date! ,

Monthly Total Heating Degree Days

(a vali)

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
1970 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 850.50 1293.00 2143.50
1971 1627.50 1260.50 1113.00 540.00 290.88 a 34.00 21.00 16.00 106.50 239.50 817.50 1161.50 7227.88
1972 1574.00 1368.50 1136.00 665.50 187.50 84.00 31.00 33.00 146.50 544.50 899.00 1409.50 8079.00
1973 1251.50 1133.00 728.50 590.50 336.50 13.50 0.00 10.00 162.50 295.50 846.00 1311.00 6678.50
1974 1427.50 1270.00 973.50 476.50 327.50 66.00 0.50 22.50 225.50 434.50 802.00 1177.50 7203.50
1975 1318.00 1211.00 1166.50 732.50 160.00 40.00 17.00 7.00 217.00 350.50 626.25 b 1207.00 7052.75
1976 1535.50 1082.50 892.00 483.00 303.00 15.00 4.00 30.00 186.50 599.50 1076.00 1582.50 7789.50
1977 1872.00 1204.00 732.00 363.00 92.50 75.00 4.65 a 61.50 120.50 486.50 831.72 a 1384.50 7227.87
1978 1619.50 1467.00 1147.50 615.50 252.50 45.50 11.50 11.00 87.00 497.00 834.00 1397.00 7985.00
1979 1804.00 1475.00 1031.50 652.00 280.03 a 51.00 11.50 50.24 b 107.00 529.07 a 909.50 1129.50 8030.34
1980 1460.00 1392.00 1114.50 512.50 138.50 61.61 b 10.00 5.50 g 159.83 a 659.27 a 896.90 a 1335.50 7740.60
1981 1502.00 1179.50 924.50 488.50 336.50 33.10 a 27.50 26.50 215.50 606.00 796.00 1323.50 7459.10
1982 1795.50 1350.50 1112.50 715.00 149.00 151.00 6.00 67.50 229.50 454.00 881.50 1086.50 7998.50
1983 1294.00 1057.50 972.50 684.50 411.00 80.00 14.00 5.00 201.00 455.50 806.50 1660.05 a 7641.55
1984 1587.50 1025.00 1177.50 596.50 364.50 17.00 l 0.00 z 14.00 y 203.00 417.50 876.50 1220.50 7468.50
1985 1644.50 1372.00 859.00 462.50 161.50 90.00 6.50 34.50 186.50 512.00 1012.50 1706.50 8048.00
1986 1522.50 1299.00 971.50 477.50 233.50 82.00 9.50 77.00 184.50 514.00 1072.00 1299.00 7742.00
1987 1398.00 1030.00 931.50 481.61 b 224.48 b 33.00 12.00 69.50 182.50 647.50 801.96 b 1161.47 a 6973.52
1988 1608.79 b 1409.50 962.50 580.00 165.00 65.17 a 8.00 42.50 181.00 722.00 848.50 1319.00 7911.97
1989 1226.00 1496.50 1156.00 633.00 287.50 93.50 10.50 27.00 252.50 559.00 1074.50 1704.50 8520.50
1990 1224.50 1185.50 903.50 597.50 392.00 85.50 38.00 58.00 225.50 610.50 771.50 1345.50 7437.50
1991 1606.50 1138.50 918.00 467.50 192.50 24.00 13.50 17.00 243.50 508.00 1022.50 1265.50 7417.00
1992 1267.00 1075.50 1000.50 678.50 274.00 100.00 44.50 102.50 236.00 601.00 973.00 1307.00 7659.50
1993 1434.00 1301.00 1107.00 732.50 269.00 122.00 3.50 29.50 337.50 616.00 952.50 1291.50 8196.00
1994 1855.50 1481.50 991.50 549.50 286.00 59.50 18.50 63.50 123.00 444.00 773.00 1149.50 7795.00
1995 1463.00 1263.00 949.00 739.00 329.50 31.50 22.50 0.00 251.00 496.50 1142.00 1438.00 8125.00
1996 1591.50 1340.73 a 1215.00 729.50 437.00 78.00 36.00 24.00 200.00 523.00 1154.00 1386.00 8714.73
1997 1602.00 1218.00 1063.00 689.00 448.00 40.50 23.50 47.50 135.50 490.50 957.00 1146.50 7861.00
1998 1268.50 897.00 949.50 506.00 121.00 91.00 0.00 0.00 64.00 409.00 743.00 1104.50 6153.50
1999 1563.50 989.13 e 965.00 499.50 202.00 70.50 0.00 26.00 185.00 506.00 672.00 1236.00 6914.63
2000 1420.50 1099.50 754.00 610.00 237.50 71.00 20.50 10.00 199.00 383.00 921.00 1671.50 7397.50
2001 1417.50 1294.00 1094.50 473.50 222.00 114.23 d 19.00 4.50 205.50 513.50 593.50 1064.00 7015.73
2002 1215.50 1032.00 1139.50 594.50 394.00 64.00 1.00 3.50 95.00 603.50 932.00 1183.50 7258.00
2003 1514.00 1345.50 1036.00 623.50 295.50 81.00 4.00 2.00 172.00 499.50 863.00 1142.00 7578.00
2004 1606.50 1256.50 870.00 548.00 323.50 91.00 24.50 94.00 78.00 439.50 777.00 1293.00 7401.50
2005 1487.00 1085.50 1124.50 474.00 347.00 23.50 11.50 11.50 73.50 459.50 846.50 1455.50 7399.50
2006 1080.00 1280.50 993.50 451.00 286.00 44.50 2.50 1.50 208.00 622.50 764.50 1131.50 6866.00
2007 1289.00 1469.50 904.50 641.50 184.00 36.00 3.00 10.50 133.50 317.50 902.50 1422.50 7314.00
2008 1492.50 1468.50 1160.50 558.00 360.50 30.00 5.00 3.50 111.50 509.00 875.50 1547.00 8121.50
2009 1766.00 1210.50 1012.00 624.50 249.00 94.00 41.00 41.50 95.00 629.00 699.50 1330.50 7792.50
2010 1477.00 1224.00 857.50 417.00 226.50 25.00 2.50 4.50 186.00 414.00 798.00 1445.00 7077.00
2011 1540.00 1292.50 1088.10 a 640.34 a 326.50 65.50 0.00 5.00 216.00 425.50 796.00 1113.00 7508.44
2012 1325.00 1061.09 a 551.00 553.00 153.00 46.00 0.00 a 24.00 219.50 360.00 i 0.00 z 0.00 z 3932.59
Period of Record Statistics
MEAN 1489.88 1240.30 994.05 574.94 268.05 63.45 13.16 29.37 174.96 501.07 868.78 1317.58 7553.15
S.D. 184.91 154.51 141.81 96.62 89.16 31.10 12.25 27.15 59.09 103.37 126.41 173.58 518.86
SKEW 0.06 -0.12 -0.84 -0.01 0.05 0.48 0.96 1.00 0.03 -0.28 0.29 0.71 -0.18
MAX 1872.00 1496.50 1215.00 739.00 448.00 151.00 44.50 102.50 337.50 722.00 1154.00 1706.50 8714.73
MIN 1080.00 897.00 551.00 363.00 92.50 13.50 0.00 0.00 64.00 239.50 593.50 1064.00 6153.50
NO YRS 42 42 42 42 42 41 41 40 42 41 42 42 39