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 94.50 j 58.12 c 54.85 e 265.50 607.00 832.50 1356.77 a 3174.74
1945 1515.50 1237.00 932.50 833.50 665.00 360.50 95.50 56.00 277.50 581.50 957.50 1413.00 8925.00
1946 1489.00 1371.50 886.50 660.00 528.00 219.50 71.50 95.50 259.50 529.00 944.50 1405.50 8460.00
1947 1417.00 1451.00 1301.00 936.50 668.00 338.50 56.50 29.50 288.50 368.50 1057.50 1312.00 9224.50
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 205.86 a 74.50 82.50 164.50 495.50 854.00 1288.00 3164.86
1949 1362.50 1357.00 1228.00 703.00 492.00 120.50 52.00 36.50 293.00 537.00 950.00 1378.00 8509.50
1950 1730.00 1374.50 1416.00 1020.00 634.50 233.00 f 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 6175.00
1951 0.00 z 0.00 z 0.00 z 294.00 r 440.50 285.00 88.00 118.50 304.50 607.50 1114.00 1423.50 4381.50
1952 1530.00 1214.50 1245.50 687.00 514.48 e 169.50 64.00 85.00 234.50 691.82 a 908.50 1148.50 8493.30
1953 1388.50 1320.50 1142.00 849.00 558.50 227.50 80.50 44.50 248.00 438.00 803.50 1262.00 8362.50
1954 1574.50 1043.50 1225.50 782.00 673.50 177.00 85.00 75.50 274.00 608.00 852.50 1202.50 8573.50
1955 1488.50 1354.50 1371.50 631.00 430.50 153.50 13.50 11.50 222.50 530.00 1062.93 a 1472.50 8742.43
1956 1478.50 1402.00 1298.50 871.50 571.50 219.00 161.00 94.50 336.50 384.00 928.00 1296.50 9041.50
1957 1717.50 1394.50 1268.50 786.00 517.50 221.00 47.00 52.50 288.50 544.50 934.50 1261.00 9033.00
1958 1353.50 1414.00 1136.00 711.00 485.00 265.50 78.00 70.50 152.50 469.50 889.50 1534.00 8559.00
1959 1752.00 1459.50 1149.00 736.50 391.50 143.00 27.00 21.00 202.00 622.00 1157.00 1096.50 8757.00
1960 1469.50 1361.00 1410.00 732.50 565.50 206.50 67.00 40.00 210.50 493.50 843.00 1417.00 8816.00
1961 1584.00 1180.00 1054.00 811.00 501.50 208.50 47.50 9.00 245.00 487.50 882.50 1345.50 8356.00
1962 1628.00 1441.00 1164.50 823.50 461.50 295.00 97.00 67.50 248.50 480.50 826.00 1362.50 8895.50
1963 1821.50 1575.00 1155.00 744.50 495.00 207.00 23.50 62.50 167.00 265.00 782.00 1487.50 8785.50
1964 1303.50 1245.00 1242.50 784.50 328.00 230.00 26.00 122.00 279.50 549.00 861.50 1469.50 8441.00
1965 1642.00 1518.00 1396.50 793.00 464.00 248.00 89.50 107.00 384.00 495.00 930.00 1149.00 9216.00
1966 1738.50 1337.50 1073.00 821.00 545.00 163.50 19.50 85.50 223.00 554.00 968.00 1326.00 8854.50
1967 1458.00 1527.50 1177.50 809.00 627.50 197.50 53.00 g 81.00 199.50 594.50 982.50 1281.50 8936.00
1968 1563.00 1470.50 1044.50 735.50 601.50 303.62 a 78.00 88.50 196.50 475.00 907.00 1353.50 8817.12
1969 1529.00 1275.50 1268.50 762.00 469.00 364.50 108.00 21.50 191.00 648.00 947.50 1261.00 8845.50
1970 1699.50 1423.50 1278.50 816.50 599.00 212.00 26.50 30.48 a 238.00 545.50 959.50 1352.50 9181.48
1971 1711.50 1407.50 1265.00 796.50 609.67 a 208.50 102.30 a 121.00 212.50 409.00 945.00 1348.50 9136.97
1972 1753.00 1592.50 1397.00 943.50 574.00 301.50 104.50 116.00 315.00 670.00 968.50 1114.00 j 8735.50
1973 0.00 z 0.00 z 989.00 811.50 581.50 187.50 57.00 37.00 237.50 432.50 935.00 1376.00 5644.50
1974 1599.50 1465.50 1273.00 833.79 a 619.50 261.50 48.50 103.00 386.50 417.00 h 927.78 c 1180.00 8698.57
1975 1486.00 1304.00 1257.64 b 946.00 424.04 c 225.50 48.00 70.50 366.50 549.50 874.50 1139.00 f 7552.17
1976 1649.00 1175.00 1254.90 e 715.00 549.50 167.00 61.50 95.50 326.50 753.50 1120.50 1668.50 9536.40
1977 1938.50 1005.00 g 1070.50 735.56 c 359.37 d 237.00 66.50 151.50 312.00 602.00 948.00 1400.50 7821.43
1978 1647.00 1448.50 1258.00 923.00 480.50 241.50 107.47 a 91.45 a 224.00 544.00 995.50 1186.00 f 7960.92
1979 1903.50 1681.50 1274.50 928.50 685.50 288.60 e 94.50 119.00 239.00 656.00 1009.00 1225.00 10104.60
1980 1555.00 1044.50 h 1322.50 757.00 420.50 266.50 52.00 58.00 320.50 673.00 901.50 1452.00 7778.50
