CLARK, SOUTH DAKOTA

Monthly Total Heating Degree Days

(391739)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201204
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 718.33 c 207.46 e 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 528.00 t 925.79
1894 1779.29 b 1478.30 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 n 5.00 156.50 579.50 1124.50 1209.00 6332.09
1895 0.00 z 1614.00 1096.00 319.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1128.50 1445.63 a 5603.13
1896 1594.43 a 1286.36 a 1433.00 613.00 214.50 25.00 h 34.00 51.50 276.00 0.00 z 0.00 z 0.00 z 5502.79
1897 0.00 z 0.00 z 0.00 z 276.50 p 248.50 h 0.00 z 0.00 z 9.50 y 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1898 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
1899 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
1900 1340.50 1525.00 1202.50 439.00 204.60 a 61.50 21.00 4.50 220.00 365.50 1147.00 1302.50 7833.60
1901 1436.50 1432.50 1049.00 618.60 e 160.00 h 91.50 0.50 7.00 283.50 455.50 1009.50 1619.00 8003.10
1902 1373.76 d 59.50 z 0.00 z 703.50 233.50 153.00 15.00 38.00 237.00 465.50 990.50 1644.00 5853.76
1903 1747.22 b 0.00 z 1165.50 0.00 z 0.00 z 48.50 31.50 69.00 298.00 442.50 1110.00 1645.00 6557.22
1904 1822.05 b 1728.00 1179.00 735.50 281.00 75.50 75.00 65.00 222.50 459.50 793.50 1479.50 8916.05
1905 1847.50 1565.50 856.50 649.00 406.50 101.00 26.50 6.50 120.50 671.50 847.50 1433.50 8532.00
1906 1507.00 1361.50 1383.50 524.00 369.50 184.50 23.00 47.50 140.50 582.50 1065.50 1469.00 8658.00
1907 1977.50 1391.70 a 1084.50 889.50 514.50 118.00 11.00 41.50 277.50 575.57 a 989.50 1311.50 9182.27
1908 1389.00 1432.50 1133.50 556.50 358.00 138.50 34.50 61.50 141.50 608.00 957.50 1473.00 8284.00
1909 1707.50 1408.00 1187.00 842.50 361.50 74.00 37.00 22.00 176.50 627.50 979.50 1823.50 9246.50
1910 1696.50 1639.00 620.00 483.50 415.00 122.00 12.50 45.00 135.50 h 406.00 1135.00 1492.50 8067.00
1911 1780.50 1356.50 913.50 672.00 221.13 a 28.00 45.50 78.50 189.11 b 699.05 a 1349.50 1439.00 8772.29
1912 2089.00 1499.00 1350.50 540.00 280.50 168.50 32.00 48.50 388.00 485.00 909.50 1342.50 9133.00
1913 1654.50 1495.50 1295.00 561.00 165.50 v 68.00 15.50 3.00 214.50 668.50 801.00 1193.50 7970.00
1914 1462.00 1635.50 1097.50 613.50 256.50 35.69 a 3.50 74.00 148.00 401.00 878.00 1711.00 8316.19
1915 1721.00 1216.44 a 1311.50 362.50 431.00 178.50 96.00 80.00 193.00 457.50 914.50 1383.50 8345.44
1916 1984.00 1591.00 1131.50 673.50 344.00 193.50 0.00 79.00 249.50 646.50 0.00 z 1825.38 a 8717.88
1917 1760.50 1690.37 a 1254.00 758.00 399.79 b 156.00 28.50 82.00 215.00 857.00 734.50 1791.50 9727.16
1918 1908.00 1400.50 822.00 720.00 255.00 74.00 28.00 19.00 292.50 428.00 945.00 1299.00 8191.00
1919 1350.00 1403.00 1179.50 642.50 324.00 91.50 0.00 28.00 167.00 818.00 0.00 z 0.00 z 6003.50
1920 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 122.50 18.00 44.00 148.50 364.50 1066.00 1378.00 3141.50
1921 1336.50 1086.50 977.50 548.00 303.50 36.50 12.00 42.00 185.00 508.00 1251.00 1383.00 7669.50
1922 1696.50 1730.00 1083.00 592.50 268.00 44.50 34.00 16.00 131.00 455.00 940.00 1541.50 8532.00
