COULEE DAM 1 SW, WASHINGTON

Monthly Total Growing Degree Days

(451767)

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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 847.50 844.00 829.77 a 625.00 268.00 21.00 2.50 3437.77
1949 0.00 1.50 57.00 362.07 a 686.00 734.50 956.50 943.50 732.93 a 240.00 132.00 7.50 4853.50
1950 0.00 1.50 32.00 142.50 f 465.50 685.50 1009.50 0.00 z 973.50 232.00 19.00 4.50 3423.00
1951 2.00 10.50 27.50 301.50 553.00 731.00 972.50 941.37 a 685.00 279.00 19.00 4.50 4526.87
1952 0.00 0.00 58.50 347.00 599.50 753.50 1018.00 989.93 a 792.50 487.00 24.00 0.00 5069.93
1953 21.50 9.00 88.00 238.50 482.00 574.50 955.00 922.00 713.50 412.50 74.00 4.00 4494.50
1954 4.50 26.00 24.00 189.00 572.00 620.50 899.50 817.50 626.50 244.00 129.00 2.00 4154.50
1955 0.00 0.00 10.50 123.00 398.00 774.50 889.50 947.00 680.00 298.50 21.00 0.00 4142.00
1956 1.00 0.00 39.00 360.50 641.50 650.50 1057.50 949.00 693.00 283.50 11.00 8.78 a 4695.28
1957 0.00 8.50 44.50 323.00 665.00 759.00 914.00 846.00 786.50 257.50 23.00 3.10 a 4630.10
1958 4.00 71.00 76.50 239.50 781.50 892.00 1114.50 1116.50 631.50 359.50 53.50 4.00 5344.00
1959 10.50 0.00 53.50 306.50 408.50 708.50 1008.00 833.50 561.50 252.00 39.50 6.50 4188.50
1960 0.00 0.50 119.50 252.00 425.00 744.00 1134.00 861.00 691.00 373.50 24.00 0.00 4624.50
1961 10.50 25.00 111.00 254.00 527.00 888.00 1081.00 1123.00 601.50 276.00 7.50 0.50 4905.00
1962 0.00 8.50 52.50 362.00 437.50 719.50 985.00 876.50 723.00 317.50 81.50 5.00 4568.50
1963 0.50 22.50 101.00 241.00 560.00 759.50 917.00 997.00 841.00 427.50 60.50 0.00 4927.50
1964 0.00 0.50 47.50 227.50 521.00 738.00 977.00 840.50 594.50 339.00 30.50 0.00 4316.00
1965 0.00 0.00 56.00 331.50 499.00 761.50 1011.00 976.00 575.00 426.00 103.00 3.50 4742.50
1966 0.00 2.00 104.50 315.50 605.00 668.00 924.50 970.00 782.50 323.00 63.00 16.50 4774.50
1967 10.50 29.00 55.50 158.00 500.50 828.50 1036.00 1146.50 862.50 346.00 45.50 2.50 5021.00
1968 7.00 40.50 146.00 244.00 595.50 791.00 1109.50 868.00 706.50 254.00 24.00 8.00 4794.00
1969 0.00 0.00 88.00 308.50 670.50 926.50 976.00 964.50 696.50 251.10 a 63.50 3.00 4948.10
1970 0.00 1.00 67.00 167.00 564.00 917.50 1068.00 1010.50 508.50 277.00 31.50 0.00 4612.00
1971 13.50 13.00 19.50 254.50 612.50 633.50 1020.00 1155.50 551.00 305.00 30.00 0.00 4608.00
1972 3.50 29.00 119.00 180.00 606.00 750.50 933.50 1040.00 544.00 324.00 31.50 15.00 4576.00
1973 0.00 8.50 105.00 328.00 603.50 759.50 1046.00 994.50 680.00 305.00 31.00 10.50 4871.50
1974 16.50 6.50 93.50 308.00 435.50 858.50 943.50 1006.00 772.00 383.00 40.50 2.77 c 4866.27
1975 0.00 0.00 8.00 190.50 513.50 700.00 1119.50 852.50 712.00 305.00 79.00 15.50 4495.50
1976 0.00 5.00 50.00 248.00 526.00 648.00 932.50 819.50 777.00 305.50 50.50 0.00 4362.00
1977 0.00 23.00 57.00 419.50 464.50 865.86 a 954.00 1099.50 574.50 292.00 41.50 2.50 4793.86
1978 0.00 0.00 162.00 293.00 519.52 b 833.28 a 1006.98 a 921.50 599.46 b 342.00 30.50 0.00 h 4708.24
1979 0.00 12.50 129.00 263.00 619.00 857.00 1094.00 1044.50 801.00 453.38 c 16.50 7.75 a 5297.62
