STEPHAN 2 NW, SOUTH DAKOTA

Monthly Total Heating Degree Days

(397992)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201302
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
1903 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 203.50 g 445.00 1062.93 a 1534.00 3041.93
1904 1704.50 1626.50 1089.00 689.00 247.50 77.00 15.00 17.50 138.89 c 372.00 a 807.50 1448.00 8232.39
1905 1770.50 1547.00 804.50 626.00 398.50 35.50 r 11.00 0.52 a 79.00 654.50 833.50 1299.50 8024.52
1906 1399.00 1229.50 1340.00 466.00 283.00 100.00 24.69 d 39.00 137.50 527.00 1024.00 1405.50 7975.19
1907 1881.00 1229.41 a 892.50 813.10 a 512.00 93.50 2.00 j 27.90 a 226.55 a 549.00 912.50 1216.48 b 8353.95
1908 1280.50 1254.50 1069.00 488.00 349.50 123.00 39.50 69.50 104.00 554.00 943.00 1427.50 7702.00
1909 1622.50 1328.00 1067.50 762.41 a 325.00 48.50 13.50 10.50 139.50 537.50 990.50 1771.50 8616.91
1910 1659.50 1616.00 606.00 448.00 400.00 102.50 2.50 37.00 170.00 382.00 0.00 z 1483.50 6907.00
1911 1611.50 1338.00 826.00 625.50 218.03 a 11.50 15.00 73.50 185.50 644.00 1222.76 a 1463.50 8234.79
1912 1968.50 1306.50 1303.50 510.50 235.50 133.00 11.62 c 16.00 353.00 501.50 865.50 1199.50 8404.62
1913 1458.55 a 1395.33 a 1280.50 529.50 393.18 a 36.00 2.00 0.00 a 177.50 651.00 805.50 1223.00 7952.07
1914 1271.50 1563.00 1083.50 562.50 259.00 42.50 1.00 53.50 90.50 436.50 833.00 1638.50 7835.00
1915 1637.50 1222.00 1413.50 373.00 413.00 136.50 48.00 70.50 221.50 420.50 897.00 1293.00 8146.00
1916 1938.50 1450.50 1004.00 643.00 355.00 162.00 0.00 13.00 l 240.00 591.58 a 654.50 j 1729.50 8114.08
1917 1697.00 1612.50 1217.00 709.50 395.00 138.50 14.50 47.50 158.00 779.00 701.00 1628.03 b 9097.53
1918 1846.50 1317.00 776.50 692.00 140.50 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4632.00
1919 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
1920 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
1921 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
1922 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
1923 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
1924 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
1925 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
1926 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
1927 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
1928 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
1929 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
1930 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
1931 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
1932 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
1933 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
1934 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
1935 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
1936 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
1937 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
1938 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
1939 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
1940 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
1941 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
1942 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
1943 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
1944 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
