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
1940 1763.00 1274.00 1250.50 687.50 305.50 40.00 13.95 a 61.00 120.50 398.50 1054.00 1306.00 8274.45
1941 1428.00 1360.00 1152.50 403.50 166.00 80.00 11.00 13.50 139.00 448.00 831.72 a 1133.64 b 7166.86
1942 1411.00 1266.22 a 932.00 406.50 312.00 63.21 b 16.00 29.93 b 248.04 b 498.50 884.46 b 1516.42 a 7584.28
1943 1709.81 b 1290.59 a 1256.50 652.50 341.50 57.86 b 2.07 a 13.95 a 267.41 a 510.50 1053.50 1297.19 b 8453.38
1944 1197.12 a 1252.00 1204.50 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 3653.62
1945 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
1946 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
1947 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
1948 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
1949 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5.50 207.50 341.00 832.50 1324.50 2711.00
1950 1612.00 c 1400.00 1268.50 807.50 275.00 57.50 9.50 56.50 99.50 302.25 a 1037.50 1653.50 8579.25
1951 1676.00 1291.50 1279.27 a 703.00 0.00 z 53.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5003.27
1952 1465.27 a 1134.50 1140.00 518.00 225.50 21.00 0.00 5.00 127.50 585.00 0.00 z 1216.00 6437.77
1953 1369.00 1227.33 a 1009.50 706.00 213.50 21.00 4.00 0.00 b 101.50 247.50 0.00 z 1192.50 6091.83
1954 1535.57 b 386.50 p 1048.00 460.50 357.50 34.00 0.00 7.23 a 125.00 484.63 a 788.00 1230.00 6070.44
1955 1462.34 b 1330.00 b 1204.83 e 361.00 126.58 a 42.00 0.00 3.00 101.50 380.50 1073.50 1500.00 7585.26
1956 1480.77 a 1379.50 1172.00 648.00 231.50 15.50 3.10 a 13.50 163.50 228.50 869.00 1222.50 7427.37
1957 1591.50 1126.22 a 1005.50 518.50 225.00 26.00 0.00 a 12.00 153.50 487.00 897.00 1176.50 7218.72
1958 1284.43 a 1324.00 956.00 495.00 b 159.50 78.10 a 5.50 21.50 92.00 321.50 796.00 1459.21 c 6992.75
1959 1655.00 1352.50 1001.50 523.50 145.00 12.41 a 4.00 1.50 131.50 582.00 1118.00 1024.55 a 7551.46
1960 1334.50 1229.50 1249.30 a 523.00 195.00 37.50 4.00 4.00 157.00 418.50 785.00 1353.00 7290.30
1961 1467.50 1028.00 915.00 694.00 253.00 21.50 0.00 1.00 184.00 383.50 893.89 c 1416.70 a 7258.09
1962 1638.50 1327.50 1101.50 610.00 144.50 38.50 4.00 1.00 184.00 367.00 806.00 1352.50 7575.00
1963 1789.00 1377.00 910.00 458.50 235.00 19.50 0.00 13.00 80.00 142.50 707.00 1602.50 7334.00
1964 1257.00 1085.00 1069.00 487.00 126.00 48.00 0.50 37.00 167.00 450.50 801.50 1453.00 6981.50
1965 1605.00 1388.50 1282.50 650.50 125.00 14.50 5.50 35.50 260.00 390.00 864.50 1073.00 7694.50
1966 1842.50 1289.50 850.00 612.50 313.50 23.50 0.50 26.50 147.50 446.00 907.50 1326.50 7786.00
1967 1418.00 1451.50 981.00 524.00 352.00 10.00 25.50 37.00 124.00 477.50 931.50 1230.00 7562.00
1968 1438.00 1358.00 753.50 425.50 288.00 49.00 7.50 12.00 117.50 378.00 842.00 1375.00 7044.00
1969 1646.00 1201.00 1191.50 433.50 191.50 123.00 5.50 0.00 118.50 513.00 886.50 1306.00 7616.00
1970 1742.50 1288.52 a 1117.00 523.50 211.00 31.50 5.00 3.50 168.50 415.00 911.00 1373.00 7790.02
1971 1749.00 1310.00 1143.50 513.00 295.00 19.50 11.50 22.00 137.00 299.00 870.50 1306.00 7676.00
1972 1697.00 1468.50 1134.50 659.50 167.50 57.50 18.50 28.50 149.50 570.00 933.50 1536.50 8421.00
1973 1398.00 1170.00 737.00 580.00 294.50 15.00 0.00 7.50 189.00 321.00 854.00 1398.00 6964.00
1974 1495.50 1277.00 1024.00 520.00 337.50 58.50 0.00 28.50 246.00 433.50 865.50 1202.00 7488.00
1975 1470.00 1312.50 1227.50 737.50 170.50 51.50 18.50 5.00 240.50 383.00 788.50 1355.50 7760.50
1976 1643.00 1091.00 964.00 416.50 223.00 6.50 1.00 12.50 155.50 610.50 1068.50 1610.50 7802.50
1977 1967.50 1175.50 782.00 328.50 56.00 25.00 0.00 17.00 93.50 520.50 940.50 1468.50 7374.50
1978 1806.50 1537.00 1119.00 585.50 209.50 55.00 8.00 7.50 116.50 513.50 1032.22 c 1516.42 a 8506.64
