SUMMIT 1 W, SOUTH DAKOTA

Monthly Total Heating Degree Days

(398116)

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
1956 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 271.00 359.50 1082.00 1374.00 3086.50
1957 1888.42 a 1377.00 1175.50 699.50 389.50 130.86 a 0.00 57.00 306.50 624.00 1055.50 1302.50 9006.28
1958 1442.00 1474.00 1181.50 659.50 241.50 219.00 63.50 42.50 191.00 501.00 1060.00 1672.00 8747.50
1959 1856.26 b 1575.78 a 1059.50 667.50 360.00 63.00 22.50 14.50 232.50 794.00 1349.00 1227.50 9222.04
1960 1023.00 m 1556.50 1602.50 728.50 325.50 136.03 a 29.50 27.50 229.00 556.00 1019.00 1595.50 7805.53
1961 1706.55 a 1268.00 985.00 844.50 415.50 67.50 19.50 8.00 325.50 547.50 1060.50 1687.50 8935.55
1962 1843.00 1562.00 1316.00 748.50 300.50 107.00 55.50 28.50 299.50 492.00 922.00 1448.00 9122.50
1963 1967.00 1430.00 971.50 605.50 347.00 58.00 11.00 46.00 147.50 304.00 924.50 1748.50 8560.50
1964 1483.00 1297.00 1377.00 637.50 243.00 124.00 11.50 103.50 288.00 557.00 1097.50 1774.50 8993.50
1965 1882.00 1530.00 1541.50 733.50 292.50 74.00 17.00 54.00 514.50 478.50 1046.50 1283.00 9447.00
1966 2023.00 1533.00 993.50 850.00 413.50 102.50 0.00 101.00 139.50 f 493.50 f 1194.50 1509.50 8720.50
1967 1608.00 1598.50 1067.00 671.00 488.25 c 92.59 a 52.00 59.00 166.00 607.00 1078.50 1490.50 8978.34
1968 1681.00 1543.00 872.00 644.00 420.00 89.50 37.50 55.50 202.00 572.50 1049.50 1668.00 8834.50
1969 1975.50 1397.00 1497.00 596.50 296.50 217.50 24.50 6.50 167.50 751.50 1008.00 1470.00 9408.00
1970 1948.50 1408.50 1351.00 757.50 303.50 56.00 10.50 18.00 238.00 609.50 1177.50 1634.50 9513.00
1971 1931.50 1445.50 1138.50 586.00 369.50 41.00 62.00 30.00 242.50 556.00 1082.00 1629.50 9114.00
1972 1888.00 1659.50 1257.00 740.50 280.50 78.50 34.50 53.50 261.00 697.50 1140.50 1777.50 9868.50
1973 1582.50 1287.00 919.00 691.00 335.50 71.00 25.50 7.50 268.00 402.50 1119.50 1625.50 8334.50
1974 1790.50 1408.50 1207.50 641.00 426.50 99.50 8.50 74.50 303.50 499.50 1048.50 1387.25 a 8895.25
1975 1619.50 1545.50 1405.00 959.50 284.50 114.00 24.50 33.50 294.00 518.50 1019.00 1537.00 9354.50
1976 1738.00 1229.50 1176.00 520.50 332.50 53.50 11.50 18.50 218.00 740.00 1273.00 1699.50 9010.50
1977 2058.00 1271.00 1042.50 459.50 97.50 54.00 15.50 101.50 225.50 589.50 1193.50 1745.50 8853.50
1978 2074.00 1673.00 1273.00 725.00 272.00 109.00 38.50 40.50 169.50 562.00 1207.00 1706.00 9849.50
1979 2097.00 1749.50 1336.50 887.59 a 478.50 102.50 22.50 68.00 165.50 646.00 1115.50 1212.00 9881.09
1980 1644.00 1508.00 1302.00 548.50 223.50 63.00 18.00 53.00 241.50 672.00 0.00 z 1536.05 a 7809.55
1981 1495.50 1233.50 929.50 468.50 316.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4443.50
1982 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5.50 71.00 285.00 588.47 b 724.00 l 1347.50 2297.47
1983 1440.00 1171.00 1195.00 865.00 426.50 136.00 11.00 0.00 271.50 643.50 1129.50 2175.00 9464.00
1984 1712.00 1211.50 832.50 i 659.50 364.00 57.00 26.00 18.00 360.50 592.50 1037.50 1657.47 a 7695.97
1985 1815.00 1444.00 968.75 a 471.50 184.50 159.00 20.00 112.50 334.00 643.00 1471.50 1946.00 9569.75
1986 1570.50 1542.50 1102.50 666.21 a 310.00 79.00 7.50 84.50 285.00 572.50 1187.50 1272.00 8679.71
