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
1893 0.00 z 1518.00 1233.00 730.50 336.50 0.00 z 0.00 z 0.00 z 190.00 473.00 1006.50 1530.00 7017.50
1894 1530.50 1379.50 887.00 479.50 239.00 32.00 2.00 21.00 158.50 522.00 0.00 z 1187.96 c 6438.96
1895 1788.00 1539.00 1117.00 457.00 271.00 23.50 17.50 11.50 143.00 699.00 1000.50 1353.00 8420.00
1896 1467.50 1248.50 1207.50 438.50 108.50 45.00 18.00 30.48 a 283.50 603.00 1156.50 1212.50 7819.48
1897 1591.00 1208.00 1188.00 566.00 279.00 111.00 3.50 41.50 85.50 357.00 1035.50 1536.50 8002.50
1898 1401.00 1256.50 932.50 614.00 240.50 28.50 8.50 28.00 136.50 621.00 1061.00 1608.50 7936.50
1899 1577.00 1629.00 1443.00 556.00 252.00 37.50 14.00 11.50 282.00 392.50 744.00 1464.50 8403.00
1900 1382.50 1563.00 1294.00 466.50 186.00 45.00 13.00 0.00 z 188.50 294.50 1091.00 1299.50 7823.50
1901 1479.00 1509.50 1123.00 506.00 232.00 60.50 0.50 11.50 239.48 a 447.00 1023.00 1522.50 8153.98
1902 1459.50 1413.50 913.50 605.00 198.50 115.00 12.50 46.50 270.50 490.00 787.50 1520.55 a 7832.55
1903 1523.00 1372.00 923.00 582.00 213.00 116.00 19.50 85.50 257.00 506.50 1052.00 1655.50 8305.00
1904 1745.19 d 1600.00 1038.00 639.50 174.00 23.50 10.50 76.00 193.50 500.50 837.50 1435.00 8273.19
1905 1822.50 1546.00 915.00 632.50 342.50 58.50 21.50 11.50 135.00 a 602.50 926.00 1291.50 8305.00
1906 1397.50 1335.00 1268.00 440.00 277.00 59.50 16.00 8.00 96.50 522.35 a 933.50 1316.00 7669.35
1907 1589.50 1268.50 951.00 800.50 464.50 83.50 4.00 48.50 230.50 569.50 929.50 1227.50 8167.00
1908 1329.00 1285.50 1013.00 596.00 281.00 99.50 21.00 59.00 108.00 503.50 829.00 1309.00 7433.50
1909 1443.00 0.00 z 0.00 z 796.55 a 310.53 b 65.00 13.50 12.50 219.00 436.00 g 786.50 1584.62 a 5231.20
1910 1559.30 a 1460.85 b 754.73 e 260.50 i 354.50 94.50 0.00 21.18 a 191.25 b 419.00 1098.62 a 1444.50 7398.43
1911 1571.00 1136.00 968.50 638.50 161.50 5.89 b 18.50 53.50 188.50 586.00 1202.50 1217.00 7747.39
1912 2070.00 1461.50 1379.50 e 494.50 207.00 86.00 31.00 a 47.03 b 214.00 463.28 d 846.00 1257.00 8556.81
1913 1473.00 1419.00 1164.05 a 531.50 288.00 55.50 2.00 g 10.00 231.00 560.00 754.50 1068.00 7554.55
1914 1292.00 1507.50 1071.50 603.50 253.34 b 45.50 1.50 33.00 168.46 d 351.50 870.00 1566.00 7763.81
1915 1579.50 1112.00 1167.00 346.00 375.88 c 49.00 l 27.50 83.91 b 165.00 f 451.00 857.50 1350.50 7350.79
1916 1525.20 a 1440.00 1127.00 605.17 a 287.55 b 128.00 0.00 27.50 242.00 565.50 969.00 1604.00 8520.92
1917 1400.50 f 1643.19 a 1158.00 662.00 390.00 160.00 27.50 60.50 216.00 822.53 a 854.00 1669.50 7663.22
1918 1881.50 1349.00 865.00 695.50 216.50 40.50 44.84 c 23.00 304.04 d 397.00 798.00 1106.00 7720.88
1919 1300.97 a 1211.00 979.00 595.50 310.00 34.50 0.00 17.64 b 79.50 k 361.00 f 0.00 z 0.00 z 4448.60
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1956 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1957 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1958 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1528.50 1528.50
