WATERTOWN RGNL AP, SOUTH DAKOTA

Monthly Total Heating Degree Days

(398932)

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 1845.50 1646.50 1387.50 775.00 319.09 b 22.00 r 0.00 z 0.00 z 0.00 z 53.00 z 1085.00 1614.00 8672.59
1894 1831.50 1461.00 977.00 535.34 a 302.00 21.43 b 0.00 z 0.00 z 0.00 z 0.00 z 630.50 o 1243.00 6371.27
1895 1820.45 b 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 1820.45
1896 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
1897 0.00 z 0.00 z 1405.69 b 656.00 335.50 200.17 a 20.50 99.50 113.50 549.50 1199.00 1575.50 6154.86
1898 1430.00 1308.50 1129.00 640.00 358.00 86.50 26.50 57.00 210.00 755.00 1194.50 1612.00 8807.00
1899 1638.00 1711.50 1556.50 709.50 370.00 102.50 54.00 15.50 368.00 597.00 777.00 1523.50 9423.00
1900 1445.00 1644.00 1204.00 474.50 239.00 64.50 30.00 4.00 259.50 349.00 1164.00 1298.26 b 8175.76
1901 1515.38 a 1481.50 1137.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4133.88
1902 1576.83 e 1391.92 b 0.00 z 685.50 265.05 a 170.17 a 22.50 43.00 h 142.00 n 544.57 a 1048.93 b 1711.72 a 7417.19
1903 1641.00 1586.00 1125.50 634.66 a 297.50 119.00 52.04 c 91.45 a 316.55 a 542.50 b 1092.41 a 1650.23 a 9148.84
1904 1853.50 1765.50 1213.98 c 746.38 a 359.50 132.00 69.23 a 94.55 a 237.86 b 509.50 890.50 1501.00 9373.50
1905 1850.04 c 1561.50 911.50 672.00 451.50 125.19 d 57.00 13.50 132.00 713.00 945.54 b 1380.00 8812.76
1906 1138.00 g 1368.37 a 1372.78 a 546.72 a 333.00 140.50 58.00 56.50 170.50 654.50 1109.50 1489.00 7299.38
1907 1946.80 a 1383.00 1082.42 a 904.44 c 623.74 b 64.00 i 47.05 c 71.41 c 332.00 485.50 h 1004.50 1329.50 8724.87
1908 1416.50 1422.61 b 1136.15 a 600.54 b 345.00 168.33 c 36.00 f 76.43 b 124.50 591.50 901.50 1406.00 8189.06
1909 1655.50 1341.50 1137.18 a 843.00 325.00 73.50 20.50 15.00 f 170.00 615.57 c 970.50 1737.50 8889.75
1910 1621.00 1568.50 620.50 482.50 396.00 119.50 2.50 42.50 193.50 407.50 0.00 z 1456.50 6910.50
1911 1771.50 1325.00 730.50 f 662.00 209.50 33.62 a 58.00 98.00 225.00 694.00 1394.00 1437.50 7908.12
1912 2121.00 1481.00 1420.00 580.00 294.50 165.00 35.50 61.00 338.57 b 560.00 885.50 1417.00 9359.07
1913 1676.00 1509.50 1398.62 a 603.50 428.00 67.50 33.00 11.00 262.00 740.00 831.50 1226.50 8787.12
1914 1496.50 1679.00 1174.00 695.00 307.00 42.50 16.00 79.50 181.50 439.00 915.00 1750.00 8775.00
1915 1733.00 1230.50 1274.00 391.50 447.50 190.00 90.50 121.50 255.50 519.50 921.50 1444.00 8619.00
1916 1988.50 1676.00 1217.50 742.00 386.50 181.00 0.00 84.50 297.00 707.00 1036.00 1767.00 10083.00
1917 1813.00 1729.00 1271.50 777.00 429.00 176.50 30.48 a 75.95 a 236.00 914.00 794.00 1835.00 10081.43
1918 1947.50 1455.00 917.50 772.50 310.00 87.00 42.00 25.00 323.00 445.00 994.00 1283.50 8602.00
1919 1294.50 1378.00 1123.00 622.50 303.50 79.00 0.00 15.50 142.00 745.50 1241.50 1610.00 8555.00
1920 1687.50 1369.50 1103.00 882.50 288.00 85.50 10.50 45.00 142.50 371.00 1050.00 1383.00 8418.00
1921 1348.50 1077.50 966.50 531.50 275.50 31.00 6.50 34.00 185.00 483.50 1215.00 1347.50 7502.00
1922 1656.50 1634.50 1103.00 587.00 209.00 25.50 24.50 6.00 127.00 468.50 902.00 1524.50 8268.00
