ICE HARBOR DAM, WA

Monthly Sum of Growing Degree Days (Degrees Fahrenheit)

(453883)

Base Temperature = 40 F

File last updated on Aug 27, 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-----z77.50u446.28c775.50 938.50 1026.50 987.50 850.00 350.17b60.50 106.00 5540.95c
195868.50 172.00 140.00 363.50 845.00 1009.50 1227.00 1236.00 766.00 451.00 183.00 33.50a6495.00
195942.50 38.50 221.50 408.00 537.00 872.50 1135.50 982.00 687.50 420.00 115.50 23.00 5483.50
19602.00 60.00 252.00 416.50 591.00 892.50 1282.50 1004.50 796.50 500.50 155.50 3.50 5957.00
196156.00 162.00b249.00 380.62b641.00 1042.00 1217.00 1222.00 647.00a378.50 21.00 43.50 6059.62
196244.00a50.50 129.00a482.00a548.00 833.50 1090.50 1021.00 805.00 430.00a170.00a40.50 5644.00
196325.50 49.00 212.00 340.00 649.00 850.00 1007.50 1095.00 925.50 555.00 206.50 7.50 5922.50
196441.50 44.69c141.00 343.00 596.00 815.50 1099.00 946.00 712.50 407.00 80.50 41.00 5267.69
196537.50 88.00 135.00 486.00 606.00a817.50 1048.50a1068.00 677.50 562.00 198.00 46.00 5770.00
196635.50 39.00 232.00 429.00 719.00 807.50 1025.50 1077.00 885.50 474.50 168.50a90.50 5983.50
1967125.50 128.50 191.00 290.50 637.50 903.50 1168.50 1234.00 967.00 512.50 122.00 67.50a6348.00
196863.50a155.00 289.50 323.00a666.50 868.50 1178.50 1007.50 797.00 394.00 97.00a26.00 5866.00
19692.00 2.00 182.50 385.00 709.50 952.00 1034.00 979.50 777.00 352.50 145.00 30.50 5551.50
197012.50 64.50 183.00 279.00 630.50 917.50 1128.00 1055.50 640.50 369.50 123.50 40.00 5444.00
1971104.50 90.00 116.00 343.00 649.50 707.00 1076.00 1209.00 628.50 406.00 130.50 49.66b5509.66
197279.50a88.50a266.00 260.50 659.00 821.00 1038.00 -----z660.50a416.00 87.00 88.00 4464.00a
197313.50 43.00 239.00 381.50 658.00 825.00 1074.00 1040.50 739.50 442.50 103.00 76.00 5635.50
197492.50 107.50 202.76b368.50 550.50 870.00 996.00 1033.50 800.00 402.50a168.50 76.50 5668.76
197530.50 29.00 133.00 241.50 579.50 740.00 1101.72b914.50a729.66b451.50 139.00a62.50 5152.38
197642.00a74.00a158.00 310.00a624.50 705.50 1007.50 895.34b817.00 410.00 125.00 22.00 5190.84
19775.00 105.00 161.00 514.00 508.50 869.00a986.50 1120.00 641.50 365.00 119.50 88.50 5483.50
19783.00 41.54b221.25c325.73b533.50 813.00 993.00 933.62b654.00a382.50 48.00 23.50 4972.64
19790.00d58.50 186.00 348.50a-----z822.50 -----z1042.50 799.50 539.50 42.98b63.00a3902.98b
1980-----z-----z148.50 435.50 607.00 677.00a995.00a938.00 746.50a379.50a158.50 98.50 5184.00b
198139.50 88.00a237.00 376.50 576.50a676.50a981.00 1101.50 718.79b350.69b158.00 43.00 5346.98
198223.08e85.15b143.04c254.00a575.17b844.50 1018.50 1010.00a729.50 387.00 83.24c42.93b5196.11
198391.50a132.00 276.21b369.50 666.43c751.50a909.50a1074.50 627.12b397.50 227.00 15.00b5537.76
198460.50 62.50 241.55b349.00 -----z705.00a1039.00 1042.50 642.50a323.00a88.50 8.00 4562.05a
19850.00 35.31b142.00a434.00a665.50a819.50a1195.00 -----z599.50 394.00 -----z0.00a4284.81b
198613.00a78.00 292.00 332.00a627.00 929.00 911.00 588.50o225.50q459.50 177.00a5.50 3824.00b
198716.50a51.00a238.00a514.50 753.50 885.50 993.50a1023.50 863.00 436.50 192.00 80.00 6047.50
