CHIEF JOSEPH DAM, WASHINGTON

Monthly Total Growing Degree Days

(451400)

Base Temperature = 50 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
1949 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 51.00 5.00 0.00 56.00
1950 0.00 b 0.00 0.00 35.50 278.00 345.50 k 491.50 k 543.00 i 347.50 i 50.93 c 0.00 g 0.00 k 364.43
1951 0.00 i 0.00 0.00 73.00 292.00 464.00 731.00 674.00 399.50 120.00 0.00 0.00 2753.50
1952 0.00 0.00 2.50 113.00 282.50 425.50 668.50 641.50 449.00 166.50 0.00 b 0.00 2749.00
1953 0.00 a 0.00 b 6.09 c 75.00 192.00 f 363.89 c 673.50 639.50 428.79 a 112.12 a 7.50 0.00 2306.39
1954 0.00 a 0.00 a 0.00 b 31.61 b 318.86 c 369.50 578.84 b 0.00 z 339.50 43.00 0.00 0.00 1681.31
1955 0.00 0.00 0.00 22.00 107.98 a 480.00 a 618.50 623.74 b 397.00 67.00 0.00 0.00 a 2316.22
1956 0.00 0.00 0.00 140.50 355.50 0.00 z 752.00 600.50 350.50 59.50 0.00 a 0.00 2258.50
1957 0.00 0.00 3.50 81.00 392.50 498.50 627.00 571.50 532.00 71.00 0.00 0.00 2777.00
1958 0.00 0.00 0.00 34.00 534.50 667.50 810.50 806.00 364.50 125.00 0.00 0.00 3342.00
1959 0.00 0.00 0.00 66.00 212.00 471.00 723.00 635.50 309.00 41.00 0.00 0.00 2457.50
1960 0.00 0.00 35.00 65.00 220.50 520.50 885.00 623.00 425.50 134.50 0.00 0.00 2909.00
1961 0.00 0.00 7.00 87.00 270.00 605.00 776.00 818.50 334.50 81.00 0.00 0.00 2979.00
1962 0.00 0.00 1.50 127.00 215.00 478.00 669.50 624.00 462.50 80.00 0.50 0.00 2658.00
1963 0.00 0.00 9.00 47.00 305.50 489.50 648.50 683.50 560.50 194.00 0.00 0.00 2937.50
1964 0.00 0.00 0.00 z 53.00 248.50 463.00 681.50 563.50 312.00 75.00 1.50 0.00 2398.00
1965 0.00 0.00 1.00 108.50 265.50 491.50 726.00 698.50 313.00 110.00 0.50 0.00 2714.50
1966 0.00 0.00 21.50 99.50 298.50 395.00 631.00 685.50 517.00 84.00 0.00 0.00 2732.00
1967 0.00 0.00 0.00 16.50 279.00 520.50 719.00 805.50 610.50 98.50 4.00 0.00 3053.50
1968 0.00 0.00 0.50 56.50 267.50 462.93 a 712.50 532.00 394.50 23.50 0.00 0.00 2449.93
1969 0.00 0.00 0.50 71.00 374.00 603.50 653.00 642.50 394.50 44.00 0.00 0.00 2783.00
1970 0.00 0.00 2.50 23.00 307.00 596.50 763.00 738.00 271.00 78.50 0.00 0.00 2779.50
1971 0.00 0.00 2.00 62.00 316.50 383.00 664.00 775.00 257.00 95.00 0.00 0.00 2554.50
1972 0.00 0.00 7.00 19.00 276.50 414.50 0.00 z 702.00 291.50 66.00 0.00 0.00 1776.50
1973 0.00 0.00 3.50 123.00 339.50 0.00 z 783.50 763.00 415.00 48.00 0.00 0.00 z 2475.50
1974 0.00 0.00 5.00 81.50 184.50 386.50 g 625.00 721.78 a 434.00 52.00 0.00 0.00 2103.78
1975 0.00 0.00 0.00 29.00 222.50 426.50 845.00 601.00 430.50 82.50 22.00 2.50 2661.50
1976 0.00 0.00 a 4.00 44.00 232.50 386.00 670.00 576.00 489.00 111.50 0.00 0.00 2513.00
1977 0.00 0.00 z 7.50 182.00 202.50 639.50 716.00 870.50 304.50 50.00 3.50 0.00 2976.00
1978 0.00 0.00 30.50 71.50 236.50 569.50 770.00 681.50 326.00 85.00 0.00 e 0.00 d 2770.50
1979 0.00 0.00 3.50 86.00 355.50 591.72 a 803.00 762.50 478.50 182.00 0.00 0.00 3262.72
1980 0.00 0.00 0.50 140.50 327.50 380.50 667.50 586.00 390.50 122.50 2.22 c 0.00 2617.72
1981 0.00 0.00 19.00 103.00 279.50 349.00 651.00 823.00 410.50 47.00 0.00 0.00 2682.00
1982 0.00 0.00 0.00 42.50 253.00 608.00 632.00 687.50 383.00 64.00 0.00 0.00 2670.00
