GRAND FORKS INTL AP, NORTH DAKOTA

Monthly Total Heating Degree Days

(323616)

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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.50 h 129.00 566.50 1097.50 1791.00 3584.00
1949 1978.00 1862.50 1455.50 605.50 328.00 100.00 21.50 41.00 300.50 651.00 958.50 1795.93 a 10097.93
1950 2375.00 1737.00 1483.50 1058.00 493.00 128.50 45.00 110.50 221.00 582.00 1322.00 1833.50 11389.00
1951 2016.50 1523.00 1499.00 777.00 240.50 162.50 38.50 69.50 334.00 722.50 1385.69 a 1852.00 10620.69
1952 2026.50 1426.00 1330.00 527.00 346.50 75.00 25.50 56.00 209.50 755.50 1068.50 1466.50 9312.50
1953 1764.50 1417.00 1197.00 830.50 367.50 114.50 33.00 14.50 270.50 424.50 949.00 1599.00 8981.50
1954 2135.00 1115.50 1283.00 795.50 491.50 107.50 22.00 41.50 300.00 665.00 979.50 1472.50 9408.50
1955 1833.50 1715.00 1646.62 a 482.07 a 252.00 87.00 7.00 14.00 305.00 596.50 1453.50 1931.00 10323.19
1956 1933.00 1825.50 1533.50 977.50 403.50 29.00 36.50 48.50 368.00 515.00 1076.00 1608.00 10354.00
1957 1992.50 1536.50 1229.00 719.00 324.00 153.75 b 3.00 54.00 327.50 623.00 1144.50 1432.00 9538.75
1958 1527.50 1514.50 1094.50 626.50 285.00 212.50 53.00 72.50 221.50 559.50 1155.00 1825.50 9147.50
1959 2066.50 1697.50 1177.50 699.00 402.00 81.00 22.00 16.50 272.50 810.50 1418.00 1317.50 9980.50
1960 1841.00 1652.00 1580.50 731.50 287.00 104.00 41.00 23.00 250.50 607.00 1119.50 1743.00 9980.00
1961 1848.50 1363.00 1014.00 831.50 386.00 47.50 14.00 7.00 296.50 553.50 1067.50 1781.00 9210.00
1962 1927.00 1698.50 1398.00 804.00 320.00 79.50 26.00 30.50 326.00 532.50 1015.50 1556.00 9713.50
1963 2003.50 1597.50 1081.00 655.86 a 378.50 61.50 11.00 29.00 157.50 257.50 958.00 1814.50 9005.36
1964 1625.50 1396.50 1442.00 672.50 225.00 105.50 2.50 80.00 288.50 631.50 1114.00 1925.50 9509.00
1965 2059.00 1635.50 1516.00 765.00 442.00 115.00 54.00 115.00 561.00 613.50 1279.00 1464.50 10619.50
1966 2257.50 1704.50 1163.50 860.50 494.50 144.00 5.50 96.50 258.50 685.50 1339.00 1757.00 10766.50
1967 1806.00 1844.50 1340.50 867.50 528.50 130.00 61.00 91.00 191.00 704.50 1097.00 1582.00 10243.50
1968 1874.00 1683.50 1101.00 717.00 479.50 208.00 67.00 124.50 280.50 685.00 1073.00 1762.50 10055.50
1969 2121.00 1543.50 1628.00 679.00 397.50 304.00 44.00 20.50 290.00 813.00 1090.50 1578.00 10509.00
1970 2046.00 1580.00 1716.50 873.50 417.50 34.50 11.00 41.50 271.00 606.50 1118.00 1763.50 10479.50
1971 2100.00 1454.50 1181.00 656.50 327.50 37.00 86.00 41.00 255.50 610.50 1145.00 1641.50 9536.00
1972 1996.00 1787.00 1361.00 814.50 277.00 100.00 101.00 88.00 371.50 789.00 1187.50 1927.50 10800.00
1973 1709.00 1375.50 918.50 733.50 331.00 111.00 48.00 9.50 296.50 478.00 1284.50 1805.00 9100.00
1974 2116.00 1698.00 1504.50 785.50 495.00 90.00 6.50 118.50 409.00 629.50 1120.00 1435.50 10408.00
1975 1707.00 1608.00 1480.00 871.50 295.50 102.00 28.00 60.50 340.00 579.50 1090.00 1635.50 9797.50
1976 1861.00 1315.50 1401.00 593.00 297.50 64.00 12.50 16.00 241.50 800.00 1219.00 1803.50 9624.50
1977 2086.50 1280.00 1006.50 464.50 80.50 40.50 10.00 143.00 269.00 564.00 1224.50 1871.00 9040.00
1978 2098.00 1733.00 1295.50 685.00 205.50 101.00 31.00 64.00 196.00 591.50 1342.00 1878.50 10221.00
1979 2257.00 1934.00 1461.00 959.00 526.50 93.00 15.00 84.00 215.50 689.50 1173.50 1351.00 10759.00
1980 1819.50 1608.00 1369.50 476.50 223.00 77.50 10.00 61.50 303.00 684.00 967.00 1611.50 9211.00
1981 1586.00 1249.00 985.00 615.50 312.00 100.00 28.00 16.00 293.50 645.00 872.00 1686.50 8388.50
1982 2243.50 1555.00 1284.00 742.00 267.00 223.50 4.00 98.00 304.50 608.50 1250.50 1339.50 9920.00
