IRON MTN KINGSFORD WWTP, MICHIGAN

Monthly Total Heating Degree Days

(204090)

Base Temperature = 65 F

File last updated on Oct 29, 2012
*** Note *** Provisional Data *** After Year/Month 201209
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
1899 0.00 z 1572.00 1492.00 628.50 367.50 116.00 30.00 43.00 386.50 487.00 781.00 1407.00 7310.50
1900 1384.50 1569.00 1383.50 528.50 331.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5196.50
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 222.00 i 533.00 1074.00 1492.43 c 3099.43
1902 1514.50 1312.89 a 928.97 a 694.66 a 362.00 214.62 d 31.50 131.48 b 322.76 a 636.00 912.32 b 1418.50 8480.19
1903 1573.00 1352.50 949.12 a 730.50 354.00 161.00 56.00 160.50 269.00 571.50 1119.00 1622.50 8918.62
1904 1739.00 1765.00 1250.50 862.00 363.22 a 124.50 436.67 b 556.00 666.00 652.00 904.00 1487.00 10805.89
1905 1723.50 1502.00 1150.50 755.00 445.50 157.50 70.00 47.50 188.00 655.00 991.55 a 1292.18 a 8978.24
1906 1329.00 1410.50 1436.00 605.00 456.00 117.00 46.00 54.00 162.00 626.00 960.00 c 1317.50 e 8519.00
1907 1665.00 1414.00 1103.00 1001.50 644.80 a 103.00 22.00 80.50 252.50 661.33 a 1005.50 1287.00 9240.13
1908 1398.50 1370.00 1182.50 679.00 351.50 120.00 e 27.38 a 62.50 119.00 494.89 c 932.50 1436.00 8173.78
1909 1473.50 1254.00 1214.50 904.00 320.52 c 64.29 b 26.00 44.29 c 225.50 627.20 c 850.86 a 1080.00 f 7004.65
1910 1551.19 e 1438.00 763.63 a 500.50 f 455.70 a 83.50 j 0.00 r 63.50 228.50 437.62 a 1045.34 a 1420.66 b 7404.14
1911 1521.00 1177.00 832.00 g 649.82 b 231.98 a 33.00 47.00 85.50 250.00 630.00 1080.00 1175.50 6880.80
1912 2074.00 1523.00 1310.00 661.50 347.50 143.50 53.00 149.00 235.50 519.50 928.50 1275.13 a 9220.13
1913 1507.12 a 1537.00 1301.50 613.50 385.00 78.00 48.57 a 36.50 282.93 a 600.50 779.50 1025.07 a 8195.18
1914 1340.50 1538.00 1166.00 774.50 254.00 155.50 11.50 78.02 a 242.07 a 406.32 c 984.00 1509.00 8459.41
1915 1614.50 1129.00 1166.00 442.00 463.50 218.50 64.58 a 162.00 213.00 538.00 926.00 1332.50 8269.58
1916 1537.50 1502.50 1325.00 727.50 371.50 183.50 0.50 57.50 275.50 581.00 1004.00 1505.64 b 9071.64
1917 1692.50 1637.50 1209.52 a 833.00 511.50 193.00 51.50 131.50 283.50 838.00 895.00 1633.50 9910.02
1918 1852.00 1468.00 950.00 748.00 302.00 130.00 58.00 34.50 387.00 530.00 867.00 1218.54 e 8545.04
1919 1379.50 c 1251.50 1134.00 681.50 392.00 28.00 10.00 67.50 208.00 661.50 859.00 f 1696.50 7510.00
1920 1786.00 1467.50 1141.00 868.00 417.00 88.00 50.50 60.00 123.00 287.50 0.00 z 1087.50 7376.00
1921 1365.00 1263.50 1172.00 404.50 241.00 28.00 2.50 41.50 124.00 546.50 1119.50 1400.50 7708.50
1922 1615.50 1428.00 1148.50 731.50 154.50 87.50 48.00 73.00 169.50 576.00 867.00 1419.11 d 8318.11
1923 1527.50 1540.00 1399.00 778.00 341.50 62.00 7.50 106.50 212.50 618.50 861.50 1099.00 8553.50
1924 1833.81 b 1292.50 1155.00 750.00 585.00 160.50 85.50 121.00 330.50 397.00 949.00 1625.50 9285.31
1925 1542.50 1251.00 1067.50 529.00 470.00 100.50 57.50 29.50 168.00 836.00 997.50 1398.00 8447.00
