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
1893 1901.00 1529.00 1157.16 b 695.50 329.00 4.00 0.00 46.50 173.50 403.00 984.83 a 1509.00 8732.48
1894 1532.50 1375.00 0.00 z 471.50 210.50 46.00 6.50 0.00 175.50 516.50 1095.52 a 1112.50 6542.02
1895 1750.00 1483.00 1026.50 367.00 270.22 a 46.50 6.00 11.50 135.50 686.50 1031.00 1358.00 8171.72
1896 1397.50 1197.50 1126.00 383.50 98.00 42.50 13.50 8.00 257.59 a 595.00 1175.50 1151.00 7445.59
1897 1586.50 1216.50 1148.55 a 565.34 a 0.00 z 7.00 t 4.65 a 58.00 88.00 346.50 1020.00 1613.50 7647.54
1898 1348.50 1239.50 913.00 587.50 234.50 13.50 15.00 21.50 110.00 576.00 1045.86 a 1566.00 7670.86
1899 1520.00 1566.50 1378.50 531.50 207.18 a 12.50 6.50 1.50 203.50 347.50 688.50 1418.00 7881.68
1900 1322.00 1515.50 1205.38 a 438.00 149.50 28.50 5.50 0.00 171.00 259.00 1056.50 1272.00 7422.88
1901 1385.81 d 1455.48 a 1016.69 d 514.50 166.37 a 59.44 c 0.00 b 2.00 174.00 444.69 b 985.38 d 630.50 q 6204.37
1902 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
1903 1364.00 a 1266.50 831.50 510.00 b 180.00 120.50 16.00 57.50 243.50 496.00 1014.00 1604.77 a 7704.27
1904 1802.50 1662.50 1053.50 702.50 250.50 58.00 24.50 54.00 161.00 487.50 0.00 z 0.00 z 6256.50
1905 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
1906 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
1907 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
1908 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
1909 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
1910 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
1911 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
1912 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
1913 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
1914 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
1915 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
1916 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
1917 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
1918 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
1919 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
1920 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
1921 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
1922 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
1923 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
1924 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
1925 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
1926 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
1927 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
1928 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
1929 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
1930 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
1931 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
1932 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
1933 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
1934 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
1935 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
1936 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
1937 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
1938 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
1939 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
1940 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
1941 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
1942 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
1943 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