1980 0.00 0.52 a 50.50 399.50 577.78 b 675.00 1001.00 886.50 687.50 379.75 a 91.50 32.60 b 4782.15
1981 14.50 49.00 161.00 277.24 a 526.00 637.50 930.00 1105.50 680.50 285.00 66.00 7.00 4739.24
1982 0.00 49.00 72.50 172.00 544.50 874.50 949.00 990.00 688.50 318.00 12.50 4.50 4675.00
1983 6.50 44.00 150.50 255.00 625.50 530.00 i 839.00 1023.00 623.50 333.50 99.50 0.00 4000.00
1984 0.00 0.00 136.00 230.50 420.50 681.00 1009.50 1013.00 600.50 260.50 34.00 0.00 4385.50
1985 0.00 0.50 24.00 341.50 664.00 825.00 1270.50 958.50 540.50 294.50 46.50 0.00 4965.50
1986 0.00 15.50 156.50 258.50 614.00 954.00 911.50 1142.00 472.00 381.00 58.00 0.00 4963.00
1987 0.00 6.50 136.50 429.50 681.00 880.50 0.00 z 0.00 z 852.41 a 432.50 98.00 33.00 3549.91
1988 0.00 28.50 113.00 402.50 563.50 764.50 1038.50 1035.50 725.69 a 512.50 72.50 2.50 5259.19
1989 11.00 0.00 78.00 380.50 533.00 855.50 1020.50 924.00 748.50 344.50 93.00 0.00 4988.50
1990 16.50 11.00 143.00 415.50 512.50 720.50 1107.50 1040.50 871.00 279.00 111.00 1.00 5229.00
1991 0.00 38.50 57.00 304.00 524.50 644.50 1025.00 1061.00 824.00 373.00 25.00 5.50 4882.00
1992 20.00 37.50 240.50 372.50 701.00 968.00 974.00 1026.50 656.00 394.50 22.50 0.00 5413.00
1993 0.00 0.00 56.50 228.50 0.00 z 726.00 773.50 895.50 719.00 444.00 25.00 9.50 3877.50
1994 0.00 9.00 186.00 420.50 630.00 741.50 1151.50 1039.00 826.00 344.00 3.00 10.50 5361.00
1995 0.00 59.00 102.50 293.50 654.00 748.00 1023.50 857.50 780.00 287.50 71.00 7.50 4884.00
1996 2.00 7.77 a 72.00 307.50 427.00 729.50 1089.00 1020.00 605.00 293.50 23.00 0.00 4576.27
1997 1.00 0.00 89.00 223.50 607.00 695.50 954.50 1059.50 718.50 303.00 46.50 1.50 4699.50
1998 0.00 z 18.00 133.00 318.00 621.00 0.00 z 1172.50 1101.00 861.50 341.00 89.50 14.50 4670.00
1999 10.00 13.50 103.85 a 233.00 458.50 702.50 927.00 1062.78 a 675.50 321.00 98.50 14.50 4620.63
2000 0.00 3.22 b 52.50 380.00 514.50 0.00 z 956.35 a 975.50 642.93 a 304.83 a 11.90 a 0.00 b 3841.73
2001 0.00 0.00 77.50 242.00 604.00 604.66 a 966.50 1006.47 a 730.00 248.52 a 80.00 0.00 4559.64
2002 12.00 22.50 40.00 252.50 447.00 779.00 1054.00 898.00 658.00 250.50 72.00 18.00 4503.50
2003 6.00 9.50 116.00 293.00 548.50 879.00 1152.50 1021.00 811.50 512.50 30.00 0.00 z 5379.50
2004 0.00 z 0.00 z 0.00 z 417.12 d 566.00 847.00 1128.00 1084.50 656.00 384.50 51.50 6.50 5141.12
2005 2.50 9.00 185.00 343.00 644.50 774.00 0.00 z 1069.00 695.00 431.00 0.00 z 0.00 4153.00
2006 6.00 3.00 79.05 a 302.00 544.50 747.22 c 688.00 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1681.77
Period of Record Statistics
MEAN 3.81 13.86 87.97 291.74 558.10 764.89 1005.93 982.12 697.32 332.64 50.59 5.52 4759.36
S.D. 5.89 17.02 49.39 74.64 84.17 92.91 91.93 93.10 102.09 70.37 32.47 7.27 310.28
SKEW 1.46 1.45 0.68 0.01 0.08 0.21 0.25 -0.09 0.19 0.80 0.69 2.10 0.17
MAX 21.50 71.00 240.50 429.50 781.50 968.00 1270.50 1155.50 973.50 512.50 132.00 33.00 5413.00
MIN 0.00 0.00 8.00 123.00 398.00 574.50 773.50 817.50 472.00 232.00 3.00 0.00 4142.00
NO YRS 56 57 57 57 57 56 56 56 58 58 57 56 47