date! ,

Monthly Total Heating Degree Days

(a vali)

Base Temperature = 65 F

File last updated on Apr 4, 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
1903 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 36.00 71.00 270.50 490.00 1097.00 1609.00 3573.50
1904 1793.00 1753.98 a 1208.48 a 777.00 283.65 a 113.50 42.00 42.88 a 216.00 495.00 813.50 1488.00 9027.00
1905 1807.00 1519.00 947.50 666.50 450.00 103.00 28.50 12.50 112.50 573.50 c 0.00 z 0.00 z 6220.00
1906 1495.00 1421.50 1428.00 516.50 309.00 89.50 26.50 29.00 142.50 577.50 1138.50 924.00 m 7173.50
1907 1927.00 1355.50 1051.00 920.00 601.50 128.00 6.50 79.00 0.00 z 0.00 z 1007.50 1272.11 c 8348.11
1908 1445.00 0.00 z 0.00 z 567.00 372.50 124.50 35.50 71.00 133.00 621.50 1004.00 1406.00 5780.00
1909 1696.00 1405.00 1174.50 956.50 0.00 z 81.50 30.00 21.81 d 0.00 z 0.00 z 0.00 z 1844.00 7209.31
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 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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1950 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
1951 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
1952 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
1953 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
1954 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
1955 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 77.00 2.00 11.50 202.50 461.00 1326.50 1770.21 b 3850.71
1956 1702.50 1515.77 a 1205.38 a 774.83 a 256.50 11.00 17.00 41.85 a 248.28 a 352.50 997.50 1288.00 8411.11
1957 1815.05 a 1274.54 b 1096.50 637.24 a 325.50 a 66.50 0.00 34.50 226.50 546.50 971.00 1220.50 8214.33
1958 1355.50 1401.00 1120.00 598.00 173.00 161.50 28.00 24.80 a 130.00 404.00 949.00 1549.50 7894.30
1959 1708.32 c 1436.81 a 934.50 576.00 241.59 b 43.50 9.00 2.50 205.50 736.77 a 1303.50 843.00 j 7197.99
1960 1674.53 b 1514.98 b 1485.00 648.50 256.00 68.50 16.00 10.50 222.00 503.50 933.50 1469.50 8802.52
1961 1586.50 1156.50 916.57 a 760.00 356.50 47.00 2.00 11.00 319.62 d 484.00 1050.00 1263.00 g 6689.68
1962 0.00 z 0.00 z 0.00 z 35.50 z 186.60 e 69.00 36.00 12.73 c 224.00 427.00 838.80 e 1349.10 e 3143.22
1963 1855.35 a 1310.50 887.00 526.50 294.50 26.00 1.50 31.50 134.50 243.50 902.50 1743.75 a 7957.10
1964 1408.00 1243.50 1331.50 602.00 178.77 a 57.50 4.50 74.50 251.50 509.00 1047.50 1680.00 8388.27
1965 1753.71 c 1485.56 a 1489.07 b 683.50 243.00 28.50 5.00 39.00 482.50 434.00 994.00 1210.00 8847.84
1966 1905.39 c 1464.50 982.50 795.00 358.00 55.80 e 0.00 74.00 209.50 273.50 n 1101.50 1462.00 8408.19
1967 1530.50 1504.00 1012.15 a 627.00 411.50 64.00 36.50 44.36 b 138.00 564.00 1016.50 1398.00 8346.51
1968 1581.00 1477.00 778.00 573.00 380.00 66.00 22.00 41.50 172.00 531.00 982.50 1593.00 8197.00
1969 1900.09 b 1348.50 1062.00 j 555.00 237.50 182.50 9.50 4.50 118.00 g 699.00 938.50 1405.50 7280.59
1970 1877.00 1306.50 1245.00 668.00 232.50 36.50 7.00 6.00 196.50 564.50 1094.00 1536.50 8770.00
1971 1831.00 1348.00 1085.50 553.50 308.50 31.00 36.50 22.50 183.21 b 479.50 1009.00 1548.50 8436.71
1972 1767.52 a 1589.00 1157.00 707.50 245.50 60.00 28.00 58.00 203.00 635.00 1067.50 1668.50 9186.52
1973 1511.50 1244.50 862.00 658.50 281.00 45.00 4.00 0.50 211.55 a 333.25 a 985.50 1563.43 a 7700.74
1974 1653.00 1293.00 1091.00 560.00 355.00 70.86 a 0.50 46.50 237.50 429.00 985.50 1335.07 a 8056.93
1975 1550.57 d 1456.50 1309.00 844.00 204.00 72.50 13.00 9.50 252.50 447.00 940.50 1464.00 8563.07
1976 1663.15 a 1120.00 1066.00 430.50 254.50 33.50 0.50 0.00 z 72.50 w 675.00 1160.00 1598.00 8001.15
1977 1961.50 1163.50 954.00 397.00 66.50 21.50 4.00 44.50 162.00 543.50 1115.50 1638.00 8071.50
1978 1992.00 1592.00 1188.00 656.50 242.50 75.50 22.50 16.00 129.50 484.50 1092.00 1577.50 9068.50
1979 2013.00 1663.00 1250.50 772.00 423.00 62.50 8.00 47.50 110.50 570.00 1037.00 1165.50 9122.50
