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
1954 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 0.00 z 0.00
1955 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 0.00 z 0.00
1956 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 0.00 z 0.00
1957 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 0.00 z 0.00
1958 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 0.00 z 0.00
1959 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 0.00 z 0.00
1960 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3.00 q 225.50 526.50 975.00 1539.50 3266.50
1961 1660.50 1158.89 a 947.57 a 811.00 356.50 60.50 8.50 13.00 207.00 k 527.00 1009.50 1616.00 8168.96
1962 1810.00 1517.50 1207.50 724.50 204.00 76.00 17.50 9.00 200.00 j 487.50 892.50 1449.50 8395.50
1963 1930.50 1480.50 950.50 541.50 329.00 48.00 5.00 33.50 131.00 286.50 889.00 1761.00 8386.00
1964 1499.00 1278.50 1342.50 584.00 194.50 78.00 0.00 80.50 238.00 539.50 1008.00 1737.50 8580.00
1965 1884.00 1585.00 1527.50 682.00 232.00 41.90 a 8.00 52.00 432.50 505.00 1043.50 1273.50 9266.90
1966 2043.42 a 1477.26 a 988.00 777.50 388.50 58.50 0.50 70.50 220.00 574.00 1170.00 1568.00 9336.18
1967 1673.00 1685.50 1185.00 651.00 455.00 77.00 42.00 49.00 186.50 587.00 1035.00 1450.00 9076.00
1968 1695.00 1566.00 861.50 555.50 376.00 67.00 26.50 52.50 181.00 505.50 988.50 1611.50 8486.50
1969 1903.50 1391.00 1368.50 566.00 259.00 163.50 22.50 5.00 190.50 656.00 1016.50 1467.00 9009.00
1970 1931.00 1447.50 1358.00 697.00 293.50 40.00 10.00 18.50 234.00 580.00 1107.50 1587.50 9304.50
1971 1946.00 1439.50 1242.50 611.90 a 345.00 32.50 56.50 49.00 200.00 466.50 1030.00 1566.00 8985.40
1972 1917.50 1670.00 1241.00 728.50 220.00 72.00 26.50 55.00 252.00 673.50 1063.50 1786.00 9705.50
1973 1583.00 1313.50 873.50 639.00 309.00 45.00 6.50 14.00 270.00 403.00 1025.00 1596.50 8078.00
1974 1754.00 1435.50 1226.50 602.00 399.00 66.50 2.00 72.00 287.50 485.00 998.50 1350.50 8679.00
1975 1669.50 1475.50 1398.00 880.00 207.50 83.00 15.50 24.00 296.00 472.50 983.00 1542.00 9046.50
1976 1801.00 1217.00 1149.50 449.50 260.50 21.50 4.50 17.50 186.00 704.00 1219.50 1736.00 8766.50
1977 2097.00 1250.00 936.00 402.00 77.00 30.00 5.00 39.50 177.00 551.50 1061.00 1675.50 8301.50
1978 1899.00 1553.50 1178.50 666.50 204.00 73.00 14.00 17.50 150.00 513.00 1096.00 1680.50 9045.50
1979 2052.00 1663.50 1230.50 781.00 414.00 62.50 2.07 a 46.00 139.00 589.50 1042.50 1276.00 9298.57
1980 1665.50 1497.50 1289.50 498.50 183.00 48.50 2.00 17.00 211.50 654.00 894.50 1472.50 8434.00
1981 1493.50 1218.50 885.00 503.50 270.00 45.00 4.50 22.22 a 205.00 587.50 844.50 1570.00 7649.22
1982 2081.00 1446.50 1237.00 677.50 150.00 124.50 1.00 41.50 203.00 527.50 1151.00 1313.50 8954.00
1983 1528.50 1150.50 1024.00 697.00 335.00 87.50 5.50 0.00 197.50 557.50 977.50 2007.50 8568.00
1984 1680.50 1114.00 1267.50 584.50 292.50 27.00 10.50 13.00 324.00 507.50 1005.50 1583.00 8409.50
1985 1754.00 1457.50 971.00 528.21 b 156.00 145.00 8.50 83.00 297.00 659.50 1388.50 1861.50 9309.71
1986 1570.50 1496.50 1067.00 557.00 271.00 50.17 a 1.00 61.50 243.00 551.50 1195.50 1336.00 8400.67
