MELLETTE 4 W, SOUTH DAKOTA

Monthly Total Heating Degree Days

(395456)

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
1893 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
1894 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
1895 0.00 z 0.00 z 0.00 z 0.00 z 120.50 n 76.00 1.50 i 11.62 c 99.81 d 0.00 z 0.00 z 0.00 z 187.43
1896 0.00 z 0.00 z 0.00 z 0.00 z 186.00 48.00 0.50 4.00 166.67 c 663.40 a 1584.00 1427.50 4080.07
1897 1823.00 1594.00 1484.00 595.00 248.00 119.00 13.00 43.50 70.00 506.00 1204.50 1584.50 9284.50
1898 1372.00 1240.00 1107.00 550.00 277.00 15.00 0.00 12.50 172.00 737.59 b 0.00 z 0.00 z 5483.09
1899 0.00 z 1592.23 b 1556.50 671.38 a 272.00 42.00 5.68 a 12.00 f 268.50 573.50 616.00 g 1523.13 a 6504.93
1900 1403.00 1579.93 a 1232.00 452.50 184.50 55.50 14.00 1.00 212.68 b 373.50 1101.00 1224.50 7834.10
1901 1385.50 1371.50 997.50 479.00 182.00 56.00 s 0.00 e 0.00 x 233.50 424.50 961.00 1475.00 7509.50
1902 1439.43 a 1340.50 993.00 626.00 193.50 133.00 16.50 38.50 240.50 530.50 969.00 1653.50 8173.93
1903 1641.40 b 1615.00 1120.00 564.00 247.00 75.50 31.50 53.50 256.00 443.30 a 1038.50 1587.00 8672.70
1904 1803.00 1719.00 1226.00 700.00 271.00 94.00 29.50 52.00 205.00 431.93 a 809.44 c 1432.72 a 8773.59
1905 0.00 z 749.00 l 865.00 648.00 377.88 b 111.72 a 14.43 b 0.52 a 88.97 a 660.50 903.89 c 1466.54 e 5137.44
1906 1481.50 1342.38 b 1369.50 0.00 z 249.50 76.00 17.00 58.50 123.00 565.00 1094.50 1554.00 7930.88
1907 1990.00 1338.00 993.50 809.50 505.82 a 118.50 11.00 37.89 d 288.50 576.50 946.00 1269.50 8884.71
1908 1345.50 1340.00 1107.00 487.00 334.00 116.50 14.00 66.65 a 125.50 543.00 904.50 1423.00 7806.65
1909 1376.50 f 1387.00 1062.27 a 758.00 303.00 50.17 a 16.53 a 12.50 139.66 a 528.19 e 983.00 1774.00 7014.32
1910 1664.18 a 1597.56 a 581.52 b 414.00 388.00 107.07 a 4.50 35.65 a 180.50 369.00 1053.50 1443.00 7838.48
1911 1797.00 1410.00 844.23 a 581.50 214.00 15.00 26.50 70.50 176.50 634.50 1317.93 a 1436.00 8523.66
1912 2040.83 a 1410.00 1296.50 478.00 220.00 134.50 19.50 32.50 353.28 a 482.50 892.00 1288.50 8648.11
1913 1625.50 1414.50 1243.50 466.00 372.00 53.00 20.00 2.00 190.00 629.50 804.00 1240.50 8060.50
1914 1436.00 1621.50 1019.50 575.50 269.70 a 26.00 2.00 62.50 128.28 a 400.50 868.50 1690.50 8100.48
1915 1687.50 1244.00 1374.00 363.50 397.50 158.50 72.50 71.50 217.00 451.05 a 887.59 a 1351.17 b 8275.81
1916 1969.00 1510.00 1037.00 624.00 316.50 144.00 0.00 69.50 244.00 620.00 988.50 1779.00 9301.50
