WILLMAR RTC, MINNESOTA

Monthly Total Heating Degree Days

(219004)

Base Temperature = 65 F

File last updated on Apr 6, 2013
*** Note *** Provisional Data *** After Year/Month 201202
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 0.00 z 0.00 z 1401.50 842.00 336.00 21.00 0.50 62.50 149.00 i 616.50 1119.50 1728.00 6127.50
1894 1859.50 1471.62 b 1039.02 a 555.00 285.00 22.00 2.50 12.00 229.00 601.50 1203.50 1320.50 8601.13
1895 1991.00 1622.00 1232.00 415.50 282.50 71.00 26.50 39.50 215.89 b 751.00 1132.00 1475.08 a 9253.98
1896 1669.50 1359.00 1336.50 619.50 197.00 58.00 22.00 65.50 307.00 697.50 1453.00 1384.00 9168.50
1897 1820.00 1436.81 a 1416.00 628.00 318.00 159.00 6.00 60.50 109.50 484.00 1157.00 1630.50 9225.31
1898 1390.00 1372.50 545.00 n 531.60 e 286.23 a 52.50 13.95 a 25.00 206.50 694.50 1178.50 1619.50 7370.78
1899 1676.00 1698.50 1560.50 639.31 a 313.00 40.00 c 3.50 23.50 276.50 520.00 803.50 1464.50 9018.81
1900 1446.50 1639.00 1325.25 e 440.50 210.00 66.00 10.00 0.00 218.40 e 297.50 1195.50 1456.00 8304.65
1901 1611.50 1524.50 1119.50 536.50 226.00 88.00 3.00 14.50 219.00 g 497.00 1091.00 1602.50 8314.00
1902 1492.50 1303.12 c 971.50 646.00 243.00 120.50 19.50 g 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4776.62
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1904 0.00 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
1905 0.00 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
1906 0.00 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
1907 0.00 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
1908 0.00 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
1909 0.00 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
1910 0.00 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
1911 0.00 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
1912 0.00 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
1913 0.00 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
1914 0.00 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
1915 0.00 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
1916 0.00 z 0.00 z 0.00 z 699.50 335.00 137.00 0.00 50.00 253.00 618.97 a 997.00 1730.32 a 4820.78
1917 1823.50 1714.50 1246.50 729.50 384.50 149.50 23.00 62.00 a 203.00 822.00 834.50 1762.50 9755.00
1918 1947.00 1371.00 825.50 655.50 215.50 64.50 20.00 23.00 324.50 477.00 882.00 1249.50 8055.00
1919 1391.50 1426.50 1114.50 601.00 296.00 58.50 0.00 26.00 125.00 711.50 1220.50 1713.50 8684.50
1920 1827.50 1445.00 1119.44 d 841.50 315.50 117.50 15.50 57.50 151.00 375.50 1069.50 1402.50 8737.94
1921 1432.50 1212.00 1024.50 535.00 289.50 43.50 7.00 52.00 184.00 530.50 1287.50 1445.00 8043.00
1922 1679.50 1687.50 1148.00 650.50 219.00 38.00 37.50 17.50 126.00 492.50 868.50 1559.50 8524.00
1923 1617.50 1627.50 1389.00 716.50 299.00 59.00 10.50 49.50 125.00 f 640.00 933.50 1260.00 8602.00
1924 1894.62 a 1314.50 1189.00 737.50 570.50 176.50 57.00 85.00 341.50 469.50 1081.00 1877.50 9794.12
