DIABLO DAM, WASHINGTON

Monthly Total Growing Degree Days

(452157)

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
1931 5.50 5.00 85.00 299.00 497.50 597.00 780.00 779.50 501.00 288.00 53.00 0.00 z 3890.50
1932 0.00 e 7.50 55.00 246.50 416.50 0.00 z 416.00 m 705.00 0.00 z 0.00 z 0.00 z 0.00 z 1430.50
1933 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
1934 1.00 40.00 181.50 0.00 z 496.00 616.00 680.00 810.50 474.50 307.50 71.50 5.00 3683.50
1935 2.50 17.00 11.00 174.50 459.50 580.00 747.50 717.50 613.50 263.00 8.00 0.50 3594.50
1936 0.00 0.00 3.00 256.50 492.00 536.00 732.50 712.50 555.00 399.00 52.50 1.00 3740.00
1937 0.00 0.50 61.00 98.50 438.50 603.50 766.00 719.00 596.00 385.00 56.00 3.00 3727.00
1938 0.50 7.00 29.00 176.50 442.00 613.00 846.50 734.50 738.50 307.50 15.50 14.00 3924.50
1939 0.00 0.00 84.00 277.00 494.00 540.50 812.50 898.00 622.00 276.00 97.00 50.00 4151.00
1940 11.50 4.50 127.50 280.00 516.00 641.00 762.00 790.00 717.50 359.50 11.00 15.00 4235.50
1941 2.00 36.50 210.00 362.50 411.50 549.00 934.50 788.50 416.50 284.00 97.00 18.00 4110.00
1942 7.00 5.00 52.00 308.50 392.50 487.50 850.00 880.50 665.50 362.50 17.00 7.50 4035.50
1943 0.50 m 0.00 z 20.00 s 245.17 a 313.50 527.07 a 718.50 692.00 658.97 a 392.67 a 66.00 f 5.68 a 3553.56
1944 1.00 5.00 29.50 246.50 428.00 597.93 a 782.00 722.50 589.14 a 412.00 85.00 12.50 3911.07
1945 14.50 17.00 30.00 115.50 488.00 539.50 782.00 806.50 498.10 a 319.50 26.90 a 3.00 3640.50
1946 0.00 5.00 53.00 167.00 494.50 495.00 727.00 771.00 557.00 187.00 5.50 2.00 3464.00
1947 1.50 17.00 127.50 273.00 518.50 522.50 691.50 708.72 b 559.00 0.00 z 26.00 2.00 3447.22
1948 0.00 1.50 32.50 135.00 362.00 647.00 672.00 681.50 523.50 257.50 9.50 0.00 3322.00
1949 0.00 0.50 43.00 234.00 494.00 524.50 664.00 718.50 597.00 175.67 a 142.24 a 6.50 3599.91
1950 0.00 0.00 5.00 115.34 a 308.50 601.50 849.00 807.07 b 617.50 196.00 52.00 48.00 3599.91
1951 0.00 4.50 37.00 296.00 434.52 a 669.50 813.50 778.50 659.00 253.00 40.50 1.00 3987.02
1952 0.00 1.50 39.50 252.00 505.00 519.00 802.50 792.50 667.50 483.00 68.50 3.50 4134.50
1953 44.50 28.50 75.00 227.50 478.50 509.50 825.50 733.00 600.50 361.00 102.00 2.00 g 3985.50
1954 0.00 z 8.00 26.50 94.00 424.00 464.00 653.50 635.00 545.00 252.00 167.50 6.00 3275.50
1955 0.00 0.00 16.00 99.50 254.72 a 559.50 622.00 762.50 565.50 270.00 44.50 0.50 3194.72
1956 0.00 0.00 18.00 268.50 548.50 485.50 798.50 795.00 578.50 201.00 44.50 13.50 3751.50
