MILBANK 2 SSW, SOUTH DAKOTA

Monthly Total Heating Degree Days

(395536)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200908
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
1893 0.00 z 154.00 y 1285.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1651.78 a 2937.28
1894 1801.10 a 1361.00 984.50 575.00 235.00 15.00 a 2.67 b 10.85 a 113.00 u 587.50 1177.76 a 1272.00 8022.38
1895 1887.50 1562.00 1068.98 a 272.00 o 254.50 64.00 81.50 33.58 a 202.00 561.00 g 1136.50 1496.27 a 7786.83
1896 0.00 z 1376.46 a 1505.57 a 630.50 177.50 53.00 22.50 36.50 260.69 a 0.00 z 1482.00 1355.50 6900.22
1897 1822.00 1445.50 1436.85 a 617.50 279.00 163.50 9.00 47.50 74.00 475.50 1130.50 1580.00 9080.85
1898 1394.50 1334.00 1095.00 624.50 321.00 49.00 16.00 25.00 162.00 718.00 1184.50 1486.50 8410.00
1899 1599.50 1616.50 1568.00 625.50 309.00 53.00 9.50 18.50 251.50 473.50 746.00 1406.50 8677.00
1900 1476.24 b 1663.00 0.00 z 467.50 207.50 86.00 23.00 0.00 199.00 295.00 1058.50 1260.00 6735.74
1901 1491.00 1468.00 1046.00 571.00 216.00 94.20 e 0.00 9.50 244.50 403.00 a 1068.50 1464.00 8075.70
1902 1410.50 1320.00 941.00 627.50 240.00 134.50 16.50 41.50 270.00 481.53 a 940.00 1602.50 8025.53
1903 1630.50 1521.00 1133.00 574.00 240.00 87.00 22.00 58.90 a 165.50 0.00 z 0.00 z 0.00 z 5431.90
1904 1007.50 p 1794.24 b 1113.86 b 741.50 252.28 b 110.00 38.00 66.50 224.46 b 490.50 750.00 1501.50 7082.84
1905 1850.50 1555.04 a 933.00 683.00 399.00 100.00 30.00 2.50 102.50 660.50 881.00 1370.00 8567.04
1906 1420.50 1365.00 1400.50 541.55 a 342.55 a 89.00 29.50 27.38 a 132.86 b 585.50 1056.96 b 1562.00 8553.31
1907 2006.50 1361.00 1077.00 912.00 608.50 130.50 18.00 56.50 291.50 598.00 999.50 1349.53 a 9408.53
1908 1364.00 a 1402.50 1243.00 612.00 338.00 126.72 a 16.02 a 63.55 a 118.00 603.00 883.00 1499.00 8268.79
1909 1677.50 1437.00 1140.28 a 859.50 354.00 74.50 21.50 19.00 190.50 645.50 1019.50 1737.50 9176.28
1910 1624.92 a 1538.50 679.50 539.50 396.50 134.00 19.50 59.50 216.00 393.00 0.00 z 1495.50 7096.42
1911 1837.00 1349.50 966.17 a 679.50 234.00 32.00 41.00 89.00 227.50 659.00 1390.00 1359.50 8864.17
1912 2111.00 1467.61 a 1345.00 560.50 265.50 151.50 32.50 63.50 341.50 542.50 a 880.18 b 1313.50 9074.79
1913 1702.00 1555.56 a 1354.18 a 580.50 402.50 80.50 27.00 6.50 257.00 744.00 824.00 1208.50 8742.24
1914 1498.00 1659.50 1164.16 c 710.69 a 302.25 a 50.69 a 10.50 84.50 190.00 409.50 869.48 a 1750.00 8699.27
1915 1745.30 a 1245.50 1247.50 395.00 414.00 159.83 a 61.50 107.50 226.00 487.00 934.00 1451.50 8474.63
1916 1952.00 1602.50 1241.03 a 699.50 372.52 a 152.00 0.00 55.50 271.50 659.50 1015.86 a 1781.97 b 9803.88
1917 1817.00 1726.50 1213.50 750.52 a 395.00 151.61 b 23.77 a 63.50 236.00 876.00 836.50 1837.50 9927.39
1918 1965.50 1435.00 890.00 724.50 313.00 0.00 z 27.50 18.08 a 318.00 432.50 882.50 1320.00 8326.58
1919 1332.50 1398.00 1124.00 609.00 276.00 72.50 0.00 15.50 150.50 753.50 1247.00 1586.00 8564.50
1920 1712.00 1362.00 1056.50 838.00 267.00 80.00 8.50 33.50 124.00 351.00 1020.00 1363.50 8216.00