1926 1458.00 1288.50 1342.50 815.00 319.00 190.00 38.50 68.50 330.00 680.50 1140.00 1549.50 9220.00
1927 1623.00 1261.50 968.00 688.00 494.50 208.00 80.50 133.00 168.00 480.50 985.00 1496.50 8586.50
1928 1404.50 1380.50 1192.00 849.00 314.00 187.50 37.00 75.00 447.00 561.50 914.50 1260.50 8623.00
1929 1842.50 1534.00 1040.00 652.50 484.00 190.50 44.00 90.50 266.50 565.00 1085.00 1452.50 9247.00
1930 1695.50 1198.50 1158.50 651.50 316.00 79.00 54.77 a 40.00 212.50 606.50 875.17 a 1349.00 8236.94
1931 1336.00 1045.50 1122.50 640.50 359.50 96.50 33.58 a 110.50 121.00 430.00 772.50 0.00 z 6068.08
1932 933.00 i 1288.50 1340.00 749.50 354.50 50.00 40.50 49.50 241.50 669.50 1096.00 1436.00 7315.50
1933 1325.00 1443.50 1249.00 759.00 319.50 40.50 25.00 50.50 125.50 676.50 1137.50 1514.50 8666.00
1934 1327.50 1516.00 1343.00 788.50 230.00 71.00 40.50 155.00 266.00 499.00 906.00 1510.00 8652.50
1935 1639.00 1338.00 1149.00 764.50 490.50 206.00 5.50 116.00 331.50 580.00 1056.00 1429.10 a 9105.10
1936 1654.50 1786.50 1152.00 886.00 274.00 147.00 36.50 75.50 172.00 670.24 b 1107.00 1317.50 9278.74
1937 1646.50 1355.50 1326.00 815.00 353.00 133.50 46.50 51.50 350.00 616.50 844.50 1465.50 9004.00
1938 1637.00 1238.50 993.50 648.50 331.00 129.50 35.00 50.00 283.50 480.00 971.50 1401.00 8199.00
1939 1472.00 1515.50 1280.00 822.00 308.50 107.50 43.00 47.50 267.00 608.00 934.00 1170.00 8575.00
1940 1637.50 1328.50 1384.50 860.00 456.00 127.50 70.50 121.50 212.50 529.50 1003.00 1311.00 9042.00
1941 1469.50 1303.00 1296.00 546.50 246.50 90.50 75.50 106.50 206.50 584.50 912.00 1191.50 8028.50
1942 1460.00 1345.50 1061.00 529.50 414.50 135.50 84.00 84.00 345.00 573.00 1018.50 1507.00 8557.50
1943 1668.50 1333.50 1392.50 820.50 409.00 115.00 10.50 67.50 401.00 601.00 1088.79 a 1367.50 9275.29
1944 1254.00 1314.50 1316.50 837.00 293.00 134.50 35.50 88.50 261.21 a 583.50 843.50 1440.50 8402.21
1945 1660.05 a 1341.00 870.00 721.50 549.00 239.00 102.00 89.50 320.50 675.50 1031.00 1514.00 9113.05
1946 1516.42 a 1407.00 845.00 671.50 423.00 175.00 55.00 136.50 296.50 477.50 946.50 1403.00 8352.92
1947 1449.00 1362.00 1220.00 826.00 521.50 191.50 41.50 34.00 257.50 291.50 1094.00 1387.00 8675.50
1948 1762.00 1455.00 1250.00 619.50 408.50 116.00 27.50 54.00 169.50 606.00 891.00 1369.50 8728.50
1949 1400.50 1332.50 1194.50 614.00 354.50 53.50 28.00 61.50 293.50 461.50 982.50 1397.50 8174.00
1950 1614.50 1380.50 1319.00 981.00 422.00 131.50 84.00 177.00 264.50 462.00 1129.50 1587.00 9552.50
1951 1648.50 155.00 x 1242.50 741.00 201.00 f 161.00 50.00 138.00 319.00 596.23 a 1192.50 1456.00 7544.73
1952 1529.50 1291.00 1262.50 590.69 a 368.50 90.50 31.00 75.50 255.00 768.00 920.00 1223.50 8405.69
1953 1397.50 1317.00 1122.50 796.50 358.00 101.50 53.00 50.00 273.50 437.50 829.50 1300.00 8036.50
1954 1596.00 1095.50 1274.00 710.50 556.00 97.50 54.00 96.50 323.00 614.50 895.00 1352.00 8664.50
1955 1580.50 1367.00 1278.50 520.50 266.00 99.00 12.00 40.00 276.50 538.50 1114.50 1546.50 8639.50
1956 1469.50 1391.50 1309.50 798.50 422.50 108.50 90.50 86.50 369.50 406.00 602.00 i 1355.00 7807.50