1944 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
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 249.50 30.00 1.00 12.00 82.24 a 456.50 809.00 1300.50 2940.74
1949 1492.00 1369.00 1030.50 515.00 162.50 12.00 0.00 9.00 222.00 350.50 791.50 1286.50 7240.50
1950 1590.00 1321.50 1177.00 762.50 223.50 56.00 10.00 48.00 129.00 302.50 1049.00 1600.00 8269.00
1951 1674.50 1300.00 1289.00 699.00 136.00 75.50 15.50 23.00 221.00 466.00 1114.00 1452.00 8465.50
1952 1522.50 1056.50 1092.00 498.00 260.00 23.00 1.00 18.50 147.00 630.50 858.00 1267.50 7374.50
1953 1388.50 1161.50 954.00 707.00 223.00 26.50 7.50 1.50 108.00 278.48 a 745.00 1190.50 6791.48
1954 1495.50 825.50 1033.00 413.00 326.00 46.00 0.00 4.50 79.00 455.00 747.00 1214.50 6639.00
1955 1427.50 1268.50 1029.00 301.50 114.00 49.50 0.00 3.50 95.00 404.50 1047.00 1477.00 7217.00
1956 1519.00 1315.50 1095.50 598.00 186.50 20.00 3.50 23.50 134.00 236.50 887.50 1221.00 7240.50
1957 1596.50 1035.50 977.50 475.00 218.50 30.50 0.00 4.50 155.00 503.00 934.00 1149.00 7079.00
1958 1336.00 1368.00 989.50 483.00 143.00 74.00 6.00 24.50 92.50 333.00 796.50 1470.50 7116.50
1959 1606.50 1377.50 1056.00 481.50 136.00 20.00 9.50 0.00 154.00 543.00 1146.00 1029.50 7559.50
1960 1356.50 1240.00 1370.50 470.69 a 192.50 39.50 3.50 4.00 132.50 416.00 765.50 1366.00 7357.19
1961 1493.00 1062.50 969.50 680.00 273.50 30.50 0.00 3.50 185.00 354.00 863.00 1444.50 7359.00
1962 1643.00 1309.00 1192.50 601.50 115.00 43.50 15.00 8.00 215.00 374.50 807.50 1326.00 7650.50
1963 1805.00 1393.00 899.00 451.00 228.00 14.00 4.50 25.00 101.50 163.00 746.50 1649.00 7479.50
1964 1270.00 1091.00 1104.00 501.00 100.50 42.00 0.50 50.00 172.00 508.00 822.00 1437.00 7098.00
1965 1603.00 1393.50 1355.50 600.50 127.50 22.00 1.00 32.50 207.50 398.50 847.50 1058.50 7647.50
1966 1775.00 1252.50 837.00 650.50 335.50 35.50 0.00 25.00 159.00 443.00 896.00 1318.00 7727.00
1967 1412.50 1364.50 885.00 497.50 345.00 16.00 33.50 39.50 160.00 491.50 967.00 1224.50 7436.50
1968 1465.50 1317.50 745.00 447.50 301.00 36.50 9.00 28.00 135.00 418.50 877.50 1387.00 7168.00
1969 1637.50 1227.50 1220.50 474.50 198.00 109.50 6.50 0.00 112.00 566.50 894.50 1375.50 7822.50
1970 1798.50 1280.50 1102.50 513.00 169.50 28.00 7.50 3.50 172.00 454.00 903.00 1396.00 7828.00
1971 1730.50 1322.00 1124.50 501.50 285.50 7.50 24.50 10.00 130.50 275.00 847.50 1286.50 7545.50
1972 1669.50 1418.00 1038.00 615.50 180.00 50.50 19.00 26.50 127.50 547.50 940.50 1539.50 8172.00
1973 1426.50 1134.00 721.00 585.00 273.00 2.50 0.00 3.50 129.00 266.00 834.00 1444.00 6818.50
1974 1527.00 1214.00 971.50 466.00 280.50 52.00 0.00 23.00 218.00 410.00 864.00 1256.50 7282.50
1975 1471.50 1279.50 1257.50 707.00 144.00 41.50 13.50 1.00 216.50 353.00 754.50 1244.00 7483.50
1976 1448.00 980.00 926.00 411.50 237.00 10.50 2.50 12.00 138.00 607.50 1091.00 1562.00 7426.00
1977 1910.00 1096.50 739.50 321.00 48.50 11.00 0.00 23.50 82.50 490.50 934.00 1466.00 7123.00
1978 1793.50 1489.00 1067.00 519.00 204.00 20.50 5.50 5.00 71.00 468.50 954.50 1495.00 8092.50
1979 1917.50 1537.00 1105.00 672.00 241.50 30.50 3.00 29.50 100.00 451.50 919.50 1137.00 8144.00
1980 1447.00 1370.50 1075.50 495.00 179.50 20.50 0.00 3.00 101.00 556.00 813.00 1304.50 7365.50
1981 1356.00 1089.00 804.50 385.00 231.50 11.00 14.50 19.00 122.50 499.50 780.00 1408.50 6721.00
1982 1849.00 1331.00 1064.00 653.00 109.50 70.00 0.00 32.50 160.00 404.00 941.00 1156.00 7770.00
