ITASCA UNIV OF MINN, MINNESOTA

Monthly Total Heating Degree Days

(214106)

Base Temperature = 65 F

File last updated on Apr 6, 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
1911 0.00 z 0.00 z 0.00 z 0.00 z 200.93 d 35.89 b 69.23 a 93.00 285.50 646.50 1347.00 1461.50 4139.55
1912 2353.50 1679.50 1520.50 611.00 337.50 148.50 78.00 53.00 h 281.38 a 474.00 915.00 0.00 z 8398.88
1913 1932.50 1640.50 1564.00 610.00 474.00 120.50 74.00 42.00 316.50 791.00 956.00 1313.50 9834.50
1914 1642.00 1912.00 1318.50 846.50 317.50 132.00 32.00 109.02 a 232.50 553.50 1081.50 1849.50 10026.52
1915 1936.98 a 1318.00 1298.50 472.50 512.00 265.50 143.50 199.00 294.50 611.50 1125.50 1564.00 9741.48
1916 2121.00 1775.50 1450.00 860.00 493.50 288.10 a 11.33 e 127.50 363.46 d 759.00 1085.00 1874.00 11208.39
1917 2075.00 1902.50 1317.50 a 861.72 a 499.00 234.50 40.50 140.50 289.00 1008.61 c 902.00 2000.50 11271.33
1918 2144.50 1618.50 978.50 708.00 382.50 164.50 86.50 66.00 503.50 653.00 994.50 1406.50 9706.50
1919 1458.00 1556.50 1325.25 a 660.00 369.00 64.00 11.50 127.00 300.00 951.50 971.00 k 1522.50 h 6822.75
1920 0.00 z 1661.00 1244.50 1030.86 a 419.53 a 140.50 72.33 a 99.00 200.00 524.00 1118.00 1550.60 e 8060.33
1921 1063.00 k 1331.00 1330.00 645.00 362.00 96.50 3.00 64.50 290.00 c 615.00 1351.50 1609.00 7697.50
1922 1853.50 1777.00 1199.00 740.17 a 251.50 87.60 e 79.00 74.50 260.00 614.50 976.50 1828.50 9741.77
1923 1778.50 1778.00 1665.50 812.50 394.00 88.50 21.24 d 147.50 232.50 641.50 1002.41 a 1517.50 10079.65
1924 2170.50 1557.50 0.00 z 873.00 695.00 310.00 160.50 264.00 470.00 0.00 z 0.00 z 0.00 z 6500.50
1925 0.00 z 0.00 z 0.00 z 694.14 a 546.50 248.50 205.50 192.00 182.50 l 1048.50 1156.00 1657.50 5748.64
1926 1691.50 1369.50 1375.50 789.50 283.50 248.79 a 65.50 97.50 373.00 784.00 1328.33 c 1804.00 10210.63
1927 1825.42 e 1465.50 1184.50 795.00 552.00 186.50 99.50 195.00 342.00 517.50 f 1313.00 2059.00 10017.42
1928 1755.50 1478.00 1318.50 0.00 z 156.00 m 250.50 41.69 b 132.00 430.50 715.00 1013.00 1381.00 8515.69
1929 2267.00 1753.50 1145.00 753.00 552.32 a 200.00 63.00 107.00 411.72 a 669.71 b 1305.52 a 1740.00 10967.77
1930 2152.00 1285.50 1320.08 a 712.76 a 436.50 128.50 39.50 63.50 328.00 746.00 1089.50 1520.55 a 9822.39
1931 1523.00 1164.50 1271.00 720.00 460.50 112.00 63.50 121.00 209.50 539.00 999.50 1369.00 8552.50
1932 1660.00 1603.00 1618.20 a 766.00 386.00 43.00 70.50 50.50 k 317.50 796.50 1260.00 1708.00 10228.70
1933 1605.50 1714.50 1302.00 795.00 361.50 45.00 a 18.50 92.00 208.50 814.00 1278.50 1825.50 10060.50
1934 1668.83 a 1584.50 1422.50 779.00 238.00 118.50 76.00 150.00 m 396.00 555.50 983.00 1730.50 9552.33
1935 1985.00 1255.50 1229.00 865.00 538.50 241.00 0.50 121.00 357.00 658.50 1402.50 1674.00 10327.50
