COULEE DAM 1 SW, WASHINGTON

Monthly Total Growing Degree Days

(451767)

Base Temperature = 40 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1934 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 879.50 h 678.50 440.20 a 151.07 b 3.50 o 1269.77
1935 10.33 d 18.00 48.00 l 0.00 z 0.00 z 565.00 j 1091.64 c 1058.00 882.93 a 406.50 11.38 a 0.00 a 3478.79
1936 4.00 5.91 b 76.43 b 472.50 b 798.77 a 842.68 b 1117.50 663.00 l 760.56 c 533.00 11.00 30.00 4652.34
1937 0.00 a 0.00 159.00 330.50 678.00 813.00 1159.92 a 963.77 c 817.76 a 509.36 b 97.20 e 4.50 m 5528.51
1938 0.00 a 0.52 a 114.70 a 420.00 a 676.32 a 949.50 1235.19 b 1015.54 d 945.52 a 481.53 a 57.41 a 2.87 d 5899.10
1939 10.50 0.00 188.58 a 446.79 b 725.50 763.45 a 1135.12 a 1158.37 a 835.18 b 415.40 a 54.31 a 61.00 5794.19
1940 0.00 7.50 238.18 a 415.50 753.50 938.50 1099.50 1078.28 a 876.50 511.00 31.50 10.50 5960.47
1941 0.00 a 8.00 285.50 497.00 639.00 798.00 1138.50 993.00 614.00 389.05 a 106.03 a 40.50 5508.58
1942 1.50 1.50 103.00 402.00 511.50 657.00 887.63 a 1062.78 a 793.97 a 408.00 17.59 a 0.00 4846.47
1943 0.00 0.00 z 75.00 368.50 432.50 645.50 1014.00 923.50 784.50 370.50 29.50 14.50 4658.00
1944 1.50 2.00 78.50 354.50 648.00 832.00 1077.00 969.00 756.00 486.50 58.50 8.50 5272.00
1945 10.00 17.00 104.50 237.00 623.50 768.50 1076.00 1046.50 614.50 431.42 a 40.00 17.57 a 4986.48
1946 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 z 0.00
1947 5.50 27.50 158.00 329.50 730.50 711.00 972.00 895.50 673.50 325.00 21.00 0.00 4849.00
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 76.50 303.00 544.50 749.50 1121.50 989.00 734.50 313.50 53.00 0.00 4894.00
2007 0.00 9.00 147.00 260.00 573.50 0.00 z 1156.50 988.50 685.00 262.50 46.00 15.50 4143.50
2008 0.00 2.00 22.00 152.50 613.00 705.50 1042.50 992.50 690.00 324.50 50.50 0.00 4595.00
2009 1.50 0.00 37.00 238.00 566.00 824.50 1091.50 1033.00 789.50 225.50 33.50 0.00 4840.00
2010 4.00 7.50 111.00 288.00 413.50 665.00 999.00 939.00 656.50 381.50 66.50 0.00 4531.50
2011 16.00 4.50 73.00 142.50 429.50 665.00 868.50 1023.50 801.72 a 306.00 16.50 4.00 4350.72
2012 1.00 2.00 75.00 307.50 523.00 661.50 1053.50 1063.00 763.45 a 339.45 a 91.50 14.50 4895.40
2013 0.00 0.00 106.00 14.50 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 106.00
Period of Record Statistics
MEAN 3.72 12.04 95.52 301.25 569.56 764.96 1022.26 989.08 712.80 348.12 51.01 7.14 4834.64
S.D. 5.61 15.60 55.43 83.56 94.22 93.40 95.51 87.23 102.13 78.67 33.22 10.65 388.93
SKEW 1.47 1.71 0.96 0.09 0.15 0.27 0.03 -0.17 0.11 0.59 0.84 2.68 0.85
MAX 21.50 71.00 285.50 497.00 798.77 968.00 1270.50 1158.37 973.50 533.00 151.07 61.00 5960.47
MIN 0.00 0.00 8.00 123.00 398.00 574.50 773.50 817.50 472.00 225.50 3.00 0.00 4142.00
NO YRS 75 75 75 74 74 72 75 74 78 78 77 74 61