1987 1422.00 997.00 897.00 365.50 150.00 28.00 6.00 46.00 138.50 664.00 877.00 1356.00 6947.00
1988 1787.00 1577.00 1042.00 544.00 72.00 10.50 0.00 27.00 157.00 688.50 1071.00 1504.00 8480.00
1989 1500.00 1676.00 1292.00 657.50 250.07 a 76.50 0.00 14.50 186.00 506.00 1183.00 1759.50 9101.07
1990 1273.00 1239.50 998.00 617.00 317.50 41.50 10.50 28.00 159.50 596.00 968.50 1622.50 7871.50
1991 1702.00 1182.00 1070.00 559.50 211.50 7.50 0.00 9.50 221.00 612.50 1294.50 1462.00 8332.00
1992 1452.50 1155.50 1008.00 698.00 183.00 79.50 58.50 97.50 209.50 608.00 1099.50 1438.50 8088.00
1993 1593.50 1359.50 1085.50 628.50 237.00 91.50 10.00 23.50 314.50 596.00 1115.50 1453.00 8508.00
1994 2033.00 1568.50 1033.00 593.50 198.00 29.00 6.00 44.00 132.50 461.50 888.00 1345.00 8332.00
1995 1573.00 1379.50 1028.50 743.00 297.00 44.50 3.00 4.50 222.00 579.50 1199.00 1518.50 8592.00
1996 1886.50 1463.50 1337.50 760.50 324.00 37.50 10.00 1.00 193.50 503.00 1276.50 1680.00 9473.50
1997 1835.00 1328.00 1210.00 684.50 365.00 0.50 31.00 30.00 100.50 495.50 1156.50 1215.50 8452.00
1998 1538.50 968.00 1069.50 460.50 99.00 83.00 0.50 0.00 89.00 451.00 928.50 1317.00 7004.50
1999 1704.48 a 1109.00 1006.50 566.00 216.00 63.00 0.00 8.50 200.00 540.50 782.00 1293.50 7489.48
2000 1607.50 1185.00 805.00 616.00 204.00 111.50 23.00 14.50 179.00 436.50 1070.50 1875.00 8127.50
2001 1464.00 1612.00 1225.50 605.50 212.50 62.50 11.50 13.00 247.50 697.50 684.64 b 1346.50 8182.64
2002 1361.00 1188.00 1487.50 763.00 454.00 43.00 4.50 6.00 184.00 853.50 1078.50 1304.00 8727.00
2003 1605.50 1502.00 1206.00 623.79 a 291.40 a 61.50 6.00 11.00 255.50 542.50 1117.00 1368.00 8590.19
2004 1809.50 1377.00 1043.50 0.00 z 400.50 145.00 39.50 136.50 147.00 585.50 915.00 0.00 z 6599.00
2005 1773.00 1284.00 0.00 z 0.00 z 368.00 16.00 20.50 54.50 135.50 545.00 991.50 1515.50 6703.50
2006 0.00 z 1509.50 1077.50 481.00 298.50 39.00 5.00 16.00 300.00 716.00 988.00 1260.00 6690.50
2007 1493.50 1594.00 1037.50 703.50 200.00 22.00 8.50 44.00 213.00 481.50 1027.50 1685.50 8510.50
2008 1807.50 1601.00 1310.50 750.00 389.50 70.50 13.00 33.00 210.00 613.50 1006.00 1767.50 9572.00
2009 2044.00 1439.50 1254.50 682.50 375.00 139.50 46.00 59.00 116.00 773.50 812.50 1593.50 9335.50
2010 1751.50 1481.00 921.00 426.00 318.00 64.00 7.50 13.50 289.50 505.50 1028.00 1651.50 8457.00
2011 1831.00 1483.00 1332.50 696.50 322.50 92.50 1.00 5.50 240.00 479.50 977.59 a 0.00 z 7461.59
2012 262.00 y 1230.95 a 709.50 561.72 a 202.00 40.34 a 0.00 44.50 242.50 672.00 1002.00 1493.00 6198.52
2013 1657.50 1483.50 1416.50 43.00 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 4557.50
Period of Record Statistics
MEAN 1726.05 1395.47 1131.89 623.68 271.87 62.00 12.07 33.48 210.99 563.81 1031.12 1534.10 8605.56
S.D. 200.03 180.70 184.20 110.41 93.14 36.01 14.38 27.93 64.08 97.60 129.58 181.86 615.32
SKEW -0.02 -0.43 0.00 -0.16 -0.06 0.89 1.77 1.31 0.74 0.31 0.13 0.30 -0.63
MAX 2097.00 1685.50 1527.50 880.00 455.00 163.50 58.50 136.50 432.50 853.50 1388.50 2007.50 9705.50
MIN 1273.00 968.00 709.50 365.50 72.00 0.50 0.00 0.00 89.00 286.50 684.64 1215.50 6947.00
NO YRS 51 53 52 50 52 52 52 52 51 53 53 51 45