ICE HARBOR DAM, WASHINGTON

Monthly Total Growing Degree Days

(453883)

Base Temperature = 40 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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 77.50 u 461.67 c 775.50 938.50 1026.50 987.50 850.00 361.84 b 60.50 106.00 5568.01
1958 68.50 172.00 140.00 363.50 845.00 1009.50 1227.00 1236.00 766.00 451.00 183.00 33.50 6495.00
1959 42.50 38.50 221.50 408.00 537.00 872.50 1135.50 982.00 687.50 420.00 115.50 23.00 5483.50
1960 2.00 60.00 252.00 416.50 591.00 892.50 1282.50 1004.50 796.50 500.50 155.50 3.50 5957.00
1961 56.00 165.93 a 249.00 400.50 641.00 1042.00 1217.00 1222.00 669.50 378.50 21.00 43.50 6105.93
1962 44.00 50.50 133.30 a 498.62 a 548.00 833.50 1090.50 1021.00 805.00 445.00 182.50 40.50 5692.42
1963 25.50 49.00 212.00 340.00 649.00 850.00 1007.50 1095.00 925.50 555.00 206.50 7.50 5922.50
1964 41.50 53.00 141.00 343.00 596.00 815.50 1099.00 946.00 712.50 407.00 80.50 41.00 5276.00
1965 37.50 88.00 135.00 486.00 625.00 817.50 1089.00 1068.00 677.50 562.00 198.00 46.00 5829.50
1966 35.50 39.00 232.00 429.00 719.00 807.50 1025.50 1077.00 885.50 474.50 177.50 90.50 5992.50
1967 125.50 128.50 191.00 290.50 637.50 903.50 1168.50 1234.00 967.00 512.50 122.00 73.00 6353.50
1968 63.50 155.00 289.50 338.50 666.50 868.50 1178.50 1007.50 797.00 394.00 98.00 26.00 5882.50
1969 2.00 2.00 182.50 385.00 709.50 952.00 1034.00 979.50 777.00 352.50 145.00 30.50 5551.50
1970 12.50 64.50 183.00 279.00 630.50 917.50 1128.00 1055.50 640.50 369.50 123.50 40.00 5444.00
1971 104.50 90.00 116.00 343.00 649.50 707.00 1076.00 1209.00 628.50 406.00 130.50 53.50 5513.50
1972 89.00 94.50 266.00 260.50 659.00 821.00 1038.00 0.00 z 685.00 416.00 87.00 88.00 4504.00
1973 13.50 43.00 239.00 381.50 658.00 825.00 1074.00 1040.50 739.50 442.50 103.00 76.00 5635.50
1974 92.50 107.50 213.00 368.50 550.50 870.00 996.00 1033.50 800.00 419.50 168.50 76.50 5696.00
1975 30.50 29.00 133.00 241.50 579.50 740.00 1127.50 943.00 748.00 451.50 143.79 a 62.50 5229.79
1976 47.50 83.00 158.00 316.50 624.50 705.50 1007.50 929.50 817.00 410.00 125.00 22.00 5246.00
1977 5.00 105.00 161.00 514.00 508.50 902.00 986.50 1120.00 641.50 365.00 119.50 88.50 5516.50
1978 3.00 40.00 249.55 a 351.00 533.50 813.00 993.00 977.02 a 678.50 382.50 48.00 23.50 5092.57
1979 0.00 d 58.50 186.00 359.50 0.00 z 822.50 0.00 z 1042.50 799.50 539.50 51.72 a 65.10 a 3924.82
1980 0.00 z 0.00 z 148.50 435.50 607.00 702.50 1030.50 938.00 778.00 392.15 a 158.50 98.50 5289.15
1981 39.50 88.00 237.00 376.50 604.00 704.00 981.00 1101.50 751.55 a 362.38 b 158.00 43.00 5446.43
1982 26.00 111.00 150.50 272.50 585.50 844.50 1018.50 1042.00 729.50 387.00 78.00 54.50 5299.50
1983 98.50 132.00 295.50 369.50 688.64 c 785.50 941.00 1074.50 634.00 397.50 227.00 14.50 5658.14
