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
1950 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 259.00 m 1014.00 1491.21 b 2505.21
1951 1528.50 1231.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 133.00 t 488.00 1076.50 1312.50 5637.00
1952 1338.00 1100.00 1109.50 549.50 340.00 94.50 20.00 26.50 176.38 a 605.05 c 794.00 1096.50 7249.93
1953 1209.00 a 1138.50 992.00 713.00 446.00 93.00 21.00 2.00 169.00 369.50 689.00 1121.50 6963.50
1954 1335.00 954.00 1052.00 651.50 489.50 114.00 21.50 24.50 122.59 a 467.00 781.50 1176.00 7189.09
1955 1402.50 1183.26 a 1109.50 501.50 337.00 132.50 3.00 8.00 179.00 459.50 914.42 d 865.50 l 6230.18
1956 1300.00 1203.50 1129.00 748.00 479.50 135.50 41.00 26.35 a 282.32 b 428.83 a 877.50 1196.50 7848.00
1957 1574.50 1117.00 1035.00 680.17 a 441.00 160.71 b 23.00 11.50 200.50 490.50 851.50 1128.50 7713.89
1958 1285.50 1303.50 969.00 623.79 a 382.00 225.52 a 44.84 c 28.00 152.00 467.50 780.50 1443.00 7705.15
1959 1580.00 1311.50 1115.50 647.50 391.50 106.00 49.94 d 3.00 176.90 a 569.50 1063.50 1046.50 8061.34
1960 1257.00 251.00 v 874.00 h 663.50 466.00 107.50 j 47.50 24.50 134.50 503.50 805.00 1348.50 5250.00
1961 1432.50 1023.00 967.00 738.00 478.50 135.50 36.17 a 11.00 143.00 468.00 832.50 1306.50 7571.67
1962 1549.50 1284.50 1056.50 676.50 348.50 144.50 19.50 21.00 237.41 a 423.00 789.00 1296.00 7845.91
1963 1683.50 1397.50 1022.00 619.00 448.50 176.50 26.00 54.00 158.50 259.50 698.50 1473.50 8017.00
1964 1184.00 1116.50 1052.50 636.50 0.00 z 158.00 18.50 64.50 235.00 567.50 767.50 1279.00 7079.50
1965 1411.00 1258.50 1192.50 735.50 428.50 183.50 62.00 46.00 216.50 479.50 797.00 1023.00 7833.50
1966 1561.50 1173.50 947.00 713.00 497.00 147.00 3.50 25.50 160.50 526.00 852.50 1234.50 7841.50
1967 1281.50 1311.50 1074.50 678.00 533.00 149.00 78.00 93.00 187.50 517.50 938.50 1194.00 8036.00
1968 1362.00 1337.00 911.00 658.00 467.00 176.00 84.50 82.50 117.50 507.00 811.00 1239.00 7752.50
1969 1466.50 1109.50 1122.00 683.50 434.50 296.00 58.00 9.50 166.00 549.50 901.00 1189.50 7985.50
1970 1592.50 1223.00 1076.00 654.00 438.50 168.00 18.50 10.50 186.50 474.00 820.00 1238.50 7900.00
1971 1565.00 1240.00 1161.50 747.00 477.50 154.50 69.50 86.00 133.50 327.50 845.00 1157.00 7964.00
1972 1528.00 1320.50 1163.00 789.50 379.50 222.50 107.00 72.00 208.00 567.50 854.50 1345.50 8557.50
1973 1281.50 1101.50 841.50 757.50 475.00 122.50 30.00 11.50 184.00 372.50 882.41 a 1265.00 7324.91
1974 1365.00 1222.00 1024.50 699.00 485.50 220.00 28.50 41.50 283.50 570.50 838.50 1112.50 7891.00
1975 1296.00 1175.50 1153.50 811.00 355.50 134.00 22.50 11.00 228.00 440.50 740.00 1206.50 7574.00
1976 1513.00 1069.00 986.50 658.00 442.50 76.50 8.78 a 60.00 192.00 584.00 1048.00 1558.00 8196.28
1977 1781.00 1157.50 880.00 610.00 291.50 197.00 44.00 106.50 170.00 509.50 858.00 1326.50 7931.50
1978 1531.50 1360.50 1114.50 697.50 439.50 232.50 110.00 69.00 105.00 516.00 868.50 1353.50 8398.00
1979 1687.50 1431.00 1078.50 779.50 502.50 208.00 32.50 42.00 131.50 552.50 847.50 1071.00 8364.00
1980 1366.50 1270.50 1114.50 623.50 322.50 185.00 26.50 12.00 150.50 565.50 813.00 1251.00 7701.00
1981 1424.00 1113.00 941.50 620.00 462.50 113.00 26.00 17.00 176.50 575.50 759.00 1198.50 7426.50
1982 1640.00 1230.50 1068.00 773.50 356.50 235.50 45.00 47.50 223.00 474.00 0.00 z 1034.00 7127.50
1983 1206.50 995.50 980.50 749.00 535.50 148.00 13.00 2.50 207.50 481.00 788.50 1585.50 7693.00
