MT RUSHMORE NATL MEM, SOUTH DAKOTA

Monthly Total Growing Degree Days

(395870)

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
1962 0.00 z 65.69 b 19.50 252.50 447.00 623.50 797.50 868.00 541.00 353.50 86.25 b 40.50 4094.94
1963 6.50 47.70 a 146.00 169.00 410.00 692.00 961.00 941.00 777.60 e 577.00 84.00 41.00 4852.80
1964 9.00 0.00 17.50 149.00 451.50 640.50 1038.50 831.00 554.00 375.00 117.50 18.00 4201.50
1965 16.00 42.00 7.00 166.00 358.50 586.50 873.00 803.50 247.50 428.00 115.00 60.50 3703.50
1966 8.00 7.50 125.00 70.50 506.00 707.50 1069.00 775.50 629.50 295.00 65.00 29.50 4288.00
1967 26.50 18.50 84.00 151.50 317.00 545.50 940.85 a 930.00 a 619.00 325.50 76.50 5.50 4040.35
1968 46.50 7.00 126.00 119.00 267.50 665.50 896.50 798.50 569.00 367.00 44.50 15.00 3922.00
1969 0.00 a 5.00 28.50 275.00 538.00 523.00 909.00 1043.00 758.50 127.50 112.00 37.50 4357.00
1970 12.50 27.00 10.33 a 93.50 495.50 815.00 1013.00 1008.50 584.00 223.00 39.50 5.00 4326.83
1971 3.50 11.00 30.00 151.00 336.00 739.00 864.50 1014.00 395.00 f 216.47 b 17.07 a 7.00 3389.53
1972 6.50 35.50 116.00 118.50 411.00 704.50 790.00 870.50 555.50 262.50 35.00 24.50 3930.00
1973 53.50 30.00 19.08 e 119.00 382.00 705.00 914.50 972.00 494.00 358.00 62.50 19.50 4129.08
1974 45.00 21.00 82.50 194.00 389.00 784.00 1085.50 818.40 a 522.00 398.50 61.00 19.00 4419.90
1975 1.50 0.00 20.00 99.00 0.00 z 627.50 1045.50 909.00 574.00 399.50 165.00 36.50 3877.50
1976 24.50 42.50 49.08 a 164.00 366.50 g 686.00 976.00 920.50 675.50 238.50 73.50 26.50 3876.58
1977 0.00 16.00 46.00 283.50 549.00 798.62 a 963.67 b 737.50 630.50 315.00 75.50 16.00 4431.29
1978 0.00 0.00 113.50 83.00 382.50 682.50 877.82 a 884.50 715.50 310.00 94.50 0.00 4143.82
1979 0.00 8.00 38.00 130.50 336.00 601.50 844.00 801.50 800.00 320.00 50.50 63.50 3993.50
1980 6.50 20.00 11.88 a 194.50 392.50 762.00 1030.00 796.04 c 610.50 327.00 107.59 a 95.58 a 4354.09
1981 49.50 34.50 33.50 293.50 313.50 659.00 912.50 879.50 675.50 266.50 181.03 a 26.00 4324.53
1982 3.50 62.00 42.00 138.50 325.00 505.00 952.50 905.00 549.50 200.00 31.50 13.00 3727.50
1983 16.50 43.00 63.50 81.50 297.50 626.50 1058.00 1107.50 616.00 271.50 100.50 0.00 4282.00
1984 34.00 26.50 24.00 93.50 354.00 619.50 914.00 1017.00 465.50 249.50 73.00 32.50 3903.00
1985 2.00 6.00 55.00 303.50 640.00 648.00 1023.50 857.15 a 490.50 221.00 32.50 4.00 4283.15
1986 70.50 45.00 174.00 129.00 399.00 798.00 915.00 865.00 362.50 260.00 48.00 4.50 4070.50
1987 35.00 40.00 73.00 359.50 523.00 764.50 984.00 773.00 584.50 256.50 91.50 40.50 4525.00
1988 25.50 40.00 67.50 l 240.50 518.50 984.50 1017.50 974.00 575.00 286.50 63.50 50.00 4775.50
1989 25.50 0.00 106.50 195.50 427.00 672.50 1030.50 904.50 574.00 295.50 50.50 17.50 4299.50
