date! ,

Monthly Total Heating Degree Days

(a vali)

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
1973 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 1601.67 a 1601.67
1974 1774.50 1413.00 1224.50 636.50 408.17 a 63.50 0.00 59.93 a 298.50 495.48 a 974.00 1323.00 8671.08
1975 1610.00 1525.00 1401.50 883.00 267.00 92.00 10.50 18.00 280.00 494.00 958.50 1488.50 9028.00
1976 0.00 z 1119.50 1112.50 480.52 a 282.50 34.50 0.00 2.50 203.79 a 696.00 1180.34 a 1615.50 6727.65
1977 2043.93 a 1189.00 985.50 417.00 60.00 17.07 a 9.50 55.00 168.50 523.00 0.00 z 1648.00 7116.50
1978 1991.23 a 1618.00 1214.00 679.50 234.50 72.00 17.50 19.00 151.50 522.00 1109.00 1587.50 9215.73
1979 2064.50 1770.50 1318.00 814.50 438.00 77.50 8.00 56.00 122.50 580.00 1063.50 1249.00 9562.00
1980 1604.00 1460.50 1275.00 491.00 212.35 a 31.50 1.00 22.73 a 198.50 619.47 b 831.50 752.50 o 6747.55
1981 1506.00 1148.00 a 862.32 a 443.50 248.00 31.50 8.00 10.00 150.00 562.00 802.50 1597.00 7368.82
1982 2125.05 a 1484.50 1159.00 673.50 179.00 127.50 2.50 35.50 191.00 543.00 1108.00 1261.18 a 8889.73
1983 1411.03 b 1129.00 1052.50 708.50 358.50 69.00 3.00 0.00 206.00 528.50 972.00 1982.97 a 8421.00
1984 1555.50 1070.50 1308.50 590.00 317.00 33.50 11.00 13.50 288.50 495.50 987.00 1577.90 a 8248.40
1985 1767.00 1446.00 913.00 477.00 147.50 129.50 3.50 49.00 268.50 601.00 1349.00 1839.33 a 8990.33
1986 1475.50 1500.07 a 971.85 a 574.00 255.50 38.00 4.50 46.50 227.50 534.50 1125.50 1193.00 7946.42
1987 1297.50 948.50 971.50 356.50 90.93 a 24.50 3.00 39.00 120.52 a 651.00 889.14 a 1245.00 6637.09
1988 1660.80 d 1478.50 960.48 a 468.62 a 69.00 2.00 3.50 23.00 169.00 610.50 1024.50 1398.74 b 7868.64
1989 1444.08 a 1606.77 b 1243.50 611.00 192.50 68.50 0.00 3.50 175.00 502.50 1104.50 1726.00 8677.85
1990 1224.00 1185.33 a 961.50 607.00 289.00 55.50 12.00 25.00 153.00 606.50 899.00 1579.00 7596.83
1991 1697.50 1133.50 1068.50 505.50 222.00 20.00 6.50 7.00 245.00 640.50 1221.50 1348.50 8116.00
1992 1355.50 1124.00 935.50 723.00 219.50 96.50 78.00 88.00 234.00 589.50 1114.00 1585.50 8143.00
1993 1744.50 1461.50 1173.50 675.50 283.50 137.50 23.50 19.50 340.00 663.00 1150.00 1481.00 9153.00
1994 2036.50 1644.50 999.00 617.50 186.00 29.00 15.50 51.00 156.00 445.00 848.00 1333.50 8361.50
1995 1619.00 1367.00 1146.00 770.50 310.50 48.50 19.50 6.50 248.00 617.50 1198.00 1522.00 8873.00
1996 1915.00 1444.50 1378.00 756.50 351.33 a 50.50 7.00 4.50 228.50 567.00 1392.00 1783.50 9878.33
1997 1860.50 1355.50 1246.00 731.00 342.00 7.00 28.00 40.00 120.50 484.00 1152.00 1197.00 8563.50
1998 1592.50 1056.00 1143.38 a 0.00 z 129.50 111.50 4.50 2.00 91.50 488.50 940.00 1288.00 6847.38
1999 1745.00 1084.00 959.50 615.52 a 236.50 80.50 3.50 17.00 247.00 615.00 784.00 1248.00 7635.52
2000 1654.50 1210.50 872.00 684.50 227.00 93.50 30.50 24.50 229.50 495.50 1125.00 1880.50 8527.50
2001 1476.12 a 1687.50 1288.50 672.00 208.00 63.00 8.50 16.00 213.00 602.50 688.00 1320.50 8243.62
2002 1410.50 1069.00 1410.00 709.50 427.00 29.00 5.00 28.50 181.00 796.50 1012.00 1315.50 8393.50
2003 1628.00 1497.50 1190.00 573.50 322.00 74.00 0.00 13.00 251.50 484.50 1128.00 1356.85 e 8518.85
2004 1742.50 1307.00 954.50 571.00 362.50 111.00 33.50 100.50 141.00 532.50 931.00 1350.50 8137.50
2005 1740.00 1207.00 1104.50 510.50 335.50 13.50 15.00 34.00 121.00 521.00 912.78 c 1458.50 7973.28
2006 1250.50 1402.00 1093.50 485.00 265.00 49.00 2.50 k 11.92 e 283.50 665.00 1004.50 1216.00 7725.92
2007 1503.00 1554.00 1008.00 733.50 218.50 40.50 7.15 e 56.00 166.00 g 383.50 f 971.40 e 1655.63 d 7747.68
2008 1753.00 1620.50 1231.50 774.60 e 213.50 m 80.50 9.00 i 13.50 206.00 579.00 996.50 1769.00 9024.10
2009 1894.50 1432.00 1288.50 718.50 327.00 127.00 f 31.50 62.50 97.50 780.00 800.00 1667.05 b 9099.05
2010 1749.00 1552.00 1005.50 441.50 341.00 37.50 2.50 16.00 261.00 476.50 1049.50 1663.50 8595.50
2011 1882.50 1515.23 b 1409.98 a 684.00 386.50 76.50 1.60 b 4.50 230.00 460.50 959.48 a 1245.17 a 8855.97
2012 1399.65 a 1237.00 793.60 a 544.50 212.87 a 44.00 f 0.00 49.17 b 242.14 b 661.50 988.89 c 1537.71 b 7667.03
2013 1244.00 h 1102.00 f 1502.43 b 42.00 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 1502.43
Period of Record Statistics
MEAN 1663.27 1360.37 1128.43 616.03 262.19 59.91 11.32 29.33 203.68 571.84 1019.59 1490.68 8436.38
S.D. 233.59 210.49 176.32 123.43 93.98 35.64 14.74 24.11 60.80 83.47 151.45 210.60 662.39
SKEW 0.09 -0.10 0.17 -0.08 -0.22 0.46 2.77 1.03 0.02 0.80 0.22 0.37 -0.33
MAX 2125.05 1770.50 1502.43 883.00 438.00 137.50 78.00 100.50 340.00 796.50 1392.00 1982.97 9878.33
MIN 1224.00 948.50 793.60 356.50 60.00 2.00 0.00 0.00 91.50 445.00 688.00 1193.00 6637.09
NO YRS 38 39 40 38 38 37 37 39 38 38 38 39 30