1957 1771.00 1302.50 1184.50 678.50 382.00 136.00 30.50 87.00 330.50 614.50 733.00 g 1356.50 7873.50
1958 1411.00 1403.50 1105.50 663.50 421.00 239.50 56.50 100.00 247.00 531.00 941.00 1691.00 8810.50
1959 1767.50 1471.50 1218.50 488.00 j 52.50 t 104.50 52.00 22.50 256.00 700.50 1241.50 1213.00 8047.50
1960 1504.00 1366.50 1438.00 688.50 390.50 157.50 74.00 72.50 286.00 586.50 901.50 1484.50 8950.00
1961 1607.50 1176.50 1085.50 799.50 459.00 136.50 47.02 a 62.50 271.50 513.00 968.50 1458.00 8585.02
1962 1681.50 1483.00 1137.50 742.00 272.00 137.50 75.00 77.50 352.00 537.00 970.00 1438.50 8903.50
1963 1832.50 1557.00 1140.00 661.00 409.00 121.00 42.50 112.50 278.50 308.00 811.00 1574.50 8847.50
1964 1382.50 1309.50 1212.00 667.00 244.50 152.50 34.00 156.00 308.50 598.00 871.50 1509.00 8445.00
1965 1628.50 1455.50 1328.50 794.00 267.00 152.00 100.50 110.00 370.50 547.00 977.00 1209.00 8939.50
1966 1703.50 1263.00 1043.00 792.00 509.00 89.50 14.00 99.50 267.50 616.00 1016.50 1371.50 8785.00
1967 1478.00 1522.50 1170.00 699.00 528.50 79.00 78.00 115.50 267.00 614.50 1070.50 1372.50 8995.00
1968 1580.00 1431.00 949.50 617.00 434.50 158.00 61.00 118.00 189.00 508.50 965.00 1406.00 8417.50
1969 1518.00 1294.50 1258.00 647.50 367.50 281.00 53.50 21.00 259.50 667.00 1006.00 1333.50 8707.00
1970 1715.00 1395.00 1245.00 660.00 398.00 97.00 35.50 66.00 250.00 508.00 973.50 1421.00 8764.00
1971 1732.50 1365.50 1281.00 740.50 447.00 75.50 82.00 105.00 225.50 388.00 966.00 1359.00 8767.50
1972 1747.00 1537.50 1316.50 869.50 274.50 152.50 77.00 72.00 303.50 700.50 1008.00 1530.00 9588.50
1973 1427.00 1291.50 904.50 726.00 469.50 86.50 21.00 40.50 288.50 414.00 963.00 1438.50 8070.50
1974 1591.50 1431.00 1199.00 665.50 466.00 176.50 25.50 69.50 399.50 600.50 925.00 1249.00 8798.50
1975 1512.00 1293.00 1280.50 868.00 235.00 109.50 40.50 67.00 356.50 496.50 833.50 1421.00 8513.00
1976 1653.50 1192.50 1183.00 606.00 406.50 41.00 29.50 87.00 296.00 735.50 1168.50 1713.00 9112.00
1977 1849.50 1292.50 965.50 545.00 155.00 142.00 31.00 126.50 253.00 590.00 985.00 1458.50 8393.50
1978 1629.00 1435.50 1229.50 805.00 295.50 141.50 63.50 46.00 204.00 589.50 992.50 1543.00 8974.50
1979 1798.50 1578.00 1177.00 820.50 456.00 132.00 30.00 86.50 212.50 684.50 1035.00 1238.00 9248.50
1980 1539.00 1453.00 1244.50 639.50 244.00 152.00 23.50 31.50 266.50 730.50 944.50 1476.00 8744.50
1981 1557.50 1202.50 1018.00 630.50 405.00 88.00 50.00 40.50 307.50 687.00 859.50 1365.00 8211.00
1982 1840.50 1382.50 1184.50 837.00 184.00 248.50 13.00 122.00 287.50 523.50 974.50 1241.00 8838.50
1983 1412.00 1098.50 1099.50 787.00 499.00 137.00 16.50 23.50 235.00 622.07 a 944.46 b 1708.21 b 8582.74
1984 1784.00 1127.00 1311.62 b 621.21 a 461.50 49.00 35.13 a 26.50 322.00 508.83 b 1033.45 a 1435.50 8715.74
1985 1699.00 1453.50 1039.00 641.00 283.50 186.72 a 44.50 85.50 305.00 618.00 1156.00 1738.00 9249.72
1986 1630.50 1417.50 1151.00 566.00 282.00 144.00 31.50 127.00 255.00 640.50 1136.50 1333.00 8714.50
1987 0.00 z 1141.00 1026.50 554.00 312.00 77.00 35.00 72.50 221.50 777.50 943.00 1252.50 6412.50
