GANN VALLEY 4 NW, SOUTH DAKOTA

Monthly Total Growing Degree Days

(393217)

Base Temperature = 40 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200905
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
1897 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 844.20 e 340.00 33.00 0.00 1217.20
1898 0.00 0.00 25.00 235.00 496.00 853.00 989.00 998.00 681.00 146.00 h 34.00 o 0.00 4277.00
1899 5.00 8.00 0.00 z 0.00 z 438.50 h 876.00 1075.50 1070.50 630.00 348.00 91.00 2.00 4106.00
1900 0.00 z 0.00 z 0.00 z 0.00 z 738.00 596.00 j 1010.50 1149.87 d 416.00 i 472.23 a 5.69 a 0.00 3376.29
1901 0.00 3.11 a 0.00 z 0.00 z 402.00 o 865.50 1277.50 1076.00 627.60 e 396.11 d 27.50 f 0.00 a 4245.82
1902 0.00 4.31 b 84.00 229.50 684.87 d 713.00 1053.50 941.50 598.50 355.50 50.00 0.00 4714.68
1903 0.00 l 0.00 40.00 290.00 639.00 799.14 a 1045.73 a 970.09 b 387.00 n 401.00 69.00 0.00 4253.96
1904 0.00 a 0.00 18.60 a 164.50 551.50 782.50 946.00 959.00 738.00 387.00 97.00 0.00 4644.10
1905 0.00 8.50 129.50 222.50 426.50 751.00 917.50 1037.50 780.50 269.00 81.50 0.00 4624.00
1906 0.00 10.50 5.00 349.00 582.00 751.00 952.00 0.00 z 726.00 0.00 z 0.00 z 0.00 a 3375.50
1907 0.00 3.63 a 120.38 a 87.41 a 321.07 c 712.50 d 968.00 992.00 a 590.50 342.00 46.15 d 0.00 z 4183.65
1908 0.00 z 2.00 40.50 348.00 441.00 0.00 z 1142.00 913.90 e 898.97 a 302.50 82.50 0.00 b 4171.37
1909 0.00 a 0.00 b 10.33 a 105.00 535.50 879.50 1044.00 1152.00 682.50 324.00 113.00 0.00 4845.83
1910 0.00 0.00 a 280.50 404.50 444.00 871.50 1090.00 949.00 717.50 529.00 0.00 z 0.00 a 5286.00
1911 0.00 0.00 118.00 289.14 a 710.93 a 1054.50 1056.00 907.00 708.00 235.08 a 0.00 0.00 c 5078.65
1912 0.00 c 13.50 h 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
1913 5.00 j 0.00 z 0.00 z 0.00 z 194.00 s 744.11 b 1022.50 1096.50 669.50 224.50 106.00 0.00 e 3863.11
1914 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
1915 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
1916 0.00 z 0.00 z 0.00 z 241.07 b 518.00 688.00 1174.50 961.00 683.00 278.00 52.00 10.33 a 4605.90
1917 0.00 0.00 16.50 108.50 435.50 741.50 1098.00 911.50 639.50 170.50 132.50 0.00 4254.00
1918 0.00 3.00 155.00 160.56 c 620.50 882.32 b 949.50 1008.53 a 500.00 410.50 74.00 19.50 4783.41
1919 3.00 0.00 41.50 202.00 576.00 877.00 1114.50 982.18 a 720.50 199.50 2.50 0.00 4718.68
1920 0.00 0.00 59.50 k 72.00 614.00 845.50 1036.50 911.50 477.50 i 459.00 6.50 0.50 3945.50
1921 0.50 24.00 91.00 296.38 a 578.00 1057.50 1137.50 978.00 630.00 321.00 38.33 c 2.50 5154.71
1922 0.00 0.00 e 16.00 230.00 592.00 873.00 925.50 1081.00 812.07 a 363.50 39.50 0.00 4932.57
1923 0.00 0.00 0.00 z 213.33 c 577.00 844.00 1145.00 728.50 f 738.00 320.00 44.00 g 5.50 3842.83
1924 0.00 17.50 1.00 255.00 395.00 738.00 1013.50 995.50 671.00 604.00 60.50 1.50 4752.50
