FORT BENTON, MONTANA

Monthly Total Growing Degree Days

(243113)

Base Temperature = 40 F

File last updated on Jul 24, 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 0.00 z 840.50 878.16 b 569.00 224.50 37.50 8.00 2557.66
1949 3.00 0.00 17.50 347.50 558.00 692.50 920.00 981.00 537.00 180.00 163.00 2.50 4402.00
1950 0.00 22.00 28.00 119.00 391.50 616.50 837.50 791.00 497.00 321.50 50.50 42.50 3717.00
1951 0.00 1.50 19.50 157.00 495.50 488.00 881.50 764.50 420.50 202.00 24.00 2.50 3456.50
1952 2.50 16.50 28.50 352.50 512.50 741.00 869.50 850.00 626.00 253.50 39.50 4.00 4296.00
1953 38.50 7.50 70.50 161.50 373.00 628.00 936.50 910.00 638.50 350.00 100.00 12.50 4226.50
1954 14.50 101.50 13.50 136.00 494.50 563.50 955.50 836.50 501.50 214.50 168.50 57.50 4057.50
1955 1.50 8.50 37.50 121.00 372.50 642.50 862.00 913.50 482.50 310.50 35.00 1.00 3788.00
1956 0.50 3.50 80.50 157.00 527.00 795.50 956.00 824.50 581.50 299.50 99.50 98.00 4423.00
1957 0.00 11.00 40.00 199.50 580.50 737.50 1013.00 878.00 584.50 194.00 43.00 44.50 4325.50
1958 15.50 10.50 16.50 209.50 725.40 a 662.50 801.00 982.50 571.00 303.00 53.00 28.50 4378.90
1959 8.00 0.00 65.50 212.00 321.50 741.00 954.00 799.00 471.50 201.50 49.00 38.50 3861.50
1960 9.00 11.00 130.00 181.00 429.50 686.50 1064.00 818.00 561.50 346.00 34.00 18.48 e 4288.98
1961 46.00 48.74 a 70.50 105.00 485.00 896.50 977.00 1027.00 384.50 300.50 41.00 9.50 4391.24
1962 73.00 50.50 45.00 309.50 464.00 708.00 810.00 852.50 485.50 318.00 130.00 42.00 4288.00
1963 30.00 57.50 110.00 202.50 475.50 708.50 927.50 909.00 679.00 420.00 73.00 45.50 4638.00
1964 22.50 27.00 36.00 175.50 472.50 652.00 934.50 758.00 398.00 315.00 54.00 0.00 3845.00
1965 0.00 41.50 0.00 161.00 380.00 600.50 882.00 848.00 246.00 388.00 46.00 38.50 3631.50
1966 5.50 0.00 118.00 171.00 547.00 624.50 973.00 797.00 678.50 246.50 13.00 34.00 4208.00
1967 10.50 31.50 55.00 62.00 412.50 603.50 922.50 934.00 668.00 306.50 44.50 11.50 4062.00
1968 48.00 26.50 128.50 155.50 364.50 612.00 893.50 757.50 501.50 214.00 40.00 0.00 3741.50
1969 0.00 0.00 36.00 293.00 493.00 615.50 846.50 883.00 574.00 110.50 44.50 12.50 3908.50
1970 1.00 11.00 18.00 110.50 472.50 790.00 923.50 896.00 464.00 174.00 32.00 10.00 3902.50
1971 5.50 34.50 51.00 189.50 484.00 657.50 853.50 1037.00 425.50 247.50 58.50 1.00 4045.00
1972 7.00 17.50 169.50 198.50 484.50 790.00 774.00 920.00 418.50 206.00 25.50 34.50 4045.50
1973 63.50 19.00 38.50 123.50 489.50 691.00 912.00 912.50 529.00 288.50 34.50 22.00 4123.50
1974 15.50 15.50 65.50 266.38 a 327.50 789.00 963.00 699.50 461.00 310.00 67.00 23.50 4003.38
1975 7.00 0.50 15.00 73.50 406.50 608.00 956.00 738.00 486.00 225.00 142.00 38.50 3696.00
1976 45.98 a 36.00 79.00 257.50 569.00 612.93 a 911.50 870.50 598.45 a 260.50 85.00 46.00 4372.36
1977 0.00 50.50 69.50 314.00 487.00 793.50 876.50 700.00 497.00 261.00 44.00 8.00 4101.00
1978 0.00 0.00 96.50 209.00 430.50 700.50 846.50 793.50 559.50 289.00 95.50 0.00 4020.50
1979 0.00 0.00 a 69.00 142.76 a 422.00 709.00 886.00 879.00 638.00 316.41 b 21.50 47.00 4130.67
