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 201303
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
1908 40.00 z 0.00 z 0.00 z 0.00 z 0.00 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 730.50 k 47.50 z 0.00
1949 1792.04 e 1690.89 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3482.93
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 214.93 a 86.79 b 2.58 a 10.00 249.50 562.00 1321.55 a 1865.54 c 4312.89
1956 1784.00 1635.50 1418.52 b 847.50 367.00 23.04 b 44.95 a 42.76 b 308.50 411.00 1055.17 a 1481.80 a 9419.73
1957 2005.91 b 1485.50 1318.57 b 692.78 c 352.50 105.50 0.00 z 48.00 304.82 b 586.00 805.00 f 1463.95 b 8363.53
1958 1568.94 d 1551.41 a 1140.91 c 602.50 314.50 227.07 a 47.53 a 65.00 205.50 543.02 a 1014.83 a 1754.08 a 9035.29
1959 1964.76 b 1611.50 1121.54 c 704.50 289.85 a 89.48 a 25.32 a 19.67 e 256.03 a 746.00 1394.48 a 1265.32 a 9488.45
1960 1809.22 b 1523.04 b 1519.50 716.90 a 345.65 a 122.14 b 30.00 20.50 244.00 546.50 999.00 1612.55 c 9489.00
1961 1797.48 a 1242.00 989.50 876.00 417.00 65.50 20.50 14.98 a 298.00 545.08 a 1059.00 1669.35 a 8994.40
1962 1857.00 1565.50 1247.75 a 790.50 295.50 123.62 a 32.60 b 43.40 a 296.00 477.50 936.00 1498.16 b 9163.53
1963 2020.00 1644.74 a 1099.43 b 639.50 398.35 a 73.50 12.00 49.50 176.50 277.50 888.50 1860.00 b 9139.52
1964 1578.42 a 1438.00 986.50 h 662.50 231.50 119.42 d 0.50 i 98.50 g 159.50 k 610.46 e 496.50 m 1005.50 m 4640.30
1965 1180.00 l 897.00 n 1050.50 k 446.50 k 187.50 i 62.50 j 17.50 j 37.50 g 284.50 j 532.54 c 594.00 l 974.50 i 532.54
1966 1167.50 n 763.50 n 697.50 j 830.50 457.50 66.50 i 0.00 v 39.00 t 248.08 d 634.50 662.00 m 870.50 n 2170.58
1967 1207.00 j 965.50 l 845.50 j 754.00 509.50 70.50 g 32.50 j 73.37 a 212.50 671.31 b 1080.00 a 911.50 l 3300.68
1968 1085.00 l 778.50 n 993.00 646.80 e 400.70 d 74.00 h 48.29 e 35.50 j 143.50 l 510.93 d 721.00 h 785.00 o 2599.72
1969 975.50 n 958.00 i 889.50 j 610.56 c 308.28 d 110.50 j 34.00 j 12.00 f 210.58 d 496.50 k 761.00 h 961.50 j 1129.41
1970 1380.00 j 847.00 m 867.00 k 726.35 d 321.50 f 42.00 h 3.32 c 35.28 b 273.50 457.00 f 707.50 k 1169.00 i 1038.44
1971 1226.00 m 942.50 j 1004.50 i 627.78 c 417.93 d 46.50 h 45.50 j 59.50 i 195.50 h 282.50 m 714.00 i 977.00 l 1045.70
1972 1405.50 j 1202.50 j 1000.00 h 504.00 j 178.00 h 56.50 l 22.00 l 65.00 h 228.00 j 386.50 o 873.50 g 1809.50 1809.50
1973 1710.00 1447.50 918.00 702.50 37.00 y 74.00 g 33.00 33.50 342.00 0.00 z 1062.50 1601.67 a 7850.67
1974 1877.50 1580.50 1333.50 738.50 478.50 119.00 13.00 119.50 452.50 674.50 1064.50 1402.00 9853.50
1975 1760.00 1592.50 1524.00 952.00 268.50 125.00 22.22 a 84.50 389.00 608.00 1051.50 1685.37 a 10062.58
1976 1936.00 1341.50 1308.00 553.00 373.00 79.50 37.00 86.00 325.50 845.00 1306.50 1890.00 10081.00
1977 2200.00 1388.59 a 1019.50 539.50 128.50 96.50 41.50 203.50 332.50 711.89 c 1203.50 1768.55 a 9634.04
1978 2041.50 1737.50 794.00 o 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3779.00
1979 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1980 0.00 z 474.00 t 1468.88 a 618.50 260.50 144.50 28.50 72.50 363.00 771.00 1035.50 1621.30 a 6384.18
1981 1680.00 1351.00 1051.00 669.00 367.00 115.50 47.00 60.50 333.50 753.50 922.00 1595.50 8945.50
1982 2259.50 1641.00 1368.00 848.50 252.50 210.00 24.50 113.00 350.50 633.50 1243.50 1450.50 10395.00
1983 1688.50 1312.50 1160.00 801.50 469.50 133.00 17.00 5.50 311.50 616.50 1011.50 2058.50 9585.50