1959 1680.50 1403.00 1107.39 d 560.50 165.00 36.00 18.27 c 2.50 168.21 b 619.00 1202.00 1082.00 8044.37
1960 1401.00 1293.00 1366.50 573.50 292.00 82.50 27.50 8.50 208.50 520.28 a 859.00 1437.00 8069.28
1961 1556.00 1096.00 1037.00 800.00 363.00 77.50 19.50 27.00 266.50 484.50 978.00 1497.30 a 8202.30
1962 1717.00 1414.50 1195.00 697.24 a 211.50 88.97 a 47.00 47.50 330.00 523.79 b 920.50 1432.50 8625.50
1963 1885.00 1463.00 1016.50 584.00 380.50 70.50 13.50 101.50 229.50 286.50 825.00 1747.50 8603.00
1964 1363.50 1221.50 1177.00 618.50 205.00 87.50 21.00 115.14 c 269.50 645.00 918.75 b 1562.00 8204.39
1965 1698.50 1462.00 1407.50 760.50 223.50 89.50 33.00 73.37 a 367.50 528.50 975.50 1161.47 a 8780.83
1966 1846.57 a 1403.77 b 969.00 748.97 a 454.15 a 112.00 8.50 61.00 239.40 e 531.50 947.50 1395.50 8717.85
1967 1487.00 1501.00 1053.00 591.00 415.50 47.00 45.00 57.50 203.50 561.00 1022.50 1272.50 8256.50
1968 1476.50 1370.50 772.00 479.50 305.00 55.00 13.00 34.50 166.50 463.00 931.50 1403.50 7470.50
1969 1668.32 a 1222.00 1242.00 505.00 210.00 164.50 7.00 0.50 155.00 584.50 955.50 1354.50 8068.82
1970 1782.50 1291.00 1107.00 557.00 226.00 43.50 12.50 5.00 201.00 468.00 949.00 1403.50 8046.00
1971 1752.50 1332.50 1171.50 548.79 a 338.00 24.00 30.50 37.00 145.50 307.50 900.50 1323.00 7911.29
1972 1709.00 1452.00 1155.00 703.50 198.00 73.00 30.00 39.50 161.00 599.50 967.50 1544.50 8632.50
1973 1414.50 1145.00 743.50 633.50 319.50 16.00 0.50 14.50 168.00 324.50 886.00 1446.50 7112.00
1974 1523.00 1284.00 1049.00 512.00 348.50 83.00 1.50 38.00 281.00 491.87 a 893.00 1273.00 7777.87
1975 1510.50 1309.00 1276.50 767.50 211.00 82.00 32.00 17.00 289.00 450.02 a 808.00 1339.00 8091.52
1976 1614.00 1082.50 963.50 463.50 288.00 16.00 3.50 28.50 195.00 663.00 1138.00 1662.00 8117.50
1977 1976.00 1226.50 812.50 371.50 88.00 64.50 4.00 0.00 z 149.50 563.00 1004.00 1516.00 7775.50
1978 1829.50 1513.00 1126.00 604.50 301.96 d 47.50 h 11.37 a 36.50 g 83.50 l 652.19 e 878.50 f 1581.50 7620.02
1979 1981.50 1051.50 i 1136.84 b 551.50 i 0.00 z 25.00 m 8.00 n 25.00 j 149.50 441.00 h 783.50 h 1242.07 a 4509.91
1980 1464.46 d 1021.50 g 597.00 n 526.00 92.50 m 42.00 i 1.50 o 1.00 p 131.50 g 173.50 t 843.60 e 921.00 j 2834.06
1981 1376.52 e 1198.50 734.50 g 451.67 c 300.91 b 32.50 16.00 f 29.89 c 177.00 554.50 833.00 1434.50 6388.99
1982 1827.00 1293.50 1087.50 680.50 129.00 141.00 3.50 y 0.00 z 186.50 o 500.50 987.50 1219.00 7865.50
1983 1395.50 1088.00 987.50 735.00 391.50 71.50 7.50 0.00 203.00 534.50 888.00 1841.50 8143.50
1984 1590.00 1075.50 1228.50 580.50 368.50 12.50 20.00 18.00 239.50 447.50 977.00 1391.00 7948.50
1985 1706.50 1421.50 912.50 474.50 143.50 112.00 6.50 49.50 237.50 551.50 1181.50 1775.50 8572.50
1986 1524.50 1351.00 979.50 463.00 220.00 42.50 21.50 63.50 176.50 524.00 1131.50 1309.50 7807.00
1987 1420.00 1001.50 880.50 463.00 184.50 35.00 7.00 56.00 157.00 677.00 817.00 1239.50 6938.00
1988 1728.50 1493.00 1006.50 594.50 137.00 20.50 3.00 30.50 144.00 705.50 948.50 1416.00 8227.50
