LANGDON EXP FARM, NORTH DAKOTA

Monthly Total Heating Degree Days

(324958)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1897 0.00 z 0.00 z 0.00 z 878.57 b 409.00 260.50 67.17 a 149.50 150.00 a 0.00 z 0.00 z 0.00 z 1914.74
1898 0.00 z 0.00 z 0.00 z 724.04 d 446.40 a 227.50 115.73 a 143.63 a 294.50 g 0.00 z 0.00 z 0.00 z 1657.31
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 0.00 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
1901 0.00 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
1902 0.00 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
1903 0.00 z 0.00 z 0.00 z 763.00 442.50 0.00 z 119.50 195.50 554.00 0.00 z 0.00 z 0.00 z 2074.50
1904 0.00 z 0.00 z 0.00 z 941.79 b 395.00 200.50 139.00 220.00 447.22 c 0.00 z 0.00 z 0.00 z 2343.51
1905 2063.64 b 1715.50 0.00 z 832.76 a 524.50 279.50 58.50 43.40 a 226.50 803.93 a 1126.07 b 0.00 z 7674.30
1906 0.00 z 1621.41 a 1460.10 a 561.50 500.00 112.50 65.00 101.27 a 186.72 a 0.00 z 0.00 z 0.00 z 4608.50
1907 2300.72 a 1616.22 a 1403.50 1173.00 e 772.42 a 172.50 61.47 b 200.00 498.50 0.00 z 0.00 z 0.00 z 8198.32
1908 1746.85 a 1704.02 b 0.00 z 772.00 495.50 216.00 54.00 f 182.90 a 269.44 c 0.00 z 0.00 z 0.00 z 5386.71
1909 1994.00 1706.44 a 0.00 z 1071.92 d 0.00 z 110.00 i 26.00 g 0.00 z 0.00 z 0.00 z 0.00 z 1893.07 a 6665.43
1910 1802.50 1833.00 850.00 645.00 565.00 144.00 46.00 169.00 410.50 0.00 z 0.00 z 1772.17 a 8237.17
1911 0.00 z 1698.15 a 0.00 z 825.00 439.00 115.00 146.50 200.50 451.00 0.00 z 0.00 z 1737.50 5612.65
1912 2435.50 1653.00 a 1697.00 771.00 433.50 201.00 112.00 162.50 476.50 0.00 z 0.00 z 0.00 z 7942.00
1913 0.00 z 0.00 z 0.00 z 649.00 481.50 129.00 110.50 75.00 345.50 872.65 a 0.00 z 0.00 z 2663.15
1914 1838.50 2101.50 1367.50 898.45 a 369.50 158.00 28.00 171.00 273.50 512.50 1206.00 1989.00 10913.45
1915 2049.50 1452.00 1331.00 555.00 450.50 320.00 153.00 125.50 400.00 689.00 1262.50 1696.00 10484.00
1916 2336.88 a 1826.00 1620.00 927.50 529.14 b 280.00 13.50 104.50 360.00 916.50 1191.50 2111.00 12216.52
1917 2288.50 2041.93 a 1448.00 935.50 492.00 262.50 65.50 132.50 317.00 1073.50 985.50 2207.00 12249.43
1918 2218.00 1726.00 1064.00 820.00 586.00 196.00 175.67 a 100.50 477.00 673.00 1161.50 1674.50 10872.17
1919 1732.00 1799.00 1654.00 780.00 361.50 115.00 32.50 104.00 310.00 1080.00 1620.00 1992.00 11580.00
1920 2143.50 1736.50 1547.50 1105.50 394.00 153.00 72.50 53.50 194.00 525.00 1203.50 1704.50 10833.00
1921 1772.50 1512.00 1468.50 861.50 388.00 115.00 20.50 112.50 313.00 616.50 1423.50 1614.00 10217.50
1922 1927.00 1854.50 1285.50 729.50 263.50 a 130.00 105.50 36.50 223.00 661.50 1063.97 a 1950.50 10230.97
1923 1926.13 a 1854.00 1756.00 925.50 398.50 67.00 20.00 168.50 248.00 711.00 984.50 1460.00 10519.13
1924 2114.20 a 1488.50 1297.00 904.50 647.00 262.00 96.50 139.50 349.50 511.50 1306.03 a 2064.00 11180.23
1925 1928.00 1590.50 1374.00 588.00 419.53 a 191.50 112.00 62.50 338.00 1065.37 a 1193.65 d 1685.76 b 10548.81
1926 1707.07 a 1374.50 1387.50 785.50 341.00 266.00 51.00 119.50 446.00 799.59 b 1427.00 1904.50 10609.15