1984 1810.50 1157.00 1325.00 571.00 356.50 62.50 22.50 26.00 427.50 546.50 1090.50 1647.50 9043.00
1985 1887.50 1649.00 1026.00 567.00 210.00 187.50 19.50 106.00 332.00 692.50 1335.00 1961.50 9973.50
1986 1629.00 1535.50 1131.00 581.00 301.50 82.00 16.50 113.50 286.50 607.50 1240.00 1450.00 8974.00
1987 1569.00 1077.50 1006.00 495.50 257.30 a 63.50 17.50 60.00 202.00 747.50 925.50 1368.50 7789.80
1988 1908.00 1672.68 a 1149.50 650.00 133.00 37.50 11.00 51.00 253.00 762.50 1121.50 1610.00 9359.68
1989 1659.00 1796.50 1359.00 726.00 307.00 0.00 z 0.00 35.00 241.00 612.00 1231.50 1854.00 9821.00
1990 1399.50 1398.50 1072.00 700.00 368.00 72.00 33.00 45.00 229.50 672.50 981.50 1652.00 8623.50
1991 1823.00 1255.00 1105.50 584.00 232.50 31.50 22.50 27.50 321.50 723.50 1308.50 1521.00 8956.00
1992 1490.50 1213.00 1101.00 762.50 282.00 176.00 124.50 128.50 283.00 669.50 1137.50 1593.00 8961.00
1993 1768.00 1469.00 1211.00 746.50 364.00 164.50 38.00 55.00 423.50 725.00 1207.00 1523.50 9695.00
1994 2143.00 1631.50 1100.00 692.00 254.00 55.50 33.50 93.50 194.50 508.00 960.00 1398.00 9063.50
1995 1667.50 1544.00 1112.00 835.00 358.00 63.00 19.50 8.00 291.00 645.00 1290.50 1627.00 9460.50
1996 2044.00 1617.79 a 1444.00 841.50 380.00 77.50 28.00 18.50 255.00 619.00 1288.00 1759.00 10372.29
1997 1906.00 1412.00 1248.00 747.50 444.00 21.00 63.50 80.50 176.00 584.00 1214.00 1279.00 9175.50
1998 1590.50 991.50 1165.00 573.00 168.00 154.50 13.50 15.00 156.50 543.00 983.50 1434.00 7788.00
1999 1822.00 1208.00 1085.50 659.00 264.50 115.50 11.00 40.00 299.50 676.50 844.50 1380.50 8406.50
2000 1738.50 1306.50 921.00 721.00 288.00 169.50 36.00 35.50 314.00 545.50 1083.50 1955.50 9114.50
2001 1536.00 1734.50 1288.00 695.50 271.00 100.86 a 24.00 22.00 268.50 657.50 742.50 1307.00 8647.36
2002 1479.00 1180.00 1460.50 772.00 494.00 53.50 16.00 36.50 211.00 841.00 1113.00 1366.50 9023.00
2003 1709.50 1546.50 1257.50 676.50 328.00 99.00 19.00 12.00 251.50 594.50 1164.50 1359.50 9018.00
2004 1874.00 1439.50 1106.50 652.00 443.00 169.50 61.00 167.50 143.00 568.50 935.50 1517.00 9077.00
2005 1851.00 1292.00 1228.00 543.50 397.00 15.00 27.00 47.00 173.50 528.50 985.50 1463.50 8551.50
2006 1272.00 1520.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 716.00 1005.50 1273.50 5787.00
2007 1547.00 1620.50 1044.00 730.50 210.00 34.50 14.50 67.00 242.50 504.00 1040.00 1700.00 8754.50
2008 1796.00 1633.50 1315.00 809.50 421.00 100.00 15.50 30.50 238.00 620.50 1022.50 1797.50 9799.50
2009 2035.50 1440.50 1255.00 706.00 363.00 143.50 74.83 b 85.00 103.00 0.00 z 844.50 1647.50 8698.33
2010 1762.50 1453.50 908.50 471.50 344.50 89.50 1.50 32.00 325.00 521.00 1052.00 1629.00 8590.50
2011 1873.00 1471.50 1327.50 735.50 364.00 114.00 8.50 14.00 273.50 490.50 989.00 1307.50 8968.50
2012 1479.00 1258.00 780.00 628.50 253.50 55.50 0.00 44.00 275.00 679.50 1019.00 1490.50 7962.50
2013 1703.50 1474.00 1370.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4547.50
Period of Record Statistics
MEAN 1777.64 1464.89 1189.40 692.79 328.94 101.50 27.72 56.19 273.48 617.39 1080.97 1588.05 9160.89
S.D. 205.66 183.31 174.29 102.72 90.54 50.74 22.00 42.09 73.01 107.10 146.61 200.60 616.01
SKEW 0.02 -0.51 0.01 0.11 -0.11 0.42 2.06 1.41 0.17 -0.32 0.19 0.33 -0.15
MAX 2259.50 1796.50 1524.00 952.00 509.50 227.07 124.50 203.50 452.50 845.00 1394.48 2058.50 10395.00
MIN 1272.00 991.50 780.00 471.50 128.50 15.00 0.00 5.50 103.00 277.50 742.50 1265.32 7788.00
NO YRS 49 49 47 52 51 45 47 48 50 50 47 48 40