1945 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
1946 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
1947 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
1948 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
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1950 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
1951 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
1952 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
1953 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
1954 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
1955 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
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1957 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
1958 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
1959 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 20.56 c 5.50 10.16 b 222.22 c 678.42 e 1193.89 c 1132.53 a 3263.28
1960 1590.96 c 1535.33 c 1524.74 d 606.96 b 319.96 c 80.00 9.00 8.55 b 190.00 466.55 a 767.50 f 1531.73 c 7863.79
1961 1576.57 c 1194.85 b 903.50 570.00 i 362.70 a 64.00 5.34 b 2.07 a 291.21 a 484.50 972.60 e 1520.00 7377.34
1962 1679.74 d 1379.00 1342.30 a 474.00 g 199.50 86.00 26.50 14.31 e 162.00 i 489.80 a 849.50 1318.00 7384.65
1963 1791.00 1178.15 b 877.00 576.50 302.50 15.00 0.00 10.50 89.50 0.00 z 0.00 z 1586.88 b 6427.03
1964 1369.50 1147.50 1248.78 a 515.00 215.50 66.00 6.50 88.50 215.40 e 536.00 1044.50 1664.00 8117.18
1965 1716.50 1307.50 1416.00 621.50 254.00 48.50 0.50 22.00 460.86 a 406.00 964.50 1118.07 a 8335.93
1966 1839.50 1444.00 859.45 b 754.00 334.28 a 82.00 0.00 69.00 214.50 561.50 1064.46 b 1402.75 a 8625.45
1967 1440.50 1362.00 1077.00 604.00 473.00 72.00 46.00 30.50 114.50 532.50 954.50 1395.55 c 8102.05
1968 1597.53 a 1352.00 807.50 612.50 414.50 0.00 z 14.47 a 21.50 186.21 a 0.00 z 982.76 a 1589.50 7578.47
1969 1793.50 1267.50 1365.50 475.00 196.50 159.00 0.00 4.13 a 88.50 769.63 e 902.00 1359.00 8380.27
1970 1788.18 a 1186.00 1220.00 662.00 199.50 44.48 a 17.00 1.03 a 214.50 590.00 1062.50 1570.00 8555.20
1971 1773.50 1344.00 1077.50 518.50 325.00 14.00 27.00 4.50 189.50 478.50 987.93 a 1534.50 8274.43
1972 1733.00 1503.50 1065.00 610.00 0.00 z 43.50 22.50 22.00 153.00 602.00 0.00 z 1591.00 7345.50
1973 1459.00 0.00 z 0.00 z 611.00 276.00 24.00 0.00 0.00 a 209.00 369.50 0.00 z 1470.43 a 4418.93
1974 1489.50 1131.50 954.00 510.50 317.75 a 74.50 0.00 38.00 201.00 383.00 940.00 1244.98 c 7284.73
1975 1433.23 a 1407.00 1213.50 724.00 212.00 63.50 4.50 0.00 208.00 437.50 953.00 1329.50 7985.73
1976 1477.67 a 981.50 1012.00 441.50 256.00 22.00 0.50 0.00 142.50 661.50 1162.50 b 1473.00 7630.67
1977 1833.00 1068.50 960.50 380.50 71.50 6.00 0.00 a 28.42 a 142.50 520.50 1055.00 1530.50 7596.92
1978 2014.00 1605.50 1118.00 625.50 267.78 b 75.00 4.00 17.64 b 94.50 499.00 1091.50 1548.00 8960.41
1979 1946.50 1609.50 1064.00 645.50 370.00 50.69 a 10.00 25.50 67.00 384.00 h 1100.89 b 1111.00 8000.58
1980 1557.50 1323.00 1094.00 514.29 b 196.16 b 25.00 1.00 12.18 c 132.41 a 597.02 b 862.76 a 1350.50 7665.81
1981 1271.55 c 1116.00 864.79 b 407.07 a 336.57 c 42.32 b 10.16 b 10.50 99.11 b 555.42 a 762.12 d 1480.00 6955.60
1982 1994.50 1344.00 1126.00 704.00 235.50 129.00 0.00 34.00 235.00 573.50 1103.50 1280.50 8759.50
1983 1278.50 999.00 1037.50 762.00 442.00 99.50 3.00 0.00 217.50 524.00 1013.00 1995.00 8371.00