1983 1313.50 1071.00 943.00 669.50 305.50 35.50 0.00 0.00 155.00 447.50 843.50 1791.50 7575.50
1984 1527.50 1025.50 1173.50 540.00 253.00 5.00 6.00 6.00 182.50 386.00 866.00 1291.00 7262.00
1985 1595.50 1322.50 826.50 375.50 87.00 65.00 2.00 22.50 208.00 455.50 1124.00 1750.00 7834.00
1986 1443.00 1312.50 850.00 403.00 151.50 8.50 3.50 37.00 94.50 421.50 1079.50 1300.50 7105.00
1987 1336.50 932.50 810.50 364.00 97.50 9.00 5.50 52.50 125.50 603.00 786.50 1221.50 6344.50
1988 1695.50 1486.00 940.00 547.00 82.00 11.50 4.00 18.50 101.00 661.50 915.50 1391.00 7853.50
1989 1233.50 1459.00 1085.00 544.50 238.00 48.50 0.00 5.00 186.00 425.00 1025.50 1625.00 7875.00
1990 1163.00 1117.50 833.50 538.50 276.50 48.00 9.00 5.50 109.50 473.00 742.00 1483.00 6799.00
1991 1640.50 1113.00 866.50 448.00 170.00 0.50 5.50 9.00 226.00 504.00 1128.50 1268.00 7379.50
1992 1284.50 1031.50 881.00 585.50 183.00 40.00 41.00 77.00 176.50 479.50 1002.50 1362.50 7144.50
1993 1503.00 1326.00 1131.00 632.00 222.50 74.50 0.00 19.50 286.00 514.00 964.00 1287.50 7960.00
1994 1802.50 1437.50 894.00 500.50 188.00 20.50 13.00 49.00 105.00 397.50 803.00 1259.50 7470.00
1995 1472.50 1208.00 895.50 617.50 244.00 28.00 11.50 0.00 201.00 482.50 1097.50 1345.50 7603.50
1996 1582.50 1287.00 1105.50 588.00 327.50 54.50 6.00 5.00 178.50 438.50 1152.00 1484.50 8209.50
1997 1625.00 1215.50 972.00 621.00 358.50 11.00 26.50 25.50 125.00 466.50 1034.50 1192.50 7673.50
1998 1357.50 917.00 989.00 438.50 77.00 81.00 0.00 0.50 58.00 420.00 804.00 1166.50 6309.00
1999 1585.00 977.50 913.00 472.50 163.50 50.50 0.50 8.00 192.00 455.70 a 698.50 1229.50 6746.20
2000 1437.50 1022.50 726.00 494.50 160.00 54.50 19.50 12.00 170.50 400.00 1049.50 1797.00 7343.50
2001 1423.50 1365.00 1136.50 374.00 157.50 54.00 2.50 1.00 145.50 439.00 499.00 1103.50 6701.00
2002 1113.00 960.50 1101.50 484.50 252.00 20.50 0.00 9.00 90.50 594.50 834.00 1080.00 6540.00
2003 1386.50 803.00 i 942.29 b 465.50 232.00 44.00 3.00 2.50 174.00 437.00 909.50 1181.50 5777.79
2004 1500.00 1245.00 781.00 438.00 181.50 51.50 12.50 72.00 70.00 414.00 766.50 1219.50 6751.50
2005 1500.00 1006.50 948.00 362.00 265.00 1.00 4.00 10.00 67.50 288.50 i 793.00 1490.00 6447.00
2006 1065.50 1174.00 911.50 357.50 211.50 27.00 0.00 0.00 187.50 384.00 h 814.50 1096.00 5845.00
2007 1413.50 1494.50 865.00 608.50 112.00 17.00 1.50 4.00 103.00 363.00 905.00 1463.50 7350.50
2008 1600.50 1447.50 1096.50 604.50 285.50 16.50 0.00 11.00 115.50 498.00 886.50 1608.26 b 8170.26
2009 1744.00 1181.00 932.00 555.00 229.50 85.00 24.50 30.00 76.00 643.50 672.00 1454.50 7627.00
2010 1665.00 1392.50 822.50 341.50 258.52 c 7.00 0.00 7.00 131.00 426.52 b 851.90 a 1532.50 7435.93
2011 1649.00 1274.00 1029.20 a 558.10 a 241.05 b 35.50 0.00 b 7.00 233.00 419.50 815.77 d 1178.00 c 7440.12
2012 1288.50 1075.50 486.00 453.00 123.50 28.50 0.00 29.50 183.00 560.67 b 804.83 a 1206.50 6239.50
2013 1411.50 1214.00 1214.50 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 3840.00
Period of Record Statistics
MEAN 1522.68 1255.87 1003.42 518.69 205.46 35.64 6.80 18.11 148.91 449.47 903.39 1356.82 7430.63
S.D. 185.75 176.03 164.62 105.87 71.67 24.75 8.57 18.56 50.62 101.30 134.45 177.45 517.32
SKEW 0.08 -0.18 -0.11 0.15 0.01 1.00 1.75 1.24 0.33 -0.12 -0.01 0.41 -0.11
MAX 1917.50 1662.50 1378.50 762.50 358.50 120.50 41.00 77.00 286.00 686.50 1175.50 1797.00 8732.48
MIN 1065.50 825.50 486.00 301.50 48.50 0.50 0.00 0.00 58.00 163.00 499.00 1029.50 6239.50
NO YRS 76 75 75 75 75 75 76 76 76 74 75 74 68