1927 1936.50 1626.59 a 1188.33 a 823.50 544.50 183.50 81.50 119.50 343.97 a 601.50 1468.00 2101.00 11018.39
1928 1879.50 1537.50 1358.50 922.50 321.00 238.50 53.00 116.77 a 366.50 771.50 1136.50 1492.50 10194.27
1929 2255.77 a 1849.50 1208.00 913.00 607.00 292.76 a 50.00 80.50 440.69 a 683.50 1341.21 a 1852.00 11573.92
1930 2272.50 1424.50 1472.00 662.50 476.00 139.29 b 32.50 43.00 373.50 867.00 1242.50 1633.00 10638.29
1931 1697.50 1264.50 1438.92 a 749.00 477.00 123.00 127.00 87.00 250.00 645.00 1149.00 1479.00 9486.92
1932 1845.00 1756.57 a 1608.00 788.00 365.28 a 24.00 87.00 50.00 294.00 940.00 1393.50 1843.00 10994.35
1933 1885.00 1780.50 1345.00 831.00 310.00 43.00 6.50 51.00 217.00 902.50 1314.50 2029.50 10715.50
1934 1777.00 1567.48 a 1375.00 776.00 289.50 128.00 33.00 132.00 476.50 650.50 1064.50 1800.00 10069.48
1935 2183.50 1303.00 1389.00 858.00 480.00 218.79 a 9.00 133.50 357.50 828.50 1616.50 1803.00 11180.29
1936 2433.50 2420.50 1463.00 1068.00 249.00 137.50 15.00 85.50 289.50 877.00 0.00 z 1745.00 10783.50
1937 2426.50 1737.50 1382.50 808.00 366.00 153.00 24.50 27.00 275.17 a 741.00 1303.00 1835.50 11079.67
1938 1941.50 1685.50 1008.00 769.50 439.50 153.00 33.07 a 35.50 146.50 472.50 1347.50 1639.50 9671.57
1939 1786.50 1973.50 1386.50 766.50 255.00 183.00 7.75 a 46.50 272.50 832.35 a 969.00 1268.50 9747.60
1940 1947.00 1526.12 a 1520.00 917.00 384.00 162.50 35.50 107.50 180.00 533.00 1347.50 1596.50 10256.62
1941 1836.50 1656.50 1427.00 687.00 276.50 144.00 38.00 92.00 343.50 704.50 1172.00 1495.50 9873.00
1942 1568.50 1564.00 1170.50 709.00 514.00 193.00 85.00 94.00 401.50 594.00 1187.50 1869.50 9950.50
1943 2162.00 1501.00 1554.50 670.50 507.50 220.50 7.50 59.50 338.04 b 533.50 1165.50 1474.00 10194.04
1944 1453.90 a 1652.00 1539.00 735.50 276.00 167.50 51.00 102.50 308.50 567.50 1159.50 1671.00 9683.90
1945 1822.00 1534.50 1067.50 895.50 612.50 260.00 75.50 63.00 426.50 691.00 1404.00 1935.00 10787.00
1946 1908.05 a 1761.50 1067.00 567.50 457.00 143.50 33.00 101.00 353.50 819.50 1356.50 1772.50 10340.55
1947 1695.18 a 1721.50 1403.50 798.50 553.00 207.00 40.50 42.00 371.50 485.00 1348.50 1768.50 10434.68
1948 1936.50 1824.50 1607.50 897.50 332.50 135.00 44.00 41.00 129.50 574.00 1198.00 1860.00 10580.00
1949 2068.50 1901.00 1512.50 661.00 352.50 137.00 54.50 57.00 323.00 769.32 a 1001.50 1899.00 10736.82
1950 2503.00 1739.50 1564.00 1105.50 565.00 181.50 86.50 152.50 265.00 638.08 a 1424.50 1896.50 12121.58
1951 2080.00 1638.50 1655.50 850.86 a 297.00 232.50 81.00 139.50 449.48 a 773.00 1404.00 1942.00 11543.35
1952 2019.00 1416.00 1437.00 532.50 378.00 108.62 a 61.50 85.50 227.00 767.00 1122.50 1568.60 a 9723.22
1953 1801.00 1478.50 1296.00 918.00 433.00 159.00 55.50 44.00 312.00 422.50 968.50 1581.50 9469.50
1954 2219.50 1162.50 1366.00 872.00 558.00 184.50 44.00 92.00 375.00 696.00 1006.50 1415.00 9991.00
1955 1892.00 1698.00 1704.00 565.50 319.00 117.00 22.50 25.00 330.00 623.50 1536.00 2017.50 10850.00
1956 1955.50 1858.00 1604.00 1097.00 463.00 59.00 78.00 65.50 427.00 576.50 1150.50 1685.50 11019.50
1957 2099.50 1612.50 1304.50 793.50 362.50 230.00 22.50 122.00 390.00 680.00 1171.50 1489.50 10278.00
