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
1944 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 9.50 z 0.00 z 0.00 z 0.00 z 1081.00 j 0.00
1945 1666.00 1376.50 838.50 651.50 458.00 220.00 38.00 0.00 z 270.00 593.00 967.00 1581.00 8659.50
1946 1533.47 a 1371.50 786.50 511.50 323.00 69.00 5.68 a 53.00 182.50 408.00 945.00 0.00 z 6189.15
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 837.50 j 1468.50 1468.50
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 33.00 10.00 17.50 96.00 510.00 868.00 1400.50 2935.00
1949 1488.00 1385.50 1120.00 595.00 130.00 j 25.00 c 0.00 12.50 215.00 426.50 900.00 1400.00 7567.50
1950 1728.25 c 1398.00 1321.00 876.00 341.00 82.00 34.00 98.00 187.00 417.50 1123.50 1664.50 9270.75
1951 1740.00 1369.50 1340.00 717.00 185.00 113.00 27.00 65.50 295.00 563.50 1229.00 1508.50 9153.00
1952 1589.00 1284.80 a 1268.93 a 548.79 a 289.00 44.00 12.00 43.50 211.03 a 733.50 930.50 1309.75 a 8264.81
1953 1482.83 a 1400.50 1130.50 753.50 155.50 n 49.50 13.90 b 5.50 197.00 352.37 a 831.00 1378.00 7594.60
1954 1687.00 1001.50 1179.00 581.00 454.00 58.50 18.00 24.50 236.50 598.50 877.50 1343.00 8059.00
1955 1617.50 1434.74 a 1231.50 407.00 189.62 a 68.50 0.00 19.93 c 186.96 b 486.50 1150.00 1638.87 a 8431.12
1956 1597.61 c 1488.50 1262.00 714.60 e 250.98 e 41.00 38.20 c 40.00 254.00 351.00 1004.50 1349.50 8391.88
1957 1792.50 1293.00 1103.00 607.50 b 305.50 59.50 0.00 31.50 265.00 595.00 990.00 b 1341.50 8384.00
1958 1428.00 1450.00 1042.50 573.00 274.35 a 157.00 11.50 n 62.50 156.50 460.19 b 932.00 1616.50 8152.54
1959 1750.47 a 1426.00 1077.00 576.50 185.00 h 47.68 b 17.16 c 10.00 183.50 663.00 1226.67 c 1146.00 8123.97
1960 1493.00 1336.00 1360.00 575.50 267.50 95.00 19.00 g 19.24 b 218.50 519.50 895.00 1461.00 8240.24
1961 1573.50 1113.50 971.00 739.00 335.50 64.00 11.00 6.41 b 231.50 471.00 976.00 1481.80 a 7974.21
1962 1725.00 1431.50 1140.00 664.50 191.00 71.38 a 10.50 g 14.50 255.50 455.50 920.50 1418.50 8287.88
1963 1874.97 b 1475.00 996.50 528.50 345.81 b 66.21 a 7.50 46.00 135.00 243.50 823.50 1693.00 8235.48
1964 1399.00 1220.07 a 1159.00 571.50 162.48 b 61.50 k 1.50 65.50 242.14 b 561.50 891.00 1599.00 7872.70
1965 1727.00 1483.00 1381.50 704.50 169.00 40.00 13.50 59.50 355.00 c 488.00 967.50 1214.50 8603.00
1966 1909.00 1340.50 971.00 705.00 361.84 b 58.50 i 4.50 49.50 192.93 a 543.50 1004.50 1445.50 8527.78
1967 1532.00 1548.50 1117.50 596.50 438.50 29.00 35.00 34.50 j 198.00 574.50 1040.00 1360.00 8469.50
1968 1599.50 1459.00 816.85 a 513.50 344.00 79.00 27.50 53.00 175.50 469.50 955.00 1481.50 7973.85
1969 1697.00 1270.50 1245.50 529.50 245.00 184.50 19.00 1.50 162.50 630.00 977.50 1380.00 8342.50
1970 1815.00 1387.00 1230.50 590.50 272.00 47.00 6.00 17.50 214.50 484.00 1006.00 1417.00 8487.00
1971 1802.50 1354.00 1201.00 592.50 346.50 26.50 29.00 33.00 175.50 355.50 944.50 1440.50 8301.00
1972 1811.50 1545.00 1244.00 712.00 201.00 74.50 35.77 e 38.00 g 215.50 655.50 979.00 1611.00 9084.77
1973 1518.50 1256.50 776.50 640.50 352.00 20.50 2.58 a 17.50 220.50 383.00 943.93 b 1491.00 7623.01
1974 1623.00 1352.50 1121.00 576.00 341.50 101.50 0.00 46.50 298.93 b 519.00 918.00 1280.00 8177.93
1975 1564.00 1337.00 1292.00 776.00 215.00 91.50 28.00 27.50 288.62 a 465.00 a 857.00 1414.00 8355.62
1976 1700.50 1185.50 1081.00 525.00 336.50 27.00 8.50 62.00 277.00 743.00 1258.00 1804.50 9008.50
1977 2064.50 1318.50 935.50 456.50 108.50 89.50 9.50 112.50 201.00 622.00 1062.00 1587.00 8567.00
1978 1835.00 1591.50 1223.00 679.50 274.50 121.50 53.50 48.00 174.50 617.00 1121.00 1736.50 9475.50
1979 2024.00 1632.50 1230.00 782.50 451.50 138.50 31.50 82.00 154.50 587.00 986.00 1236.50 9336.50
