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
1961 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 25.00 i 51.67 a 330.00 587.50 1096.50 1622.00 3687.67
1962 1898.50 1560.00 1201.00 827.50 353.00 175.50 92.00 88.00 357.00 587.00 961.00 1593.00 9693.50
1963 2020.00 1623.00 1132.50 703.50 438.00 115.50 33.50 97.00 245.50 365.50 956.50 1810.50 9541.00
1964 1534.50 1411.50 1373.00 697.00 291.00 172.00 21.50 175.00 321.50 621.50 1039.00 1767.50 9425.00
1965 1908.00 1668.50 1568.50 771.00 359.50 175.50 78.50 126.07 a 504.00 589.00 1114.50 1362.00 10225.07
1966 2105.00 1500.00 1117.50 862.50 494.00 146.50 17.50 109.00 294.00 668.00 1161.50 1618.00 10093.50
1967 1708.50 1714.50 1206.00 776.00 556.50 149.50 73.00 128.00 261.50 682.50 1155.00 1533.50 9944.50
1968 1735.50 1584.00 984.50 687.00 453.50 150.00 74.50 100.50 256.00 559.50 1056.50 1651.00 9292.50
1969 1853.50 1423.50 1374.50 684.50 397.50 301.50 78.00 33.50 273.00 762.50 1096.50 1495.00 9773.50
1970 1924.58 a 1511.00 1432.50 806.00 476.00 124.00 30.50 70.50 311.00 613.00 1133.50 1682.50 10115.08
1971 2025.00 1468.00 1320.50 763.50 466.50 77.00 110.00 132.50 285.00 507.50 1102.50 1599.00 9857.00
1972 2032.00 1723.50 1403.00 889.00 283.50 161.50 90.50 113.00 365.50 739.00 1129.00 1777.50 10707.00
1973 1657.00 1407.50 937.00 748.50 431.00 124.50 65.50 43.00 341.00 496.00 1078.50 1616.50 8946.00
1974 1813.50 1484.00 1326.50 723.50 498.00 162.50 22.00 131.00 444.50 621.50 1032.00 1385.50 9644.50
1975 1738.50 1456.50 1436.00 938.50 296.00 161.38 a 35.50 91.50 371.50 547.50 1036.00 1640.00 9748.88
1976 1863.50 1259.50 1293.50 592.00 396.50 90.50 38.50 88.50 296.00 867.00 1327.50 1883.50 9996.50
1977 2098.00 1359.50 996.00 554.00 174.00 111.00 30.50 185.50 308.50 636.00 1118.50 1678.00 9249.50
1978 1907.50 1590.50 1243.50 754.50 310.00 159.00 75.50 92.00 243.00 619.00 1184.50 1769.00 9948.00
1979 2103.00 1698.00 1299.50 874.00 538.50 192.00 57.50 119.50 263.00 724.00 1148.00 1400.50 10417.50
1980 1792.00 1592.50 1384.50 618.62 a 270.50 150.00 26.00 67.50 343.50 771.00 1056.00 1651.00 9723.12
1981 1645.50 1309.50 1042.50 682.50 399.50 146.00 55.50 59.00 333.50 715.50 915.00 1586.00 8890.00
1982 2146.50 1536.50 1315.00 833.00 294.50 252.50 29.00 124.50 297.50 578.50 1191.00 1383.00 9981.50
1983 1608.50 1212.00 1125.00 790.00 489.00 157.50 18.50 14.00 264.50 637.00 1079.00 2023.50 9418.50
1984 1753.00 1173.50 1359.00 669.50 417.50 93.50 51.50 41.50 387.50 543.00 1073.50 1598.00 9161.00
1985 1786.00 1499.50 1020.50 604.50 280.00 261.00 57.50 157.00 342.50 667.00 1331.00 1912.00 9918.50
1986 1589.00 1486.00 1087.00 605.50 324.50 122.00 28.50 129.00 310.50 623.50 1211.50 1456.00 8973.00
1987 1528.00 1085.00 968.00 495.50 298.50 75.00 24.00 81.50 211.50 743.50 968.50 1380.00 7859.00
1988 1874.50 1656.50 1197.50 681.21 a 215.50 60.00 28.00 74.50 258.00 780.50 1072.00 1606.00 9504.21
1989 1603.00 1729.50 1396.00 785.50 373.50 158.50 20.50 74.50 269.00 598.00 1247.00 1872.00 10127.00