1925 1760.80 a 1277.50 995.50 425.50 431.50 109.00 49.50 26.50 181.50 958.00 1103.50 1100.50 j 7318.80
1926 1559.50 1216.50 1209.00 674.00 224.50 158.00 23.50 11.50 293.50 625.00 1161.00 1630.50 8786.50
1927 1557.00 1279.00 977.00 595.50 391.50 123.00 28.50 67.00 226.00 467.00 1115.00 1864.00 8690.50
1928 1576.00 1289.00 1040.50 782.00 174.00 125.00 7.00 37.00 251.00 515.50 905.00 1267.00 7969.00
1929 2005.00 1603.50 1001.00 600.00 393.50 96.50 7.00 23.00 279.00 516.00 1141.50 1538.50 9204.50
1930 1888.00 1082.00 1064.50 509.50 256.00 63.50 21.18 a 5.50 197.00 615.50 927.50 1341.50 7971.68
1931 1268.00 991.50 1088.50 587.50 354.50 32.50 9.50 41.50 96.00 400.50 887.00 1258.00 7015.00
1932 1581.50 1342.29 a 1370.00 591.50 243.50 5.00 14.00 8.00 189.00 598.50 1116.50 1587.00 8646.79
1933 1412.50 1517.50 1106.50 697.00 315.68 a 14.00 0.50 22.50 75.00 609.50 1110.00 1594.00 8474.68
1934 1467.00 1298.50 1169.50 658.50 100.50 36.50 3.00 75.50 314.50 434.50 876.50 1616.00 8050.50
1935 1759.50 1103.50 1007.50 709.50 381.00 128.00 0.00 69.50 179.00 596.00 1219.50 1549.50 8702.50
1936 2072.00 2045.00 1161.50 794.50 146.00 71.50 1.00 14.50 128.50 629.50 1134.00 1429.00 9627.00
1937 2042.00 1538.00 1246.00 673.50 219.00 100.00 7.00 2.50 187.50 641.00 1072.50 1579.50 9308.50
1938 1728.00 1352.00 939.50 567.50 344.50 37.00 0.00 4.00 124.50 320.50 1056.50 1409.00 7883.00
1939 1467.00 1572.00 1109.50 666.50 132.50 39.50 10.00 22.50 170.00 584.00 862.00 1153.50 7789.00
1940 1890.00 1353.00 1313.00 672.50 281.50 45.00 9.00 83.50 129.50 357.00 1180.50 1397.50 8712.00
1941 1549.50 1478.50 1173.00 430.50 146.00 88.50 14.50 19.63 a 183.00 494.50 912.00 1275.00 7764.63
1942 1433.50 1306.00 949.50 431.50 355.50 99.50 17.50 25.50 294.50 508.00 988.00 1605.50 8014.50
1943 1944.73 a 1394.50 1333.50 590.50 372.00 77.50 1.00 16.50 251.50 509.00 1112.00 1322.50 8925.23
1944 1218.30 a 1374.00 1279.00 715.50 217.00 42.50 6.00 41.00 145.50 430.50 883.00 1410.50 7762.80
1945 1637.50 1384.00 836.50 658.50 397.00 176.00 24.00 11.00 253.97 a 542.50 1068.50 1745.50 8734.96
1946 1643.50 1410.00 818.00 444.00 351.00 91.50 2.00 43.00 200.50 530.50 1050.50 1464.00 8048.50
1947 1379.50 1487.00 1171.50 721.50 373.50 105.00 6.50 3.00 213.00 277.00 1220.50 1563.00 8521.00
1948 1821.00 1572.50 1277.50 494.50 247.50 34.00 1.50 17.50 94.50 470.50 998.50 1518.50 8548.00
1949 1694.50 1549.50 1147.00 571.00 165.50 30.50 2.00 19.50 236.00 474.00 868.00 1485.00 8242.50
1950 1936.00 1403.50 1304.00 899.00 349.00 54.00 10.00 65.50 117.50 422.50 1165.00 1711.00 9437.00
1951 1838.00 1352.00 1458.60 b 728.50 133.30 a 99.00 9.50 26.50 275.17 a 567.30 a 1235.00 1636.50 9359.38
1952 1756.50 1303.50 1350.50 547.00 223.00 26.50 1.00 17.00 157.50 637.50 932.59 a 1350.00 8302.59
1953 1579.00 1371.00 1094.00 730.50 282.50 56.00 5.50 4.65 a 147.50 309.00 854.50 1477.50 7911.65
1954 1846.05 a 998.00 1187.50 598.50 392.67 a 42.50 0.50 7.00 180.00 560.00 823.50 1334.00 7970.22
1955 1627.50 1493.50 1248.00 369.50 115.00 48.50 0.00 5.00 190.50 464.50 1255.50 1716.50 8534.00