1923 1477.50 1509.50 1295.50 661.50 283.00 74.00 2.50 41.00 123.50 611.50 825.50 1175.00 8080.00
1924 1775.00 1244.50 1175.00 623.00 502.00 132.50 29.00 189.50 265.50 326.00 1003.50 1761.50 9027.00
1925 1693.50 1229.50 927.50 390.00 406.00 122.00 55.00 17.00 154.50 930.00 a 1023.00 1509.50 8457.50
1926 1610.50 1141.50 1198.50 671.00 199.00 172.00 24.00 26.50 307.00 612.00 1241.50 1613.50 8817.00
1927 1575.50 1255.50 1012.50 639.50 436.00 164.50 41.50 97.50 246.50 449.50 1168.50 1937.50 9024.50
1928 1576.00 1290.50 1011.50 840.50 211.50 155.50 9.50 52.00 284.50 606.00 981.00 1271.50 8290.00
1929 2049.00 1692.50 994.50 616.00 438.50 118.00 4.50 20.50 344.00 548.50 1162.50 1522.00 9510.50
1930 1932.50 1024.50 1099.50 525.00 337.00 75.00 13.00 13.50 211.00 645.50 956.50 1299.00 8132.00
1931 1217.50 947.50 1056.50 542.50 386.50 35.50 8.50 30.00 98.50 432.00 888.50 1237.50 6881.00
1932 1622.50 1324.50 1340.00 572.50 227.50 3.50 16.00 5.50 170.50 656.50 1066.00 1554.00 8559.00
1933 1314.00 1412.00 1038.50 633.50 279.50 15.50 0.00 11.00 82.00 579.00 1001.50 1510.00 7876.50
1934 1404.00 1247.00 1114.00 610.50 86.00 19.50 4.50 61.50 306.00 392.50 868.50 1531.00 7645.00
1935 1721.50 1041.50 945.50 727.50 397.00 119.50 0.00 55.00 133.50 606.00 1210.00 1516.50 8473.50
1936 2080.50 2069.00 1086.50 759.50 151.00 64.50 0.00 4.50 118.00 653.00 1159.00 1474.00 9619.50
1937 2054.50 1517.50 1207.50 734.00 212.00 100.00 4.50 5.00 189.50 625.50 1098.00 1549.00 9297.00
1938 1693.50 1386.00 951.50 543.50 338.50 60.00 0.00 1.50 120.50 329.50 1104.50 1351.00 7880.00
1939 1428.00 1623.00 1080.00 630.50 117.50 49.50 0.00 21.50 176.50 569.00 842.50 1138.00 7676.00
1940 1878.50 1381.00 1224.50 777.00 e 301.70 c 83.00 18.00 85.00 154.00 386.50 1254.00 1283.73 c 8826.93
1941 1620.50 1516.00 1215.50 511.00 193.00 113.00 44.84 c 25.00 211.50 563.00 1002.00 1280.50 8295.84
1942 1446.50 1319.50 997.50 508.00 426.00 112.50 34.50 37.00 368.00 622.00 823.50 f 1613.00 7484.50
1943 1951.50 1372.00 1362.00 613.50 434.00 125.50 3.00 23.50 294.00 537.50 1094.00 1349.00 9159.50
1944 1275.50 1431.00 1363.50 767.50 235.50 95.50 15.00 67.00 166.50 h 508.50 964.00 1459.50 8182.50
1945 1592.50 1329.00 891.50 739.50 458.00 212.50 31.50 27.50 289.00 564.00 1124.00 1742.50 9001.50
1946 1672.00 1451.50 878.50 485.00 431.00 115.00 4.50 57.50 249.50 621.50 1102.50 1441.50 8510.00
1947 1408.00 1491.00 1217.50 770.50 437.50 129.50 24.00 12.50 238.00 355.50 1261.50 1613.00 8958.50
1948 1776.50 1592.50 1313.00 563.00 327.00 98.00 7.50 38.00 131.50 549.50 1005.00 1470.50 8872.00
1949 1809.50 1539.00 1161.50 586.00 223.50 52.50 22.50 25.00 294.50 566.00 838.50 1489.00 8607.50
1950 2002.50 1372.00 1314.40 a 944.00 423.00 90.50 26.50 90.50 192.00 499.00 1220.00 1623.50 9797.90
1951 1834.50 1306.00 1488.50 755.00 255.00 171.00 40.50 54.00 340.50 659.50 1199.50 1712.50 9816.50
1952 1767.00 1346.50 1372.00 582.00 326.50 43.50 16.50 35.00 171.50 680.00 1008.00 1402.00 8750.50
1953 1611.50 1322.50 1091.50 820.50 357.00 80.00 20.00 8.00 208.00 382.00 913.50 1470.50 8285.00