1923 1477.00 1536.50 1271.00 695.00 304.00 60.00 5.00 63.00 154.00 628.50 839.00 1216.50 8249.50
1924 1855.00 1286.00 1212.00 678.50 540.50 168.00 52.50 60.00 281.00 385.00 1038.00 1720.50 a 9277.00
1925 1586.50 1214.00 919.50 324.00 396.50 111.00 35.00 5.00 145.50 977.00 1027.00 1485.50 8226.50
1926 1568.00 1135.00 1161.50 650.00 177.50 142.00 11.00 20.50 297.00 577.50 0.00 z 0.00 z 5740.00
1927 0.00 z 0.00 z 0.00 z 0.00 z 437.00 154.50 25.00 83.50 200.36 b 451.00 1198.00 1945.50 4494.86
1928 1546.50 1287.50 979.50 817.50 202.00 115.00 5.50 35.00 242.50 566.50 936.50 1239.50 7973.50
1929 1995.50 1651.50 969.27 a 606.72 a 396.50 109.00 4.00 6.50 322.00 517.00 1159.50 1493.00 9230.49
1930 1921.00 1033.00 1088.50 528.50 356.00 96.72 a 14.00 9.50 201.00 643.00 954.00 1296.00 8141.22
1931 1260.67 a 951.00 1025.50 545.50 408.50 33.00 11.00 31.00 109.50 418.00 963.50 1322.50 7079.67
1932 1639.90 a 1355.00 1362.00 568.00 255.50 12.50 20.00 15.50 183.50 665.00 1079.50 1608.50 8764.90
1933 1365.50 1429.50 1061.00 656.00 316.00 15.50 0.00 16.50 87.00 602.00 1005.50 1530.00 8084.50
1934 1410.50 1238.00 1133.50 609.00 103.50 36.50 12.00 53.50 294.00 382.50 878.00 1529.50 7680.50
1935 1719.50 1089.50 1009.00 791.00 456.00 130.00 0.00 73.00 166.50 659.78 a 1223.50 1546.90 a 8864.68
1936 2092.50 2115.00 1104.00 788.50 181.50 84.00 0.00 13.00 135.00 636.53 a 1139.50 1474.50 9764.03
1937 2108.50 1532.50 1158.00 719.00 237.50 133.45 a 4.00 4.50 184.50 591.00 1095.50 1589.50 9357.95
1938 1663.00 1452.50 951.00 601.50 377.50 64.00 0.00 1.50 100.00 314.50 1122.00 1360.50 8008.00
1939 1406.00 1672.74 a 1073.00 534.50 113.67 a 65.00 0.00 23.25 a 185.50 574.00 835.50 1113.50 7596.66
1940 1887.50 1385.50 1226.00 703.00 272.80 a 49.50 8.50 48.50 126.00 338.00 1180.50 1279.50 8505.30
1941 1578.50 1439.00 1150.00 499.00 151.50 130.00 32.00 24.28 a 197.00 515.50 912.50 1218.00 7847.28
1942 1386.50 1281.00 987.00 448.00 399.00 87.50 19.00 21.00 312.50 529.50 978.00 1589.50 8038.50
1943 1903.50 1274.50 1310.00 546.00 397.50 38.00 g 2.50 17.00 247.00 469.50 1081.50 1286.50 8535.50
1944 1202.50 1402.00 1312.50 724.50 187.00 84.50 7.50 49.60 a 170.00 453.12 a 973.50 1413.00 7979.72
1945 1551.00 1301.00 821.50 685.00 402.00 209.50 42.50 18.00 271.50 537.00 1057.50 1680.50 8577.00
1946 1584.50 1364.50 811.50 413.50 378.72 a 118.45 a 10.50 53.00 183.00 554.50 1091.00 1344.50 7907.67
1947 0.00 z 0.00 z 0.00 z 699.50 228.00 i 132.50 21.50 15.00 215.00 322.29 b 1247.00 1067.50 j 2652.79
1948 1709.00 1552.50 1266.87 a 545.50 313.00 102.93 a 9.50 45.00 120.00 b 552.50 1030.50 1478.70 a 8726.00
1949 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 17.16 c 25.50 p 258.50 542.50 765.00 a 1470.50 3053.66
1950 1947.00 1319.50 1272.50 869.50 408.68 a 70.50 21.50 59.50 142.00 460.00 1145.00 1586.50 9302.18
1951 1743.50 1214.50 1435.50 730.50 222.17 a 185.50 31.50 36.50 318.62 a 624.00 1168.00 1707.50 9417.79
1952 1745.50 989.50 f 1347.00 561.00 258.00 35.00 6.00 15.50 135.00 628.50 963.50 1343.33 a 7038.33
1953 1535.00 1285.00 1070.00 766.50 325.00 64.00 19.00 8.00 180.00 337.00 854.50 1423.50 7867.50
