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 0.00 z 653.50 r 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1894 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1895 1749.00 1520.81 a 1286.00 592.50 0.00 z 0.00 z 0.00 z 85.00 219.50 818.00 0.00 z 0.00 z 6270.81
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 1478.00 1359.50 1204.87 a 650.00 348.00 133.50 49.50 65.62 a 137.00 511.00 976.07 b 1484.50 8397.55
1909 1540.00 1329.00 1240.00 933.50 415.40 a 92.50 26.35 a 39.50 256.73 d 677.72 b 840.50 1494.72 a 8885.92
1910 1597.02 a 1500.50 796.04 c 487.78 c 476.48 d 150.00 e 18.00 47.61 c 269.00 499.10 a 1179.50 1512.59 b 8533.60
1911 1165.50 i 1249.50 1076.39 d 690.50 256.04 d 30.50 63.07 b 91.93 b 260.50 664.43 a 1218.00 1243.50 6844.36
1912 2180.50 1554.00 1401.00 687.41 a 317.50 141.00 54.00 129.50 288.33 c 519.52 b 963.62 a 1344.00 9580.39
1913 1578.50 1586.50 1342.50 638.28 a 418.00 113.00 68.00 45.50 297.00 584.98 d 845.56 c 1134.00 8651.81
1914 1406.50 1630.00 1269.97 a 782.07 a 279.52 a 141.50 13.50 84.50 234.00 409.00 1000.00 1638.00 8888.55
1915 1630.00 1135.50 1243.00 427.50 475.00 219.00 88.50 179.00 249.00 560.50 976.00 1411.00 8594.00
1916 1640.00 1569.50 1328.87 a 793.33 c 442.27 a 201.50 2.50 80.00 313.97 a 670.67 e 1107.00 1680.00 9829.61
1917 1854.83 a 1771.00 b 1329.68 c 841.00 523.50 235.71 b 78.50 161.50 279.00 923.50 961.50 1770.50 10730.23
1918 1989.00 1533.00 1064.16 b 805.00 360.50 168.62 a 73.50 50.63 a 495.54 b 637.50 958.00 1273.00 9408.45
1919 1416.38 b 1406.00 1233.80 a 758.50 433.50 38.00 35.00 110.50 256.50 752.00 1168.00 1885.12 b 9493.30
1920 1951.97 a 1556.00 1242.50 926.90 a 394.50 131.50 83.50 106.50 217.50 390.00 1113.50 1395.50 9509.86
1921 1489.50 1305.50 1185.50 576.50 321.50 88.50 7.50 58.50 166.50 597.50 1222.50 1515.50 8535.00
1922 1781.50 1567.50 1226.50 764.50 171.50 107.00 63.50 92.00 236.00 616.00 911.50 1663.50 9201.00
1923 1640.50 1727.50 1572.00 908.50 379.50 80.50 19.50 154.00 226.50 695.00 1177.00 0.00 z 8580.50
1924 1985.50 1443.56 b 1283.00 853.00 641.50 210.00 107.50 144.00 350.50 433.50 1054.50 1853.28 a 10359.84
1925 1678.65 a 1375.50 1205.00 569.00 527.50 122.50 69.50 56.00 221.00 936.50 1152.00 1578.86 b 9492.01
1926 1699.00 1400.50 1440.00 909.31 a 355.50 221.00 57.50 73.00 383.50 731.50 1219.44 c 1643.52 a 10133.77
1927 1808.50 1325.85 a 1052.45 a 767.00 505.82 a 222.00 77.50 a 173.00 256.50 574.02 a 1124.50 1759.52 b 9646.65
1928 1645.00 1477.45 a 1299.00 952.50 342.00 236.50 32.50 84.50 384.31 a 616.90 a 985.50 1365.11 c 9421.26
1929 2078.00 1656.50 1153.64 c 684.50 505.82 a 176.25 b 33.58 a 80.94 d 293.65 d 672.50 1195.00 1519.50 10049.89
1930 1898.75 a 1265.50 1214.68 a 520.00 g 254.20 a 0.00 z 46.50 a 72.50 319.00 618.89 c 867.22 c 1367.50 7924.75
1931 1405.33 a 1159.93 a 1162.50 a 601.00 449.50 101.50 34.00 79.50 h 185.56 c 375.50 g 827.31 d 1221.00 7147.62
1932 1056.00 g 1423.79 c 1460.74 b 792.32 b 394.73 a 38.00 50.50 68.41 b 278.79 a 724.00 1201.50 1592.22 b 8025.02