1917 1808.50 1649.00 1232.00 697.50 362.00 126.50 19.00 44.50 185.50 791.00 742.00 1744.50 9402.00
1918 1856.00 1336.00 789.00 647.00 239.00 58.00 23.00 17.00 305.00 441.00 939.00 1278.50 7928.50
1919 1293.00 1401.00 1186.50 591.00 291.50 92.00 1.00 15.00 131.38 a 787.00 1263.50 1579.50 8632.38
1920 1618.00 1251.66 a 1117.00 827.00 285.20 a 86.00 13.00 38.75 a 132.50 351.50 1008.00 1333.50 8062.11
1921 1293.00 1062.50 932.00 504.00 262.50 26.00 8.50 21.00 168.00 447.50 1185.50 1295.50 7206.00
1922 1619.00 1687.50 1075.50 549.00 189.00 28.50 25.00 6.00 123.00 0.00 z 0.00 z 1530.00 6832.50
1923 1427.50 1443.00 1187.50 622.00 242.50 58.50 2.58 a 32.50 105.50 562.50 779.50 1212.50 7676.08
1924 1779.00 1205.50 1145.50 619.50 467.00 124.00 22.50 29.00 236.00 304.00 947.50 1751.50 8631.00
1925 1673.50 1182.00 887.00 378.50 343.07 a 74.00 27.00 4.13 a 110.50 887.50 1003.00 1406.00 7976.20
1926 1466.50 1060.00 1051.50 561.00 140.00 90.52 a 0.00 12.50 264.50 524.93 a 1107.50 1508.00 7786.95
1927 1469.00 1146.00 926.00 576.00 366.00 126.50 22.00 58.00 233.00 428.50 1162.00 1947.50 8460.50
1928 1485.50 1195.50 938.00 762.50 162.50 126.00 9.00 39.27 a 248.00 536.30 a 910.00 1174.90 a 7587.47
1929 1967.00 1594.50 903.00 565.50 361.00 83.79 a 3.50 8.50 300.00 484.00 1126.00 1452.00 8848.79
1930 1858.50 975.00 1008.00 449.00 327.00 63.00 6.50 1.00 186.00 598.82 a 920.50 1218.50 7611.82
1931 1181.00 928.00 1017.00 520.00 333.00 23.00 3.00 23.00 93.50 385.50 919.00 1325.00 6751.00
1932 1684.00 1377.50 1237.50 474.00 213.90 a 2.50 12.92 a 12.92 a 178.50 648.00 1000.50 1572.00 8414.23
1933 1380.00 1426.44 a 993.50 592.00 269.50 9.50 1.00 13.00 72.50 549.00 917.50 1514.00 7737.94
1934 1333.00 1142.50 1049.00 550.00 93.00 16.50 8.00 44.00 272.00 380.00 829.14 a 1100.00 f 5717.14
1935 1704.43 d 986.50 931.50 732.00 391.00 103.50 0.00 64.00 126.50 570.50 1191.50 1484.00 8285.43
1936 2095.00 2133.00 991.48 a 727.00 167.50 45.00 0.00 0.00 124.00 587.00 1135.00 1406.00 9410.98
1937 2102.32 a 1519.50 1091.00 672.00 197.00 100.86 a 3.00 2.50 153.00 537.50 1047.50 1524.50 8950.68
1938 1641.00 1438.50 841.50 506.00 293.50 48.00 0.00 a 1.00 97.50 303.50 1098.50 1322.00 7591.00
1939 1405.50 1676.00 1025.50 599.50 98.50 57.50 0.00 17.00 173.50 561.50 857.50 1126.00 7598.00
1940 1910.12 a 1358.50 1218.50 661.50 265.00 49.00 3.00 30.00 109.00 326.00 1144.50 1283.00 8358.12
1941 1587.00 1386.50 1082.93 a 473.00 149.50 88.50 28.50 12.00 179.00 527.50 945.00 1259.12 a 7718.55
1942 1376.00 1286.00 930.52 a 446.00 380.50 85.00 15.50 12.50 311.50 528.00 1003.00 1577.00 7951.52