1988 1723.00 1557.00 1191.00 700.50 284.00 99.00 24.00 52.50 258.00 781.50 954.50 1473.00 9098.00
1989 1464.00 1559.50 1383.00 795.50 379.00 158.00 22.00 56.50 266.50 580.00 1165.00 1794.50 9623.50
1990 1363.00 1354.00 1099.50 637.00 488.00 117.50 63.50 67.50 268.00 696.50 921.00 1457.00 8532.50
1991 1753.00 1262.00 1122.00 613.00 269.00 44.50 50.00 35.50 313.50 665.50 1116.00 1375.00 8619.00
1992 1441.00 1294.50 1181.00 777.50 0.00 z 169.00 115.00 129.50 290.00 638.50 1062.50 1382.50 8481.00
1993 1591.00 1371.00 1111.50 805.50 375.50 163.50 20.00 46.50 387.00 703.50 1093.50 1369.00 9037.50
1994 1923.50 1537.41 a 1087.50 722.00 365.00 90.50 39.50 99.50 185.50 520.50 886.50 1208.50 8665.91
1995 1457.52 a 1345.50 1080.50 879.50 400.00 67.50 31.50 8.50 302.00 560.00 1235.50 1558.00 8926.02
1996 1754.50 1543.50 1366.50 863.00 472.50 108.00 70.00 32.00 229.00 617.50 1125.50 1407.00 9589.00
1997 1643.50 1288.50 1232.00 774.50 564.50 63.50 69.50 129.00 195.00 600.50 1060.00 1168.50 8789.00
1998 1447.50 997.00 1103.50 586.00 173.00 158.50 17.00 16.00 141.50 533.00 867.00 1255.00 7295.00
1999 1668.00 1206.00 1089.50 620.50 267.00 114.00 18.00 52.50 253.00 686.00 794.00 1386.50 8155.00
2000 1650.00 1314.00 907.00 753.50 290.00 110.50 65.00 47.02 a 284.48 a 507.50 942.50 1670.50 8542.00
2001 1399.00 1406.50 1172.50 608.50 266.00 127.00 45.00 17.00 248.50 628.00 717.50 1160.50 7796.00
2002 1279.50 1125.50 1321.00 0.00 z 516.00 94.50 4.00 27.50 177.50 744.00 1065.00 1285.50 7640.00
2003 1617.50 1549.00 0.00 z 787.00 403.50 133.50 34.50 25.50 213.50 626.50 989.00 1262.50 7642.00
2004 1760.00 1364.00 1108.50 728.00 436.50 158.00 74.00 136.00 120.50 559.50 912.00 1449.00 8806.00
2005 1659.00 1175.50 1252.00 613.00 416.00 26.50 28.50 30.50 138.00 504.00 976.50 1397.00 8216.50
2006 1277.50 1362.00 1109.50 552.50 333.00 84.00 13.00 37.50 288.50 711.00 888.00 1216.00 7872.50
2007 1434.00 1477.00 1066.50 748.00 282.50 56.00 42.50 0.00 z 184.50 442.00 1005.00 1463.00 8201.00
2008 1514.00 1553.00 1286.50 722.00 434.00 86.00 13.00 40.50 186.50 361.50 k 982.50 1617.50 8435.50
2009 1852.50 1293.00 1177.00 738.50 402.50 161.50 86.00 94.00 125.00 736.50 796.50 1501.00 8964.00
2010 1465.50 1238.00 902.00 527.00 266.00 106.00 8.50 21.00 312.50 526.50 930.50 1435.00 7738.50
2011 1639.00 1301.00 1158.00 798.89 c 382.50 126.50 8.00 12.50 272.50 518.00 896.00 1279.00 8391.89
2012 1411.50 1141.50 726.00 663.00 235.00 68.00 2.00 42.50 22.00 z 0.00 z 0.00 z 0.00 z 4289.50
Period of Record Statistics
MEAN 1580.79 1368.40 1172.56 712.19 372.69 123.82 46.61 79.31 261.85 581.27 976.99 1405.01 8714.75
S.D. 160.32 142.95 144.83 110.32 98.00 50.90 44.62 60.16 79.26 105.13 106.60 146.38 507.36
SKEW 0.21 0.08 -0.55 -0.09 0.09 0.40 6.11 4.59 1.10 -0.26 0.19 0.12 0.57
MAX 2074.00 1786.50 1492.00 1001.50 644.80 281.00 436.67 556.00 666.00 838.00 1241.50 1794.50 10805.89
MIN 1254.00 997.00 726.00 404.50 154.50 26.50 0.50 8.50 119.00 287.50 717.50 1025.07 7295.00
NO YRS 110 112 111 110 110 111 111 111 111 111 108 110 93