1980 1601.00 1448.00 1248.50 533.00 213.50 62.50 6.50 21.50 215.50 651.00 916.50 1452.00 8369.50
1981 1492.50 1215.00 943.00 545.00 321.50 58.00 29.50 24.00 237.00 610.50 867.00 1474.00 7817.00
1982 1937.50 1435.50 1181.50 716.50 151.00 168.00 6.50 78.00 245.50 524.50 1032.00 1258.50 8735.00
1983 1449.50 1093.50 999.00 726.50 411.00 73.00 12.50 1.00 209.00 532.50 907.50 1837.50 8252.50
1984 1665.50 1080.00 1223.50 535.00 341.00 15.50 10.00 13.00 243.50 404.50 959.50 1440.50 7931.50
1985 1686.50 1363.00 878.00 447.50 122.00 125.50 6.50 34.00 258.00 534.00 1160.50 1791.50 8407.00
1986 1527.00 1369.00 931.00 427.50 181.50 40.00 3.50 57.50 179.50 510.50 1064.00 1319.50 7610.50
1987 1383.00 1009.00 846.50 381.00 167.00 25.50 6.00 30.50 119.50 681.00 817.50 1235.50 6702.00
1988 1692.00 1487.00 996.50 555.50 117.28 a 23.50 2.00 22.00 125.00 672.50 896.00 1401.50 7990.78
1989 1379.50 1539.00 1217.00 626.00 263.00 87.00 0.00 14.00 171.00 476.00 1073.50 1712.50 8558.50
1990 1238.00 1245.00 920.50 530.50 307.00 35.50 9.00 12.50 136.00 528.00 799.00 1475.00 7236.00
1991 1645.50 1168.50 967.50 481.50 207.00 10.00 18.00 22.00 277.00 621.50 1228.50 1462.00 8109.00
1992 1440.00 1157.50 1079.00 717.00 252.00 104.50 62.00 88.50 255.50 607.00 1007.00 1398.00 8168.00
1993 1650.00 1402.00 1153.50 716.00 306.00 128.50 9.50 31.50 387.00 666.00 1067.50 1416.00 8933.50
1994 1972.00 1546.50 1029.00 652.50 274.00 53.00 30.50 73.50 141.50 474.50 880.00 1334.00 8461.00
1995 1555.50 1390.00 1063.00 793.00 296.00 55.50 25.00 3.50 266.50 573.50 1228.00 1568.00 8817.50
1996 1810.00 1499.00 1369.50 772.50 379.00 69.00 26.00 18.00 223.00 570.00 1235.50 1591.50 9563.00
1997 1764.50 1300.50 1167.50 686.00 439.50 23.00 40.50 68.50 163.50 547.50 1093.50 1209.00 8503.50
1998 1461.50 954.00 1055.00 474.00 111.50 125.00 2.00 3.00 106.00 519.00 869.00 1334.50 7014.50
1999 1747.00 1122.50 1037.50 537.50 206.67 a 83.50 2.50 22.50 252.50 612.25 a 823.00 1361.50 7808.92
2000 1671.50 1231.00 835.50 0.00 z 245.50 84.50 0.00 u 15.50 238.50 479.50 1026.50 1855.50 7683.50
2001 1512.50 1545.50 1207.00 570.00 254.50 101.50 23.50 15.50 251.00 632.50 670.00 1211.00 7994.50
2002 1357.00 1153.00 1329.50 667.00 421.50 52.00 1.00 22.00 175.50 747.50 1045.00 1323.00 8294.00
2003 1643.50 1518.00 1148.00 643.50 298.00 80.00 18.50 14.00 219.00 578.50 1031.00 1329.50 8521.50
2004 1752.50 1369.00 1035.00 562.50 348.00 123.00 28.50 142.50 117.00 525.50 875.00 1435.00 8313.50
2005 1631.00 1201.00 1211.00 481.00 329.00 13.00 13.50 36.00 134.50 509.00 939.00 0.00 z 6498.00
2006 1207.50 1355.00 1055.50 455.00 269.50 44.50 2.50 0.00 z 282.00 713.00 911.50 1210.00 7506.00
2007 1462.50 1539.00 966.00 635.00 198.50 36.00 12.50 31.50 172.50 435.50 984.00 1577.00 8050.00
2008 1679.50 1590.50 1313.00 700.50 377.50 45.50 4.50 32.50 160.00 577.50 966.50 1695.00 9142.50
2009 1925.00 1337.78 a 1130.50 636.00 289.00 129.50 59.50 58.00 102.00 737.50 778.00 1506.50 8689.28
2010 1652.00 1357.00 878.00 419.00 282.00 58.00 0.00 11.50 280.00 504.00 968.50 1599.50 8009.50
2011 1751.00 1404.50 1236.50 699.50 327.16 c 80.00 0.00 10.00 256.00 480.50 880.86 a 1308.00 8434.02
2012 1453.38 a 1175.00 648.93 a 583.50 161.00 42.00 0.00 42.22 b 235.50 444.50 i 0.00 z 0.00 z 4341.54
Period of Record Statistics
MEAN 1639.18 1347.25 1098.40 607.36 280.93 72.16 16.03 36.76 211.32 542.16 977.29 1458.79 8337.07
S.D. 177.62 153.67 165.57 107.43 90.49 43.55 15.30 28.82 58.97 104.15 122.45 166.13 569.52
SKEW 0.04 -0.50 -0.43 0.06 0.02 1.08 1.10 1.30 0.26 -0.18 0.46 0.49 -0.27
MAX 2064.50 1632.50 1381.50 876.00 458.00 220.00 62.00 142.50 387.00 747.50 1258.00 1855.50 9563.00
MIN 1207.50 954.00 648.93 381.00 108.50 10.00 0.00 1.00 96.00 243.50 670.00 1146.00 6702.00
NO YRS 66 66 66 65 63 65 63 63 67 66 66 65 50