1936 2189.00 2155.50 1300.50 995.50 235.50 176.50 27.90 a 73.00 227.00 822.00 1272.50 1604.00 11078.90
1937 2165.00 1632.50 1441.00 843.10 a 364.25 a 159.50 34.00 21.00 315.00 811.00 1206.00 1763.50 10755.85
1938 1889.00 287.00 w 426.50 n 768.50 482.50 130.50 30.00 33.50 267.50 502.00 1282.00 1621.30 a 7006.80
1939 1714.00 1827.50 1402.00 866.50 257.00 142.00 29.00 54.50 290.00 761.50 947.50 1292.00 9583.50
1940 1949.00 1477.50 1460.50 849.50 430.00 173.00 48.50 137.00 223.00 524.00 1266.50 1513.00 10051.50
1941 1702.50 1575.00 1316.00 557.50 261.50 133.00 43.50 89.00 293.00 612.50 1056.00 1429.00 9068.50
1942 1539.00 1464.50 1083.50 548.00 474.50 168.00 76.50 75.50 402.50 599.00 1158.50 1787.00 9376.50
1943 2044.00 1494.00 1531.50 741.00 479.50 147.50 4.00 52.00 346.00 585.00 1174.50 1465.00 10064.00
1944 1408.50 1563.50 1409.50 820.50 341.50 118.00 49.00 99.50 311.50 586.50 982.50 1576.50 9267.00
1945 1757.00 1472.00 989.50 831.00 575.00 277.00 87.50 82.00 384.00 703.00 1203.50 1761.00 10122.50
1946 1759.50 1600.00 932.00 629.50 498.00 155.50 47.00 126.00 351.50 706.00 1147.00 1699.00 9651.00
1947 1616.50 1640.00 1414.50 863.50 568.50 213.50 50.50 44.00 340.00 393.50 1279.50 1665.50 10089.50
1948 1920.00 1680.50 1366.50 719.00 422.00 181.50 50.00 68.00 82.00 l 572.95 c 1098.00 1671.00 9749.45
1949 1801.00 1725.00 1420.00 648.50 356.50 116.50 34.50 64.50 372.00 640.00 995.00 1697.77 a 9871.27
1950 2147.50 1549.50 1493.00 1072.50 560.00 176.00 81.00 171.65 d 237.50 610.50 1275.00 1821.50 11195.65
1951 1929.00 1450.50 1490.00 877.76 a 311.00 234.00 80.50 145.00 393.10 a 699.00 1350.50 1776.82 a 10737.18
1952 1883.50 1323.00 1394.00 651.50 418.50 102.00 53.00 109.00 236.50 770.00 1064.50 1417.73 a 9423.23
1953 1692.00 1443.50 1208.50 879.50 418.50 134.00 64.50 34.00 309.00 425.50 923.50 1573.77 a 9106.27
1954 2022.50 1108.00 1373.50 807.00 554.50 118.50 38.50 91.00 331.50 662.00 945.52 a 1390.00 9442.52
1955 1783.00 1594.50 1522.50 532.50 261.50 120.00 a 17.50 32.00 296.50 561.50 1367.00 1848.50 9937.00
1956 1729.50 1631.50 1399.50 924.50 455.00 47.50 86.00 79.50 396.00 447.00 1040.50 1513.32 a 9749.82
1957 2039.50 1531.00 1322.50 767.50 392.50 168.00 7.75 a 86.50 361.50 616.90 a 1087.00 1431.50 9812.15
1958 1479.50 1514.00 1150.00 658.00 357.50 275.00 86.00 100.00 275.50 583.00 1095.00 1806.27 a 9379.77
1959 1975.50 1560.00 1197.50 738.62 a 376.00 112.00 43.50 36.00 297.00 789.50 1417.00 1312.33 a 9854.95
1960 1765.00 1548.00 1521.00 766.50 393.50 163.50 44.50 34.00 263.79 a 582.00 1058.28 a 1680.50 9820.57
1961 1816.50 1238.00 990.50 906.00 426.00 79.00 34.00 17.00 305.00 546.00 1084.00 1683.00 9125.00
1962 1945.50 1600.50 1217.50 813.00 332.50 98.50 59.50 59.00 352.00 550.00 974.50 1578.00 9580.50
1963 2063.50 1619.50 1096.50 696.00 431.00 85.00 20.50 56.00 200.50 324.50 991.00 1867.50 9451.50