1979 1939.05 a 1560.50 1088.50 660.50 295.00 32.00 2.50 46.50 c 102.00 555.50 958.50 1168.00 8408.55
1980 1538.50 1422.50 1163.50 519.00 167.50 41.50 0.00 9.41 c 144.50 586.00 836.50 1347.50 7776.41
1981 1403.50 1141.00 890.00 447.41 a 257.00 23.50 8.00 9.50 163.50 553.00 800.50 1415.50 7112.41
1982 1863.10 a 1343.00 1048.00 659.50 105.00 85.50 0.00 z 35.50 188.79 a 421.50 935.50 1172.00 7857.39
1983 1338.50 1064.50 946.50 693.00 322.00 62.50 1.50 0.00 169.50 478.50 890.50 1812.00 7779.00
1984 1563.00 1029.50 1178.00 521.00 282.50 10.00 2.00 3.00 203.50 401.50 895.86 a 1367.21 b 7457.07
1985 1621.30 a 1364.00 887.00 411.00 97.00 97.00 0.50 28.00 0.00 z 454.00 1085.00 1715.33 a 7760.13
1986 1427.50 1302.50 882.50 390.50 148.50 18.50 1.50 30.00 121.50 428.00 1010.00 1222.00 6983.00
1987 1298.00 925.50 795.50 329.50 124.50 12.50 0.00 30.00 84.00 586.00 748.50 1156.00 6090.00
1988 1607.00 1409.50 928.50 482.00 80.50 13.50 0.50 15.50 84.50 611.00 865.50 1317.50 7415.50
1989 1245.00 1444.00 1120.50 558.00 221.13 a 59.00 0.00 2.50 151.00 417.50 1052.00 1628.00 7898.63
1990 1157.50 1123.50 862.32 a 518.00 260.50 37.50 2.50 2.50 110.50 441.50 708.50 1411.50 6636.32
1991 1568.00 1085.00 905.50 431.50 187.00 0.50 r 3.50 4.00 203.00 508.50 1128.00 1262.00 7286.00
1992 1273.00 1023.50 972.50 611.00 168.50 55.00 18.50 44.50 136.00 484.50 943.00 1283.50 7013.50
1993 1492.50 1262.00 1048.50 608.50 205.50 59.00 0.00 10.50 256.00 489.00 937.00 1261.00 7629.50
1994 1833.00 1425.00 920.50 514.50 184.00 25.50 2.50 40.00 86.50 345.00 755.50 1165.50 7297.50
1995 1412.00 1212.50 891.00 654.00 225.50 36.00 7.50 0.00 178.00 466.00 1101.50 1404.00 7588.00
1996 1673.00 1327.00 1179.50 627.00 300.00 44.00 5.50 1.50 145.00 431.00 1108.50 1468.50 8310.50
1997 1582.50 1183.00 1022.50 590.00 311.00 4.50 17.00 19.50 85.00 437.00 1033.50 1141.50 7427.00
1998 1334.50 896.00 975.00 382.00 63.00 95.00 0.00 0.00 49.00 365.00 773.50 1128.00 6061.00
1999 1596.00 988.00 911.50 471.00 146.50 58.00 0.52 a 12.50 179.50 507.00 721.50 1214.00 6806.02
2000 1491.50 1033.50 736.50 539.50 210.50 47.50 14.50 13.00 186.50 315.50 923.00 1727.50 7239.00
2001 1315.00 1372.00 1095.50 466.50 200.00 69.50 0.00 0.50 167.00 474.82 a 496.50 1081.00 6738.32
2002 1171.50 969.50 1161.50 550.00 320.00 29.00 0.00 4.50 108.50 624.00 913.50 1141.50 6993.50
2003 1492.00 1309.00 982.00 511.50 216.00 24.50 1.50 4.50 154.50 441.50 892.00 1177.00 7206.00
2004 1565.50 1185.50 872.00 454.50 244.50 65.00 7.50 62.50 66.00 425.00 769.00 1275.00 6992.00
2005 1457.50 1033.00 1017.00 397.00 269.50 0.50 1.00 6.00 53.50 377.00 800.50 1388.50 6801.00
2006 1085.00 1198.00 939.50 330.00 223.50 18.00 0.00 0.00 192.50 568.00 799.00 1068.00 6421.50
2007 1342.50 1449.00 815.00 546.00 84.00 7.50 0.00 3.50 90.50 310.00 870.00 1417.50 6935.50
2008 1533.00 1422.50 1076.00 557.50 259.50 7.50 0.50 2.00 86.00 429.50 865.00 1540.50 7779.50
2009 1722.00 1139.00 928.50 513.50 191.50 66.00 12.50 19.50 58.50 618.00 636.00 1367.50 7272.50
2010 1554.50 1230.00 744.50 277.00 203.50 9.00 0.00 0.00 120.50 347.00 814.50 1471.00 6771.50
2011 1588.00 1241.00 1030.50 567.00 206.50 25.00 0.00 0.00 164.00 342.55 a 740.50 1133.00 7038.05
2012 1288.00 1108.73 a 490.32 a 450.00 85.25 a 17.50 0.00 a 8.50 142.00 271.00 k 0.00 z 0.00 z 3590.30
Period of Record Statistics
MEAN 1520.86 1247.71 1013.81 528.54 214.22 38.84 4.56 15.11 144.62 440.72 886.46 1338.72 7400.62
S.D. 193.40 150.92 160.16 111.54 76.12 25.71 6.05 15.97 51.97 100.71 125.13 173.83 551.80
SKEW 0.08 -0.29 -0.45 0.09 -0.09 0.84 1.52 1.26 0.45 -0.28 -0.12 0.53 0.05
MAX 1967.50 1560.50 1282.50 807.50 357.50 123.00 25.50 62.50 267.41 624.00 1128.00 1812.00 8579.25
MIN 1085.00 896.00 490.32 277.00 56.00 0.50 0.00 0.00 49.00 142.50 496.50 1024.55 6061.00
NO YRS 68 67 68 67 66 66 65 67 66 66 64 66 59