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
1963 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 95.00 l 68.89 d 193.50 k 459.00 619.00 873.50 658.00 t 2020.39
1964 1721.50 1519.50 1328.83 e 855.00 c 476.50 135.50 j 0.00 z 0.00 z 0.00 z 97.50 y 0.00 z 0.00 z 5901.33
1965 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
1966 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 420.52 a 436.50 j 950.50 1401.00 2772.02
1967 1329.50 f 0.00 z 1569.12 a 975.50 703.00 149.50 17.50 52.00 227.00 k 644.05 b 992.22 c 1485.86 b 6588.75
1968 1594.50 f 1670.50 1261.50 748.00 515.00 0.00 z 0.00 z 0.00 z 229.00 558.50 0.00 z 1492.81 b 6475.31
1969 0.00 z 0.00 z 0.00 z 0.00 z 519.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 519.00
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 0.00 z 0.00 z 0.00
1971 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 565.23 a 1073.40 e 0.00 z 1638.63
1972 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 633.00 h 0.00 z 0.00 z 0.00
1973 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 44.00 w 397.00 682.00 1118.50 1262.00 3459.50
1974 1926.00 1640.50 1420.50 923.00 662.37 a 123.00 71.30 a 111.50 396.50 838.50 1001.50 1505.00 10619.67
1975 1802.00 1642.50 1431.50 975.50 405.50 173.50 20.00 128.00 350.50 694.50 970.00 1723.00 10316.50
1976 1965.50 1612.50 1428.00 862.00 452.50 143.00 105.00 140.50 386.50 770.50 1137.50 1835.50 10839.00
1977 1964.50 1565.50 1087.00 927.50 490.00 228.50 107.00 138.00 424.50 690.00 937.50 1545.50 10105.50
1978 1809.00 1548.00 1455.50 931.50 405.50 145.50 83.50 127.00 472.00 763.00 1129.50 1563.00 10433.00
1979 1678.00 1599.50 1059.50 779.00 396.00 140.50 47.00 176.50 374.50 671.50 921.00 1476.50 9319.50
1980 1674.00 1672.00 1374.50 786.50 518.06 e 206.67 c 107.50 77.00 429.50 768.50 1043.50 1844.50 10502.22
1981 1986.00 1149.50 1166.00 805.00 395.50 186.00 55.00 143.50 348.50 763.00 973.50 1334.00 9305.50
1982 2030.50 1670.50 1390.50 955.50 455.00 205.50 96.00 234.50 348.50 678.50 987.50 1400.50 10453.00
1983 1636.50 1493.33 a 1188.50 757.50 538.00 200.50 108.50 101.00 328.00 728.50 1039.00 1641.00 9760.33
1984 2007.50 1381.00 1530.50 851.50 571.50 279.50 84.00 99.00 455.50 691.00 984.00 1453.50 10388.50
1985 1939.00 1477.50 1416.50 960.50 538.00 222.50 57.00 151.50 327.50 721.50 1130.00 1786.50 10728.00
1986 1743.00 1584.00 1407.00 735.50 464.00 349.00 162.23 a 192.50 535.50 800.50 1234.00 1678.02 d 10885.25
1987 1872.00 1613.00 1285.00 712.00 528.50 233.00 127.00 224.50 401.00 718.50 1152.00 1551.03 a 10417.53
1988 1838.50 1654.50 1369.50 788.00 368.50 246.50 67.50 113.00 385.00 769.50 969.00 1675.50 10245.00
1989 1819.50 1633.00 1515.50 890.50 290.88 a 187.00 93.50 96.00 307.00 673.50 1085.00 2013.50 10604.88
1990 1630.00 1670.50 1358.00 793.50 502.50 135.00 74.00 55.50 345.00 660.50 1032.50 1446.50 9703.50