1990 15.50 i 7.00 51.50 173.00 295.50 726.00 863.50 921.00 747.00 249.00 150.00 50.00 4233.50
1991 4.00 50.00 61.50 158.50 422.00 743.00 899.50 975.50 587.00 316.00 31.50 16.50 4265.00
1992 36.50 58.00 76.50 217.00 480.00 558.00 610.00 676.00 587.00 310.50 17.07 a 0.00 3626.57
1993 7.50 9.50 72.50 76.50 376.00 506.00 669.50 730.00 352.50 225.50 13.00 15.00 3053.50
1994 15.00 10.50 82.50 196.50 520.50 720.00 815.00 862.50 648.00 202.00 42.50 62.00 4177.00
1995 30.50 61.00 112.50 35.00 181.50 567.00 850.50 978.00 528.50 191.00 71.50 19.00 3626.00
1996 27.50 48.00 35.00 137.50 224.00 713.00 836.50 884.69 e 453.00 257.50 16.50 17.50 3650.69
1997 40.50 8.50 112.00 77.00 235.71 b 673.50 811.00 774.50 618.50 322.00 43.00 30.00 3746.21
1998 15.00 10.50 51.00 143.00 405.50 439.00 895.50 860.50 750.50 216.00 83.79 a 42.00 3912.29
1999 6.00 24.00 59.00 71.50 313.50 581.50 901.00 895.50 436.50 325.50 269.00 37.00 3920.00
2000 7.00 64.50 67.50 136.50 429.50 606.00 925.50 987.50 666.00 294.00 5.00 1.50 4190.50
2001 20.00 0.00 13.00 180.00 388.50 631.50 959.50 1001.50 611.00 216.50 224.48 a 7.50 4253.48
2002 21.00 20.00 3.50 135.50 260.50 767.00 1055.00 813.00 561.00 0.00 z 68.50 25.00 3730.00
2003 26.00 9.00 75.50 181.50 344.50 526.50 1033.00 987.50 509.50 403.50 30.00 18.60 a 4145.10
2004 9.00 25.50 103.00 191.00 359.00 521.00 856.00 736.50 543.50 236.50 73.00 8.00 3662.00
2005 47.00 36.50 39.00 172.50 303.00 677.50 968.50 819.00 678.00 318.50 107.00 19.00 4185.50
2006 27.26 b 11.00 44.50 248.00 452.00 757.50 1050.50 840.50 431.50 200.00 109.50 21.50 4193.76
2007 14.50 4.50 154.50 140.50 475.00 760.50 1034.50 912.50 617.50 275.00 121.50 6.00 4516.50
2008 15.50 0.00 23.00 0.00 z 0.00 z 550.34 a 875.50 827.50 490.50 218.50 90.50 1.00 3092.34
2009 31.00 31.50 105.00 113.50 373.00 524.50 763.00 766.50 632.00 55.00 132.93 a 0.00 c 3527.93
2010 24.00 0.00 83.00 119.50 250.50 590.00 861.50 943.50 600.50 385.00 94.00 8.50 3960.00
2011 0.50 17.63 a 27.50 72.50 208.50 635.00 990.00 915.00 605.00 308.00 53.00 6.50 3839.13
2012 22.50 0.00 278.00 234.00 388.50 808.50 1066.50 919.00 713.50 217.00 121.50 31.50 4800.50
2013 19.50 0.50 45.00 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 65.00
Period of Record Statistics
MEAN 19.91 23.25 67.40 160.57 384.44 661.76 927.22 883.01 582.37 285.33 80.85 23.38 4087.45
S.D. 16.49 20.05 51.38 69.52 98.11 103.46 103.01 91.89 109.74 84.06 52.26 19.91 346.54
SKEW 0.87 0.57 1.59 0.71 0.17 0.33 -0.71 0.06 -0.51 0.49 1.35 1.26 -0.38
MAX 70.50 65.69 278.00 359.50 640.00 984.50 1085.50 1107.50 800.00 577.00 269.00 95.58 4852.80
MIN 0.00 0.00 3.50 35.00 181.50 439.00 610.00 676.00 247.50 55.00 5.00 0.00 3053.50
NO YRS 50 52 51 50 48 51 51 51 50 50 51 51 43