1954 1825.50 889.50 1190.00 579.00 405.50 80.50 1.00 4.00 173.79 a 618.50 802.00 1312.50 7881.79
1955 1551.07 b 1508.00 1195.00 334.50 133.50 81.50 0.00 10.00 198.50 476.76 b 1344.00 1753.50 8586.33
1956 1752.00 1578.50 1254.00 775.00 269.50 13.50 12.50 34.50 232.00 353.00 1036.03 a 1303.50 8614.03
1957 1839.50 1304.50 1115.50 636.50 351.00 78.50 0.00 24.00 245.00 575.50 995.00 1215.50 8380.50
1958 1353.50 1401.50 1109.00 595.50 175.50 163.50 31.00 23.50 133.50 445.37 a 992.00 1546.26 b 7970.13
1959 1772.50 1503.19 a 960.50 577.00 296.50 40.50 5.00 0.00 207.50 715.00 1277.00 1197.50 8552.19
1960 1644.00 1496.00 1507.00 641.00 269.00 72.50 8.00 10.50 209.00 493.00 955.50 1524.50 8830.00
1961 1644.00 1205.00 898.50 753.50 369.50 43.00 9.50 3.50 308.57 b 494.00 1015.00 1615.50 8359.57
1962 1722.05 a 1463.50 907.50 g 638.50 218.03 a 67.78 c 23.50 8.78 a 225.00 357.00 g 867.69 d 1116.00 f 5234.84
1963 1883.00 1375.00 923.50 565.00 310.50 37.76 a 0.00 23.50 93.00 248.00 897.50 1767.00 c 8123.76
1964 1479.22 a 0.00 z 1339.50 586.50 0.00 z 0.00 z 5.50 79.00 218.50 483.00 1049.00 1663.00 6903.22
1965 1764.50 1423.50 1441.50 655.00 236.50 44.50 5.00 24.00 465.50 443.50 995.50 1205.50 8704.50
1966 1920.00 1437.00 920.00 780.50 361.00 76.00 0.00 77.00 206.00 522.00 1117.50 1404.50 8821.50
1967 1499.00 1474.00 990.00 618.50 418.00 74.50 49.50 33.00 143.00 559.00 1025.00 1434.00 8317.50
1968 1604.00 1442.00 821.50 597.50 402.50 72.00 29.50 41.50 184.50 512.50 996.00 1593.50 8297.00
1969 1863.50 1300.00 1433.00 539.50 244.50 170.00 8.50 6.20 a 122.50 707.50 945.50 1383.50 8724.20
1970 1883.50 1306.00 1247.00 696.00 234.50 35.00 8.50 5.50 209.50 550.00 1068.00 1560.50 8804.00
1971 1850.00 1377.50 1101.00 531.00 305.50 28.50 36.68 a 20.00 211.50 500.50 1014.50 1558.50 8535.18
1972 1821.00 1579.50 1156.00 677.00 251.00 59.50 26.00 50.50 193.00 629.50 1084.00 1678.00 9205.00
1973 1504.00 1214.50 851.50 629.00 259.00 31.50 3.00 0.50 208.50 361.50 0.00 z 1530.88 a 6593.88
1974 1652.00 1271.50 1043.50 538.50 336.50 70.00 0.00 38.50 213.00 437.00 985.00 1333.50 7919.00
1975 1531.50 1433.00 1284.50 822.50 216.50 72.50 11.50 13.50 247.00 446.50 943.50 1424.50 8447.00
1976 1618.00 1081.00 1044.00 460.50 258.00 25.00 1.60 b 4.00 149.00 676.00 1167.50 1562.50 8047.10
1977 1962.50 1148.50 987.35 a 395.50 55.50 14.50 2.50 36.00 142.50 532.50 1123.00 1653.50 8053.85
1978 2018.50 1604.50 1155.50 638.00 224.50 60.50 12.00 11.00 126.50 501.50 1113.00 1604.50 9070.00
1979 2016.00 1655.50 1213.50 738.00 398.50 58.00 6.50 34.50 99.50 523.38 a 1069.50 1188.50 9001.38
1980 1560.33 a 1426.18 a 1181.50 480.00 181.50 28.00 4.00 14.50 156.00 573.50 854.00 1418.50 7878.01
1981 1385.38 b 1170.00 848.00 405.00 279.00 46.50 10.16 b 4.00 117.00 535.00 831.50 1555.50 7187.03
1982 2031.50 1378.50 1139.00 674.50 209.50 141.50 0.00 38.50 201.00 551.50 1101.50 1274.00 8741.00
1983 1358.50 1054.50 1043.00 764.00 331.50 78.50 4.00 0.00 203.50 491.00 1004.48 a 2015.00 8347.98
1984 1545.50 1054.00 1251.50 607.00 299.50 36.50 4.00 7.50 299.00 533.50 961.55 a 1607.50 8207.05
1985 1744.00 1383.00 948.00 460.00 135.50 134.50 7.00 66.00 293.50 560.58 a 1403.50 1789.00 8924.58