1921 1337.50 1092.50 1040.57 a 511.50 277.00 32.00 5.50 16.00 139.50 455.00 1255.00 1316.00 7478.07
1922 1587.50 1596.50 1041.00 571.00 165.50 17.00 26.50 9.50 141.00 454.50 837.50 0.00 z 6447.50
1923 1499.50 1495.00 1290.00 620.00 283.02 d 52.00 0.00 32.00 99.00 538.00 787.76 a 1118.67 b 7814.95
1924 1704.48 a 1219.00 1109.05 b 563.79 a 456.50 99.50 25.50 32.50 218.00 290.00 962.50 1800.50 8481.33
1925 1587.20 a 1195.00 936.41 b 365.50 365.50 104.50 23.00 9.50 143.50 856.50 975.00 a 1433.50 7995.11
1926 1534.00 1153.25 d 1167.50 601.00 148.00 115.00 7.50 16.00 282.50 570.50 1163.04 b 1566.02 a 8324.30
1927 1492.00 1209.50 966.50 576.00 401.40 b 161.50 29.50 72.00 240.00 0.00 z 1186.55 a 1924.58 a 8259.53
1928 1463.95 b 1276.00 1022.50 818.50 98.00 p 135.50 5.00 34.50 220.50 539.00 878.50 1204.00 7597.95
1929 1991.50 1626.00 942.50 584.50 402.00 84.00 1.50 31.00 346.00 579.50 1186.00 1540.50 9315.00
1930 1949.50 1073.00 1142.00 599.00 394.50 122.50 11.50 9.50 176.00 626.50 997.00 1326.50 8427.50
1931 1270.00 975.50 1096.88 a 525.00 159.00 q 25.00 1.50 34.50 104.50 405.50 876.00 885.50 j 5314.38
1932 582.00 s 1310.70 a 1318.00 588.00 238.50 6.50 14.43 b 10.50 175.00 541.31 e 1039.50 1490.00 6732.44
1933 1336.00 1391.00 1006.00 605.00 257.00 0.00 r 0.00 s 5.50 55.00 537.00 987.50 1486.50 7666.50
1934 1341.50 1181.50 1069.00 560.00 89.50 15.00 1.50 34.00 237.41 a 340.50 843.50 1512.50 7225.91
1935 1710.50 1023.00 968.50 710.50 397.00 113.50 0.00 49.50 185.50 597.02 b 1228.00 1483.50 8466.52
1936 2105.00 2047.00 1037.00 743.00 100.00 37.50 0.00 0.00 109.00 571.50 1041.00 1323.00 9114.00
1937 1962.50 1434.50 1159.50 671.50 176.50 67.00 2.00 1.50 160.00 560.50 1025.50 1531.50 8752.50
1938 1655.50 1363.50 868.50 524.50 303.00 30.00 0.00 0.00 97.00 296.00 1067.50 1316.00 7521.50
1939 1434.50 1598.50 1014.00 604.00 95.00 21.00 0.00 8.50 141.50 506.00 760.00 1051.42 a 7234.42
1940 1799.00 1338.00 1216.00 649.00 236.00 33.00 3.00 50.00 90.50 292.50 1155.00 1252.50 8114.50
1941 1513.50 1359.50 1073.00 455.00 122.00 77.50 11.50 13.50 159.50 428.00 871.50 1167.00 7251.50
1942 1304.50 1235.00 896.50 386.50 317.50 63.00 4.50 14.00 279.00 463.00 896.00 1553.00 7412.50
1943 1871.50 1249.00 1243.50 489.50 324.50 71.50 1.50 7.00 179.00 440.50 997.00 1248.50 8123.00
1944 1138.00 1311.00 1258.50 683.00 194.00 38.00 3.00 33.00 109.50 380.00 890.00 1338.00 7376.00
1945 1503.00 1251.50 758.50 639.50 358.50 132.50 15.00 6.50 220.00 448.50 1044.00 1651.50 8029.00
1946 1546.38 a 1364.00 760.50 384.50 312.50 78.00 0.00 26.50 168.50 510.00 990.50 1370.50 7511.88
1947 1279.50 1413.00 1124.00 673.50 342.50 67.50 7.50 5.00 175.00 268.00 1161.00 1482.00 7998.50
1948 1684.00 1453.11 a 1255.50 482.00 222.00 44.50 0.50 8.00 87.50 431.00 910.34 a 1377.50 7955.95
1949 1695.00 1453.50 1068.98 a 476.00 142.50 22.50 5.68 a 13.00 207.00 441.50 749.48 a 1447.50 7722.65
1950 1979.00 1330.50 1211.50 853.50 353.50 33.50 10.00 40.00 109.50 389.64 b 1100.00 1587.50 8998.14
1951 1750.47 a 1247.00 1450.50 707.00 151.50 127.00 13.00 27.00 267.93 a 569.00 1171.03 a 1610.50 9091.93
1952 1668.50 1249.00 1331.00 520.50 253.17 a 26.50 2.50 11.50 126.50 572.00 901.00 1310.50 7972.67