1957 0.00 6.00 48.00 256.50 608.50 622.50 666.50 685.00 731.50 304.00 52.50 14.00 3995.00
1958 2.00 64.00 101.50 243.50 674.00 728.50 1021.50 900.00 537.00 355.00 61.00 20.50 4708.50
1959 5.50 4.00 40.50 207.50 393.50 601.00 824.00 690.50 481.00 321.50 68.00 3.50 3640.50
1960 3.00 7.00 95.50 204.00 379.50 574.50 882.50 692.50 572.50 357.50 38.00 2.50 3809.00
1961 25.50 23.00 4.50 s 197.40 e 443.50 694.50 825.50 935.00 499.50 209.00 27.00 0.50 3880.40
1962 11.50 41.00 55.50 283.89 c 330.50 575.00 731.00 691.00 594.50 329.00 112.00 19.00 3773.89
1963 6.00 68.00 63.50 210.50 472.00 556.50 668.50 817.00 682.00 335.50 44.50 9.00 3933.00
1964 4.50 2.50 34.50 116.00 335.50 529.50 715.00 652.00 501.00 329.00 33.50 1.50 3254.50
1965 0.50 8.50 101.00 240.50 382.00 595.50 0.00 z 797.50 537.00 369.00 135.50 20.50 3187.50
1966 1.00 0.00 z 87.50 238.50 470.00 553.50 706.50 779.00 639.00 266.50 73.50 21.00 3836.00
1967 2.50 8.00 24.00 157.50 414.50 688.50 755.50 931.60 b 709.00 287.00 102.00 6.50 4086.60
1968 3.50 46.50 94.50 156.00 449.00 545.50 798.50 718.50 574.50 213.00 56.50 0.00 3656.00
1969 0.00 1.00 79.50 191.50 538.50 745.00 716.00 692.50 541.00 285.50 102.50 3.00 3896.00
1970 0.00 55.50 84.50 106.00 431.50 722.50 793.50 787.50 451.00 254.50 80.50 0.00 3767.00
1971 4.50 9.00 15.50 151.50 452.00 448.00 760.50 868.50 458.50 251.50 28.50 0.00 3448.00
1972 0.00 4.50 65.50 104.50 451.50 526.00 717.00 810.00 434.00 286.00 46.00 12.50 3457.50
1973 0.50 24.00 78.00 209.50 464.50 561.00 767.00 710.50 605.00 237.50 11.00 13.00 3681.50
1974 20.50 3.50 52.00 192.50 292.00 619.00 699.50 832.00 697.50 350.00 59.50 20.50 3838.50
1975 3.00 0.00 e 6.00 83.50 337.00 451.50 665.00 f 630.73 e 666.00 263.00 48.50 15.00 2504.23
1976 3.50 2.50 19.50 201.50 418.00 490.00 670.50 653.00 636.50 333.00 116.00 27.00 3571.00
1977 6.50 55.50 29.50 301.00 369.50 636.00 665.97 b 912.50 514.50 263.00 7.00 m 5.50 3759.47
1978 0.50 15.50 133.50 220.71 b 393.50 691.50 805.50 757.00 469.50 348.50 28.00 1.00 3864.71
1979 0.00 1.50 112.00 197.00 476.50 597.50 797.00 806.00 636.00 386.50 39.50 22.00 4071.50
1980 0.00 18.50 40.00 330.52 a 460.50 532.00 758.50 699.00 545.00 347.00 78.50 46.50 3856.02
1981 32.00 29.50 154.50 181.50 443.50 470.50 722.00 904.50 570.00 258.00 101.50 1.50 3869.00
1982 0.00 3.00 49.50 125.50 383.00 650.00 676.00 720.50 580.00 270.00 14.50 7.50 3479.50
1983 6.00 41.00 137.00 260.00 544.00 554.00 648.00 769.00 474.00 257.50 69.50 0.00 3760.00
1984 23.00 8.00 132.00 174.50 285.00 511.00 750.50 769.00 461.00 209.00 8.50 0.00 z 3331.50
