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
1893 1827.50 1371.50 1100.50 643.33 c 354.00 16.61 b 0.00 a 41.13 e 192.50 442.02 b 904.14 a 1401.31 d 8294.54
1894 1319.88 e 1359.68 c 818.50 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 3498.06
1895 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1896 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1897 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1898 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1899 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1900 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1901 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1904 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
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 0.00 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 39.50 243.50 386.95 c 837.93 a 1253.00 2760.88
1950 1370.50 1254.50 1167.00 747.00 199.50 j 58.50 24.50 83.50 156.00 349.50 1051.50 1561.50 7824.00
1951 1652.00 1313.50 1198.50 674.50 224.00 108.75 b 31.50 62.00 262.50 507.00 1178.50 1415.50 8628.25
1952 1432.20 a 1145.50 a 1170.00 529.00 319.00 54.50 11.00 49.50 211.00 720.50 842.50 1214.00 7698.70
1953 1356.50 1172.89 a 983.00 709.50 288.50 33.50 19.50 19.00 200.00 340.50 776.00 1171.50 7070.39
1954 1460.50 929.50 1081.50 493.00 427.50 62.00 4.00 32.50 163.50 504.00 851.00 1334.55 a 7343.55
1955 1474.00 1298.00 1101.00 396.50 216.50 89.50 0.00 17.00 175.00 440.50 1033.50 1485.50 7727.00
1956 1437.00 1320.00 1215.00 708.50 310.00 45.00 13.50 28.50 220.50 301.50 910.50 1246.50 7756.50
1957 1665.00 1094.00 1021.50 543.50 335.00 49.50 4.00 33.00 216.00 576.00 913.50 1167.00 7618.00
1958 1373.50 1378.50 1020.50 582.00 244.50 138.50 25.00 47.00 161.50 404.00 843.50 1564.50 7783.00
1959 1771.50 1430.59 a 1171.00 591.50 171.50 51.00 23.00 2.00 176.50 610.00 1176.50 1071.50 8246.59
1960 1364.00 1296.00 1422.50 518.00 277.00 84.50 33.50 15.00 164.00 500.50 819.00 1364.00 7858.00
1961 1503.50 1037.50 960.50 723.50 335.00 62.00 12.00 10.33 a 206.90 a 431.00 877.50 1444.00 7603.73
1962 1624.00 1365.00 1126.50 608.50 185.00 63.50 35.00 19.00 282.00 416.00 871.50 1368.50 7964.50
1963 1854.00 1465.50 996.00 520.50 322.50 56.50 10.00 53.50 155.50 209.00 744.50 1639.00 8026.50
1964 1247.00 1163.00 1087.50 521.00 140.00 74.50 16.00 72.00 221.50 546.50 778.00 1443.50 7310.50
1965 1570.00 1346.50 1240.00 646.00 176.00 83.00 19.00 73.00 238.50 475.00 853.00 1074.00 7794.00
1966 1765.00 1264.50 893.00 677.00 418.00 89.00 12.50 58.50 262.50 541.50 859.00 1342.50 8183.00
1967 1361.00 1454.50 1002.50 572.00 460.50 50.00 50.00 102.00 233.50 557.00 987.00 1228.50 8058.50
1968 1440.00 1351.50 802.50 525.00 349.50 83.50 35.00 64.00 170.50 469.00 893.50 1365.50 7549.50
1969 1618.50 1211.00 1224.50 531.00 275.50 217.00 12.00 6.00 219.00 604.00 950.00 1345.50 8214.00
1970 1751.50 1258.96 a 1099.50 559.00 247.00 78.50 19.00 24.00 185.00 435.00 885.00 1369.00 7911.46
1971 1720.00 1300.00 1158.50 614.50 345.50 28.00 41.00 56.50 157.00 304.50 874.00 1211.00 7810.50
1972 1657.50 1426.00 1154.00 724.00 207.00 112.00 47.50 46.50 199.50 646.50 962.00 1522.50 8705.00
1973 1335.00 1189.00 773.50 657.50 374.50 23.00 3.00 20.50 216.00 367.00 903.50 1425.00 7287.50
1974 1458.00 1337.00 1046.50 545.00 383.76 b 126.00 6.72 a 49.00 311.00 525.50 874.14 a 1224.50 7887.11
1975 1397.00 1280.50 1277.00 791.50 229.00 83.50 37.00 18.00 303.50 491.72 b 783.75 b 1253.50 7945.97
1976 1602.00 1127.50 974.00 526.00 344.00 48.50 13.50 57.50 258.00 684.00 1152.50 1670.50 8458.00
1977 1958.50 1224.00 817.50 441.72 a 117.00 87.50 11.00 102.50 176.50 571.00 963.50 1472.00 7942.72
1978 1786.00 1542.50 1171.00 661.00 304.50 92.50 34.50 39.50 155.00 595.00 979.00 1456.50 8817.00
1979 1918.00 1579.00 1113.50 751.00 355.00 67.00 19.50 61.50 195.50 643.00 979.50 1225.00 8907.50