1953 1509.50 1238.50 1046.50 714.50 288.00 60.00 13.50 3.00 140.50 299.50 803.28 a 1359.50 7476.28
1954 1795.50 894.00 1156.50 581.50 383.37 a 68.50 1.00 6.50 176.00 575.00 776.00 1263.00 7676.87
1955 1505.50 1496.50 1209.50 338.00 103.50 54.50 0.00 5.50 174.00 416.50 1250.50 1722.00 8276.00
1956 1706.00 1496.50 1206.50 770.50 247.50 12.50 6.50 28.00 195.00 289.50 965.00 1245.50 8169.00
1957 1804.72 a 1262.00 1048.00 585.50 302.50 45.00 0.00 22.73 a 202.50 518.73 a 937.00 1177.00 7905.68
1958 1328.87 a 1373.08 b 1092.50 575.50 128.50 l 150.00 24.00 h 21.50 130.50 329.50 f 975.56 c 1555.17 d 7202.67
1959 1754.08 a 1437.69 b 951.59 c 0.00 z 0.00 z 0.00 z 0.00 z 1.03 a 149.42 d 695.50 1203.62 a 1094.41 c 7287.35
1960 1571.91 b 1415.82 a 1443.05 a 472.00 h 243.00 65.36 b 16.50 8.00 169.50 477.00 726.50 f 1469.00 6879.14
1961 1556.09 c 1174.50 592.00 l 748.45 a 326.00 22.00 0.00 0.00 206.54 d 380.94 e 981.50 1610.45 a 7006.47
1962 1682.50 1450.08 b 1257.05 a 663.10 a 185.00 55.00 13.50 4.50 190.00 393.50 800.00 1336.00 8030.23
1963 1781.47 a 1316.50 900.03 a 490.50 262.00 24.00 4.50 23.50 91.00 222.00 808.50 1628.00 7552.00
1964 1365.00 1195.00 1294.00 528.00 160.50 53.50 5.00 58.00 217.50 453.50 987.00 1670.38 a 7987.38
1965 1797.00 1466.50 1442.00 638.50 215.00 11.50 4.50 32.00 430.00 393.00 962.50 1158.50 8551.00
1966 1952.00 1437.50 913.50 741.00 327.50 54.00 0.00 57.00 189.50 463.50 1099.50 1409.50 8644.50
1967 1525.50 1523.00 989.50 597.50 387.00 46.50 28.00 35.50 125.00 524.50 972.00 1360.00 8114.00
1968 1560.00 1484.50 771.50 541.00 334.00 41.00 10.50 36.00 134.48 a 487.50 933.00 1573.50 7906.98
1969 1903.00 1362.50 1375.50 550.00 219.50 151.50 5.50 0.00 140.00 664.00 935.00 1384.50 8691.00
1970 1858.50 1312.50 1215.50 643.50 197.00 33.50 8.00 3.00 177.00 510.50 1050.00 1512.50 8521.50
1971 1821.00 1334.50 1044.00 507.50 282.00 20.50 23.50 17.50 173.50 430.00 1003.50 1486.50 8144.00
1972 1735.00 1554.50 1124.50 670.00 227.00 51.50 17.00 21.50 162.50 591.00 1008.50 1660.50 8823.50
1973 1456.00 0.00 z 816.50 599.00 232.50 16.50 2.00 0.50 188.50 313.10 a 972.50 1531.92 a 6129.02
1974 1605.11 d 1337.00 1104.00 537.50 311.03 a 42.41 a 0.00 32.03 a 198.50 424.00 925.00 1258.50 7775.09
1975 1497.00 1415.56 a 1241.50 830.50 189.00 42.50 8.00 6.50 195.00 404.00 909.50 1408.50 8147.56
1976 1687.36 b 1132.00 1141.50 505.00 300.00 39.00 4.00 8.00 206.50 697.50 1151.50 1619.50 8491.86
1977 1970.00 1230.00 1006.00 448.50 86.00 24.50 11.50 52.00 154.50 556.50 1099.00 1639.00 8277.50
1978 1978.83 a 1619.00 696.00 i 696.50 263.50 80.00 31.50 32.50 178.50 560.00 1102.50 1577.00 8119.83
1979 2068.00 1784.00 1335.50 848.50 472.50 112.00 11.50 63.00 169.00 621.50 1081.50 1258.60 a 9825.60
1980 1626.00 1520.00 1339.00 560.00 223.20 a 57.00 11.37 a 35.50 234.50 658.00 898.00 1494.00 8656.57
1981 1495.00 1231.00 949.00 510.00 333.50 50.19 d 20.50 25.00 222.41 a 597.50 869.50 1599.00 7902.61
1982 2128.00 1510.50 1186.50 760.00 0.00 z 0.00 z 3.50 52.91 b 248.00 549.98 b 1155.00 a 0.00 z 7594.40