1981 1456.00 749.50 i 1118.50 778.00 599.50 223.00 66.50 30.48 a 265.50 667.50 568.00 j 1302.00 6506.98
1982 1848.00 1421.26 a 1221.50 322.50 o 489.50 356.50 67.00 154.50 302.50 379.50 k 998.50 0.00 z 6859.26
1983 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 18.00 210.00 416.00 g 1013.08 d 1719.00 2960.08
1984 1195.00 h 690.50 j 1411.50 676.50 f 597.00 192.50 26.00 r 5.00 z 270.50 489.80 a 982.24 a 988.50 h 3943.54
1985 1714.00 810.50 o 461.00 o 704.00 235.50 h 228.89 c 0.00 z 118.00 304.14 a 474.50 g 0.00 z 1129.00 k 3069.03
1986 1512.91 c 1395.00 711.50 n 647.40 e 404.60 b 153.00 g 31.00 33.00 276.00 628.00 1118.28 a 212.00 y 6046.19
1987 1358.50 1068.00 993.03 a 570.00 a 393.00 59.00 19.50 58.12 c 146.00 694.50 880.50 779.50 j 6240.16
1988 1700.83 e 1597.07 a 749.00 l 559.00 f 279.50 93.62 a 9.00 58.50 197.59 a 759.50 978.50 1401.50 7075.61
1989 1431.68 a 1633.00 0.00 z 459.50 k 415.50 192.50 18.50 26.00 166.00 584.00 691.50 m 1711.50 6178.68
1990 1346.50 1348.50 1125.00 696.00 540.00 127.00 19.00 27.00 172.50 0.00 z 691.00 f 802.50 j 5401.50
1991 1663.50 1202.38 b 1164.00 673.50 141.00 r 128.50 41.50 i 41.00 294.50 671.50 1157.00 1408.00 8403.88
1992 1446.50 1233.50 1197.00 826.50 372.50 225.00 176.50 125.50 181.50 i 659.50 1005.50 1357.00 8625.00
1993 1558.50 1350.50 1184.00 886.50 489.00 266.50 53.00 50.00 385.50 700.50 1067.00 1347.00 9338.00
1994 1935.00 1601.00 1139.50 773.50 456.50 138.00 70.50 89.00 156.00 510.50 857.50 1212.50 8939.50
1995 1454.00 1389.50 1164.00 923.50 451.00 152.50 44.50 17.00 298.00 585.50 1204.00 1503.00 9186.50
1996 1805.00 1535.00 1437.50 947.50 574.50 220.50 105.50 26.50 239.00 581.00 1156.00 1436.00 10064.00
1997 1671.50 1329.50 1287.00 850.50 627.00 127.50 70.00 116.50 173.50 567.50 1058.00 1136.50 9015.00
1998 1406.50 958.50 1120.00 648.50 319.50 174.00 21.50 3.50 126.50 491.50 848.00 1266.00 7384.00
1999 1631.50 1161.00 1097.50 691.50 355.50 128.50 27.50 38.50 236.00 641.00 765.00 1252.92 a 8026.42
2000 1572.50 1237.50 931.00 798.00 385.50 235.00 56.00 32.50 253.00 468.50 928.50 1139.00 i 6898.00
2001 1380.00 1501.00 1223.31 e 726.00 344.50 171.00 43.00 11.00 258.00 579.50 681.00 1149.50 8067.81
2002 1327.00 1119.00 1374.00 790.50 569.00 185.00 15.50 34.50 194.50 760.00 1023.00 1241.50 8633.50
2003 1600.00 1522.00 1294.50 848.00 486.00 225.50 56.00 26.00 195.00 598.50 1000.50 1265.50 9117.50
2004 1725.50 1341.50 1108.00 783.50 570.00 236.50 84.50 147.00 163.00 534.00 837.00 1387.00 8917.50
2005 1664.00 1186.00 1297.00 681.00 509.50 149.50 64.50 46.50 150.50 522.50 918.00 1316.50 8505.50
2006 1171.50 1351.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 40.00 310.00 0.00 z 894.00 1168.00 4934.50
2007 1403.00 1556.50 1060.50 827.00 385.50 116.00 56.50 38.00 208.50 488.00 932.00 1422.00 8493.50
2008 1526.00 1559.50 1351.00 822.50 590.00 203.00 72.00 71.00 237.50 600.00 966.50 1598.50 9597.50
2009 1844.50 1322.00 1239.00 786.00 438.00 236.00 0.00 z 101.00 95.00 727.00 767.00 1430.00 8985.50
2010 1478.50 1319.50 931.00 610.50 381.00 161.00 10.50 27.50 357.50 514.50 931.00 1393.50 8116.00
2011 1653.00 1330.50 1225.50 770.50 549.50 262.00 28.50 16.00 249.50 514.00 881.50 1207.50 8688.00
2012 1375.00 1159.00 800.50 739.50 360.50 111.00 7.50 34.00 260.00 485.50 h 0.00 z 0.00 z 4847.00
Period of Record Statistics
MEAN 1573.61 1365.28 1195.37 783.84 499.45 210.20 60.18 63.62 246.06 564.41 946.20 1349.80 8823.37
S.D. 167.71 154.15 141.27 92.60 99.91 65.07 34.63 39.19 65.07 99.07 104.55 136.33 514.40
SKEW 0.17 -0.28 -0.56 0.18 -0.12 0.28 0.85 0.53 0.14 -0.24 0.27 0.62 0.10
MAX 1938.50 1681.50 1437.50 1020.00 685.50 364.50 176.50 154.50 386.50 760.00 1204.00 1719.00 10104.60
MIN 1171.50 958.50 800.50 570.00 279.50 59.00 7.50 3.50 95.00 265.00 681.00 1096.50 7384.00
NO YRS 63 59 60 60 63 64 61 67 67 61 63 57 41