198815.50 101.50 209.00 425.50 604.00a803.00 1040.50 1010.00 698.07b579.00 216.50 22.50 5725.07
198975.00a6.50 184.14b433.45b589.00a850.00a992.50a935.00a600.00f428.50 200.50 30.00 4724.58a
199080.89c64.38b131.00l473.67c595.50 777.82b1120.50 1072.00 907.50 397.00 215.50a22.00 5726.77a
199133.10b133.00 131.00 384.00 564.00 702.50 1069.00 1125.50 -----z445.00a114.00a85.00 4786.10a
199264.50 115.00 -----z464.00a700.86b981.50 991.50a1028.50a689.00 458.00 123.50a27.50a5643.86a
19933.75c2.50a93.50n395.50 761.00 -----z866.50a957.50 773.50 478.00a67.50 55.00 4360.75b
199467.50 56.00 247.00a477.00a-----z814.00 1159.50 1100.17b830.50a432.50 90.50 80.00 5354.67a
199516.67d147.50a189.00a367.50 631.50a760.00 1045.00 924.50 814.50 361.03b229.50 48.00a5534.70
199641.50 61.00 178.00 417.50 535.00 778.50 1087.00 958.50a697.00 417.00a107.00a18.50 5296.50
199745.50 74.00 231.00 336.50 683.00 751.41b985.50a1088.00 745.50a421.00 131.00 47.50 5539.91
199859.00 90.50a238.00a376.00 635.00 828.50 1204.00 1077.00 904.50 380.00a219.57b74.50 6086.57
1999107.50 105.00 192.00 310.50 501.50a779.00 913.00a1006.00 706.50 368.50a222.00a95.00a5306.50
200033.50 37.00a187.50a453.00a636.50 729.66b990.50a1010.69b677.50a384.50 54.00 0.00 5194.35
20015.00a21.50 225.00 343.50 640.50a744.00 1025.69b1055.00a782.00a387.93b164.16b56.11d5450.39
200261.11d60.50a138.00a365.61b513.21c812.50a1098.50 963.00 731.50 363.50 156.50 79.00 5342.93
200362.07b72.50a311.00a396.00 617.50 883.50 1114.50a1089.00 827.00 545.50a89.00 9.00a6016.57
200423.50a24.37b300.00d459.00 657.00 852.00 1138.50 1068.50a711.50a474.31b98.50a58.00 5865.18
200532.00 21.94d297.00 -----z690.00b789.50 1091.00 1044.83b719.50 479.44d100.00 8.89d5274.10a
200673.00j57.00 175.00a392.00 645.50 849.00 1127.00a1027.00 765.50 428.50 189.00a34.00a5689.50a
200734.50 56.50 259.00 373.50 674.00 794.91b1133.00a986.00 732.00 394.00 139.50 44.50a5621.41
200810.00 78.00 146.50 255.50 619.29c727.00a1043.50a970.50a713.50 375.50 174.00 23.00 5136.29
200954.00 13.50a130.00 347.48b633.50 829.61b1058.04c1085.00 795.00 332.00 134.50 3.50 5416.12
201054.31b75.50 229.00 335.00 537.50 735.00a995.89c969.50a747.50 433.00a187.50 34.50a5334.20
201182.00 40.50b180.50 237.18b513.75c706.00a916.50 1075.50 789.73b458.79b104.50 29.00 5133.95
201243.00 45.11b206.00 413.00 573.50a702.00a1072.50 1048.00 -----z429.00 -----z16.00m4532.11c
201322.50 -----z203.00 -----z-----z-----z-----z1092.00 840.00 -----z146.00 25.50 2329.00f
201446.00 -----z244.00 -----z633.10b814.50 1164.00 1097.50 745.50a581.00a179.00 67.50 5572.10b
201523.50 118.00 336.00 -----z-----z985.00a1152.00 -----z-----z-----z-----z-----z2614.50g
Period of Record Statistics
MEAN42.29 70.94 205.92 377.50 625.39 820.39 1062.80 1039.26 753.26 426.89 138.35 44.20 5588.37
S.D.30.22 40.76 54.36 68.37 70.65 84.94 87.32 77.40 82.88 61.98 52.09 28.71 354.10
SKEW0.62 0.56 0.29 -0.07 0.56 0.44 0.15 0.61 0.41 0.84 -0.10 0.35 0.56
MAX125.50 172.00 336.00 514.50 845.00 1042.00 1282.50 1236.00 967.00 581.00 229.50 106.00 6495.00
MIN0.00 2.00 116.00 237.18 501.50 676.50 866.50 895.34 599.50 323.00 21.00 0.00 4972.64
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