1943 1972.00 1246.54 b 1273.50 503.50 380.02 b 109.50 0.50 18.60 a 231.00 460.50 1032.93 a 1286.00 8514.59
1944 1255.50 1430.00 1254.50 671.00 165.50 73.50 8.27 a 24.50 166.50 438.65 a 917.50 1390.50 7795.92
1945 1505.50 1293.50 797.50 635.00 380.00 195.52 a 25.50 10.50 237.00 494.50 1045.00 1661.50 8281.02
1946 1557.50 1323.00 725.40 a 362.00 0.00 z 38.50 i 2.50 51.50 202.50 599.50 1014.83 a 1372.00 7210.73
1947 1303.00 1394.00 1129.00 689.00 361.50 83.28 a 18.60 a 5.00 175.50 309.50 1198.00 1558.78 a 8225.16
1948 1724.00 1576.50 1249.00 432.50 248.50 66.50 3.00 14.50 81.00 524.00 950.50 1470.00 8340.00
1949 1772.00 1519.50 1085.50 485.00 184.50 35.00 3.00 16.50 215.50 503.50 740.00 1533.50 8093.50
1950 2028.00 1408.50 1242.00 823.50 370.50 59.48 a 14.47 a 47.00 160.00 448.00 1156.00 1536.05 a 9293.50
1951 1750.00 1198.00 1463.50 665.50 218.00 155.50 23.00 30.50 243.62 a 577.00 1096.50 1735.50 9156.62
1952 1815.50 1334.52 a 1375.50 525.00 221.50 19.50 2.50 11.50 118.00 600.00 956.38 a 1339.00 8318.90
1953 1509.00 1222.67 a 1033.50 707.50 319.00 56.00 13.29 c 0.00 z 154.50 334.50 848.50 1365.00 7563.45
1954 1787.50 820.50 1127.50 563.50 382.50 81.50 3.10 a 3.00 139.00 558.50 774.00 1360.50 7601.10
1955 1548.50 1497.00 1152.50 334.50 145.50 79.00 0.00 7.00 198.50 436.50 1298.00 1751.50 8448.50
1956 1702.00 1629.50 1163.50 741.50 242.00 12.50 2.00 26.00 160.34 a 338.93 a 967.00 1229.50 8214.78
1957 1776.50 1240.50 1043.00 614.50 302.50 65.00 0.00 17.50 210.00 511.00 946.55 a 1163.50 7890.55
1958 1329.50 1359.00 1066.50 565.50 171.00 135.50 25.50 21.00 138.50 455.00 943.00 1568.00 7778.00
1959 1741.50 1515.63 a 902.00 563.50 283.50 31.50 2.50 1.50 174.50 669.00 1211.50 1118.50 8215.13
1960 1663.00 1518.50 1506.00 580.00 265.00 63.50 9.50 8.00 198.00 468.50 953.50 1578.50 8812.00
1961 1652.00 1296.00 873.50 719.50 354.00 41.50 4.00 2.50 289.50 467.00 964.00 1617.50 8281.00
1962 1662.00 1433.00 1303.00 590.00 177.50 65.50 26.50 12.50 212.50 450.50 831.50 1330.00 8094.50
1963 1845.00 1268.50 838.50 548.50 291.00 22.50 0.00 20.00 85.00 258.50 880.50 1657.00 7715.00
1964 1415.50 1130.00 1246.00 523.00 194.50 53.50 0.50 53.00 214.00 516.50 1071.50 1703.00 8121.00
1965 1847.00 1407.50 1388.50 618.00 234.00 37.00 0.50 28.50 432.50 418.00 984.00 1191.50 8587.00
1966 1952.00 1508.00 917.00 743.50 328.50 70.50 0.00 62.50 236.50 528.50 1134.00 1409.00 8890.00
1967 1482.32 a 1463.00 b 948.00 604.50 385.00 74.00 40.30 a 24.50 145.50 559.00 1015.00 1484.50 8225.62
1968 1633.50 1403.50 824.50 579.50 372.00 51.50 13.50 37.00 163.50 500.50 942.00 0.00 z 6521.00
