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
1952 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 7.00 n 4.00 34.50 179.50 704.73 a 853.50 1288.00 3064.23
1953 1429.50 1219.00 1008.50 721.00 276.42 a 24.50 14.50 17.50 169.00 363.39 d 816.21 a 1210.00 7269.51
1954 1515.79 b 873.00 1064.50 449.00 392.50 58.50 0.00 22.50 143.28 a 525.00 810.50 1296.50 7151.07
1955 1490.50 1326.50 1120.50 364.50 144.50 59.50 0.00 8.00 138.50 457.00 1065.00 1572.00 7746.50
1956 1585.00 1441.71 a 1192.50 647.00 229.00 0.00 z 10.50 34.50 201.00 287.00 951.50 1226.50 7806.21
1957 1630.50 1103.00 1026.00 523.50 251.50 41.50 1.00 27.79 b 197.50 558.00 959.50 1223.00 7542.79
1958 1358.50 1379.00 624.00 l 543.00 200.50 120.50 22.50 41.50 137.00 375.50 866.90 a 1542.00 6586.90
1959 1681.00 1410.00 1105.00 544.50 164.00 47.68 b 23.00 3.50 207.00 639.50 973.00 f 1096.22 b 6921.40
1960 1379.50 b 1286.00 1383.00 556.73 d 255.00 92.50 28.00 8.78 a 206.50 517.50 865.50 1395.00 7974.01
1961 1522.00 1094.00 1014.50 768.10 a 344.50 64.14 a 8.00 g 12.00 251.25 b 437.74 b 945.50 1482.00 7935.73
1962 1665.50 1362.67 a 1171.00 693.75 b 170.50 b 73.97 a 31.00 d 26.72 b 271.11 c 449.50 647.50 g 1362.50 7278.22
1963 1823.50 1288.00 b 808.77 c 630.00 371.00 77.00 9.50 i 71.09 b 201.50 297.50 280.00 u 1651.00 7219.35
1964 1295.00 1143.50 1114.00 541.07 b 155.50 64.66 a 3.62 a 70.27 a 235.00 573.50 879.00 1519.00 7594.11
1965 1685.00 1455.50 1399.00 683.28 a 199.00 66.50 14.47 a 68.09 c 271.50 489.28 a 926.00 1115.50 8373.12
1966 1852.00 1373.00 925.35 a 699.50 424.70 a 90.50 11.50 68.00 252.41 a 559.03 a 982.50 1404.50 8643.00
1967 1502.00 1515.00 1032.00 585.00 450.50 50.00 53.98 b 96.00 243.50 597.00 1053.50 1292.59 c 8471.07
1968 1541.22 a 1443.02 b 870.00 550.50 392.84 b 95.50 24.00 68.50 216.00 474.82 a 962.88 d 1439.50 8078.78
1969 1672.00 1272.50 1311.50 537.00 264.50 199.00 16.00 13.50 216.43 b 625.00 993.50 1407.50 8528.43
1970 1866.50 1373.50 1180.00 610.50 250.00 64.00 24.00 18.50 201.00 487.50 956.25 b 1456.48 a 8488.23
1971 1763.00 1343.50 1213.50 588.50 399.26 b 20.00 40.00 59.50 177.00 335.00 928.93 b 1325.52 b 8193.71
1972 1717.40 a 951.50 k 1181.44 d 341.00 o 81.50 o 72.41 a 40.00 g 47.50 185.00 607.50 951.50 1570.00 6332.76
1973 1445.50 1158.00 756.00 651.00 339.50 29.00 5.50 29.00 185.50 333.50 856.50 1446.00 7235.00
1974 1521.50 1299.50 1021.50 518.50 334.50 93.50 6.00 48.00 293.50 464.50 857.50 1271.00 7729.50
1975 1499.00 1306.00 1296.50 754.00 188.50 74.00 24.00 13.00 299.00 429.50 823.00 1319.50 8026.00
1976 1587.20 a 1076.50 962.50 493.50 312.00 28.00 12.50 52.50 220.50 676.50 1133.00 1660.00 8214.70
1977 1958.50 1186.00 781.50 365.50 85.00 40.50 4.00 70.27 a 131.50 544.00 966.00 1499.50 7632.27
1978 1820.50 1561.50 1135.63 a 579.50 240.50 52.50 14.39 c 24.50 104.50 510.50 973.50 1494.50 8512.03
1979 1935.50 1539.50 1086.00 678.50 294.00 42.50 11.00 45.00 131.00 523.50 931.50 1137.00 8355.00
1980 1461.50 1409.00 1143.50 540.50 213.00 47.50 2.50 1.50 141.50 617.50 862.00 1352.50 7792.50
1981 1386.50 1137.00 880.50 433.50 316.00 52.50 22.00 27.50 190.50 552.50 855.00 1439.50 7293.00
1982 1837.00 1341.00 1095.00 701.00 203.50 179.50 10.50 59.50 204.50 492.50 962.50 1198.50 8285.00
1983 1391.00 1113.00 958.50 727.00 378.50 93.00 10.00 4.00 208.50 530.00 861.50 1855.00 8130.00
1984 1570.50 1077.50 1229.00 577.50 367.00 25.00 0.00 z 20.50 222.00 440.00 939.83 a 1372.50 7841.33