1964 1677.50 1511.00 1486.00 754.00 311.00 170.50 25.50 185.50 365.50 650.00 1089.50 1861.00 10087.00
1965 1958.50 1651.00 1645.00 790.00 402.00 119.50 48.00 99.50 549.50 623.50 1190.00 1426.50 10503.00
1966 2259.50 1635.00 1168.00 952.00 550.50 154.00 8.00 125.00 307.00 662.00 1261.00 1650.00 10732.00
1967 1777.00 1749.00 1262.50 811.00 598.00 154.00 67.00 104.88 a 250.00 713.00 1139.50 1590.50 10216.38
1968 1804.00 1658.00 1026.50 697.00 435.50 116.00 73.00 93.00 258.21 b 587.50 1070.50 1737.00 9556.21
1969 1958.00 1425.50 1383.50 647.59 a 364.50 265.50 44.50 22.50 252.50 799.00 1090.00 1502.98 a 9756.07
1970 1946.50 1521.00 1469.50 807.50 445.00 81.96 b 16.50 47.50 270.50 643.50 1181.00 1784.50 10214.96
1971 2072.00 1499.50 1309.00 708.50 429.41 d 42.50 87.50 77.50 a 274.50 538.50 1103.50 1612.00 a 9754.41
1972 1981.00 1738.00 1298.50 838.00 261.50 107.59 a 74.50 90.00 379.50 777.50 1205.00 1902.00 10653.09
1973 1684.00 1463.50 901.50 725.50 367.50 88.00 41.50 15.00 304.50 448.00 1129.50 1656.00 8824.50
1974 1870.00 1456.00 1363.00 731.50 475.33 a 119.00 9.00 114.00 402.50 589.50 1074.00 1401.00 9604.83
1975 1728.50 1501.50 1402.50 931.50 294.00 136.00 32.00 64.50 352.00 546.00 1051.50 1639.50 9679.50
1976 1847.00 1260.50 1285.50 569.50 354.00 63.50 26.50 41.50 254.50 789.50 1303.00 1889.50 9684.50
1977 2086.62 b 1344.50 1024.50 529.00 95.50 71.00 15.00 155.00 288.00 602.00 1190.50 1815.50 9217.12
1978 1993.50 1645.50 1221.00 743.00 263.00 132.50 40.00 67.50 246.00 602.50 1239.00 1784.00 9977.50
1979 2125.00 1744.00 1279.00 886.00 549.00 132.50 28.00 100.00 207.00 705.00 1146.00 1382.50 10284.00
1980 1845.00 1608.50 1372.50 590.50 246.45 a 105.00 17.00 53.00 336.43 b 728.50 1003.00 1645.50 9551.38
1981 1631.00 1278.50 1006.00 623.00 337.90 a 100.00 32.00 36.00 299.50 660.50 898.93 b 1638.50 8541.83
1982 2200.00 1483.00 1330.00 801.00 301.22 a 294.50 31.50 101.78 a 347.00 649.00 1239.00 1448.00 10226.00
1983 1678.28 b 1297.00 1133.50 797.50 504.50 151.03 a 24.00 10.50 318.62 a 675.50 1065.50 2107.50 9763.43
1984 1862.50 1202.50 1437.50 659.50 467.50 91.50 38.50 38.00 445.50 575.64 b 1149.50 1757.50 9725.64
1985 1934.00 1707.00 1115.50 646.55 a 276.50 262.00 60.50 146.00 392.59 a 723.50 1436.38 a 1946.00 10646.52
1986 1676.58 a 1557.63 a 1134.00 681.50 359.00 123.00 19.50 144.00 357.00 658.50 1298.00 1483.00 9491.71
1987 1590.50 1094.50 1080.50 520.50 277.00 78.50 31.00 112.00 257.00 798.00 981.50 1437.50 8258.50
1988 2062.00 1851.00 1287.50 760.00 187.50 52.00 26.50 73.50 332.07 a 817.00 1183.50 1696.50 10329.07
1989 1724.00 1846.50 1460.00 857.00 356.50 170.00 4.50 70.50 326.50 680.00 1331.50 1981.00 10808.00
1990 1521.50 1567.00 1214.00 797.00 458.50 90.50 37.00 49.50 251.00 738.50 1052.50 1744.00 9521.00
1991 1918.00 1339.00 1205.00 664.00 306.50 44.00 44.00 44.50 352.50 797.00 1368.00 1618.00 9700.50