1925 0.00 0.00 140.00 506.00 582.00 898.00 1091.00 1211.50 915.00 a 113.00 26.50 h 3.10 a 5459.60
1926 0.00 3.11 a 81.50 312.32 b 810.00 883.50 1168.50 1165.50 702.00 409.50 26.00 0.00 5561.93
1927 8.00 6.50 72.00 278.00 518.50 870.50 1088.00 1027.50 823.00 472.00 21.21 a 0.00 5185.21
1928 0.50 8.50 119.50 178.97 a 726.50 739.00 1088.50 1110.50 674.48 a 402.00 40.71 b 5.50 5094.66
1929 0.00 0.00 a 80.50 289.00 544.50 847.00 1187.00 1163.50 587.00 410.50 1.00 1.00 5111.00
1930 0.00 65.50 41.50 379.50 494.45 a 709.50 f 1289.00 1148.50 762.00 348.50 96.50 0.52 a 4625.97
1931 20.00 20.00 35.65 a 345.00 565.00 1126.50 1252.00 1135.50 954.00 474.50 146.00 0.50 6074.65
1932 0.00 a 30.50 20.00 353.00 697.50 932.00 1198.50 1157.00 782.50 257.30 a 73.00 11.37 a 5512.67
1933 1.00 23.50 89.50 264.00 562.00 1236.50 1276.00 1032.00 939.83 a 384.50 53.00 6.00 5867.83
1934 4.50 18.15 a 81.50 315.00 985.00 1040.00 1270.50 1099.00 604.00 491.50 127.50 0.00 6036.65
1935 3.50 12.50 142.50 203.50 424.50 802.00 1345.00 1170.50 840.00 355.50 24.00 0.00 5323.50
1936 0.00 0.00 28.00 242.50 747.00 995.00 1469.00 1281.50 857.00 354.00 20.00 4.00 5998.00
1937 0.00 0.00 55.00 233.50 682.50 872.00 1230.50 1232.50 785.00 344.50 85.50 0.00 5521.00
1938 0.00 0.00 73.00 337.50 470.50 761.50 1146.50 1287.00 779.50 520.00 57.41 a 0.00 5432.91
1939 12.00 0.00 124.00 294.00 734.50 925.50 1201.00 1071.00 793.45 a 402.50 128.00 67.00 5752.95
1940 0.00 0.00 8.00 149.00 543.50 975.50 1279.35 e 1048.00 784.00 570.00 30.00 0.00 5387.35
1941 0.00 0.00 3.58 e 218.00 761.50 875.50 1161.98 a 1098.00 754.00 366.50 71.00 35.50 5345.56
1942 0.00 z 0.00 39.50 424.00 307.00 776.00 1000.00 998.00 552.50 381.50 60.50 0.00 4539.00
1943 0.00 10.50 100.50 368.00 486.50 816.00 1133.50 1083.50 643.50 389.50 18.00 0.00 5049.50
1944 7.50 0.00 3.50 125.00 722.00 769.00 949.00 935.00 632.50 354.50 70.50 0.00 4568.50
1945 0.00 4.50 182.00 175.50 388.00 590.00 977.00 970.00 604.00 333.50 24.50 0.00 4249.00
1946 0.00 5.00 188.50 399.00 438.50 838.00 1049.50 890.50 612.00 220.00 10.00 1.00 4652.00
1947 8.50 0.00 39.00 154.50 403.00 664.50 988.50 1202.50 712.50 594.00 15.50 0.00 4782.50
1948 0.00 0.00 16.00 373.50 589.00 819.00 1081.38 a 1007.00 807.50 417.50 60.00 10.00 5180.88
1949 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 300.00 n 312.50 108.00 0.00 420.50
1950 0.00 0.00 5.50 100.50 436.50 817.00 893.50 848.50 593.50 377.00 34.00 1.50 4107.50
1951 0.00 12.50 14.00 147.50 532.00 631.50 944.47 a 919.48 c 497.00 278.50 15.00 a 0.00 3991.95
1952 0.00 0.00 0.00 115.50 k 542.50 a 932.00 1086.00 1002.00 788.00 243.50 48.00 0.00 4642.00
1953 3.50 0.00 54.00 111.00 508.50 890.00 999.00 1049.00 715.00 497.00 103.00 1.50 4931.50
1954 0.00 47.00 6.20 a 315.50 456.50 781.00 1128.50 1000.00 677.50 227.50 121.50 0.00 4761.20