1985 1639.50 1425.50 935.00 469.50 109.00 l 107.00 11.50 98.00 290.00 636.50 1212.00 1821.52 b 8646.02
1986 1568.50 1399.00 998.20 a 533.50 283.50 73.00 0.00 z 118.00 209.00 592.00 1188.50 1398.00 8361.20
1987 1477.50 1077.50 945.50 542.00 235.00 63.50 25.50 106.50 246.50 0.00 z 0.00 z 1191.00 5910.50
1988 1689.50 1411.16 a 970.00 0.00 z 165.00 32.50 12.00 0.00 z 155.00 642.00 0.00 z 0.00 z 5077.16
1989 1271.00 1431.00 1117.50 621.00 306.50 105.00 1.00 21.00 203.00 427.00 1015.50 1660.50 8180.00
1990 1210.50 1210.00 868.50 590.50 354.50 63.00 13.00 18.00 162.50 533.00 774.50 1520.00 7318.00
1991 1719.50 1160.50 955.50 520.50 235.50 20.00 31.00 14.00 254.50 573.50 1193.50 1355.50 8033.50
1992 1371.00 1068.50 1013.00 0.00 z 265.50 92.50 0.00 z 101.00 217.00 556.50 984.00 1361.00 7030.00
1993 1606.00 1372.50 1162.50 695.50 299.50 93.00 7.50 28.00 332.50 604.00 1004.50 1312.00 8517.50
1994 1851.00 1535.00 981.50 594.00 277.00 54.00 30.50 70.50 118.00 439.50 831.50 1258.50 8041.00
1995 1527.50 1251.50 961.00 734.50 319.00 47.50 21.50 2.00 254.50 547.00 1169.00 1453.00 8288.00
1996 1740.50 1429.00 1224.50 739.50 390.50 71.50 16.50 32.50 218.00 522.50 1177.50 1541.00 9103.50
1997 1674.00 1253.00 1066.00 662.00 441.50 35.00 41.50 44.50 154.50 528.50 1049.50 1217.50 8167.50
1998 1393.00 953.50 1038.00 511.00 137.00 120.50 6.00 1.50 97.00 462.50 827.00 1203.00 6750.00
1999 1667.50 1046.00 999.00 539.48 a 212.00 70.50 2.00 17.00 228.00 564.00 743.00 1287.00 7375.48
2000 1550.00 1108.00 787.00 583.00 218.50 67.00 22.00 7.00 205.50 440.50 999.00 1791.00 7778.50
2001 1465.00 1462.50 1199.00 492.00 234.00 105.50 14.00 10.50 200.50 545.00 550.00 1134.00 7412.00
2002 1223.50 1075.00 1213.50 572.00 330.50 41.00 2.50 17.50 152.00 667.50 994.00 1270.00 7559.00
2003 1054.00 i 1383.00 1022.00 597.50 307.00 83.00 12.50 6.50 212.50 542.00 969.50 1260.50 6396.00
2004 1610.00 1311.50 905.00 572.00 297.00 103.00 21.50 115.50 105.50 519.50 851.50 1350.00 7762.00
2005 1570.50 1070.00 1094.50 476.00 361.00 11.00 17.00 28.50 112.50 493.00 888.50 1521.00 7643.50
2006 1143.50 1286.50 1029.00 450.50 303.50 48.00 3.00 5.50 256.00 661.50 853.00 1148.00 7188.00
2007 1417.00 1549.50 940.00 641.50 170.00 29.50 10.50 13.00 159.50 385.00 962.50 1493.50 7771.50
2008 1648.50 1523.00 1197.00 656.50 348.00 39.50 2.50 23.00 115.00 536.50 897.00 1609.50 8596.00
2009 1837.50 1227.50 1019.50 616.00 269.00 98.00 45.00 55.50 107.50 681.00 721.00 1485.50 8163.00
2010 1666.50 1386.50 879.00 404.50 270.50 24.00 0.00 8.50 189.00 449.00 900.50 1548.45 a 7726.45
2011 1657.50 1320.00 1106.50 626.00 301.50 60.00 3.00 7.00 216.50 441.00 824.00 1222.00 7785.00
2012 1364.00 1079.50 521.00 533.79 a 150.00 44.00 0.00 50.00 227.50 595.50 852.50 1275.13 a 6692.93
2013 1490.50 1311.00 1274.10 a 34.50 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 4075.60
Period of Record Statistics
MEAN 1574.00 1283.73 1048.17 582.99 277.42 66.81 14.86 37.23 197.26 517.68 932.55 1393.48 7893.73
S.D. 184.31 162.59 160.22 95.93 84.14 35.70 12.46 31.24 53.64 96.41 124.05 175.77 519.08
SKEW -0.06 -0.31 -0.37 -0.13 -0.01 1.32 1.02 0.98 0.07 -0.32 0.10 0.55 -0.19
MAX 1958.50 1561.50 1399.00 768.10 450.50 199.00 53.98 118.00 332.50 704.73 1212.00 1855.00 9103.50
MIN 1143.50 873.00 521.00 364.50 85.00 11.00 0.00 1.50 97.00 287.00 550.00 1096.22 6692.93
NO YRS 60 60 60 57 58 59 55 60 61 60 56 60 46