1956 1734.50 1561.50 1262.00 738.00 257.50 12.50 5.00 32.50 225.50 306.00 987.50 1316.47 a 8438.97
1957 1781.00 1303.00 1132.50 619.50 300.50 48.50 0.00 22.50 131.50 f 529.58 a 429.00 p 992.50 g 5737.08
1958 1386.50 1454.00 1071.50 540.50 181.50 137.00 24.28 a 33.50 130.50 394.00 920.00 1579.50 7852.78
1959 1718.50 1391.00 964.50 594.00 221.50 32.50 4.50 1.00 174.50 682.50 1234.00 1141.50 8160.00
1960 1632.00 1458.50 1471.00 632.00 233.50 59.00 12.00 6.00 193.00 455.50 924.50 1474.00 8551.00
1961 1568.50 1132.50 936.00 776.00 316.00 24.00 0.50 3.50 222.00 451.00 982.00 1586.50 7998.50
1962 1723.50 1458.00 1247.50 696.00 190.00 67.00 18.50 1.00 216.50 397.00 836.00 1373.50 8224.50
1963 1846.50 1405.50 954.80 a 511.00 292.50 28.00 1.00 20.00 88.00 197.00 814.00 1671.50 7829.80
1964 1401.00 1193.50 1277.00 547.00 158.50 52.50 0.00 60.00 195.00 474.00 966.50 1655.00 7980.00
1965 1807.00 1539.00 1515.00 691.00 210.50 22.50 5.00 40.50 395.50 429.00 1005.50 1222.50 8883.00
1966 1989.00 1437.50 926.00 743.00 358.50 45.50 0.00 53.50 166.00 501.50 1113.00 1523.50 8857.00
1967 1597.00 1621.50 1123.50 617.50 405.00 47.00 31.00 32.00 141.50 548.00 993.00 1377.50 8534.50
1968 1609.50 1481.50 820.00 508.50 363.00 54.50 14.50 30.00 147.50 463.45 a 939.50 1545.00 7976.95
1969 1874.00 1355.50 1389.50 529.00 233.50 151.50 9.00 1.00 139.00 618.50 962.50 1475.50 8738.50
1970 1931.00 1423.00 1308.50 665.00 253.50 24.50 4.50 6.00 195.00 534.00 1040.00 1523.00 8908.00
1971 1860.50 1374.50 1156.50 549.50 286.00 24.00 35.50 25.50 175.50 413.50 996.50 1542.00 8439.50
1972 1834.00 1612.00 1193.00 705.00 212.50 50.50 17.00 39.00 192.50 605.50 1018.50 1681.00 9160.50
1973 1490.00 1216.50 815.50 614.00 268.50 21.50 3.50 3.00 201.00 323.50 944.00 1535.00 7436.00
1974 1703.00 1400.00 1147.00 545.00 348.50 50.50 0.00 52.00 236.00 432.50 953.50 1327.00 8195.00
1975 1620.00 1457.50 1366.00 826.00 174.50 54.50 7.00 13.50 231.00 442.50 929.50 1460.50 8582.50
1976 1711.00 1128.00 1092.50 448.50 239.00 15.50 4.50 16.00 189.50 688.00 1198.00 1689.50 8420.00
1977 2093.00 1222.50 957.50 372.50 64.50 16.50 3.00 31.00 141.00 523.00 1064.50 1620.50 8109.50
1978 1915.00 1551.50 1162.00 638.00 189.00 52.00 10.00 11.00 112.00 474.00 1065.00 624.50 u 7179.50
1979 0.00 z 0.00 z 1250.73 e 752.50 358.50 51.50 0.00 42.50 126.00 539.00 1025.50 1242.50 5388.73
1980 1567.50 1456.00 1205.00 475.50 171.50 28.50 0.00 16.50 179.00 595.50 859.50 1466.50 8021.00
1981 1495.50 1208.00 852.50 463.00 260.00 41.00 12.00 23.50 171.50 571.00 850.50 1592.00 7540.50
1982 2077.00 1444.00 1172.50 686.00 194.50 171.50 14.50 51.00 221.50 539.00 1181.00 1326.00 9078.50
1983 1524.00 1197.00 1038.00 724.00 359.00 84.00 7.50 0.00 207.00 571.00 977.00 2051.00 8739.50
1984 1714.00 1177.50 1327.00 576.00 331.50 22.50 9.50 19.50 337.50 481.00 983.50 1547.00 8526.50
1985 1811.50 1457.50 945.50 481.00 132.00 123.50 6.00 78.00 274.00 657.00 1321.00 1877.50 9164.50