1955 0.00 0.00 40.00 436.00 710.00 764.00 1209.00 a 1164.50 711.50 353.00 19.00 0.00 b 5407.00
1956 0.00 0.00 32.50 105.00 566.50 1050.52 a 980.00 919.50 654.50 495.47 b 30.50 2.00 4836.48
1957 0.00 0.00 3.10 a 232.50 472.00 741.50 1132.57 b 1031.50 598.50 305.72 b 20.50 11.00 4548.89
1958 0.00 33.60 c 8.50 204.00 662.00 712.76 a 923.80 a 1088.50 802.76 a 379.50 72.50 3.00 4890.92
1959 0.00 0.00 68.50 250.50 546.50 986.00 1074.00 1130.00 612.50 177.50 16.00 0.00 4861.50
1960 0.00 0.00 0.00 221.00 494.40 b 732.00 1099.50 1033.00 703.50 371.00 36.50 0.00 4690.90
1961 0.00 a 0.50 53.00 103.45 a 464.00 865.50 1005.50 1073.50 561.00 332.73 a 10.00 l 1.50 4460.68
1962 5.00 9.50 3.50 255.50 616.00 758.00 909.50 919.00 561.00 353.29 b 60.00 26.57 c 4476.86
1963 2.50 8.00 127.50 213.75 b 573.50 948.00 1081.38 a 983.00 746.79 b 594.50 51.21 a 0.00 5330.13
1964 0.00 1.00 8.50 303.00 674.50 846.00 1176.50 911.50 632.07 a 344.50 76.00 0.00 4973.57
1965 0.00 8.50 2.00 244.00 603.50 824.50 1060.64 c 998.00 366.50 407.00 54.50 0.00 4569.14
1966 0.00 0.00 102.00 124.50 498.00 857.50 1215.00 906.00 609.50 270.50 17.50 0.00 4600.50
1967 2.00 4.00 111.50 243.50 446.50 756.00 957.00 946.00 692.00 325.50 20.00 0.00 4504.00
1968 0.50 0.00 146.50 217.00 414.22 b 851.79 b 1031.00 957.00 634.00 336.50 32.50 0.00 a 4621.01
1969 0.00 0.00 0.00 330.00 656.68 a 694.50 1046.52 b 1087.07 a 714.50 169.00 41.50 5.00 4744.77
1970 0.00 5.00 0.00 195.00 631.00 915.00 1126.00 1093.50 742.00 302.00 11.00 0.00 5020.50
1971 0.00 0.00 56.50 309.50 498.00 980.50 972.00 1109.00 679.50 387.50 28.50 0.00 5021.00
1972 0.00 0.00 42.00 188.50 593.50 832.50 970.00 989.00 689.50 250.00 0.00 2.00 4557.00
1973 1.00 1.50 59.50 233.00 534.50 865.50 1058.50 1164.00 619.50 440.00 31.00 0.00 5008.00
1974 2.50 5.50 70.00 290.00 512.50 806.50 1222.50 924.50 601.00 417.00 31.00 0.00 4883.00
1975 0.00 0.00 31.50 173.00 627.50 821.00 1194.00 1079.00 618.50 410.50 117.00 1.00 5073.00
1976 0.00 38.50 114.50 353.50 597.00 956.50 1209.50 1185.50 743.00 262.50 25.00 0.00 5485.50
1977 0.00 9.00 65.50 419.00 795.00 932.00 1163.00 916.00 700.00 282.50 56.50 0.00 5338.50
1978 0.00 0.00 83.50 211.00 576.50 880.50 1065.00 1058.00 890.50 366.00 98.50 0.00 5229.50
1979 0.00 0.00 30.50 211.00 479.50 850.00 1038.50 969.50 854.50 349.00 14.50 11.50 4808.50
1980 5.50 0.00 36.00 344.00 681.00 958.50 1192.00 1075.00 772.50 324.00 81.00 1.50 5471.00
1981 11.00 36.00 97.50 439.00 533.50 873.50 1118.50 1028.50 786.50 324.00 132.00 0.00 5380.00
1982 0.00 16.50 29.50 233.00 637.00 715.50 1078.00 999.50 634.00 273.00 12.50 7.00 4635.50
1983 0.00 23.00 50.00 107.50 437.50 756.50 1102.00 1204.50 723.00 338.00 67.50 0.00 4809.50
1984 0.00 6.00 12.00 178.50 519.50 850.00 1043.50 1104.00 565.50 330.00 47.00 0.50 4656.50