1985 0.00 z 0.00 0.00 z 181.00 430.00 574.50 910.50 736.00 460.50 198.50 17.50 0.00 3508.50
1986 15.00 8.00 128.00 163.00 416.50 686.00 654.50 925.50 526.50 372.50 45.00 0.00 3940.50
1987 4.00 23.00 113.50 323.00 499.00 667.00 0.00 z 799.00 672.00 410.50 138.00 9.50 3658.50
1988 0.00 43.50 74.50 262.00 432.50 585.50 746.50 774.50 574.00 412.50 56.00 12.50 3974.00
1989 6.00 2.00 36.50 293.50 399.00 678.50 717.50 725.00 666.50 295.50 68.00 30.50 3918.50
1990 4.00 7.50 99.50 304.00 412.00 564.00 882.50 854.50 693.50 182.50 75.00 0.00 4079.00
1991 0.00 35.00 44.50 216.50 389.00 510.00 767.00 812.00 655.00 339.50 69.00 9.00 3846.50
1992 10.00 64.50 292.00 317.50 574.50 728.50 779.00 836.50 458.50 323.50 59.00 1.03 a 4444.53
1993 0.00 2.50 90.50 186.00 603.50 551.00 620.00 759.50 632.00 384.50 23.50 9.00 3862.00
1994 36.00 0.00 131.50 320.00 527.00 550.00 843.50 796.50 663.00 276.50 0.00 3.00 4147.00
1995 4.50 30.00 96.00 236.00 572.00 626.50 823.00 629.00 726.00 226.00 82.00 9.50 4060.50
1996 11.50 15.00 71.50 233.00 294.00 571.00 852.00 804.00 493.50 242.50 42.00 0.00 3630.00
1997 6.00 8.50 0.00 z 167.50 468.00 524.00 705.00 845.00 0.00 z 247.00 95.00 3.50 3069.50
1998 0.50 19.00 106.00 270.00 489.50 651.00 890.00 857.00 715.00 314.50 55.50 3.50 4371.50
1999 4.50 2.00 45.50 180.50 310.00 477.50 706.50 775.50 561.00 275.00 87.50 1.50 3427.00
2000 0.00 3.00 57.00 275.50 372.00 594.50 716.50 731.50 530.00 291.00 30.00 0.50 3601.50
2001 5.00 6.50 84.50 184.50 429.87 a 527.00 745.50 791.00 597.00 223.50 80.50 0.00 3674.87
2002 5.50 0.00 19.00 169.50 338.50 626.00 777.50 787.50 569.50 297.00 95.50 12.00 3697.50
2003 13.50 16.00 61.50 205.50 416.00 688.00 861.00 856.50 653.50 382.50 9.50 2.50 4166.00
2004 1.00 23.00 121.00 351.50 482.50 684.00 880.50 866.00 507.00 324.50 64.00 16.00 4321.00
2005 32.50 29.50 124.50 288.00 576.00 538.00 773.50 848.50 535.50 319.50 26.00 16.50 4108.00
2006 3.50 0.50 64.50 240.00 451.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 760.00
Period of Record Statistics
MEAN 5.83 15.09 73.63 218.37 441.12 582.17 764.39 775.16 580.61 300.11 58.42 9.31 3841.56
S.D. 9.32 17.84 51.21 67.86 81.61 72.61 79.48 75.14 82.09 65.37 36.68 11.18 297.22
SKEW 2.35 1.41 1.43 -0.08 0.12 0.33 0.53 0.18 0.05 0.21 0.64 1.93 0.26
MAX 44.50 68.00 292.00 362.50 674.00 745.00 1021.50 935.00 738.50 483.00 167.50 50.00 4708.50
MIN 0.00 0.00 3.00 83.50 254.72 448.00 620.00 629.00 416.50 175.67 0.00 0.00 3194.72
NO YRS 72 73 71 74 75 73 70 74 72 72 71 70 58