1986 1556.50 1489.50 1047.50 527.00 240.00 30.50 5.50 55.50 216.00 527.00 1163.50 1303.00 8161.50
1987 1429.50 958.50 925.50 371.00 157.50 21.00 7.50 46.50 131.00 695.00 829.50 1352.00 6924.50
1988 1814.00 1610.50 1037.50 587.00 76.50 9.00 0.00 23.50 172.00 676.00 1059.00 1481.50 8546.50
1989 1463.00 1678.00 1295.00 672.00 269.00 73.50 0.00 11.00 206.00 528.00 1136.50 1758.00 9090.00
1990 1293.50 1285.00 1033.50 615.00 327.50 46.50 13.00 26.00 158.00 602.00 911.00 1619.00 7930.00
1991 1735.00 1191.00 1050.50 539.00 244.00 16.50 8.50 10.50 224.00 634.00 1260.00 1469.00 8382.00
1992 1415.00 1153.50 1016.00 741.50 201.50 80.50 61.50 78.50 219.00 602.50 1095.50 1524.00 8189.00
1993 1727.00 1480.00 1224.00 686.50 267.00 111.00 9.50 22.00 338.00 634.50 1131.00 1495.00 9125.50
1994 2027.50 1638.50 1071.00 646.50 207.00 29.50 9.50 53.00 135.00 484.00 897.50 1405.50 8604.50
1995 1589.00 1373.00 1068.00 773.00 311.50 47.00 15.50 4.00 236.50 606.00 1213.50 1505.00 8742.00
1996 1890.50 1513.00 1346.00 780.00 367.00 53.00 10.00 9.00 227.50 542.00 1298.50 1691.00 9727.50
1997 1853.00 1356.50 1249.00 738.00 394.50 5.50 30.50 29.50 121.00 500.00 1196.00 1274.00 8747.50
1998 1624.00 1030.50 1140.50 498.50 108.00 108.00 1.50 1.00 82.00 466.00 935.50 1297.00 7292.50
1999 1752.00 0.00 z 1031.50 571.00 205.50 80.50 1.50 17.50 239.00 564.00 754.50 1297.50 6514.50
2000 1664.50 1235.50 817.50 644.00 200.00 91.00 19.50 8.00 206.50 462.00 1076.50 1894.00 8319.00
2001 1544.00 1661.00 1307.00 626.50 204.00 64.00 11.50 4.50 191.00 565.00 653.00 1303.50 8135.00
2002 1385.00 1105.00 1499.50 698.50 401.50 33.00 0.50 20.00 163.50 781.50 1073.50 1307.00 8468.50
2003 1619.50 1501.00 1180.00 561.00 290.50 63.00 0.50 13.00 224.50 489.00 1120.50 1341.00 8403.50
2004 1730.50 1417.00 970.00 529.00 346.50 92.00 24.50 100.50 81.21 a 502.50 871.50 1390.50 8055.71
2005 1680.50 1192.00 1120.00 478.00 334.50 2.50 8.00 22.00 92.00 480.00 915.50 1516.00 7841.00
2006 1264.50 1437.00 1055.00 444.50 244.50 31.50 0.00 5.00 248.50 640.50 924.00 1205.00 7500.00
2007 1480.00 1548.00 979.00 650.00 159.50 14.00 4.00 29.00 178.00 439.00 988.50 1639.50 8108.50
2008 1746.50 1548.50 1244.00 719.00 327.50 46.50 1.50 7.00 167.00 551.50 982.00 1699.50 9040.50
2009 1903.50 1362.50 1153.00 628.00 265.00 92.50 31.00 34.00 78.00 747.50 752.00 1573.00 8620.00
2010 1719.50 1478.50 910.00 373.00 282.00 28.00 0.00 j 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4791.00
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
Period of Record Statistics
MEAN 1680.71 1399.26 1143.07 614.46 267.89 63.63 10.54 28.72 193.87 533.19 1030.07 1502.74 8455.65
S.D. 201.46 180.79 171.34 115.03 88.59 42.27 12.05 23.10 65.13 120.38 146.30 178.23 583.73
SKEW -0.07 0.04 0.12 -0.12 0.15 0.91 1.94 0.91 0.48 0.23 0.12 0.35 0.02
MAX 2093.00 2045.00 1560.50 899.00 570.50 176.50 61.50 100.50 395.50 958.00 1453.00 2051.00 9794.12
MIN 1218.30 958.50 815.50 369.50 64.50 2.50 0.00 0.00 75.00 197.00 653.00 1141.50 6924.50
NO YRS 102 101 103 105 105 105 103 103 99 103 102 100 93