1985 0.00 3.50 64.00 384.50 747.50 723.00 1074.00 860.50 587.00 291.50 20.50 0.00 4756.00
1986 0.00 0.00 130.00 231.50 615.50 938.00 1096.50 932.50 593.00 306.00 22.50 0.00 4865.50
1987 7.75 a 10.00 61.00 358.50 699.00 936.50 1128.50 892.50 681.50 208.50 81.00 1.00 5065.75
1988 0.00 4.00 67.00 207.00 662.00 1059.50 1099.00 1100.50 675.00 239.00 53.00 3.00 5169.00
1989 5.00 0.00 44.00 279.50 567.50 794.00 1141.50 1059.50 662.00 359.00 40.00 2.00 4954.00
1990 4.00 5.50 53.50 268.00 489.50 829.00 981.00 999.00 809.50 275.50 87.00 3.50 4805.00
1991 0.00 8.50 40.00 247.00 563.00 902.00 1018.50 1024.00 619.00 256.00 5.50 0.00 4683.50
1992 0.00 14.00 45.00 138.00 539.50 695.00 728.00 749.50 553.50 264.50 0.00 0.00 3727.00
1993 0.00 0.00 47.00 121.50 439.50 640.50 825.00 873.00 412.50 223.00 6.00 0.00 3588.00
1994 0.00 0.00 41.50 199.00 586.00 805.50 886.50 868.00 656.50 305.50 37.00 0.00 a 4385.50
1995 0.00 11.50 68.00 45.00 362.00 787.00 988.50 1034.00 584.00 211.00 7.00 1.00 4099.00
1996 0.00 7.50 8.50 109.50 404.50 822.50 913.00 991.00 589.50 249.50 7.50 0.00 4103.00
1997 0.00 0.00 49.00 165.50 399.50 840.50 993.00 911.50 672.00 357.50 11.50 0.00 4400.00
1998 4.50 13.50 50.00 227.00 633.00 674.00 1044.00 1003.00 820.50 266.50 41.00 26.50 4803.50
1999 0.00 a 20.50 66.50 196.00 521.50 759.83 a 1061.48 b 972.50 520.34 a 234.00 124.50 4.00 4481.16
2000 0.00 37.50 109.50 209.50 588.50 751.50 1057.50 1074.50 692.50 351.50 26.00 0.00 4898.50
2001 0.00 0.00 0.00 197.68 b 572.00 813.50 1100.00 1064.00 677.00 265.50 172.00 0.00 4861.68
2002 6.50 16.50 10.50 217.00 387.00 954.50 1202.50 998.00 705.50 124.00 38.50 1.50 4662.00
2003 6.50 0.50 92.50 297.50 482.00 768.50 1085.00 1086.50 663.50 402.00 27.00 0.00 4911.50
2004 0.50 5.00 100.00 263.00 527.50 689.00 987.50 818.50 740.50 283.50 59.50 0.50 4475.00
2005 3.50 8.00 39.00 268.50 456.50 874.00 1155.55 b 1040.50 378.00 m 316.00 104.00 0.00 4265.55
2006 7.50 0.00 41.00 331.50 557.50 924.50 1237.50 1058.00 515.50 247.50 77.50 0.00 4998.00
2007 0.00 0.00 164.00 242.00 654.00 878.00 1130.50 0.00 z 706.50 330.00 62.00 0.00 4167.00
2008 0.00 0.00 20.00 134.50 418.50 745.50 1041.50 998.50 656.50 274.50 77.00 0.00 4366.50
2009 0.00 1.50 51.50 196.50 553.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 802.50
Period of Record Statistics
MEAN 1.47 6.91 59.27 242.72 558.22 839.35 1080.26 1027.34 687.24 338.95 52.54 2.83 4890.52
S.D. 3.21 11.43 50.97 92.85 115.07 109.45 114.47 101.54 105.67 96.38 38.75 8.40 473.98
SKEW 2.96 2.52 1.30 0.31 0.53 0.61 0.19 0.14 0.02 0.45 0.76 5.26 0.10
MAX 20.00 65.50 280.50 506.00 985.00 1236.50 1469.00 1287.00 954.00 604.00 172.00 67.00 6074.65
MIN 0.00 0.00 0.00 45.00 307.00 590.00 728.00 749.50 366.50 113.00 0.00 0.00 3588.00
NO YRS 104 105 101 103 105 104 107 104 104 107 102 108 87