1990 1399.50 1363.00 1118.50 694.50 447.50 102.00 73.50 71.50 263.00 698.50 997.00 1621.00 8849.50
1991 1804.00 1261.00 1151.00 611.00 293.50 85.00 57.50 44.50 323.00 731.00 1313.50 1538.50 9213.50
1992 1518.50 1250.50 1142.00 796.00 312.00 226.00 170.00 191.00 314.50 687.00 1138.00 1559.00 9304.50
1993 1707.50 1457.00 1208.50 772.00 420.50 222.50 68.50 73.00 458.00 731.00 1219.00 1535.00 9872.50
1994 2098.50 1621.50 1085.50 720.00 325.00 89.50 72.50 107.50 214.50 534.00 957.50 1402.50 9228.50
1995 1647.00 1511.50 1125.00 890.00 412.00 89.00 52.00 12.00 333.50 644.00 1342.00 1681.50 9739.50
1996 2000.00 1567.00 1437.00 885.50 475.50 131.50 68.50 40.50 288.00 630.50 1304.00 1719.00 10547.00
1997 1832.00 1393.50 1253.50 809.50 545.50 83.00 83.50 144.50 225.00 608.00 1218.00 1312.00 9508.00
1998 1552.50 1024.00 1138.00 609.00 251.00 177.50 48.50 20.00 180.50 533.50 975.00 1408.00 7917.50
1999 1729.50 1179.50 1063.00 639.00 312.00 123.50 24.00 63.50 296.00 649.50 840.50 1369.00 8289.00
2000 1658.00 1232.50 913.50 716.50 304.50 219.50 57.00 46.00 303.00 510.00 1051.03 a 1901.50 8913.03
2001 1466.00 1602.00 1244.00 669.00 310.50 130.00 52.00 44.50 287.50 647.50 744.50 1306.50 8504.00
2002 1433.00 1180.50 1450.50 755.00 510.50 85.50 16.50 50.00 218.50 851.50 1157.50 1363.00 9072.00
2003 1694.50 1515.50 1220.00 0.00 z 0.00 z 68.00 i 40.50 23.50 257.50 586.50 1115.00 1353.50 7806.50
2004 1858.50 1336.00 1096.00 680.50 462.00 195.00 53.00 f 173.50 144.00 561.50 937.00 1540.00 8984.00
2005 1776.50 1250.50 1229.00 555.50 433.00 58.00 39.00 76.00 150.50 4.50 z 0.00 z 0.00 z 5568.00
2006 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 971.50 1255.50 2227.00
2007 1590.50 1596.50 1025.07 a 733.50 279.50 63.50 41.50 65.00 231.50 514.50 1052.00 1641.45 a 8834.52
2008 1720.50 c 1588.00 1295.80 a 744.50 482.00 153.50 36.50 63.00 243.00 591.50 1051.00 1777.69 b 9746.99
2009 1931.00 1374.00 1177.50 701.00 379.00 200.00 116.50 120.38 a 125.00 803.00 823.00 1635.25 a 9385.63
2010 1670.90 a 1370.00 832.00 497.50 346.00 138.50 0.00 z 0.00 z 0.00 z 400.50 o 0.00 z 1690.00 6544.90
2011 1921.00 1503.00 1365.50 831.72 a 500.65 a 228.50 44.00 63.50 330.00 a 574.50 1016.38 a 1421.35 a 9800.10
2012 1550.52 a 1287.00 859.50 738.50 382.00 131.00 8.50 t 0.00 z 368.57 b 749.50 1096.00 1526.50 8689.09
2013 1733.50 1554.00 1442.02 a 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 4729.52
Period of Record Statistics
MEAN 1775.40 1445.91 1204.17 723.84 382.86 146.08 53.73 87.59 292.89 638.53 1087.82 1586.47 9486.67
S.D. 190.74 173.68 170.61 103.07 93.26 55.45 30.48 45.49 73.86 99.11 129.51 178.25 626.24
SKEW 0.13 -0.40 -0.15 -0.17 -0.02 0.58 1.38 0.47 0.28 0.09 -0.15 0.24 -0.61
MAX 2146.50 1729.50 1568.50 938.50 556.50 301.50 170.00 191.00 504.00 867.00 1342.00 2023.50 10707.00
MIN 1399.50 1024.00 832.00 495.50 174.00 58.00 16.50 12.00 125.00 365.50 744.50 1255.50 7859.00
NO YRS 51 51 51 49 49 49 47 49 50 49 50 51 45