1983 0.00 0.00 2.50 83.50 350.00 475.00 548.00 743.00 293.50 15.50 2.50 0.00 2513.50
1984 0.00 0.00 6.50 44.00 180.00 418.00 687.50 715.50 278.00 98.00 0.00 0.00 2427.50
1985 0.00 0.00 0.00 146.00 397.00 552.50 923.50 672.00 281.00 82.50 0.00 0.00 3054.50
1986 0.00 0.00 15.50 65.50 329.50 659.00 652.00 875.50 310.00 103.00 2.00 0.00 3012.00
1987 0.00 0.00 7.00 206.00 402.50 617.00 703.50 727.50 559.00 122.50 7.50 0.00 3352.50
1988 0.00 0.00 3.50 167.00 303.50 503.50 773.50 712.50 459.50 214.00 8.00 0.00 3145.00
1989 0.00 0.00 1.00 139.50 308.00 636.00 737.00 653.00 437.50 115.50 17.50 0.00 3045.00
1990 0.00 0.00 30.50 181.00 260.50 456.00 826.00 781.50 588.00 70.00 38.00 0.00 3231.50
1991 0.00 0.00 0.00 z 105.00 287.00 417.00 797.00 817.50 554.50 130.50 0.00 0.00 3108.50
1992 0.00 0.00 38.00 144.50 434.50 709.00 725.00 728.00 401.50 120.00 0.00 0.00 3300.50
1993 0.00 0.00 1.00 37.50 446.50 458.50 540.00 630.50 387.50 129.50 0.00 0.00 2631.00
1994 0.00 0.00 16.50 84.00 303.00 450.50 833.50 705.00 481.00 60.50 0.00 0.00 2934.00
1995 0.00 0.00 5.00 93.50 411.00 520.00 776.00 575.50 515.00 82.50 2.50 0.00 2981.00
1996 0.00 0.00 0.00 86.50 195.00 455.50 817.50 760.00 380.00 121.00 0.00 0.00 2815.50
1997 0.00 0.00 8.50 62.50 335.50 524.00 829.50 891.50 550.00 121.42 a 8.00 0.00 3330.92
1998 0.00 0.00 16.00 115.50 357.00 543.00 885.50 812.00 596.50 70.00 6.00 0.00 3401.50
1999 0.00 0.00 9.50 74.00 205.00 451.00 659.50 781.00 377.50 72.00 2.00 0.00 2631.50
2000 0.00 0.00 3.00 130.00 263.00 531.00 708.00 689.00 355.00 59.50 0.00 0.00 a 2738.50
2001 0.00 0.00 4.50 92.00 365.00 435.50 722.50 783.50 496.00 57.00 0.00 0.00 2956.00
2002 0.00 0.00 5.00 81.50 261.00 533.50 804.00 690.50 408.50 72.00 0.00 0.00 2856.00
2003 0.00 0.00 27.00 72.00 264.00 581.50 847.00 769.50 490.00 195.00 0.00 0.00 3246.00
2004 0.00 0.00 27.00 143.50 308.50 582.00 823.00 822.00 381.00 135.00 0.00 0.00 3222.00
2005 0.00 0.00 12.00 125.00 354.00 463.00 752.50 752.50 399.00 113.00 0.00 0.00 2971.00
2006 0.00 0.00 5.50 88.50 320.50 541.00 849.50 710.50 436.50 103.50 1.50 0.00 3057.00
2007 0.00 0.00 29.50 80.00 344.50 471.50 869.00 694.00 403.50 57.00 1.50 0.00 2950.50
2008 0.00 z 0.50 0.00 34.00 364.00 440.50 759.00 681.50 382.00 83.50 6.00 0.00 2751.00
2009 0.00 0.00 0.00 55.50 320.00 575.50 826.00 761.50 477.50 36.50 0.00 0.00 3052.50
2010 0.00 0.00 7.00 97.50 168.50 354.50 724.00 656.50 377.00 114.50 0.50 0.00 2500.00
2011 0.00 0.00 3.50 5.50 128.00 322.00 475.50 798.50 507.93 a 91.00 0.00 0.00 2331.93
2012 0.00 0.00 0.50 94.50 219.50 362.00 756.00 824.17 b 453.00 119.00 7.76 a 0.00 a 2836.43
2013 0.00 0.00 9.00 8.00 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 9.00
Period of Record Statistics
MEAN 0.00 0.01 7.54 84.84 294.15 494.12 729.60 711.01 416.00 91.88 2.51 0.04 2860.68
S.D. 0.00 0.06 9.89 44.32 77.83 90.30 91.86 84.90 87.88 41.53 6.09 0.32 285.91
SKEW 0.00 7.75 1.63 0.53 0.23 0.26 -0.26 0.02 0.28 0.81 4.01 7.68 0.09
MAX 0.00 0.50 38.00 206.00 534.50 709.00 923.50 891.50 610.50 214.00 38.00 2.50 3401.50
MIN 0.00 0.00 0.00 5.50 107.98 322.00 475.50 532.00 257.00 15.50 0.00 0.00 2316.22
NO YRS 62 63 62 63 62 59 61 61 62 64 63 62 51