1958 1576.00 1620.00 1171.00 673.50 310.50 244.00 99.50 99.00 275.00 587.00 1263.10 a 1926.00 9844.60
1959 2164.00 1768.50 1227.00 777.50 461.50 113.00 38.50 38.00 337.50 949.00 1461.50 1456.50 10792.50
1960 1965.50 1691.50 1629.50 854.00 370.50 151.50 38.00 43.40 a 260.00 654.00 1200.50 1790.50 10648.90
1961 1906.00 1462.50 1195.00 899.50 444.50 63.00 48.50 17.50 402.93 a 662.00 1173.00 1932.50 10206.93
1962 2036.00 1813.00 1471.00 899.00 439.50 94.00 58.50 58.00 360.52 a 581.00 1054.50 1649.50 10514.52
1963 2113.50 1660.50 1160.00 722.50 431.50 69.00 22.50 42.00 196.50 349.00 1101.50 1910.50 9779.00
1964 1761.50 1458.00 1551.00 695.00 305.50 209.50 14.00 160.00 393.00 654.50 1189.00 2020.00 10411.00
1965 2101.50 1654.50 1629.00 801.00 427.50 129.50 58.00 125.00 608.50 612.50 1329.50 1575.50 11052.00
1966 2417.00 1764.50 1248.00 956.50 549.50 164.50 15.00 106.50 259.00 687.50 1412.00 1784.00 11364.00
1967 1890.50 1812.50 1413.50 932.50 565.00 143.00 76.00 109.00 213.50 758.50 1187.00 1665.00 10766.00
1968 1968.50 1692.00 1125.50 735.50 484.50 188.00 91.00 167.00 307.00 702.00 1166.50 1875.00 10502.50
1969 2225.00 1607.50 1656.00 736.50 440.50 351.50 88.50 35.50 298.00 914.00 1178.50 1576.00 11107.50
1970 2091.00 1638.50 1601.50 889.50 490.50 60.50 27.50 58.00 305.00 677.00 1246.00 1881.00 10966.00
1971 2171.00 1517.50 1434.00 788.00 395.00 89.00 139.00 64.00 352.50 678.50 1282.00 1842.00 10752.50
1972 2116.00 1861.50 1415.50 846.50 270.00 103.50 121.00 74.00 429.00 815.00 1342.50 2025.50 11420.00
1973 1710.00 1447.50 1016.50 807.50 414.50 144.50 63.50 19.00 338.00 539.50 1393.50 1849.50 9743.50
1974 2189.00 1717.00 1594.00 889.50 561.50 138.50 17.00 155.50 456.00 0.00 z 1217.00 1482.50 10417.50
1975 1792.00 1692.50 1566.00 952.50 399.50 149.50 32.00 134.00 376.50 680.50 1168.00 1741.50 10684.50
1976 1903.50 1493.00 1562.50 627.50 347.00 105.00 34.50 48.00 278.00 866.00 1295.50 1934.00 10494.50
1977 2178.00 1424.00 1130.50 547.50 101.00 111.00 35.00 203.50 330.50 595.00 1223.50 1981.00 9860.50
1978 2243.50 1798.00 1406.50 792.50 238.50 126.00 67.50 103.50 251.50 655.00 1416.72 a 1979.00 11078.22
1979 2278.50 1989.00 1565.00 1109.50 594.50 137.00 38.00 125.50 264.50 723.00 1254.50 1458.00 11537.00
1980 1995.00 1707.00 1502.50 536.50 260.00 136.00 35.50 135.50 366.50 774.00 1045.18 b 1755.63 a 10249.31
1981 1676.00 1367.00 1073.00 632.07 a 402.00 173.04 b 44.50 15.00 g 341.50 782.00 959.00 1798.50 9248.60
1982 2463.98 a 1711.50 1458.50 900.50 0.00 z 318.50 47.00 162.00 372.50 746.00 1320.00 1574.50 11074.98
1983 1663.00 1408.50 1338.50 884.50 568.50 164.00 38.00 20.50 378.50 777.00 1140.00 2203.50 10584.50
1984 1831.50 1264.50 1444.00 697.50 527.00 150.50 38.50 36.00 494.00 731.00 1275.50 1957.00 10447.00
1985 1988.50 1760.50 1171.50 663.00 294.50 300.00 73.00 204.50 479.00 812.00 1630.50 2047.55 a 11424.55
1986 1751.50 1702.50 1187.00 794.00 377.50 130.50 44.00 143.50 405.50 733.50 1493.00 1570.50 10333.00
1987 1662.50 1275.50 1353.00 552.00 279.50 97.00 55.50 143.50 291.50 853.00 1020.50 1487.50 9071.00