1980 4.00 15.00 23.25 a 375.00 605.00 685.00 904.50 700.00 572.50 299.00 114.50 97.00 4394.75
1981 8.50 85.00 48.00 286.00 495.50 591.00 864.00 929.00 563.50 233.50 117.50 15.50 4237.00
1982 0.50 33.50 28.50 157.00 388.50 700.00 845.00 860.50 491.50 212.50 3.00 5.50 3726.00
1983 21.50 47.50 65.00 172.50 464.00 682.00 838.00 1001.50 472.50 266.00 75.00 0.00 4105.50
1984 51.00 35.00 38.50 217.00 463.50 660.00 978.00 1014.50 413.50 244.50 49.50 20.48 c 4185.48
1985 0.50 16.00 47.50 330.52 a 634.50 707.50 1070.50 794.50 358.00 250.00 33.50 3.50 4246.52
1986 61.50 43.00 194.50 227.07 a 494.00 853.00 822.50 906.00 387.00 306.50 45.50 13.50 4354.07
1987 34.00 44.50 107.00 381.50 601.50 798.00 906.50 742.00 608.50 242.00 57.50 43.50 4566.50
1988 31.52 a 58.00 112.00 329.50 648.00 978.00 969.50 906.00 530.50 349.50 88.50 42.00 5043.02
1989 44.50 0.00 47.50 202.50 462.50 735.00 998.00 833.50 516.50 255.50 88.50 24.00 4208.00
1990 27.00 43.50 45.50 241.00 420.50 681.50 906.00 936.00 710.50 241.00 104.50 25.00 4382.00
1991 19.00 87.00 64.50 207.00 478.50 663.50 942.00 1032.50 610.00 300.50 42.00 11.50 4458.00
1992 59.50 52.50 94.50 323.50 571.50 792.00 744.00 788.00 523.50 299.50 27.00 1.00 4276.50
1993 7.00 0.50 99.50 207.00 594.00 638.00 688.00 734.50 456.50 260.00 25.50 17.50 3728.00
1994 2.50 0.00 125.00 262.00 73.00 z 725.50 952.00 933.50 676.00 214.50 2.50 20.00 3913.50
1995 9.50 84.00 83.00 127.50 433.50 668.50 847.00 853.00 556.00 215.00 57.50 6.50 3941.00
1996 27.38 a 45.50 40.00 254.48 a 341.55 c 735.50 919.00 920.00 527.50 281.50 15.50 1.00 4108.92
1997 34.50 30.07 a 117.00 189.50 546.50 761.50 916.00 925.00 699.00 306.00 72.00 25.00 4622.07
1998 7.50 15.50 66.00 317.00 620.00 647.00 706.00 k 1054.50 798.00 323.50 89.50 42.50 3981.00
1999 25.32 a 54.17 e 149.32 a 240.58 d 366.00 i 419.00 k 757.00 f 691.50 j 507.60 e 289.50 f 199.62 d 56.46 c 1233.06
2000 6.31 d 24.34 a 98.96 e 296.67 c 501.96 e 696.00 761.50 i 776.50 g 620.19 d 273.00 0.00 g 9.41 c 2526.85
2001 20.15 a 4.67 d 75.95 a 260.00 c 594.17 d 769.62 d 514.00 p 1063.41 c 520.50 h 218.50 i 32.50 p 22.50 2810.46
2002 49.50 42.00 9.00 167.00 434.00 704.50 1052.50 760.50 568.00 149.00 124.50 31.50 4092.00
2003 45.00 2.00 103.00 316.00 423.00 719.00 1080.50 1070.50 554.50 399.00 36.50 23.00 4772.00
2004 3.00 5.50 159.00 0.00 z 359.50 586.00 928.50 793.50 484.50 159.00 65.50 32.50 3576.50
2005 54.00 31.50 57.00 222.50 431.00 634.00 936.00 811.00 500.00 230.50 93.50 31.50 4032.50
2006 66.00 19.00 18.50 255.50 504.50 770.40 e 615.50 l 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1633.90
Period of Record Statistics
MEAN 20.60 27.25 67.85 218.24 481.42 697.18 908.67 871.47 534.03 266.22 64.58 24.21 4154.03
S.D. 21.35 25.00 43.86 77.97 86.64 84.78 77.71 98.02 98.89 62.14 42.40 21.54 307.99
SKEW 0.84 0.96 0.77 0.23 0.41 0.61 -0.13 0.22 -0.03 0.05 1.13 1.34 0.23
MAX 73.00 101.50 194.50 381.50 725.40 978.00 1080.50 1070.50 798.00 420.00 199.62 98.00 5043.02
MIN 0.00 0.00 0.00 62.00 321.50 488.00 688.00 699.50 246.00 110.50 2.50 0.00 3456.50
NO YRS 58 58 58 57 56 57 54 56 57 56 56 58 51