1984 1501.50 1044.50 1187.50 679.00 476.50 132.50 35.50 13.00 306.50 490.00 900.00 1210.00 7976.50
1985 1565.50 1288.00 922.00 669.00 372.00 b 221.00 27.50 45.50 232.00 529.50 906.00 1561.00 8339.00
1986 1407.00 1230.00 1010.71 b 589.00 326.50 171.50 42.00 32.00 144.50 473.00 936.50 1171.00 7533.71
1987 1263.50 965.00 896.00 597.50 348.00 58.50 14.50 29.50 126.00 592.00 771.00 1068.50 6730.00
1988 1477.00 1347.00 993.00 657.00 304.46 c 84.00 13.50 16.53 a 159.00 646.00 813.00 1288.00 7798.50
1989 1140.50 1403.50 1203.00 754.00 463.50 191.00 10.50 29.50 196.50 556.00 963.50 1608.00 8519.50
1990 1130.00 1139.50 981.50 668.00 498.50 162.00 42.00 24.50 141.00 538.50 747.00 1249.50 7322.00
1991 1494.50 1106.50 975.00 632.50 351.50 71.50 25.50 9.50 241.00 541.00 1026.00 1180.00 7654.50
1992 1263.00 1079.00 1049.00 781.00 427.00 207.50 81.50 116.00 276.50 570.00 911.00 1189.50 7951.00
1993 1341.50 1249.00 1079.00 763.00 465.00 201.00 16.50 17.50 321.00 581.00 892.00 1189.00 8115.50
1994 1725.50 1412.50 1049.00 662.50 438.50 158.00 36.00 81.00 102.50 459.50 767.50 1057.00 7949.50
1995 1329.50 1232.00 1011.00 753.50 423.50 99.50 38.50 0.00 229.00 500.00 1093.50 1377.00 8087.00
1996 1503.50 1317.50 1225.50 789.00 494.00 219.00 75.50 9.00 169.00 556.00 1041.00 1250.50 8649.50
1997 1460.50 1146.00 1075.50 751.00 549.50 139.50 56.00 69.00 137.50 547.50 951.50 1085.00 7968.50
1998 1260.50 915.50 999.00 634.50 310.00 124.00 5.00 0.50 85.50 458.50 752.50 1100.50 6646.00
1999 1492.50 1001.00 995.00 626.00 349.00 159.00 13.00 27.50 223.00 561.62 a 699.50 1205.00 7352.12
2000 1417.50 1134.50 817.00 720.00 374.50 156.50 45.00 16.50 202.50 452.00 890.50 1576.00 7802.50
2001 1311.50 1243.50 1105.00 635.00 417.50 183.00 37.00 3.00 213.00 518.50 652.50 1051.50 7371.00
2002 1176.50 1040.00 1174.50 689.50 534.00 167.00 7.50 17.50 127.00 625.50 917.00 1202.50 7678.50
2003 1482.50 1353.50 1120.50 760.00 449.50 229.50 45.00 14.50 214.00 572.00 874.50 1121.50 8237.00
2004 1600.50 1231.00 972.00 690.50 492.00 213.00 61.00 8.00 z 105.00 o 455.00 714.50 1245.50 7675.00
2005 1393.00 1064.00 1167.48 c 615.00 a 442.00 70.50 11.00 10.00 100.50 497.00 831.50 1342.00 7543.98
2006 1051.50 1226.00 1005.00 549.00 429.50 101.50 9.00 8.50 198.00 631.00 782.50 1079.50 7071.00
2007 1245.50 1404.50 953.50 716.00 381.00 108.50 22.50 16.00 180.50 390.50 868.00 1311.00 7597.50
2008 1406.50 1408.50 1167.50 701.50 467.00 140.00 37.50 11.50 116.00 514.50 884.50 1469.50 8324.50
2009 1678.50 1184.50 1101.50 708.00 421.00 196.50 53.00 79.50 112.00 631.50 684.00 1300.00 8150.00
2010 1371.00 1146.00 926.50 578.50 324.00 68.50 2.50 3.50 241.50 432.50 834.50 1334.50 7263.50
2011 1498.50 1235.50 1156.96 c 748.50 496.52 a 152.59 a 2.50 1.00 185.00 450.02 a 761.90 a 1060.00 7748.98
2012 1234.00 1036.50 739.57 c 669.83 a 304.00 87.41 a 0.00 10.00 202.00 401.00 h 0.00 z 0.00 z 4283.31
Period of Record Statistics
MEAN 1415.21 1197.52 1041.65 683.17 425.04 155.31 34.53 31.04 182.95 507.00 850.25 1248.88 7780.32
S.D. 160.13 127.14 101.89 66.72 67.28 50.95 25.11 29.18 52.53 74.64 101.40 150.37 431.95
SKEW 0.06 -0.10 -0.50 -0.28 -0.28 0.16 1.03 1.19 0.45 -0.69 0.50 0.69 -0.41
MAX 1781.00 1431.00 1225.50 811.00 549.50 296.00 110.00 116.00 321.00 646.00 1093.50 1608.00 8649.50
MIN 1051.50 915.50 739.57 501.50 291.50 58.50 0.00 0.00 85.50 259.50 652.50 1023.00 6646.00
NO YRS 62 61 60 61 60 60 61 60 60 61 61 61 55