1969 0.00 z 0.00 z 0.00 z 0.00 z 126.00 k 141.50 3.00 0.00 a 31.50 r 0.00 z 976.50 1427.00 2548.00
1970 1993.50 1300.00 1242.58 a 674.50 234.00 29.50 9.00 6.00 214.66 a 563.50 1070.00 1629.57 a 8966.80
1971 1881.50 1417.50 1070.50 532.50 300.00 17.50 35.28 b 18.00 211.00 508.50 1019.50 1670.79 b 8682.57
1972 1865.50 1638.50 1159.63 d 0.00 z 243.87 a 58.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1709.00 6675.00
1973 1541.50 1193.50 830.59 b 0.00 z 267.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3832.59
1974 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 66.50 f 2.07 a 51.50 265.50 490.00 1016.50 1342.00 3167.57
1975 1557.50 1505.50 1324.50 785.69 a 279.00 82.50 8.78 a 11.00 249.00 523.50 948.50 1471.50 8746.97
1976 1682.00 1119.00 1107.73 a 515.17 a 292.00 56.50 7.75 a 7.00 207.50 728.00 1194.31 a 1587.50 8504.47
1977 1974.70 a 1156.00 1044.18 a 431.00 92.00 0.50 w 5.74 d 60.00 195.50 599.00 1149.00 1696.50 8403.62
1978 2164.32 a 1673.50 1250.50 672.50 256.78 a 103.97 a 21.00 36.88 b 195.50 639.63 a 1246.50 1644.50 9905.58
1979 2073.50 1777.50 1293.00 749.00 427.00 69.11 b 10.13 e 50.50 159.00 609.84 b 0.00 z 0.00 z 7218.59
1980 0.00 z 969.50 j 1222.95 a 508.39 b 200.00 35.00 7.50 25.66 b 208.97 a 651.52 a 908.00 1414.00 5181.98
1981 1461.50 1212.00 930.50 449.00 315.68 a 65.50 22.50 11.00 190.50 636.00 877.50 1573.50 7745.18
1982 2148.00 1501.50 1212.00 701.00 253.00 149.00 0.00 z 44.00 250.00 618.50 1149.50 1327.50 9354.00
1983 1401.50 1108.50 1057.50 755.00 426.50 101.00 7.50 0.00 245.00 578.00 1057.50 2054.50 8792.50
1984 1547.00 1058.50 1218.00 601.50 347.50 55.50 10.50 18.50 357.50 592.50 1016.00 1708.00 8531.00
1985 1798.50 1415.00 978.00 491.00 164.00 145.50 14.00 73.00 329.00 629.00 1414.50 1820.50 9272.00
1986 1484.12 c 1511.50 954.50 631.00 236.50 22.00 2.50 67.50 252.50 546.00 1173.00 1275.00 8156.12
1987 1341.00 958.50 1003.50 433.00 159.00 33.50 9.00 67.50 167.00 688.50 905.00 1250.00 7015.50
1988 1749.00 1532.50 1014.00 639.00 148.50 2.50 4.50 41.50 202.00 668.50 1075.50 1440.50 8518.00
1989 1553.50 1695.50 1316.50 596.00 254.00 110.00 0.00 20.00 224.00 566.00 1082.50 1767.50 9185.50
1990 1233.50 1251.50 926.00 642.50 327.00 63.00 16.50 20.50 172.50 629.00 914.50 1666.00 7862.50
1991 1704.00 1071.50 1001.50 510.00 232.00 11.00 6.50 2.50 226.50 634.00 1219.00 1298.00 7916.50
1992 1343.00 1073.00 881.50 682.00 231.00 88.00 80.00 102.50 228.00 585.50 1090.50 1569.00 7954.00
1993 1776.00 1513.00 1127.00 667.50 296.00 138.00 25.00 41.00 344.50 647.50 1182.00 1498.50 9256.00
