date! ,

Monthly Total Heating Degree Days

(a vali)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201302
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
1984 0.00 z 0.00 z 0.00 z 0.00 z 319.00 66.11 c 19.63 a 17.50 319.50 562.65 a 1097.50 1729.80 a 4131.69
1985 1832.10 a 1553.50 983.22 a 532.00 144.50 160.00 10.50 77.00 333.00 653.00 1493.00 1510.50 g 7771.82
1986 1588.20 c 1545.19 a 1028.34 b 647.50 269.00 56.00 3.00 91.50 262.50 616.00 1299.83 a 1364.50 8771.55
1987 1411.02 a 1068.50 1084.00 464.50 199.00 51.72 a 17.50 72.50 0.00 z 730.50 926.00 1365.50 7390.74
1988 1889.00 1650.85 b 1068.35 d 625.50 131.23 a 13.00 6.20 a 30.00 216.50 683.00 1110.00 a 1488.00 d 8911.64
1989 1722.00 1770.00 1426.00 665.00 242.00 113.50 0.00 24.50 245.00 584.00 1243.50 1842.00 9877.50
1990 1325.50 1387.50 1045.50 696.00 342.50 77.00 13.00 31.00 164.50 643.00 1004.50 1670.50 8400.50
1991 1851.00 1242.50 1089.00 566.50 230.00 22.00 9.50 9.00 235.50 702.00 1308.00 1493.50 8758.50
1992 1531.50 1248.00 986.00 753.00 262.50 128.50 90.50 94.00 295.50 626.00 1164.00 1715.50 8895.00
1993 1885.50 1591.50 1276.00 685.00 324.00 160.00 59.50 31.50 357.00 699.50 1205.50 1582.50 9857.50
1994 2194.00 1787.50 1129.50 657.00 257.50 33.00 27.50 63.00 160.50 513.50 980.00 1431.00 9234.00
1995 1712.50 1458.00 1193.00 804.50 353.50 41.00 21.50 4.50 257.00 631.50 1308.00 1655.00 9440.00
1996 2043.00 1557.50 1455.50 836.50 402.50 56.00 14.50 11.00 238.50 628.00 1465.00 1862.00 10570.00
1997 2016.50 1477.78 a 1427.50 841.50 408.50 7.00 46.50 47.50 133.00 554.50 1226.50 1275.50 9462.28
1998 1709.50 1106.50 1183.50 542.00 156.50 126.00 4.50 1.50 129.50 557.00 1075.00 1436.00 8027.50
1999 1853.50 1219.00 1077.00 604.00 235.50 60.52 a 7.50 23.00 106.00 650.00 837.00 1291.00 7964.02
2000 1728.00 1313.29 a 903.50 703.50 227.85 a 119.00 28.50 20.67 a 238.00 541.50 1156.50 1935.00 8915.30
2001 1569.50 1697.00 1280.50 652.50 225.50 73.00 21.00 18.00 222.00 670.50 757.50 1413.50 8600.50
2002 1510.50 1156.00 1412.00 749.50 487.22 a 37.00 12.00 38.50 194.50 841.00 1091.00 1403.00 8932.22
2003 1702.00 1600.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 9.50 252.00 513.50 1228.00 1396.50 6702.00
2004 1935.50 1516.00 1077.00 624.00 390.00 109.50 59.50 123.00 164.00 597.00 913.50 1434.50 8943.50
2005 1876.00 1327.50 1163.00 500.00 358.50 19.50 25.50 0.00 z 0.00 z 523.50 975.00 1480.25 a 8248.75
2006 1323.50 1549.50 1232.50 460.00 274.50 31.00 6.00 11.00 262.00 694.00 1026.00 1287.00 8157.00
2007 1680.50 0.00 z 1086.00 723.50 211.00 37.00 6.50 65.00 231.00 489.00 1031.00 0.00 z 5560.50
2008 1861.00 1749.00 1333.50 745.00 355.00 109.00 11.00 21.50 0.00 z 588.50 1021.00 1882.00 9676.50
2009 2002.50 1527.50 1413.50 743.00 373.00 124.00 30.50 61.00 84.00 765.50 831.00 1731.00 9686.50
2010 1805.00 1606.00 992.50 443.50 309.50 56.00 1.00 17.00 285.00 481.50 1045.50 1750.50 8793.00
2011 1947.66 b 1555.50 1487.00 696.21 a 364.00 76.11 c 2.58 a 0.00 z 185.36 b 470.50 964.66 a 1291.50 9041.07
2012 1454.00 1299.50 0.00 z 532.24 a 207.91 b 34.00 0.00 28.00 238.45 a 680.50 1080.00 1583.50 7138.10
2013 1660.50 1549.00 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 3209.50
Period of Record Statistics
MEAN 1745.55 1468.22 1185.90 647.91 287.92 71.30 19.84 38.60 223.45 616.92 1098.76 1547.80 9009.90
S.D. 218.37 200.52 171.71 113.15 88.35 44.47 21.27 31.60 68.67 89.57 178.04 202.33 662.43
SKEW -0.22 -0.38 0.35 -0.19 0.15 0.50 1.77 1.03 -0.16 0.33 0.32 0.39 0.46
MAX 2194.00 1787.50 1487.00 841.50 487.22 160.00 90.50 123.00 357.00 841.00 1493.00 1935.00 10570.00
MIN 1323.50 1068.50 903.50 443.50 131.23 7.00 0.00 1.50 84.00 470.50 757.50 1275.50 7964.02
NO YRS 29 28 26 27 28 28 28 27 26 29 29 27 20