1986 1438.50 1457.00 953.00 569.50 263.50 38.00 3.50 67.00 251.50 560.00 1188.50 1274.00 8064.00
1987 1394.50 973.50 1034.50 434.50 159.00 30.00 5.00 77.00 165.00 691.50 904.50 1305.50 7174.50
1988 1805.00 1581.00 1061.00 628.00 156.50 7.50 6.00 32.00 197.50 693.50 1063.50 1414.00 8645.50
1989 1410.00 1715.50 1297.50 626.00 282.00 125.50 2.00 18.00 231.00 546.50 1128.00 1803.50 9185.50
1990 1264.00 1278.50 993.50 669.00 352.00 73.50 26.50 28.50 160.50 638.00 927.50 1646.50 8058.00
1991 1726.00 1100.50 1036.50 547.50 264.00 21.00 20.00 13.50 251.00 668.50 1269.50 1306.00 8224.00
1992 1356.50 1122.00 949.00 746.00 254.50 113.00 98.50 111.00 253.50 588.00 1140.50 1589.00 8321.50
1993 1726.50 1520.50 1228.00 706.00 320.00 159.50 22.50 42.50 358.00 669.50 1173.00 1476.00 9402.00
1994 1994.00 1640.00 1061.50 650.50 219.00 47.00 30.50 56.00 176.50 513.50 954.00 1364.00 8706.50
1995 1622.50 1319.50 1124.50 825.50 388.00 66.50 21.50 9.00 258.00 659.50 1223.50 1471.00 8989.00
1996 1856.50 1430.50 1386.50 771.50 412.50 65.00 14.00 1.00 254.00 606.50 1376.50 1759.00 9933.50
1997 1891.00 1393.00 1254.98 a 805.50 405.50 15.00 32.50 41.00 136.50 530.50 1165.00 1237.50 8907.98
1998 1552.00 1028.00 1279.50 570.50 177.50 131.00 4.00 1.00 77.50 530.00 965.00 1300.50 7616.50
1999 1713.50 1103.50 1009.00 634.29 b 251.00 74.50 5.50 17.00 265.50 625.00 729.00 1248.00 7675.79
2000 1537.50 1120.50 836.50 649.00 238.00 101.00 34.00 15.50 0.00 z 468.00 1242.00 1879.63 a 8121.63
2001 1513.50 1623.50 1344.00 671.50 232.50 74.00 9.82 a 3.00 193.00 601.50 699.50 1341.50 8307.32
2002 1425.00 1089.00 1459.50 688.00 457.50 46.00 1.00 27.00 186.00 822.50 1037.50 1338.50 8577.50
2003 1612.50 1494.00 1182.50 583.00 337.50 97.00 0.00 12.50 229.50 488.50 1189.50 1325.50 8552.00
2004 1718.50 1397.00 927.00 592.00 364.00 130.00 35.00 91.50 154.00 583.50 887.00 1337.50 8217.00
2005 1674.00 1153.50 1101.00 538.50 370.00 29.50 17.50 21.50 110.00 540.00 952.00 1169.00 f 6507.50
2006 1212.00 1331.50 1062.50 508.00 282.00 35.00 0.00 7.50 323.00 694.50 1011.00 1263.00 7730.00
2007 1594.50 1610.00 974.50 742.00 200.00 50.50 4.00 34.00 203.50 485.00 1007.00 1599.50 8504.50
2008 1717.00 1551.50 1183.50 770.50 402.00 92.50 9.50 17.00 189.00 601.50 1011.00 1754.50 9299.50
2009 1831.50 1372.50 1220.00 740.00 340.00 140.50 33.00 53.00 113.50 806.50 788.00 1680.50 9119.00
2010 1731.00 1529.50 995.00 448.00 343.00 41.50 0.00 7.00 230.00 485.50 1025.50 1637.00 8473.00
2011 1832.50 1498.00 1363.00 736.00 402.50 104.00 1.00 3.21 b 233.00 471.50 975.00 1266.50 8886.21
2012 1393.00 1253.50 724.50 529.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3900.00
Period of Record Statistics
MEAN 1662.10 1383.25 1118.62 623.66 298.46 83.58 16.33 31.31 204.22 545.53 1027.98 1479.09 8482.89
S.D. 215.33 201.81 175.33 120.81 93.98 47.95 17.92 25.56 67.93 119.68 142.71 189.89 579.28
SKEW -0.03 0.09 -0.11 -0.29 -0.03 0.57 2.10 0.80 0.73 0.48 0.18 0.42 0.06
MAX 2108.50 2115.00 1507.00 889.50 540.50 209.50 98.50 111.00 465.50 977.00 1403.50 2015.00 9933.50
MIN 1202.50 889.50 620.00 319.00 55.50 7.50 0.00 0.00 77.50 248.00 699.50 1113.50 7079.67
NO YRS 111 108 109 112 107 109 113 113 112 112 110 109 93