1988 2004.00 1770.50 1290.00 750.00 265.50 29.50 26.00 60.50 370.50 835.00 1271.50 1720.50 10393.50
1989 1856.50 1919.50 1641.50 878.00 326.50 180.00 6.00 80.00 319.00 729.50 1389.50 2027.50 11353.50
1990 1572.00 1619.00 1270.00 832.50 482.00 136.00 77.00 65.00 280.00 807.50 1209.50 1902.50 10253.00
1991 2058.00 1372.50 1279.00 675.00 339.00 71.00 67.00 39.50 375.50 933.00 1455.00 1643.50 10308.00
1992 1697.00 1499.00 1237.50 930.00 374.50 213.00 218.50 185.00 439.00 786.50 1289.00 1942.50 10811.50
1993 2022.00 1713.00 1405.00 807.50 413.00 263.50 142.50 106.50 471.50 878.50 1352.50 1698.50 11274.00
1994 2331.00 1925.00 1238.50 814.50 364.00 100.50 111.00 138.00 252.50 647.50 1160.50 1642.50 10725.50
1995 1891.50 1618.00 1425.00 1000.00 489.00 91.50 69.00 49.00 356.00 773.00 1515.50 1882.00 11159.50
1996 2219.00 1752.50 1682.00 1067.50 514.00 144.50 71.00 53.00 338.00 778.50 1659.50 2031.50 12311.00
1997 2141.00 1543.50 1557.50 1072.00 559.50 53.50 78.50 88.00 240.00 760.00 1304.50 1349.50 10747.50
1998 1886.00 1180.00 1435.50 603.00 300.00 225.50 50.00 19.00 206.50 700.50 1239.00 1682.00 9527.00
1999 2041.00 1382.50 1239.50 735.00 392.50 168.50 56.50 88.00 392.50 834.00 956.00 1433.00 9719.00
2000 1859.00 1354.50 1035.50 809.00 371.00 251.50 67.50 65.50 0.00 z 687.50 1342.00 2150.00 9993.00
2001 1704.00 1835.50 1397.50 803.50 350.00 187.00 47.00 50.50 321.50 831.50 931.50 1597.00 10056.50
2002 1719.50 1394.00 1697.00 901.50 632.00 128.00 20.50 0.00 z 277.00 1048.00 1262.00 1521.50 10601.00
2003 1900.50 1818.00 1505.00 738.00 0.00 z 142.00 40.50 39.50 337.00 644.50 1446.50 1530.00 10141.50
2004 2170.00 1609.00 1348.50 804.50 613.50 249.00 111.00 262.50 267.50 745.50 1032.00 1676.00 10889.00
2005 2058.00 1525.00 1432.00 631.00 512.50 0.00 z 75.50 108.00 257.50 677.00 1132.00 1565.00 9973.50
2006 1408.50 1692.50 1371.00 599.00 395.50 86.00 21.50 39.00 337.50 844.00 1233.50 1524.00 9552.00
2007 1831.50 0.00 z 1320.50 778.00 393.50 111.50 24.00 111.50 318.50 660.50 1208.00 1838.50 8596.00
2008 1942.00 1847.50 1467.50 840.00 524.50 175.50 51.00 0.00 z 313.50 706.00 1210.00 2068.50 11146.00
2009 2119.76 b 1685.00 1570.50 902.50 547.50 211.00 92.50 121.50 116.50 878.00 937.50 1908.50 11090.76
2010 1825.50 1650.50 1161.50 558.50 413.50 149.50 23.50 63.00 388.50 597.00 1195.00 1832.50 9858.50
2011 2017.00 1685.00 1525.00 851.00 458.28 a 158.00 24.80 a 35.00 278.00 594.17 a 1145.50 1466.00 10237.75
2012 1622.85 a 1433.43 a 954.00 662.50 374.50 107.50 6.20 a 56.50 228.50 k 571.00 i 737.50 m 1095.00 l 5217.48
2013 1204.50 k 1062.50 j 992.50 m 0.00 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 1974.66 1647.96 1390.45 804.21 426.81 163.50 60.37 97.43 333.29 724.23 1244.31 1765.12 10597.28
S.D. 231.22 200.39 189.15 141.63 108.99 66.73 39.92 53.16 90.80 139.45 163.53 208.35 664.67
SKEW 0.11 0.23 -0.43 0.18 0.14 0.44 1.16 0.59 0.14 0.21 0.27 -0.06 0.33
MAX 2503.00 2420.50 1756.00 1173.00 772.42 351.50 218.50 262.50 608.50 1080.00 1659.50 2207.00 12311.00
MIN 1408.50 1162.50 850.00 532.50 101.00 24.00 6.00 17.50 116.50 349.00 931.50 1268.50 9071.00
NO YRS 105 106 103 112 109 109 110 108 108 99 98 101 88