ONTONAGON 6 SE, MICHIGAN

Monthly Total Heating Degree Days

(206220)

Base Temperature = 65 F

File last updated on Oct 29, 2012
*** Note *** Provisional Data *** After Year/Month 201210
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
1977 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 587.50 931.00 1374.33 a 2892.83
1978 1597.00 1491.00 1255.50 759.00 343.00 150.50 83.00 55.91 c 198.00 560.00 994.50 1485.50 8972.91
1979 1818.50 1605.00 1196.50 809.00 521.50 184.00 73.50 65.88 c 234.50 685.50 983.50 1240.00 a 9417.38
1980 1526.50 1470.50 1277.00 676.50 301.50 196.00 39.00 46.00 299.50 685.50 931.00 1435.50 8884.50
1981 1483.00 1204.00 1059.50 631.00 446.50 108.00 54.00 34.00 307.00 639.50 786.50 1313.00 8066.00
1982 1794.00 1405.50 1211.50 809.50 242.00 265.50 35.50 142.50 283.00 509.50 1011.50 1202.00 8912.00
1983 1370.50 1091.50 1075.50 858.10 a 523.50 156.50 24.50 12.00 209.50 579.00 906.50 1663.50 8470.60
1984 1618.00 1082.50 1354.00 640.00 436.00 82.50 65.00 25.00 321.00 438.00 909.50 1416.38 b 8387.88
1985 1606.83 a 1444.50 992.50 612.00 315.00 199.00 71.00 113.50 276.00 530.50 1110.00 1590.50 8861.33
1986 1456.00 1358.50 1081.00 571.00 295.02 a 146.50 39.50 102.00 265.50 567.50 1088.50 1277.50 8248.52
1987 1313.00 1052.50 923.50 527.00 303.00 86.00 29.50 66.00 213.00 689.00 867.00 1167.50 7237.00
1988 1593.50 1503.50 1168.50 650.00 234.00 122.50 26.00 61.00 202.50 698.50 930.00 1400.00 8590.00
1989 1335.00 1484.50 1327.00 756.00 364.00 201.00 33.50 51.50 197.00 548.50 1114.00 1659.50 9071.50
1990 1261.00 1258.50 1011.50 634.00 495.50 122.50 69.00 67.50 244.00 635.00 858.50 1380.50 8037.50
1991 1582.00 1202.50 1083.50 564.50 271.50 90.00 57.50 61.00 310.00 646.00 1105.50 1333.50 8307.50
1992 1381.00 1221.50 1177.00 775.00 297.00 249.00 161.50 160.00 225.00 609.50 1006.00 1315.00 8577.50
1993 1444.00 1344.00 1169.50 807.50 413.00 211.50 47.50 55.00 381.00 649.00 1073.00 1300.00 8895.00
1994 1836.00 1525.00 1068.00 751.50 388.50 116.50 46.50 0.00 z 191.00 438.00 839.00 1147.50 8347.50
1995 1376.50 1291.50 1036.50 872.00 383.50 95.50 46.50 14.50 287.00 558.50 1166.50 1445.50 8574.00
1996 1665.50 1497.00 1379.50 919.00 487.50 119.50 128.50 51.00 266.00 524.50 1098.00 1371.50 9507.50
1997 1571.00 1317.00 1254.50 791.00 569.00 74.50 81.00 141.00 197.00 542.00 1020.00 1153.50 8711.50
1998 1373.00 914.50 1080.50 587.00 270.00 174.00 46.50 16.50 140.00 453.00 853.00 1230.00 7138.00
1999 0.00 z 1097.50 1047.00 662.50 298.50 134.50 26.50 64.50 244.50 626.00 735.50 1236.50 6173.50
2000 1508.00 1147.50 840.00 764.50 314.50 162.50 68.50 41.50 266.00 456.00 905.00 1600.50 8074.50
2001 1313.50 1361.50 1194.00 607.50 282.50 142.50 61.50 29.50 267.50 564.00 654.00 1110.00 7588.00
2002 1280.50 1077.50 1348.00 749.00 514.00 133.50 18.00 42.00 0.00 z 732.00 1036.00 1229.50 8160.00
2003 1532.50 1474.00 0.00 z 770.50 397.00 161.50 55.00 36.50 205.00 599.00 966.00 1205.00 7402.00
2004 1663.50 1215.00 1037.00 725.00 462.00 197.50 78.00 0.00 z 93.50 497.00 872.50 1389.00 8230.00
2005 1570.50 1133.50 1194.50 558.00 396.00 46.50 41.00 32.00 100.00 489.50 909.00 1307.50 7778.00
2006 1145.50 1294.50 1068.50 501.50 370.50 108.50 11.50 30.50 279.00 663.00 839.50 1154.50 7467.00
2007 1361.00 1449.00 973.50 728.50 222.00 83.50 58.00 36.50 182.00 417.50 954.00 1387.50 7853.00
2008 1440.00 1439.00 1263.00 715.50 512.00 134.00 34.50 68.00 179.50 540.50 920.50 1528.00 8774.50
2009 1735.00 1303.50 1115.00 719.00 375.00 189.50 135.50 115.00 117.00 700.50 731.50 1406.50 8643.00
2010 1387.50 1253.50 833.00 503.00 285.50 143.50 5.50 21.50 321.00 504.00 870.00 1346.50 7474.50
2011 1565.00 1217.50 1163.00 696.50 379.75 c 139.00 21.38 b 22.00 242.00 451.00 848.50 1181.50 7927.13
2012 1322.50 1125.00 657.09 c 656.38 a 242.00 79.44 c 3.62 a 61.00 289.00 373.00 k 0.00 z 0.00 z 4436.03
Period of Record Statistics
MEAN 1494.91 1295.81 1115.18 695.94 370.05 143.06 53.63 58.86 236.28 571.83 937.86 1342.42 8360.27
S.D. 168.62 167.31 158.65 106.50 96.85 50.68 34.82 38.34 65.86 87.61 119.61 147.58 625.95
SKEW 0.22 -0.17 -0.65 -0.04 0.35 0.40 1.28 1.17 -0.31 0.00 -0.15 0.52 -0.23
MAX 1836.00 1605.00 1379.50 919.00 569.00 265.50 161.50 160.00 381.00 732.00 1166.50 1663.50 9507.50
MIN 1145.50 914.50 657.09 501.50 222.00 46.50 3.62 12.00 93.50 417.50 654.00 1110.00 7138.00
NO YRS 34 35 34 35 35 35 35 33 34 35 35 35 29