1983 0.00 z 1133.50 1085.50 762.00 386.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3367.50
1984 1617.00 0.00 z 1323.46 e 655.50 347.00 60.00 7.00 16.50 288.62 a 539.00 974.50 1587.41 b 7416.00
1985 1770.10 a 1472.00 973.50 0.00 z 0.00 z 0.00 z 0.00 z 79.50 299.00 615.00 0.00 z 1791.50 7000.60
1986 0.00 z 1514.50 1009.57 a 603.00 261.00 44.50 4.50 76.00 220.00 544.00 1154.00 1254.00 6685.07
1987 1382.50 938.50 1010.00 432.00 176.70 a 29.48 a 10.00 60.50 147.00 655.50 857.50 1279.00 6978.68
1988 1727.50 1521.50 1043.00 603.00 116.50 6.50 6.50 37.00 187.50 648.00 1046.00 1379.50 8322.50
1989 1452.50 1633.50 1307.50 638.00 263.00 97.00 1.00 9.00 204.00 538.00 1140.00 1726.50 9010.00
1990 1202.50 1281.50 997.00 651.50 340.50 0.00 z 23.25 a 37.50 154.14 a 616.00 910.50 1569.50 7783.89
1991 0.00 z 0.00 z 1072.00 278.50 n 243.00 19.00 2.50 3.00 0.00 z 0.00 z 0.00 z 1267.00 2606.50
1992 1377.95 a 1105.00 950.50 738.00 214.00 91.00 69.50 91.00 208.00 584.50 1129.00 1579.50 8137.95
1993 1733.00 1483.50 1145.50 685.00 292.50 122.50 17.50 21.00 323.00 628.00 1152.00 1478.70 a 9082.20
1994 2026.00 1631.50 981.00 614.50 200.50 37.00 11.50 53.00 142.50 456.50 884.00 1304.00 8342.00
1995 1584.00 1299.00 1100.00 778.00 326.00 48.50 16.00 6.50 230.50 602.00 1202.50 1503.50 8696.50
1996 1911.50 1423.50 1351.00 754.50 394.00 47.50 0.00 z 4.50 244.50 0.00 z 1409.00 0.00 z 7540.00
1997 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
1998 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
1999 1122.00 i 1096.00 0.00 z 589.50 233.50 72.50 3.00 16.50 202.50 603.00 751.00 1241.00 4808.50
2000 1629.50 1160.00 846.50 663.00 200.00 79.50 25.50 13.50 191.00 481.50 1141.50 1906.00 8337.50
2001 1468.00 1647.50 1275.00 647.50 204.00 58.50 7.00 7.00 184.50 568.50 665.50 1300.50 8033.50
2002 1398.00 1038.00 1440.00 677.50 428.00 32.00 5.00 21.50 158.00 782.00 997.00 1272.00 8249.00
2003 1607.50 1479.50 1130.50 572.00 324.50 68.50 0.00 12.50 205.50 480.00 1127.50 1317.50 8325.50
2004 1747.50 1363.50 928.50 555.00 351.50 98.50 32.50 93.00 119.00 518.50 849.50 1334.00 7991.00
2005 1698.00 1170.00 1071.00 492.00 304.50 6.50 12.00 23.00 83.00 521.00 862.22 c 1118.00 g 6243.22
2006 1204.50 1321.25 d 1031.00 440.00 258.50 26.50 0.50 0.00 255.00 684.00 996.50 1206.00 7423.75
2007 0.00 z 1545.04 c 952.45 b 725.50 185.50 33.00 4.50 28.42 a 203.50 463.00 648.00 f 0.00 z 4140.91
2008 0.00 z 0.00 z 0.00 z 776.00 375.50 77.50 9.50 17.50 200.00 590.50 1020.00 1737.55 a 4804.05
2009 1870.00 1416.50 1269.00 708.50 317.50 127.50 48.00 64.50 0.00 z 0.00 z 0.00 z 0.00 z 5821.50
Period of Record Statistics
MEAN 1650.06 1382.88 1118.10 618.65 279.06 68.38 13.13 28.85 190.16 519.14 1002.20 1452.64 8306.12
S.D. 226.82 189.38 175.35 114.53 92.63 42.05 14.57 24.74 63.97 126.39 152.64 183.47 614.69
SKEW 0.04 0.12 0.16 0.05 0.23 0.62 2.07 0.98 0.63 0.12 0.44 0.28 0.33
MAX 2128.00 2047.00 1568.00 912.00 608.50 163.50 81.50 107.50 430.00 876.00 1482.00 1924.58 9927.39
MIN 1138.00 894.00 679.50 338.00 86.00 6.50 0.00 0.00 55.00 222.00 665.50 1051.42 6978.68
NO YRS 105 110 110 109 108 107 108 113 110 105 106 106 81