1954 1871.50 956.00 1249.00 663.50 470.00 87.50 8.50 10.50 210.00 646.50 858.00 1337.00 8368.00
1955 1561.00 1562.50 1256.00 405.50 164.00 89.00 3.00 12.92 a 228.50 512.00 1348.00 1755.50 8897.92
1956 1761.50 1605.50 1284.00 839.50 317.50 17.00 18.50 39.50 272.50 392.50 1079.00 1333.50 8960.50
1957 1873.50 1347.00 1142.00 675.50 391.00 85.50 0.00 45.50 268.00 588.00 1026.00 1263.00 8705.00
1958 1407.50 1444.00 1115.50 649.50 238.00 189.50 38.00 43.50 154.50 479.50 1024.00 1635.50 8419.00
1959 1808.00 1535.50 1009.00 650.50 330.00 66.50 5.50 1.00 229.00 738.50 1290.50 1204.00 8868.00
1960 1673.00 1540.50 1572.00 681.50 300.50 93.00 15.50 9.00 237.50 533.00 993.50 1529.00 9178.00
1961 1688.50 1263.50 963.50 815.00 415.50 61.00 7.50 6.50 321.00 526.00 1049.00 1625.50 8742.50
1962 1794.00 1486.00 1271.50 698.00 239.00 75.50 36.50 11.00 277.00 493.50 905.00 1431.00 8718.00
1963 1923.50 1382.50 963.50 593.00 319.50 40.00 2.00 37.50 139.50 285.00 906.00 1700.50 8292.50
1964 1435.00 1254.00 1356.00 617.00 242.50 79.50 0.00 z 84.50 287.50 566.50 1087.00 1729.50 8739.00
1965 1851.00 1507.50 1517.00 700.50 278.00 57.00 10.50 56.50 502.00 481.50 1056.50 1252.50 9270.50
1966 1965.50 1461.50 969.00 829.00 408.00 86.00 0.00 83.50 241.00 601.00 1182.50 1461.50 9288.50
1967 1571.00 1564.50 1052.00 696.50 467.50 75.00 51.00 60.97 a 184.50 624.50 1056.00 1479.50 8882.97
1968 1636.50 1482.00 883.50 624.50 435.00 90.00 26.50 62.00 212.00 570.00 1014.00 1621.50 8657.50
1969 1891.00 1355.50 1480.00 603.00 287.50 213.50 18.08 a 7.00 164.50 726.00 972.00 1428.00 9146.08
1970 1934.00 1370.00 1269.00 716.00 293.50 54.50 16.50 15.00 236.50 625.00 1111.00 1608.00 9249.00
1971 1891.00 1405.50 1127.00 607.50 360.00 36.00 44.50 33.50 242.50 527.50 1055.00 1585.00 8915.00
1972 1873.00 1635.00 1194.00 737.00 257.50 69.00 31.50 64.50 231.00 687.50 1080.50 1718.00 9578.50
1973 1544.50 1239.50 881.50 681.50 311.50 42.50 10.50 1.50 255.00 398.00 1041.00 1617.00 8024.00
1974 1771.00 1358.50 1147.50 600.50 402.00 83.50 0.50 59.50 310.00 502.00 1023.00 1368.00 8626.00
1975 1603.50 1485.50 1377.00 840.00 241.50 88.50 12.50 17.00 306.00 507.00 1000.50 1490.50 8969.50
1976 1677.50 1169.00 1104.00 513.50 337.50 34.00 3.00 6.00 194.00 712.50 1213.50 1642.50 8607.00
1977 1984.00 1208.50 989.50 427.50 83.00 27.00 8.00 66.00 198.00 596.50 1129.50 1688.00 8405.50
1978 2045.50 1648.00 1230.50 694.50 266.50 75.50 17.00 18.50 152.50 566.50 1149.00 1655.00 9519.00
1979 2061.00 1718.00 1277.50 779.00 435.50 81.00 12.50 58.50 143.50 615.50 1076.00 1248.00 9506.00
1980 1617.00 1511.50 1229.50 535.50 249.00 42.00 13.00 41.50 211.00 651.00 895.00 1460.50 8456.50
1981 1457.50 1196.50 899.50 477.50 324.50 47.50 19.50 21.00 175.00 606.00 876.50 1605.00 7706.00
1982 2087.00 1413.50 1169.50 715.00 239.00 154.50 0.00 43.50 243.50 592.50 1144.50 1311.50 9114.00
1983 1412.50 1114.50 1069.50 767.50 379.00 103.50 4.00 0.00 233.00 607.50 1062.00 2031.50 8784.50
1984 856.50 k 1140.50 1299.00 636.00 352.50 44.50 8.00 19.50 334.50 547.50 970.50 1580.00 6932.50
1985 1727.50 1375.50 933.00 467.00 161.00 136.50 0.00 z 0.00 z 294.50 591.00 1386.00 1808.50 8880.50