1992 1565.00 1347.50 1179.00 868.50 342.00 208.50 183.50 160.00 380.00 751.50 1216.50 1748.00 9950.00
1993 1880.50 1582.50 1303.00 816.50 432.50 238.00 93.00 89.50 481.00 798.50 1318.50 1631.50 10665.00
1994 2222.50 1778.00 1174.50 799.00 370.50 93.00 53.00 109.00 231.00 570.00 1017.00 1382.60 a 9800.10
1995 1782.50 1630.50 1227.00 939.50 423.00 81.00 47.00 26.50 327.50 726.50 1413.50 1767.00 10391.50
1996 2138.50 1673.00 1608.50 991.50 456.00 126.50 56.00 46.00 322.50 708.50 1433.50 1833.50 11394.00
1997 2007.00 1499.50 1379.50 909.50 564.50 61.50 74.00 111.50 203.50 683.50 1284.50 1306.50 10085.00
1998 1717.00 1037.00 1249.50 631.00 224.00 202.00 35.00 19.00 194.50 635.00 1098.00 1535.00 8577.00
1999 1883.50 1315.50 1210.00 722.07 a 348.75 a 122.59 a 28.50 67.68 a 352.00 764.31 b 902.50 1419.50 9136.90
2000 1799.03 a 0.00 z 0.00 z 783.00 361.50 209.50 47.00 49.50 349.50 617.50 1127.00 2028.50 7372.03
2001 1553.00 1723.00 1359.35 a 750.50 329.00 140.50 44.43 a 43.40 a 306.50 724.50 811.50 1405.50 9191.18
2002 1579.50 1243.00 1557.00 870.00 583.00 100.50 20.50 55.00 247.50 923.00 1232.00 1433.50 9844.50
2003 0.00 z 1670.50 0.00 z 0.00 z 380.00 127.00 37.00 26.50 309.50 634.50 1289.50 1459.00 5933.50
2004 2016.50 1512.00 1213.00 741.00 521.00 227.00 93.00 217.50 179.00 640.00 1002.50 1627.00 9989.50
2005 1944.00 1374.50 1333.00 603.50 457.00 54.00 57.50 95.00 205.50 612.00 1068.00 1535.50 9339.50
2006 1346.50 1634.50 1207.00 571.00 369.00 88.50 8.00 38.00 318.50 801.00 1091.50 1352.00 8825.50
2007 1669.50 1695.00 1128.00 839.00 323.00 86.00 27.50 88.00 324.00 595.00 1119.50 1755.00 9649.50
2008 1877.50 1707.00 1413.00 902.00 532.50 167.00 39.50 50.00 283.00 666.50 1097.07 a 1933.50 10668.57
2009 2091.50 0.00 z 0.00 z 0.00 z 474.00 133.50 g 0.00 z 0.00 z 0.00 z 865.00 899.00 1681.75 a 6011.25
2010 1792.00 1528.00 958.00 542.00 372.00 145.00 15.50 57.00 389.00 556.00 1142.00 1715.50 9212.00
2011 1956.00 1513.00 1400.00 793.50 474.41 c 170.17 a 13.00 15.00 i 298.50 524.00 1045.86 a 1381.05 a 9569.50
2012 1570.50 1367.50 880.92 a 651.00 320.16 b 81.43 b 3.00 h 69.75 a 321.50 757.50 1138.45 a 1587.20 a 8745.90
2013 1771.00 1589.00 1108.00 h 47.00 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 3360.00
Period of Record Statistics
MEAN 1856.13 1543.43 1293.93 759.36 400.30 143.07 49.30 87.07 313.86 664.90 1139.45 1639.86 9871.14
S.D. 213.04 193.22 171.97 121.63 107.06 65.50 35.57 49.23 70.81 123.65 143.29 189.32 645.95
SKEW 0.00 -0.14 -0.25 -0.05 0.01 0.63 1.80 0.95 0.56 0.30 0.16 0.16 0.12
MAX 2353.50 2155.50 1665.50 1072.50 695.00 310.00 205.50 264.00 549.50 1048.50 1436.38 2107.50 11394.00
MIN 1346.50 1037.00 880.92 472.50 95.50 35.89 0.50 10.50 179.00 324.50 811.50 1292.00 8258.50
NO YRS 98 98 95 98 101 101 100 97 99 100 100 99 84