1991 1982.50 1567.50 1287.00 821.00 424.00 189.00 91.50 79.00 391.00 659.00 1006.50 1712.00 10210.00
1992 1811.50 1683.00 1488.00 889.00 401.00 186.00 164.50 93.00 276.00 755.00 1107.50 1435.00 10289.50
1993 1847.50 1877.00 1438.00 805.50 455.00 199.00 90.50 61.00 358.50 843.00 1071.50 1437.00 10483.50
1994 2134.00 1719.00 1297.00 885.00 568.50 157.50 15.50 z 19.50 z 375.50 617.50 943.00 1499.00 10196.00
1995 1648.50 1726.00 1327.50 971.50 489.50 168.50 33.00 104.00 422.50 576.60 a 1118.00 1719.00 10304.60
1996 1818.50 1594.50 1347.00 818.50 538.50 158.50 70.50 109.00 329.50 745.00 1093.00 1253.00 9875.50
1997 1819.50 1672.00 1549.50 946.50 572.50 186.00 80.00 152.50 314.00 734.00 1084.00 1585.50 10696.00
1998 1711.00 1391.00 1230.50 794.50 279.00 167.00 46.00 107.00 299.00 679.00 1057.00 1393.50 9154.50
1999 1864.50 1480.50 1105.50 828.50 283.50 108.00 52.00 119.00 169.50 779.50 923.00 1376.50 9090.00
2000 1823.50 1635.00 1154.50 842.00 511.50 234.00 98.50 104.50 369.00 723.50 897.50 1605.50 9999.00
2001 1817.00 1543.50 1371.50 871.50 287.50 166.50 66.00 65.50 272.00 590.50 898.50 1213.50 9163.50
2002 1605.00 1515.50 1363.00 830.50 524.00 263.50 86.50 95.50 256.50 781.00 1143.00 1542.00 10006.00
2003 1960.00 1764.00 1493.00 1027.50 530.00 180.00 g 51.50 112.50 229.50 710.00 983.50 1405.50 10267.00
2004 1977.50 1596.50 1316.00 831.50 480.50 297.50 62.50 91.50 351.50 690.50 1099.50 1649.00 10444.00
2005 1912.70 a 1505.50 1389.50 815.50 558.50 153.50 62.50 106.50 286.00 604.00 1007.00 1528.00 9929.20
2006 1590.00 1527.50 1271.50 756.00 377.00 99.00 27.50 171.00 329.00 694.00 888.50 1317.50 9048.50
2007 1692.50 1716.00 1438.00 918.00 520.00 164.00 92.48 a 151.00 312.50 577.00 1086.00 1747.50 10414.98
2008 1779.50 1719.00 1695.50 792.50 493.50 167.50 16.00 73.50 297.00 708.50 935.00 1625.00 10302.50
2009 2107.00 1517.50 1440.00 797.50 479.00 186.00 82.00 84.50 319.00 817.00 863.50 1427.50 10120.50
2010 1472.00 1208.50 1077.50 668.50 378.00 193.00 42.00 73.50 288.50 670.50 1001.50 1273.00 8346.50
2011 1654.00 1607.00 1381.00 893.50 463.00 169.00 46.50 57.00 254.50 588.50 862.00 1391.90 a 9367.90
2012 1749.43 a 1577.50 1166.50 764.00 469.00 263.50 34.00 25.00 273.00 420.00 i 0.00 z 0.00 z 6321.93
Period of Record Statistics
MEAN 1820.52 1583.92 1349.30 847.18 471.60 190.54 73.71 112.76 346.38 698.00 1018.70 1529.79 10052.03
S.D. 150.21 134.54 142.57 81.66 92.34 52.21 34.43 45.73 73.11 74.48 91.30 177.50 600.46
SKEW -0.03 -1.13 -0.19 0.17 -0.18 0.88 0.58 0.74 0.11 -0.09 0.10 0.47 -0.93
MAX 2134.00 1877.00 1695.50 1027.50 703.00 349.00 164.50 234.50 535.50 843.00 1234.00 2013.50 10885.25
MIN 1472.00 1149.50 1059.50 668.50 279.00 99.00 16.00 25.00 169.50 558.50 862.00 1213.50 8346.50
NO YRS 40 41 42 42 43 39 40 39 43 43 43 42 36