1983 1515.00 1235.50 1100.50 724.50 432.50 93.00 24.00 5.00 305.00 653.00 1033.00 2013.50 9134.50
1984 654.50 p 1218.50 1346.00 605.00 382.50 65.00 25.00 27.00 392.00 587.50 1122.50 1769.50 7540.50
1985 1812.00 1515.00 965.50 521.50 167.50 190.00 44.00 105.50 365.50 692.00 1603.50 1975.50 9957.50
1986 1694.00 1618.50 1070.50 687.50 259.50 54.50 0.00 86.00 284.00 656.00 1352.00 1472.00 9234.50
1987 1551.50 1142.00 1191.00 451.00 191.00 59.00 18.50 103.00 221.00 761.50 1000.50 1467.50 8157.50
1988 1914.00 1658.00 1174.00 644.50 195.50 24.00 6.50 42.50 268.00 751.00 1159.00 1600.50 9437.50
1989 1771.50 1816.50 1491.00 779.00 244.50 110.00 0.50 37.00 239.50 647.50 1275.50 1918.50 10331.00
1990 1435.50 1405.00 1126.00 720.50 359.50 78.00 13.00 29.50 195.00 662.50 1078.50 1735.00 8838.00
1991 1888.00 0.00 z 1129.00 575.50 226.00 14.50 9.00 7.50 269.50 798.50 1317.50 1481.00 7716.00
1992 1518.50 1272.50 1062.50 758.00 254.00 146.50 100.00 93.50 300.50 644.50 1152.50 1767.50 9070.50
1993 1842.00 1537.50 1196.50 702.00 312.50 149.00 56.50 41.50 344.50 728.00 1221.00 1622.50 9753.50
1994 2221.50 1769.00 1104.50 685.50 228.50 26.50 18.50 69.00 166.00 489.50 999.50 1426.00 9204.00
1995 1758.00 0.00 z 1204.50 825.50 348.00 57.50 18.00 4.00 268.50 665.50 1370.50 1742.00 8262.00
1996 2129.00 1598.00 1522.50 885.50 371.00 64.00 7.50 10.00 249.00 644.50 1473.00 1851.50 10805.50
1997 1977.00 1449.00 0.00 z 842.50 389.50 5.50 31.00 25.50 124.50 0.00 z 0.00 z 0.00 z 4844.50
1998 1746.00 1100.00 1258.50 523.00 213.50 154.00 23.50 4.50 182.00 607.00 1185.00 1636.50 8633.50
1999 1876.53 a 1343.50 1199.18 a 639.50 313.00 107.00 19.50 56.00 346.00 717.00 924.00 1381.50 8922.72
2000 1785.50 1282.69 c 960.50 761.50 345.50 155.50 30.00 45.50 292.00 610.50 1212.50 2029.50 9511.19
2001 1589.00 1714.50 1258.00 679.50 289.00 130.50 25.00 36.00 246.50 738.50 855.50 1494.00 9056.00
2002 1585.00 1208.00 1465.50 791.00 551.50 69.00 11.00 52.00 220.50 944.00 1183.50 1437.50 9518.50
2003 1751.50 1689.00 1347.50 664.50 355.00 89.00 19.50 23.00 292.50 574.50 1334.50 1470.50 9611.00
2004 2041.50 1543.50 1229.00 726.50 482.50 169.00 79.00 176.50 192.50 632.50 998.00 1543.00 9813.50
2005 1979.00 1508.00 1280.50 561.00 399.00 46.00 40.50 55.50 188.00 634.50 1081.50 1525.00 9298.50
2006 1355.50 1684.00 1304.50 504.50 310.50 39.50 7.50 12.50 278.50 749.50 1090.00 1318.50 8655.00
2007 1697.00 1731.00 1195.00 723.50 269.50 70.00 10.50 65.00 256.50 559.00 1099.50 1794.50 9471.00
2008 1907.00 1769.50 1357.00 751.00 446.50 114.00 20.50 28.50 246.00 599.50 1065.50 1964.00 10269.00
2009 2047.00 1576.00 1356.00 747.50 440.50 151.00 50.00 71.00 80.50 778.00 872.50 1801.50 9971.50
2010 1788.00 1583.50 996.50 474.50 298.00 71.50 0.50 22.50 287.50 533.50 1152.00 1758.00 8966.00
2011 1998.50 1562.50 1413.00 723.00 370.50 74.00 5.00 8.50 212.00 483.50 1006.00 1325.50 9182.00
2012 1506.50 1333.00 835.50 568.50 256.00 44.50 0.00 28.00 262.00 718.00 1148.50 1640.00 8340.50
2013 1741.00 1517.50 1583.58 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 4842.08
Period of Record Statistics
MEAN 1875.92 1540.44 1279.40 706.24 337.97 99.15 27.16 52.63 269.25 642.05 1148.77 1665.63 9653.25
S.D. 222.76 200.11 198.64 130.78 99.83 55.39 23.65 38.42 73.81 106.40 155.44 194.07 698.94
SKEW -0.15 -0.37 0.01 0.07 0.11 1.05 1.34 0.89 0.61 -0.37 0.49 -0.10 0.16
MAX 2375.00 1934.00 1716.50 1058.00 551.50 304.00 101.00 176.50 561.00 944.00 1603.50 2029.50 11389.00
MIN 1355.50 1100.00 835.50 451.00 80.50 5.50 0.00 4.00 80.50 257.50 855.50 1317.50 8157.50
NO YRS 64 63 64 64 64 64 64 64 65 64 64 64 60