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
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 14.50 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 2074.50 1701.00 985.00 625.50 429.00 108.50 13.00 13.50 349.00 541.50 1183.00 1558.00 9581.50
1930 1929.50 1079.50 1068.50 527.50 355.50 67.00 11.00 13.00 235.86 a 643.50 997.50 1298.00 8226.36
1931 1264.50 1032.37 a 1121.50 585.00 391.50 39.50 10.00 47.50 121.00 481.50 996.00 1430.50 7520.87
1932 1708.00 1416.50 1337.00 562.50 259.00 3.00 24.00 18.00 206.00 705.50 1107.00 1598.50 8945.00
1933 1550.50 1503.00 1052.00 661.00 282.50 16.00 4.50 19.50 86.50 627.50 1041.50 1651.00 8495.50
1934 1438.00 1245.00 1142.50 586.00 120.50 31.50 5.50 57.50 308.00 421.50 898.00 1630.00 7884.00
1935 1830.50 1055.00 1049.00 748.50 424.00 118.00 0.00 72.00 174.50 618.50 1354.82 b 1609.50 9054.32
1936 2186.00 2160.50 1099.50 799.00 157.50 40.50 0.00 9.00 139.50 647.00 1132.00 1495.00 9865.50
1937 2232.00 1641.50 1266.50 793.50 242.00 109.00 3.00 7.00 243.10 a 657.64 c 1201.07 b 1667.00 10063.32
1938 1735.50 0.00 z 0.00 z 599.48 a 332.73 a 81.50 4.13 a 8.00 164.00 401.50 1162.00 1384.00 5872.85
1939 1547.50 1776.00 1161.00 724.50 166.37 a 108.00 3.50 63.00 274.50 655.28 b 917.50 1168.50 8565.64
1940 1895.50 1399.50 1235.00 770.00 348.75 a 98.50 9.00 64.00 145.34 a 371.48 a 1198.50 1348.00 8883.58
1941 1642.00 1498.50 1232.25 a 575.00 217.00 127.00 36.50 34.10 a 285.50 591.00 997.00 1278.00 8513.85
1942 1406.50 1355.00 1015.50 602.50 481.00 145.50 39.50 42.50 396.00 608.00 1023.50 1643.00 8758.50
1943 2027.00 1416.00 1446.00 620.00 0.00 z 137.00 9.50 44.00 325.00 532.00 1129.00 1404.50 9090.00
1944 1401.00 1601.73 a 1435.50 783.00 250.00 108.50 36.50 84.00 254.50 502.00 973.00 1425.00 8854.73
1945 1575.00 1419.50 903.50 773.50 504.50 221.50 46.00 22.50 343.50 553.50 1180.00 1796.00 9339.00
1946 1717.00 1591.50 884.00 472.50 414.50 91.50 4.00 40.50 241.50 681.00 1122.50 1556.00 8816.50
1947 1468.50 1514.00 1248.00 756.00 430.50 119.50 12.00 16.50 257.50 349.50 1241.50 1638.50 9052.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4.65 a 16.00 90.50 557.00 1010.50 1577.00 3255.65
1949 1861.50 1734.50 1258.00 568.50 263.50 a 53.50 13.50 8.50 278.50 606.05 a 849.50 1666.00 9161.55
1950 2211.50 1590.50 1341.00 928.00 444.50 87.00 23.50 65.00 194.00 532.50 1246.00 1716.50 10380.00
1951 1908.50 1459.00 1550.00 764.00 238.50 209.00 37.50 66.50 360.00 674.77 a 1288.50 1788.70 a 10344.97
1952 1961.50 1395.50 1427.50 582.50 306.50 67.50 27.00 39.00 196.50 732.50 1032.50 1499.50 9268.00
1953 1693.50 1357.00 1175.00 820.00 387.00 101.90 a 21.00 15.50 234.00 406.50 916.50 1507.50 8635.40
1954 2041.00 981.50 1269.00 715.00 461.50 100.00 33.00 18.50 233.00 652.50 906.50 1408.50 8820.00
1955 1667.50 1638.50 1387.50 449.50 190.50 99.00 3.50 9.50 240.00 554.50 1395.50 1866.50 9502.00
1956 1771.00 1731.50 1376.50 881.90 a 340.50 27.50 23.50 39.00 287.00 474.50 1088.50 1406.00 9447.40
1957 1938.50 1456.00 1156.30 a 692.00 350.50 113.50 2.50 51.00 313.00 594.50 1078.45 a 1327.50 9073.75
