.50 145.50 275.00a412.00a762.50 738.00 -----z160.50 -----z0.00m2523.15c
20130.00 -----z38.00 -----z-----z-----z-----z782.00 540.00 -----z17.50 1.50 1379.00f
20142.50 -----z41.50 -----z333.10b514.50 854.00 787.50 455.50a282.00a37.00 6.00 3313.60b
20150.00 6.00 86.50 -----z-----z695.00a842.00 -----z-----z-----z-----z-----z1629.50g
Period of Record Statistics
MEAN1.99 4.02 26.05 112.75 320.12 523.55 755.95 731.80 456.97 153.04 17.66 2.55 3085.36
S.D.3.01 6.17 21.05 50.25 68.57 83.23 85.70 75.95 80.72 50.71 15.57 4.33 292.83
SKEW1.60 1.89 1.01 0.35 0.60 0.48 0.16 0.64 0.43 1.04 0.76 2.20 0.75
MAX13.00 24.50 86.50 226.50 535.00 742.00 972.50 926.00 667.00 293.50 50.50 19.00 3890.00
MIN0.00 0.00 0.00 19.16 199.50 386.50 566.50 595.34 307.00 85.50 0.00 0.00 2653.07
YRS56.00 55.00 55.00 55.00 54.00 57.00 57.00 55.00 54.00 57.00 56.00 57.00 40.00