1980 1562.50 1453.50 1180.50 506.50 208.50 24.00 5.50 21.50 157.50 599.50 846.50 1434.50 8000.50
1981 1389.00 1174.00 869.50 420.00 276.50 36.00 17.50 16.00 150.50 557.50 839.50 1566.00 7312.00
1982 2035.00 1382.00 1133.00 676.00 207.50 128.00 0.00 32.00 207.50 533.50 1109.50 1270.50 8714.50
1983 1416.00 1119.50 1078.50 756.50 340.50 81.50 4.50 0.00 199.00 541.50 1029.50 2010.00 8577.00
1984 1568.00 1084.00 1306.00 629.50 315.50 39.00 10.00 7.50 295.00 507.00 911.00 1545.00 8217.50
1985 0.00 z 1359.00 929.00 443.00 136.50 126.50 7.50 63.00 286.00 552.00 1367.00 1792.00 7061.50
1986 1450.00 1456.00 976.50 576.00 242.50 37.50 0.00 57.50 226.00 512.50 1151.50 1223.50 7909.50
1987 1316.50 925.50 934.00 359.50 118.50 30.00 6.50 61.50 155.50 667.00 853.00 1303.50 6731.00
1988 1777.50 1549.00 1010.50 537.50 104.50 3.00 1.50 36.00 152.50 635.50 1016.00 1373.50 8197.00
1989 1353.00 1638.50 1232.50 612.50 252.00 82.00 0.00 11.00 202.50 502.50 1115.50 1732.00 8734.00
1990 1188.00 1186.00 936.00 618.00 298.50 54.50 22.00 27.50 142.00 567.50 897.50 1574.50 7512.00
1991 1632.50 1063.50 994.00 497.50 234.00 19.00 20.50 10.00 221.00 585.50 1224.00 1268.50 7770.00
1992 1344.00 1096.50 931.00 705.00 211.50 102.50 88.00 100.00 205.00 571.50 1141.00 1544.50 8040.50
1993 1675.50 1488.00 1205.50 697.00 301.00 124.00 12.50 37.00 314.00 597.50 1128.50 1444.50 9025.00
1994 1980.50 1572.00 986.50 606.00 194.50 43.50 17.50 62.00 154.00 470.50 894.50 1312.00 8293.50
1995 1537.00 1280.00 1053.00 795.50 339.00 67.50 19.50 6.00 246.50 616.50 1175.50 1477.00 8613.00
1996 1821.00 1359.00 1310.00 738.50 398.00 49.50 15.50 7.50 258.50 513.00 1335.50 1772.00 9578.00
1997 1824.50 1326.50 1206.00 748.50 396.00 7.50 35.00 43.50 141.50 520.50 1152.00 1254.50 8656.00
1998 1518.00 984.00 1244.00 532.50 141.50 116.00 2.50 4.50 97.50 500.00 967.00 1288.50 7396.00
1999 1683.00 652.50 j 222.00 y 570.60 e 289.52 c 66.50 n 6.72 a 10.50 h 241.55 a 562.65 a 697.00 1268.33 b 5319.36
2000 1029.00 k 1075.50 815.00 655.18 b 214.00 102.50 37.72 a 21.50 249.31 a 487.00 1161.50 1875.00 6694.21
2001 1500.50 1618.50 1307.00 665.00 276.50 101.50 8.50 17.00 215.00 609.50 684.00 1306.50 8309.50
2002 1428.50 1083.50 1491.50 723.50 462.00 53.50 6.00 33.00 187.50 832.00 1040.00 1301.50 8642.50
2003 1616.50 1511.50 1175.50 598.00 348.00 98.00 2.00 16.50 251.50 499.00 1166.50 1313.50 8596.50
2004 1718.50 1397.00 960.50 596.50 391.00 149.00 37.50 114.50 154.50 558.00 879.00 1357.00 8313.00
2005 1691.57 a 1161.00 1114.00 503.00 363.50 28.00 16.00 27.00 129.00 534.50 951.00 1493.50 8012.07
2006 1244.00 1388.00 1112.00 499.50 291.50 46.00 7.00 22.00 308.50 676.50 970.00 1234.00 7799.00
2007 1529.00 1573.50 992.00 745.50 195.50 46.50 8.00 48.00 202.50 461.50 980.50 1562.50 8345.00
2008 1705.00 1540.50 1228.00 786.00 383.00 79.50 9.50 12.50 179.50 589.50 1024.50 1741.00 9278.50
2009 1833.00 1376.00 1207.50 723.50 321.00 138.00 42.00 69.00 99.50 811.50 761.50 1650.75 a 9033.25
2010 1735.50 1477.00 962.50 415.50 327.00 50.50 0.50 10.00 264.00 485.00 1016.50 1656.50 8400.50
2011 1846.50 1483.50 1354.50 723.00 388.50 109.50 2.00 13.00 260.50 468.00 951.00 1266.00 8866.00
2012 1398.50 1218.00 707.50 547.00 240.50 47.50 0.00 51.15 a 222.50 674.50 994.00 1477.50 7578.65
2013 1589.50 1427.00 1415.50 42.50 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 4432.00
Period of Record Statistics
MEAN 1650.29 1363.79 1110.24 632.50 286.07 69.76 15.19 33.27 204.99 542.17 1021.13 1484.32 8357.43
S.D. 204.26 182.56 182.65 124.69 95.59 39.84 15.87 25.64 66.08 101.65 140.70 193.61 563.94
SKEW -0.12 -0.34 0.19 0.13 0.36 0.67 1.78 0.94 1.16 0.22 0.13 0.45 -0.35
MAX 2035.00 1753.98 1491.50 956.50 601.50 182.50 88.00 114.50 482.50 832.00 1367.00 2010.00 9578.00
MIN 1188.00 925.50 707.50 359.50 66.50 3.00 0.00 0.00 97.50 243.50 684.00 1165.50 6731.00
NO YRS 61 61 60 62 62 63 65 63 61 62 63 61 49