1989 1311.00 1510.00 1153.00 0.00 z 304.50 91.50 3.00 18.50 219.00 473.50 1106.00 1712.00 7902.00
1990 1219.00 1207.50 928.00 619.00 365.50 57.00 11.50 16.00 166.00 587.00 800.50 1491.00 7468.00
1991 1707.50 1196.00 992.00 523.50 235.00 12.50 17.00 18.50 277.00 567.00 1198.50 1356.50 8101.00
1992 1372.00 1102.00 1026.50 706.00 244.00 91.00 64.50 93.00 247.50 555.50 1032.50 1369.50 7904.00
1993 1586.00 1363.50 1163.00 723.00 276.00 98.50 5.50 24.50 343.50 586.50 1021.50 1344.00 8535.50
1994 1851.50 1489.50 1013.50 602.00 268.50 45.00 29.00 81.50 0.00 z 408.68 a 821.00 1243.00 7853.18
1995 1499.88 a 1274.50 976.50 740.50 295.02 a 41.50 20.00 0.00 242.00 532.00 1170.50 1452.00 8244.40
1996 1649.50 1392.50 1252.50 728.50 384.00 84.00 11.00 13.50 221.00 502.00 1177.50 1500.50 8916.50
1997 1689.00 1210.00 1075.00 675.00 378.00 i 21.50 37.00 44.50 149.50 526.00 1054.00 1268.50 7750.00
1998 0.00 z 0.00 z 0.00 z 59.00 z 17.50 v 0.00 z 2.50 j 4.50 m 80.00 463.00 830.50 1189.50 2563.00
1999 0.00 z 0.00 z 186.50 w 519.31 a 212.00 79.50 2.00 25.50 232.00 555.00 722.50 1290.50 3638.31
2000 1487.00 1103.00 795.50 593.50 242.00 87.00 28.50 14.00 210.50 412.00 1017.00 1789.00 7779.00
2001 1448.50 1445.00 1187.50 515.50 239.50 108.00 h 18.17 b 17.50 262.22 c 592.21 b 578.50 1121.68 a 7426.29
2002 340.50 x 650.50 j 1252.50 640.50 385.50 48.50 3.00 23.50 151.00 680.50 995.50 1264.50 5445.00
2003 1594.00 1416.50 1071.00 612.50 290.00 86.50 8.50 3.00 213.00 528.50 980.00 1240.50 8044.00
2004 1625.50 1305.00 915.50 550.50 312.00 91.50 15.50 104.50 96.50 511.50 832.00 1350.00 7710.00
2005 1565.00 1083.50 1113.00 463.50 362.50 7.00 15.50 29.50 107.50 481.50 891.00 1512.50 7632.00
2006 1129.50 1286.00 1017.50 453.00 293.50 40.00 1.50 3.00 259.00 663.50 847.50 1149.00 7143.00
2007 1404.50 1539.50 936.00 644.00 161.00 27.00 2.00 15.00 147.00 377.00 962.50 1491.00 7706.50
2008 1638.50 1532.50 1189.00 665.00 329.00 28.50 2.00 20.50 132.50 534.00 917.00 1635.00 8623.50
2009 1832.00 1226.00 1023.00 611.00 283.00 90.50 42.00 48.00 122.00 703.50 717.00 1445.00 8143.00
2010 1629.00 1307.50 838.00 401.00 263.00 23.50 2.00 8.50 204.00 413.00 896.50 1548.50 7534.50
2011 1646.50 1296.00 1120.00 661.50 310.00 56.00 0.00 3.00 259.50 437.50 831.50 1229.50 7851.00
2012 1374.00 1110.00 558.50 545.00 147.25 a 39.31 a 0.00 40.00 215.50 591.00 876.21 a 1263.00 6759.77
2013 1447.38 b 1330.50 917.00 h 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2777.88
Period of Record Statistics
MEAN 1576.50 1336.14 1061.11 588.58 271.06 63.27 15.27 34.27 202.77 521.61 940.47 1405.31 8025.35
S.D. 186.88 152.89 164.41 105.03 80.66 36.03 13.54 27.34 61.21 102.10 129.21 174.69 451.25
SKEW 0.31 -0.11 -0.19 0.04 0.06 0.60 1.14 1.05 0.23 0.02 0.14 0.31 -0.49
MAX 2070.00 1643.19 1443.00 800.50 464.50 164.50 64.50 115.14 367.50 822.53 1202.50 1841.50 8916.50
MIN 1129.50 1001.50 558.50 346.00 88.00 5.89 0.00 0.00 80.00 286.50 578.50 1068.00 6759.77
NO YRS 77 76 76 77 77 74 74 73 75 77 77 80 59