1986 1463.50 1463.50 996.00 573.50 253.00 33.00 0.00 66.00 240.50 535.50 1159.00 1249.50 8033.00
1987 1346.50 946.00 948.00 390.00 121.50 20.00 4.50 52.50 141.00 665.00 842.00 1282.50 6759.50
1988 1733.00 1495.50 979.00 540.50 109.50 1.50 3.50 29.50 158.50 654.50 1022.50 1390.00 8117.50
1989 1393.50 1654.00 1227.50 611.00 267.00 105.00 0.00 17.00 214.50 549.00 1128.00 1735.50 8902.00
1990 1226.50 1222.50 952.50 652.00 318.50 57.50 30.00 32.00 157.00 597.00 921.72 a 1584.00 7751.22
1991 1658.00 1100.50 992.00 530.50 236.50 16.50 21.00 10.50 214.50 623.50 1222.50 1294.00 7920.00
1992 1358.00 1097.00 938.00 706.50 233.00 99.50 93.50 119.50 213.50 595.00 1145.00 1572.00 8170.50
1993 1695.00 1491.50 1219.50 703.50 305.50 131.00 10.00 35.00 306.00 602.50 1150.50 1459.00 9109.00
1994 2011.00 1613.50 1042.00 614.50 186.00 36.50 15.50 58.00 170.00 482.00 925.00 1360.50 8514.50
1995 1555.00 1309.00 1073.00 799.50 357.50 63.50 15.50 4.50 246.00 624.50 1173.50 1451.50 8673.00
1996 1851.50 1385.50 1309.00 584.00 g 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4546.00
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 0.00 z 0.00 z 994.58 a 589.00 258.50 81.21 a 10.50 16.00 256.00 594.68 a 780.52 a 1272.00 4852.99
2000 1581.50 1119.09 a 845.00 651.00 236.00 95.50 37.00 20.50 209.00 485.00 1220.00 1864.00 8363.59
2001 1543.59 b 1693.50 1326.00 638.50 255.50 91.50 10.50 22.50 191.00 599.50 737.00 1335.00 8444.09
2002 1423.50 1076.00 1424.00 687.00 466.50 44.00 6.00 35.50 188.50 850.00 1038.00 1343.85 a 8582.85
2003 1574.80 a 1506.00 1146.50 596.50 336.50 89.50 1.00 21.00 255.00 505.00 1148.00 1320.50 8500.30
2004 1711.50 1359.50 32.00 z 590.00 359.50 128.00 32.00 94.50 132.00 530.00 869.00 1327.50 7133.50
2005 1644.50 1175.00 1071.50 508.50 338.50 21.00 10.00 24.50 109.50 544.00 963.50 1500.00 7910.50
2006 1230.00 1376.50 1044.00 471.00 282.50 37.50 3.00 6.00 293.50 690.50 996.00 1205.00 7635.50
2007 1531.00 1557.50 969.50 697.00 183.00 45.50 0.50 31.50 191.00 453.50 1005.50 1635.50 8301.00
2008 1736.50 1526.50 1192.50 766.00 381.50 90.00 9.50 13.00 197.00 606.00 1028.00 1740.00 9286.50
2009 1819.00 1388.50 1170.50 702.50 312.00 150.00 34.00 68.00 109.50 802.50 791.50 1688.50 9036.50
2010 1739.50 1505.00 955.00 435.00 334.50 50.00 1.50 7.50 227.00 511.50 1037.50 1661.00 8465.00
2011 1853.00 1540.50 1344.00 719.00 357.50 83.50 1.00 3.00 240.00 477.00 976.00 1256.50 8851.00
2012 1390.00 1211.50 658.00 530.00 225.00 34.00 0.00 37.50 212.00 658.00 994.00 1490.50 7440.50
2013 1619.50 1402.00 1393.97 a 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 4415.47
Period of Record Statistics
MEAN 1680.53 1407.52 1142.84 645.05 313.66 87.69 19.45 40.19 221.62 570.41 1040.40 1497.16 8655.06
S.D. 216.20 193.52 181.47 116.32 95.49 49.37 19.47 32.96 71.80 115.56 136.78 181.36 622.69
SKEW -0.07 -0.05 0.00 0.00 0.03 0.57 1.42 1.30 0.59 0.21 0.15 0.28 -0.34
MAX 2121.00 2069.00 1572.00 944.00 623.74 213.50 93.50 189.50 502.00 930.00 1394.00 2031.50 10083.00
MIN 1217.50 946.00 620.50 390.00 83.00 1.50 0.00 0.00 82.00 285.00 737.00 1138.00 6759.50
NO YRS 114 115 114 114 114 112 109 109 110 111 111 114 97