1984 1446.50 1029.00 1147.50 624.50 306.50 52.00 1.50 6.00 301.00 570.50 972.50 1589.50 8047.00
1985 1693.50 1418.50 982.50 465.50 143.00 183.00 21.00 107.00 291.50 557.50 1410.52 a 1605.50 8879.02
1986 1367.50 1412.50 775.53 b 609.50 228.50 29.50 0.00 53.00 242.00 477.00 1091.00 1178.50 7464.53
1987 1214.00 907.00 995.50 401.50 108.50 18.00 6.00 60.00 134.00 609.50 804.50 1251.50 6510.00
1988 1707.00 1383.00 907.50 541.00 160.00 4.50 6.00 23.00 135.00 572.00 927.50 1339.50 7706.00
1989 1364.50 1577.00 1164.50 525.00 232.00 61.50 0.00 2.50 174.00 474.50 985.00 1664.00 8224.50
1990 1121.50 1116.50 881.50 589.00 309.00 44.50 4.00 2.50 108.00 502.00 847.00 1560.50 7086.00
1991 1595.00 980.50 909.50 514.00 226.50 5.00 1.50 0.00 166.50 581.50 1145.00 1183.50 7308.50
1992 1203.00 1016.00 852.00 633.50 200.00 56.00 54.00 68.00 160.50 517.50 1069.00 1435.50 7265.00
1993 1560.00 1403.50 974.00 631.50 267.00 92.50 14.50 36.50 254.00 576.50 1110.50 1335.50 8256.00
1994 1778.00 1516.00 875.50 576.50 164.00 26.00 11.50 25.00 122.50 443.50 924.00 1370.00 7832.50
1995 1494.00 1091.00 1053.50 798.50 349.50 74.00 5.00 4.50 192.50 545.50 1028.50 1309.50 7946.00
1996 1698.50 1240.50 1267.00 624.00 352.50 52.00 4.50 0.00 193.50 533.00 1284.50 1751.00 9001.00
1997 1753.00 1252.00 1059.00 749.00 334.50 15.00 20.00 13.00 124.50 467.00 1054.50 1141.50 7983.00
1998 1451.50 899.00 1204.00 504.00 189.00 120.00 0.00 2.00 49.00 492.00 877.00 1219.50 7007.00
1999 1474.50 888.50 876.00 582.00 267.50 60.00 7.23 a 3.50 0.00 z 0.00 z 733.39 b 1178.52 a 6071.14
2000 1404.50 1062.00 814.50 620.00 229.00 116.50 15.00 7.50 171.50 494.00 1256.00 1769.58 a 7960.08
2001 1448.50 1545.00 1218.00 629.00 245.50 99.50 12.00 9.00 162.50 568.50 730.50 1321.50 7989.50
2002 1350.50 1008.50 1357.50 608.50 418.50 36.00 4.50 35.50 207.00 807.50 953.00 1243.00 8030.00
2003 1525.00 1350.00 1059.00 523.50 320.50 95.50 4.50 15.50 208.50 277.50 f 1165.50 1214.50 7482.00
2004 1598.00 1294.50 849.00 554.50 311.00 147.00 29.50 75.50 154.50 546.50 888.50 1258.00 7706.50
2005 1560.16 b 1044.50 976.00 524.50 385.50 51.00 11.50 13.00 107.50 524.00 899.00 1460.32 c 7556.98
2006 1079.00 1219.00 1065.00 344.50 g 275.50 25.50 4.00 9.00 279.00 684.50 1000.00 1243.00 6883.50
2007 1478.70 a 1464.00 823.00 700.00 198.00 54.50 3.00 18.50 178.00 492.50 950.50 1473.50 7834.20
2008 1564.98 a 0.00 z 1064.00 719.00 388.50 0.00 z 8.50 4.50 183.00 586.00 975.00 1661.00 7154.48
2009 1625.00 1198.00 1116.50 716.00 344.00 131.50 37.00 42.00 120.00 828.00 814.00 316.50 x 6972.00
2010 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
2011 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
2012 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
2013 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
Period of Record Statistics
MEAN 1580.74 1287.91 1051.08 593.29 290.74 68.73 10.91 24.60 178.09 544.47 980.31 1425.32 7987.04
S.D. 217.13 200.36 189.34 104.12 90.00 44.36 12.68 25.51 71.28 100.14 142.76 190.88 558.85
SKEW -0.09 -0.14 0.28 -0.04 0.05 0.59 1.66 1.24 1.14 0.76 0.47 0.42 -0.24
MAX 2014.00 1626.50 1524.74 813.10 512.00 183.00 54.00 107.00 460.86 828.00 1410.52 1995.00 9097.53
MIN 1079.00 888.50 606.00 373.00 71.50 4.50 0.00 0.00 49.00 369.50 701.00 1111.00 6510.00
NO YRS 65 63 64 62 63 62 64 64 63 61 60 65 47