COLUMBIA 8 N, SOUTH DAKOTA

Monthly Total Heating Degree Days

(391873)

Base Temperature = 65 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 131.50 q 420.00 g 771.50 1554.00 2325.50
1950 2089.50 1478.00 1232.50 868.89 c 389.05 a 65.17 a 24.91 c 49.60 a 177.00 514.82 c 1261.07 b 1636.80 a 9787.31
1951 1833.65 a 1336.22 a 1458.03 a 676.61 b 227.50 159.64 b 26.00 54.52 b 250.56 c 611.73 a 1164.50 1812.90 e 9611.87
1952 1845.69 e 1353.33 b 1370.95 b 548.50 279.55 c 43.93 b 8.02 b 21.00 139.50 663.92 a 965.17 a 1175.50 f 7239.56
1953 1605.80 a 1317.08 b 1089.65 a 767.68 b 321.50 30.50 f 13.00 6.00 170.50 369.93 a 918.33 c 1419.80 a 7999.27
1954 1941.24 b 905.69 b 1193.50 d 630.00 455.59 c 83.28 a 8.86 c 6.20 a 118.50 j 428.00 h 835.56 c 1386.96 d 7446.87
1955 1577.38 a 1530.08 d 980.00 f 371.67 c 128.81 b 81.50 2.58 a 11.88 a 176.00 f 488.54 d 1385.00 1815.88 e 7393.33
1956 1756.27 e 1659.00 1277.50 815.50 270.22 a 13.45 a 6.50 26.50 207.50 412.19 d 1011.00 1309.23 a 8764.85
1957 1853.50 1355.31 b 1101.50 621.50 313.50 71.50 0.00 a 25.32 a 238.97 a 560.58 a 1003.00 1223.00 8367.67
1958 1407.00 1430.00 1065.00 566.40 e 194.86 c 168.10 a 35.13 a 30.48 a 128.00 502.89 d 939.31 a 1560.00 8027.18
1959 1764.33 b 1567.50 969.00 580.86 a 317.20 c 33.50 6.50 4.65 a 188.00 f 576.00 f 1235.36 b 883.00 h 6478.89
1960 1680.20 a 1561.00 1516.50 631.50 285.00 64.50 17.50 18.00 192.00 513.50 1013.00 1601.09 d 9093.79
1961 1688.97 b 1309.00 918.50 743.79 a 378.50 38.00 12.50 4.43 c 256.50 h 375.00 i 1027.76 a 1194.50 i 6121.45
1962 1345.00 g 1485.68 c 1290.50 628.97 a 215.00 61.55 a 21.70 a 6.50 o 74.50 u 507.48 d 924.23 d 1369.74 d 6504.85
1963 1955.14 b 1401.04 a 898.45 c 558.00 282.50 20.00 0.00 i 17.50 i 108.50 271.50 918.50 1702.00 8115.62
1964 1511.50 1192.50 1290.00 557.00 228.92 e 35.00 h 2.50 54.50 236.50 516.67 a 1089.50 1798.50 8478.09
1965 1920.50 1507.00 1424.50 653.50 241.00 37.50 1.00 18.00 419.46 b 432.50 1021.50 1246.50 8922.96
1966 2022.75 a 1552.50 961.50 799.66 a 357.00 98.00 0.00 60.34 c 129.50 g 556.93 b 1203.89 c 1170.50 f 7612.56
1967 1277.50 g 1071.00 i 1008.03 b 481.50 g 335.50 f 39.23 d 15.50 g 20.09 d 84.50 i 333.50 q 993.50 1480.50 3541.36
1968 1664.50 1455.50 861.50 595.50 398.50 60.00 18.00 41.50 166.00 531.00 974.50 1649.00 8415.50
1969 1945.00 1359.50 1485.50 556.50 233.00 152.50 5.00 2.50 139.50 681.50 943.00 1433.00 8936.50
1970 1947.50 1375.00 1330.50 673.50 236.00 27.00 8.50 8.50 202.50 549.00 1092.00 1588.00 9038.00
1971 1910.00 1456.00 1081.00 533.00 315.00 23.50 31.00 17.50 k 195.50 501.00 1022.00 1643.00 8711.00
1972 1878.00 1674.00 1217.50 666.00 230.00 54.00 19.00 28.50 184.00 621.50 1066.50 1766.50 9405.50
1973 1536.50 1181.50 864.00 607.50 253.00 28.00 8.50 0.00 c 166.50 g 412.96 c 1080.00 b 1578.50 7550.46
1974 1791.00 1366.00 1107.50 568.50 319.00 70.00 1.50 44.43 a 224.00 446.00 986.50 0.00 z 6924.43
1975 841.50 n 877.00 k 970.00 i 666.50 g 178.50 i 74.42 d 7.50 16.00 239.46 b 487.50 967.00 1477.00 3268.89
1976 1712.00 1165.50 1141.66 b 501.50 0.00 z 36.00 4.13 a 6.95 b 175.00 693.00 172.00 x 1277.50 f 5435.74
1977 1980.12 c 1148.00 a 996.00 374.00 73.07 c 20.00 3.62 a 40.82 a 131.50 j 226.00 q 698.50 k 981.50 m 4635.63
1978 898.00 r 791.00 n 709.00 m 332.00 n 100.00 m 38.50 k 4.77 e 19.00 119.50 499.50 1187.00 1655.50 3485.27
1979 2028.00 1757.00 1255.50 805.50 410.00 61.00 6.00 53.14 c 112.00 570.00 1092.00 1215.50 9365.64
1980 1661.82 c 1470.50 1234.00 520.50 185.00 39.00 0.50 18.17 b 163.00 582.00 900.00 a 1438.50 8212.99
1981 1516.50 1222.50 936.50 484.00 296.00 62.50 16.00 8.50 184.50 592.50 854.50 1609.50 7783.50