1984 60.50 56.00 255.50 349.00 0.00 z 729.50 1039.00 1042.50 655.00 347.00 88.50 8.00 4630.50
1985 0.00 34.50 148.00 451.50 684.00 847.50 1195.00 0.00 z 599.50 394.00 0.00 z 0.00 a 4354.00
1986 16.00 78.00 292.00 350.50 627.00 943.50 919.67 a 588.50 o 225.50 q 459.50 177.00 5.50 3868.67
1987 22.00 51.00 249.00 514.50 745.50 885.50 1023.00 1019.00 863.00 436.50 192.00 80.00 6081.00
1988 15.50 101.50 209.00 430.00 619.50 803.00 1040.50 1010.00 723.00 579.00 208.00 22.50 5761.50
1989 75.00 6.50 195.50 443.00 607.50 887.00 1026.00 978.50 761.00 428.50 200.50 30.00 5639.00
1990 79.00 69.00 131.00 j 498.00 595.50 816.50 1120.50 1072.00 907.50 397.00 220.50 22.00 5797.50
1991 32.00 130.50 131.00 384.00 564.00 702.50 1069.00 1125.50 0.00 z 455.00 114.00 85.00 4792.50
1992 64.50 115.00 0.00 z 486.00 737.50 981.50 1035.50 1062.00 682.00 438.00 137.50 27.50 5767.00
1993 3.50 2.50 78.00 k 395.50 761.00 0.00 z 890.00 957.50 773.50 504.50 67.50 55.00 4410.50
1994 67.50 56.00 259.00 501.50 0.00 z 814.00 1159.50 1137.00 854.50 432.50 90.50 80.00 5452.00
1995 16.00 149.50 203.00 367.50 650.00 760.00 1045.00 924.50 814.50 381.00 213.50 51.00 5575.50
1996 41.50 61.00 178.00 417.50 535.00 778.50 1087.00 994.00 697.00 421.50 107.50 18.50 5337.00
1997 45.50 74.00 231.00 336.50 683.00 778.50 1012.00 1088.00 768.50 421.00 131.00 47.50 5616.50
1998 59.00 90.50 239.50 376.00 635.00 828.50 1204.00 1077.00 904.50 388.00 229.50 74.50 6106.00
1999 107.50 105.00 192.00 310.50 524.00 779.00 950.00 1021.50 706.50 385.00 219.50 107.50 5408.00
2000 33.50 37.00 194.50 456.50 636.50 765.00 a 1037.00 1043.00 698.50 384.50 54.00 0.00 5340.00
2001 5.00 21.50 224.00 343.50 670.00 737.50 1054.00 b 1090.17 a 819.00 404.00 176.38 a 55.91 c 5600.96
2002 52.50 60.50 138.00 385.50 535.50 852.50 1102.50 970.50 736.00 369.50 160.50 74.50 5438.00
2003 75.50 73.50 324.50 408.00 612.00 886.00 1155.00 1094.00 817.00 571.50 92.50 9.00 6118.50
2004 27.50 31.00 323.00 459.00 665.50 852.00 1131.00 1095.50 738.00 494.50 99.00 54.00 5970.00
2005 29.00 23.50 297.00 0.00 z 713.50 789.50 1091.00 1080.50 719.50 498.50 100.00 15.50 5357.50
2006 78.00 i 57.00 184.00 392.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 633.00
Period of Record Statistics
MEAN 43.28 73.58 208.31 389.51 635.22 832.93 1070.10 1048.90 757.99 431.55 136.39 46.82 5675.33
S.D. 32.24 42.19 55.76 68.16 72.37 80.76 83.21 77.87 85.11 60.52 54.38 30.14 332.77
SKEW 0.60 0.50 0.25 0.01 0.52 0.38 0.33 0.66 0.37 0.91 -0.02 0.25 0.51
MAX 125.50 172.00 324.50 514.50 845.00 1042.00 1282.50 1236.00 967.00 579.00 229.50 107.50 6495.00
MIN 0.00 2.00 116.00 241.50 508.50 702.50 890.00 924.50 599.50 347.00 21.00 0.00 5092.57
NO YRS 47 48 46 49 46 48 48 46 47 49 48 49 36