1987 1384.50 989.00 1052.00 440.00 178.50 45.50 20.50 79.00 183.50 729.00 943.50 1346.00 7391.00
1988 1812.50 1575.50 1103.00 595.50 146.50 9.00 9.50 42.00 215.50 702.50 1110.00 1474.50 8796.00
1989 1504.00 1730.00 1318.00 703.00 306.50 141.50 0.00 19.50 222.00 578.00 1197.00 1804.00 9523.50
1990 1277.00 1284.00 987.00 676.50 378.50 93.50 41.50 39.00 169.00 613.00 954.00 1645.50 8158.50
1991 1736.50 1149.00 1062.50 557.00 254.50 25.00 33.00 27.00 264.50 662.00 1264.00 1345.00 8380.00
1992 1404.50 1146.00 989.50 748.50 276.00 149.50 133.50 137.00 245.00 636.50 1218.50 1662.00 8746.50
1993 1773.00 1565.50 1286.50 773.50 354.50 177.00 49.00 58.50 357.50 642.50 1210.50 1529.50 9777.50
1994 2106.50 1676.00 1117.50 669.50 246.50 53.00 30.50 80.00 178.00 525.50 959.00 1388.00 9030.00
1995 1637.00 1388.00 1156.00 867.50 417.00 91.00 19.50 8.00 257.00 694.50 1240.00 1553.00 9328.50
1996 1931.00 1503.00 1436.00 808.00 448.00 89.50 36.50 15.00 282.00 566.50 1403.50 1839.50 10358.50
1997 1909.00 1401.50 1321.00 879.50 429.00 23.50 55.00 72.50 153.50 529.00 1234.00 1351.00 9358.50
1998 1603.50 1056.50 1291.00 582.00 186.00 152.00 12.50 6.00 96.00 531.00 1013.00 1342.50 7872.00
1999 1760.00 1100.00 1021.00 603.00 291.50 95.50 8.94 e 26.50 269.00 621.03 a 775.00 1284.00 7855.48
2000 1619.00 1147.50 868.00 679.00 276.00 133.00 45.50 25.50 193.00 487.50 1224.50 1935.00 8633.50
2001 1537.00 1674.50 1338.50 671.00 286.50 110.00 16.50 17.50 204.00 601.00 733.50 1367.50 8557.50
2002 1443.00 1085.50 1455.00 706.00 450.00 59.50 12.50 35.50 171.00 863.50 1045.00 1376.00 8702.50
2003 1691.50 1516.50 1183.00 584.00 373.50 119.00 6.50 22.50 238.50 496.50 1184.00 1342.50 8758.00
2004 1757.00 1373.00 953.00 600.00 377.00 166.50 64.50 116.00 132.00 550.00 925.50 1363.50 8378.00
2005 1696.00 1177.50 1077.00 544.50 391.00 41.50 17.00 45.00 121.00 556.00 981.00 1538.00 8185.50
2006 1283.50 1447.00 1126.00 491.50 320.00 58.50 6.50 7.00 317.00 708.50 1006.00 1255.00 8026.50
2007 1590.50 1606.50 1010.50 775.00 202.50 56.50 13.50 42.50 186.50 492.50 1030.00 1605.50 8612.00
2008 1709.50 1524.50 1208.00 784.50 362.00 128.50 11.00 11.50 166.00 584.00 1006.50 1742.00 9238.00
2009 1837.00 1375.50 1189.50 668.00 323.50 133.50 45.00 57.50 95.00 793.00 773.00 1685.00 8975.50
2010 1725.00 1469.00 945.50 418.00 332.00 45.50 1.50 13.50 228.00 483.00 1019.00 1680.50 8360.50
2011 1845.50 1516.00 1339.50 741.50 340.00 77.00 1.00 7.50 217.00 468.50 970.00 1247.00 8770.50
2012 1387.00 1210.50 657.00 499.50 217.50 42.00 0.00 37.50 197.00 621.00 969.00 1489.50 7327.50
2013 1651.50 1413.00 423.50 v 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 3064.50
Period of Record Statistics
MEAN 1715.86 1411.26 1161.75 669.08 321.88 93.91 25.03 44.31 233.85 589.34 1084.04 1541.62 8894.90
S.D. 208.80 185.30 191.26 123.97 85.31 46.59 23.14 32.72 73.71 104.92 144.73 208.29 626.16
SKEW -0.11 -0.33 0.05 0.05 -0.30 0.65 2.13 0.86 0.87 0.04 0.10 0.50 -0.28
MAX 2106.50 1749.50 1602.50 959.50 488.25 219.00 133.50 137.00 514.50 863.50 1471.50 2175.00 10358.50
MIN 1277.00 989.00 657.00 418.00 97.50 9.00 0.00 0.00 95.00 304.00 733.50 1212.00 7327.50
NO YRS 55 56 54 55 55 54 55 55 55 55 54 56 50