1982 2118.50 1467.00 1208.50 679.50 255.00 123.50 0.00 44.00 235.50 599.00 1187.50 1320.00 9238.00
1983 1393.50 1121.00 1070.00 718.00 386.00 86.50 7.50 0.50 255.50 612.00 1063.00 2047.50 8761.00
1984 1602.50 1116.50 1287.00 648.00 369.00 62.50 13.50 18.00 374.50 605.00 1068.00 1731.87 a 8896.37
1985 1878.50 1471.50 989.00 506.50 166.00 160.50 8.00 86.50 359.00 636.50 1539.50 1855.50 9657.00
1986 1224.50 f 1567.50 1005.50 687.00 250.50 50.50 6.50 57.72 b 285.50 568.00 1227.50 1323.50 7029.72
1987 1344.00 1006.50 1045.22 a 362.59 a 138.47 a 36.50 11.00 78.00 175.00 693.00 966.00 1304.00 7160.27
1988 1756.50 1517.00 1039.00 581.50 145.50 0.00 5.00 44.00 245.50 695.00 1123.50 1512.50 8665.00
1989 1631.00 1753.00 1339.00 645.00 224.50 78.00 0.50 18.50 241.50 591.50 1154.50 1820.50 9497.50
1990 1289.50 1298.50 990.00 671.00 359.00 80.00 16.00 27.50 181.50 666.00 958.50 1676.50 8214.00
1991 1751.00 1139.70 a 1057.00 511.50 243.00 22.00 16.50 5.50 231.00 672.00 1266.00 1374.50 8289.70
1992 1417.50 1129.50 947.00 704.00 246.00 108.00 85.50 91.50 252.50 624.50 1139.48 a 1631.00 8376.48
1993 1859.00 1577.00 1207.00 694.50 315.00 168.00 49.00 41.50 351.00 691.50 1194.50 1546.00 9694.00
1994 2103.00 1746.00 1070.00 641.00 196.00 35.50 19.00 63.00 188.00 526.00 966.00 1513.00 9066.50
1995 1703.00 1397.50 1252.50 813.50 365.00 66.50 15.50 1.50 268.50 645.00 1210.50 1527.50 9266.50
1996 1951.00 1415.82 a 1428.50 790.50 394.00 63.00 22.00 11.50 234.50 637.50 1445.00 1843.50 10236.82
1997 1972.50 1416.50 1331.00 816.00 381.50 10.00 25.50 46.00 131.50 547.50 1212.00 1254.50 9144.50
1998 1610.00 1061.00 1287.00 496.50 170.50 116.50 3.50 1.50 116.50 576.00 981.50 1320.50 7741.00
1999 1804.00 1110.50 973.00 598.00 239.50 67.00 5.50 21.50 285.00 643.50 763.50 1189.00 7700.00
2000 1601.50 1201.00 878.00 667.50 247.00 99.50 35.00 22.50 211.50 506.50 1281.50 1881.00 8632.50
2001 1546.38 a 1667.50 1285.50 624.00 191.00 61.50 7.50 12.00 182.00 0.00 z 753.00 1408.00 7738.38
2002 1480.00 1077.50 1372.50 700.50 414.00 34.00 6.50 21.50 195.50 844.00 1018.00 1345.50 8509.50
2003 1632.00 1522.00 1175.50 609.50 319.50 75.50 0.50 11.00 257.00 506.50 1217.50 1344.00 8670.50
2004 1789.00 1399.50 970.50 619.50 371.50 131.50 40.00 113.00 177.00 579.50 928.50 1335.50 8455.00
2005 1797.00 1231.00 1122.50 529.00 381.00 39.00 15.00 30.50 130.50 539.50 956.00 1482.50 8253.50
2006 1274.00 1335.00 1078.50 497.50 285.50 43.00 3.50 12.50 301.00 708.50 1021.50 1265.50 7826.00
2007 1670.00 1617.00 971.50 729.00 163.00 42.00 3.50 36.50 215.50 494.50 1004.00 1663.00 8609.50
2008 1774.50 1615.00 1161.00 748.00 347.00 72.00 6.50 15.50 186.50 582.50 983.50 1746.50 9238.50
2009 1861.00 1418.00 1281.00 696.00 301.50 132.00 26.50 41.00 94.00 757.50 798.50 1650.50 9057.50
2010 1772.50 1533.00 994.00 417.50 303.50 26.00 0.50 9.50 224.00 464.50 1034.00 1634.50 8413.50
2011 1855.00 1534.00 1389.00 695.00 334.00 66.00 0.00 1.50 204.50 469.00 994.00 1273.00 8815.00
2012 1369.00 1229.50 742.85 d 538.20 e 217.50 39.50 0.00 31.50 221.50 664.50 1050.00 1540.50 7644.55
2013 1594.50 1461.00 884.00 m 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 3055.50
Period of Record Statistics
MEAN 1732.64 1388.93 1142.09 625.70 280.59 66.38 12.72 28.60 210.85 569.07 1054.08 1532.15 8731.71
S.D. 209.38 196.67 179.86 114.68 83.69 41.19 14.52 24.55 68.02 100.60 157.47 202.49 661.87
SKEW -0.29 -0.25 0.12 -0.18 -0.13 0.96 2.54 1.26 0.82 -0.13 0.62 0.24 -0.10
MAX 2118.50 1757.00 1516.50 868.89 455.59 168.10 85.50 113.00 419.46 844.00 1539.50 2047.50 10236.82
MIN 1274.00 905.69 742.85 362.59 73.07 0.00 0.00 0.00 94.00 271.50 753.00 1189.00 7160.27
NO YRS 59 61 60 60 59 60 61 60 54 57 62 57 43