1958 1514.00 1499.50 1109.50 650.00 271.00 200.69 a 58.00 49.00 204.50 543.02 a 1035.50 1639.50 8774.21
1959 1861.50 1651.00 1021.00 680.00 357.50 55.50 21.00 23.50 240.50 797.50 1275.50 1189.50 9174.00
1960 1677.50 1535.00 1493.00 657.00 287.50 82.50 15.50 15.00 208.50 520.00 1022.50 1676.50 9190.50
1961 1752.50 1377.50 977.50 836.00 443.50 65.00 20.00 10.50 337.00 564.00 1069.50 1757.50 9210.50
1962 1823.50 1548.50 1366.00 722.50 286.50 95.00 24.50 18.50 295.86 a 487.00 932.07 a 1446.00 9045.93
1963 1943.00 1491.00 1048.50 631.00 351.50 50.00 4.50 31.50 131.00 282.00 927.50 1787.50 8679.00
1964 1567.00 1308.50 1396.00 629.50 271.50 109.50 2.50 90.00 307.50 593.50 1124.50 1877.00 9277.00
1965 1984.50 1629.50 1506.00 717.00 325.00 72.50 7.50 46.50 509.00 504.00 1117.50 1331.50 9750.50
1966 2122.00 1604.50 1055.00 815.00 415.00 101.50 0.00 75.00 225.50 622.50 1253.50 1557.00 9846.50
1967 1705.00 1651.50 1124.00 789.50 467.00 114.50 53.00 62.00 202.00 657.00 1081.00 1519.50 9426.00
1968 1805.00 1577.50 981.50 704.00 446.00 91.00 42.00 87.50 241.50 594.50 1025.00 1690.50 9286.00
1969 2026.00 1438.00 1540.50 610.50 317.00 223.00 28.50 11.50 165.50 739.00 1022.50 1452.50 9574.50
1970 1980.50 1470.50 1412.00 760.00 366.00 51.00 13.50 22.50 260.50 600.00 1155.00 1681.00 9772.50
1971 1932.00 1493.50 1163.00 599.00 394.00 52.00 53.50 26.50 247.50 554.00 1102.00 1696.50 9313.50
1972 1960.00 1735.00 1263.50 745.50 271.00 87.00 28.50 55.50 265.50 729.50 1125.50 1809.50 10076.00
1973 1616.50 1316.00 890.50 676.00 312.00 57.50 11.00 9.50 290.50 449.50 1168.50 1653.50 8451.00
1974 1901.50 1482.00 1244.00 689.00 414.50 104.00 1.50 67.50 270.54 b 556.50 1036.50 981.00 i 7767.54
1975 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1976 0.00 z 0.00 z 0.00 z 0.00 z 279.52 a 55.00 11.76 b 18.60 a 253.85 d 773.00 1216.50 1679.50 4287.72
1977 2064.00 1261.00 1031.78 a 426.21 a 87.83 a 20.69 a 7.50 56.50 243.00 498.50 f 1165.50 1759.77 a 8123.78
1978 2143.28 b 1615.50 1010.50 g 692.50 221.50 80.00 c 11.00 30.00 178.50 577.50 1266.50 1693.63 a 8509.91
1979 2107.00 1824.00 1338.00 844.50 470.50 70.00 8.50 f 47.50 149.00 641.00 1132.50 1302.00 9926.00
1980 1706.55 a 1518.00 1281.85 a 500.00 202.50 48.00 8.00 h 33.50 231.00 618.50 887.50 1487.00 8514.40
1981 1522.10 a 1234.00 946.53 a 498.50 293.50 56.90 a 9.00 7.00 194.00 618.00 862.50 1657.50 7899.53
1982 2203.00 1574.50 1213.00 725.50 253.00 140.50 0.00 52.50 231.00 613.50 1207.50 1340.50 9554.50
1983 1440.00 1194.00 1079.00 295.00 s 372.00 90.00 11.00 0.00 252.00 672.50 1050.50 0.00 z 6161.00
1984 1726.50 1179.50 1315.50 620.00 364.50 72.00 8.50 13.50 351.00 573.50 1086.00 1693.50 9004.00
1985 1899.02 b 1536.50 965.50 511.50 165.00 152.00 0.00 83.00 302.50 643.50 1486.55 a 1821.00 9566.07
1986 1563.12 e 1554.00 998.50 661.00 262.50 41.50 6.50 70.00 270.52 a 576.00 1251.50 1357.00 8612.13
1987 1414.00 1042.50 1077.50 423.00 159.50 39.50 14.00 77.00 172.50 712.50 957.50 1308.00 7397.50
1988 1774.50 1596.04 a 1088.10 a 621.00 123.50 8.00 0.00 a 33.00 257.07 a 719.50 1143.00 1468.00 8831.71