1994 2023.00 1700.00 1054.00 608.50 200.50 34.50 30.50 53.00 182.50 508.00 953.00 1490.00 8837.50
1995 1674.50 1350.00 1165.50 786.50 350.50 63.00 15.00 5.50 249.00 632.00 1165.00 1453.50 8910.00
1996 1872.50 1393.00 1364.00 725.00 389.50 56.00 18.00 8.00 241.50 596.00 1396.00 1827.50 9887.00
1997 1940.50 1406.50 1263.50 757.00 365.50 9.50 26.50 33.00 141.50 528.50 1164.00 1209.00 8845.00
1998 1589.50 1040.00 1251.50 533.50 170.50 113.50 4.00 2.00 98.50 537.00 938.50 1280.00 7558.50
1999 1730.50 1033.00 919.00 598.00 223.00 68.00 3.00 17.57 a 270.00 628.50 767.00 1243.00 7500.57
2000 1551.50 1144.00 827.00 639.50 230.00 90.00 32.00 27.50 200.50 489.80 a 1287.50 1883.50 8402.80
2001 1572.50 1669.50 1334.50 637.00 208.73 a 68.50 6.50 12.50 171.00 596.00 728.00 1406.00 8410.73
2002 1411.50 1053.00 1375.50 655.00 434.00 33.00 2.50 34.50 201.00 804.50 1009.00 1296.50 8310.00
2003 1559.00 667.50 o 1143.50 549.00 317.00 76.50 0.00 19.00 223.00 478.50 1233.33 c 1285.00 6883.83
2004 1719.50 1381.50 906.50 534.81 d 352.50 128.00 46.00 103.00 155.50 558.50 907.00 1313.00 8105.81
2005 1686.00 1158.00 1065.00 534.00 358.00 33.00 19.50 25.50 124.50 538.50 877.20 e 1501.43 a 7920.63
2006 1170.50 1235.50 1030.00 499.50 287.00 32.50 0.00 6.00 286.50 697.00 1029.00 1262.50 7536.00
2007 1664.00 1629.00 934.00 746.50 168.50 46.00 5.00 31.50 221.00 514.00 996.50 1671.00 8627.00
2008 1793.50 1597.50 1135.00 759.00 384.00 78.50 10.00 18.00 198.00 605.00 987.50 1767.00 9333.00
2009 1797.00 1388.00 1225.50 719.00 318.00 134.00 33.50 52.00 110.00 780.50 821.50 1676.00 9055.00
2010 1777.50 1569.50 999.50 454.50 319.50 26.00 0.00 7.00 194.00 501.00 1038.50 1617.50 8504.50
2011 1830.50 1546.50 1416.50 697.50 363.00 84.00 0.00 4.50 246.00 508.00 1033.50 1303.50 9033.50
2012 1378.00 1226.00 714.50 539.00 233.00 38.00 0.00 47.00 229.00 680.50 1020.00 1534.50 7639.50
2013 1579.50 1440.00 101.00 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 3019.50
Period of Record Statistics
MEAN 1655.34 1371.39 1092.26 596.17 276.59 71.60 12.19 27.73 196.70 541.00 1021.66 1479.64 8344.56
S.D. 231.70 215.23 185.09 109.86 85.15 40.88 13.67 23.00 66.46 114.21 151.56 193.29 610.26
SKEW 0.07 0.10 0.09 -0.04 0.09 0.48 2.13 0.94 0.50 0.10 0.68 0.36 0.18
MAX 2164.32 2133.00 1556.50 827.00 505.82 195.52 80.00 103.00 432.50 887.50 1584.00 2054.50 9905.58
MIN 1170.50 820.50 581.52 334.50 92.00 2.50 0.00 0.00 70.00 258.50 728.00 1118.50 6751.00
NO YRS 111 112 114 111 114 113 114 113 115 113 111 112 96