1980 1564.50 1490.50 1226.50 629.00 246.50 84.00 4.00 10.50 185.50 671.50 873.50 1381.57 a 8367.57
1981 1449.00 1155.50 927.50 514.00 314.50 48.62 a 22.50 43.00 232.50 580.50 855.00 1347.50 7490.12
1982 1827.50 1324.00 1109.50 705.50 151.50 158.50 4.00 74.50 240.00 471.00 925.00 1109.50 8100.50
1983 1344.50 1068.00 977.50 709.00 393.00 66.50 10.00 3.50 200.00 535.00 843.50 1701.50 7852.00
1984 1578.00 1002.50 1199.50 608.50 375.50 23.00 25.50 27.50 106.00 l 132.00 y 824.48 a 1198.50 6862.98
1985 1586.50 1281.50 808.00 379.66 a 155.00 104.00 15.00 71.50 254.50 540.00 1118.00 1764.00 8077.66
1986 1514.50 1333.00 891.50 476.50 209.50 76.00 6.00 91.50 194.50 552.00 1071.00 1284.50 7700.50
1987 1372.50 1031.00 905.72 a 506.50 225.00 33.75 b 6.00 74.50 191.38 a 704.50 802.00 1197.78 b 7050.62
1988 1661.50 1417.89 a 978.00 618.00 154.00 53.00 3.50 31.00 153.50 741.50 877.00 1332.00 8020.89
1989 1229.50 1477.00 1147.00 658.00 319.30 a 93.50 8.00 39.00 254.50 520.00 1047.50 1663.50 8456.80
1990 1121.50 1157.00 830.00 570.00 379.50 52.00 24.00 27.00 188.00 594.00 770.00 1382.00 7095.00
1991 1613.50 1123.50 948.50 532.00 212.50 25.00 13.00 27.00 265.00 544.00 1090.00 1258.50 7652.50
1992 1277.00 1075.50 1003.50 687.00 278.00 111.50 67.50 118.50 242.50 582.00 991.50 1312.50 7747.00
1993 1450.50 1306.50 1123.00 754.00 276.50 102.50 6.00 m 24.00 346.50 621.50 996.50 1281.50 8283.00
1994 1845.00 1479.50 1017.50 579.00 303.50 67.50 36.00 119.50 175.50 500.50 843.50 1135.00 8102.00
1995 1463.50 1210.00 927.50 739.00 319.50 33.00 23.00 2.50 297.50 568.00 1211.00 1505.00 8299.50
1996 1668.00 1409.50 1253.50 775.50 478.50 95.50 67.50 73.00 253.50 504.50 1108.50 1339.00 9026.50
1997 1578.00 1168.00 998.00 671.50 427.00 55.50 39.50 86.00 188.50 532.50 1001.50 1162.50 7908.50
1998 1331.50 907.50 1031.50 561.00 171.00 130.00 12.00 10.50 135.50 492.00 804.50 1155.50 6742.50
1999 1628.50 1014.00 1036.50 563.50 242.50 77.00 1.07 b 44.00 274.00 624.00 758.00 1306.50 7569.57
2000 1484.50 1103.00 837.50 675.00 282.00 116.00 39.00 27.00 250.00 477.50 962.59 a 1726.70 a 7980.79
2001 1396.50 1316.50 1094.00 490.00 227.85 a 115.50 18.50 19.00 273.50 588.50 631.00 1149.00 7319.85
2002 1233.00 986.00 1115.50 583.00 353.50 49.50 3.50 11.50 120.00 610.50 921.00 1174.50 7161.50
2003 1497.00 1346.50 1021.50 624.00 312.00 79.50 10.50 3.00 188.00 510.00 864.50 1188.00 7644.50
2004 1548.00 1231.50 848.50 560.50 282.50 91.00 20.50 108.00 109.50 479.50 779.50 1270.50 7329.50
2005 1484.50 1024.00 1060.00 470.00 333.50 12.50 15.50 18.50 103.50 476.50 856.50 1403.50 7258.50
2006 1069.50 1226.00 976.50 436.00 278.50 43.00 2.00 7.00 230.00 623.00 788.00 1081.00 6760.50
2007 1284.00 1430.00 885.00 637.00 185.00 30.00 6.50 12.50 142.00 319.00 905.50 1394.00 7230.50
2008 1474.50 1472.00 1164.50 587.00 338.00 39.00 3.50 22.00 126.50 535.50 869.00 1541.50 8173.00
2009 1731.50 1180.50 1008.00 630.00 240.00 79.50 49.50 55.00 115.50 659.50 711.00 1370.50 7830.50
2010 1552.00 1245.00 847.50 407.50 261.50 25.00 2.00 14.00 199.00 443.50 825.00 1487.50 7309.50
2011 1553.50 1272.44 a 1087.07 a 647.07 a 342.50 63.50 2.07 a 13.50 249.00 459.50 806.00 1130.50 7626.65
2012 1310.50 1067.00 530.50 564.00 169.50 52.50 1.03 a 12.00 p 219.00 j 373.00 i 0.00 z 0.00 z 3695.03
Period of Record Statistics
MEAN 1519.92 1255.69 1033.92 598.13 285.32 71.94 18.82 42.39 207.44 518.36 906.88 1344.79 7821.44
S.D. 192.78 156.10 151.05 97.19 83.95 36.79 16.16 30.82 52.56 108.19 120.39 169.23 500.07
SKEW 0.14 -0.19 -0.41 -0.10 0.06 1.12 1.12 0.76 0.21 -0.40 0.61 0.55 0.16
MAX 1958.50 1579.00 1422.50 791.50 478.50 217.00 67.50 119.50 346.50 741.50 1211.00 1764.00 9026.50
MIN 1069.50 907.50 530.50 379.66 117.00 12.50 0.00 2.00 103.50 209.00 631.00 1071.50 6742.50
NO YRS 65 65 65 64 63 64 63 64 63 63 64 64 60