1989 1711.50 1752.59 a 1428.50 687.00 248.00 a 94.50 0.00 14.00 226.00 572.50 1179.50 1839.50 9753.59
1990 1339.00 1344.50 1018.50 655.00 356.00 67.50 13.50 29.00 154.00 683.00 973.50 1725.50 8359.00
1991 1794.00 1175.00 1073.00 560.00 251.50 22.00 20.00 0.00 251.00 709.50 1292.00 1431.50 8579.50
1992 1463.00 1187.50 984.50 752.50 266.50 113.00 83.00 109.00 306.50 623.00 1165.50 1673.50 8727.50
1993 1910.50 1593.50 1241.00 693.00 321.00 172.50 53.50 39.00 382.50 695.00 1202.00 1592.50 9896.00
1994 2151.50 1766.00 1156.00 682.00 203.00 32.50 25.50 64.00 168.50 537.50 1003.50 1518.00 9308.00
1995 1708.00 1407.50 1257.50 815.00 373.50 56.00 15.50 3.00 281.50 660.50 1260.00 1597.00 9435.00
1996 2025.00 1506.00 1448.00 820.50 372.00 62.50 20.00 12.50 240.50 658.50 1487.00 1873.00 10525.50
1997 1976.00 1451.00 1355.00 834.00 374.50 7.00 13.00 54.00 130.50 577.00 1257.50 1291.00 9320.50
1998 1711.00 1063.00 1296.00 524.50 159.00 130.00 3.50 0.00 107.50 571.50 1018.50 1372.50 7957.00
1999 1858.00 1177.50 1001.00 635.00 258.00 77.50 7.50 16.50 268.50 660.00 842.00 0.00 z 6801.50
2000 1649.50 1190.00 912.50 681.50 242.50 94.50 26.50 17.50 245.00 525.50 1245.00 1906.50 8736.50
2001 1571.50 1696.50 1305.50 696.50 250.07 a 91.00 9.50 20.00 218.50 672.50 261.00 r 0.00 z 6531.57
2002 0.00 z 0.00 z 0.00 z 674.50 438.00 37.50 5.00 j 30.50 212.00 869.50 226.50 w 0.00 z 2262.00
2003 0.00 z 0.00 z 0.00 z 0.00 z 343.50 77.50 5.50 14.50 w 269.00 520.50 761.00 j 0.00 z 1216.00
2004 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 129.50 h 46.50 75.50 j 164.50 261.00 r 0.00 z 0.00 z 211.00
2005 0.00 z 0.00 z 0.00 z 526.00 395.50 56.00 21.00 34.50 160.50 587.50 0.00 z 0.00 z 1781.00
2006 0.00 z 0.00 z 0.00 z 505.00 316.50 52.00 i 6.50 13.50 302.50 734.50 1083.50 1320.00 4282.00
2007 1743.00 1679.50 235.50 t 773.00 224.50 40.50 10.00 64.00 242.00 510.50 1050.50 0.00 z 6337.50
2008 0.00 z 0.00 z 0.00 z 0.00 z 389.50 120.00 7.50 22.00 243.50 631.50 427.50 p 0.00 z 1414.00
2009 0.00 z 0.00 z 0.00 z 703.93 b 216.50 h 160.80 e 10.50 k 43.00 k 58.00 t 749.96 e 671.00 g 1735.45 c 3350.14
2010 1186.50 j 1198.50 g 1020.50 460.80 e 342.00 42.50 g 2.50 8.00 g 306.50 516.50 1088.50 1163.00 j 3737.30
2011 1851.96 d 1131.50 h 829.00 m 527.50 h 385.84 c 64.50 g 0.00 e 1.50 g 184.00 f 503.23 a 1028.89 c 1308.09 c 5078.01
2012 1433.75 e 972.00 g 776.60 b 425.50 h 238.38 b 60.58 d 1.00 24.00 k 255.56 c 552.50 f 356.50 s 773.50 q 2765.87
2013 1673.45 c 1533.91 e 1492.59 d 46.50 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 4699.95
Period of Record Statistics
MEAN 1783.64 1467.78 1187.56 667.75 313.81 85.77 16.67 36.00 242.01 595.96 1107.10 1561.40 9089.41
S.D. 234.92 220.81 185.21 113.75 95.32 47.67 16.63 25.68 72.85 103.41 139.23 184.88 663.78
SKEW -0.06 -0.08 0.09 -0.16 -0.17 0.83 1.52 0.65 0.43 -0.35 0.38 -0.12 -0.24
MAX 2232.00 2160.50 1550.00 928.00 504.50 223.00 83.00 109.00 509.00 869.50 1487.00 1906.50 10525.50
MIN 1264.50 981.50 776.60 423.00 87.83 3.00 0.00 0.00 86.50 282.00 842.00 1168.50 7397.50
NO YRS 74 71 71 75 79 78 79 77 81 80 75 71 60