1933 1492.98 c 1690.64 c 1292.50 819.31 a 327.00 41.50 16.00 78.00 159.00 721.50 1165.00 1671.42 a 9474.85
1934 1013.00 h 1607.93 a 1340.00 792.50 219.00 77.50 26.50 153.00 289.14 a 520.50 912.50 1510.14 c 7448.71
1935 1765.00 1316.00 1046.00 711.50 442.00 193.00 4.00 76.00 296.00 568.50 1099.00 1502.50 9019.50
1936 1788.00 1909.00 1191.00 939.00 257.00 157.50 8.00 71.30 a 179.00 753.50 1165.50 1412.64 b 9831.44
1937 1817.00 1439.41 a 1366.50 823.50 344.50 119.00 22.22 a 26.00 292.00 750.50 1092.00 1600.63 a 9693.26
1938 1731.19 b 1309.50 1043.31 b 697.50 371.50 152.00 19.00 44.00 289.00 488.50 1005.54 b 1493.00 8644.04
1939 1515.38 a 1580.50 1297.50 876.50 286.50 131.50 28.50 52.50 271.00 603.50 927.93 a 1202.28 a 8773.60
1940 1760.00 1332.50 1442.50 857.07 a 470.50 138.10 a 47.00 122.00 222.00 546.00 1126.00 1412.00 9475.67
1941 1566.00 1385.48 a 1336.00 531.50 269.00 110.50 68.20 a 102.50 230.69 a 603.00 952.50 1246.00 8401.37
1942 1551.55 a 1423.50 1112.00 546.50 421.08 a 140.50 74.00 84.00 353.00 560.50 1055.50 1565.50 b 8887.63
1943 1771.00 1414.52 a 1450.50 858.62 a 400.50 110.69 a 11.50 34.50 s 374.46 b 579.50 1139.48 a 1337.59 d 9448.37
1944 1230.24 d 1336.15 b 1292.04 c 786.67 c 193.20 c 104.50 34.00 i 72.85 a 239.48 a 580.00 849.00 1511.00 8195.12
1945 1736.00 1379.50 876.27 a 678.00 493.00 208.00 81.50 47.50 306.50 630.00 1047.50 1582.00 9065.77
1946 1549.00 1428.00 825.00 615.00 410.50 157.00 36.50 111.50 257.50 499.62 a 989.00 1436.50 8315.12
1947 1492.00 1446.50 1306.00 809.00 496.00 171.50 52.00 30.50 250.00 268.00 1136.00 1447.18 a 8904.68
1948 1813.50 1503.00 1269.50 556.00 377.50 114.00 43.00 41.85 a 165.00 584.50 961.00 1450.50 8879.35
1949 1511.50 1429.50 1228.00 649.00 326.00 54.50 18.00 49.50 313.00 488.50 1022.00 1460.00 8549.50
1950 1759.50 1447.00 1426.50 1035.50 434.00 138.50 83.50 165.00 254.50 473.00 1185.50 1658.00 10060.50
1951 1736.50 1443.00 1341.50 758.50 262.50 174.50 69.75 e 157.50 351.21 a 674.00 1221.43 b 1574.28 a 9764.67
1952 845.00 n 1265.64 a 1256.00 618.00 391.50 90.56 c 39.00 94.50 273.00 785.50 964.29 b 1296.00 7073.98
1953 1486.50 1378.50 1140.00 810.54 b 323.50 79.50 64.50 51.00 289.14 a 446.50 880.34 a 1381.00 8331.02
1954 1686.50 1148.50 1320.50 714.50 565.00 104.50 39.00 95.50 324.31 a 634.50 921.50 1397.50 8951.81
1955 1666.00 1404.00 1294.50 469.00 208.50 82.50 1.00 26.50 229.00 514.50 1166.50 1593.00 8655.00
1956 1542.00 1450.50 1283.00 768.00 343.50 66.00 61.00 54.00 309.50 372.00 1000.00 1369.00 8618.50
1957 1798.50 1334.00 1183.00 638.50 327.50 92.00 10.00 59.93 a 280.86 a 578.00 1032.50 1391.50 8726.29
1958 1431.00 1452.50 1152.00 619.50 327.50 190.50 34.00 71.50 191.00 503.50 954.50 1689.00 8616.50
1959 1823.00 1465.50 1184.00 672.00 218.55 a 66.00 40.50 13.00 199.00 692.50 1264.50 1207.00 8845.55
1960 1532.50 1381.00 1429.50 653.50 348.00 107.50 46.50 24.50 247.00 559.00 919.50 1517.00 8765.50
1961 1629.50 1195.00 1062.00 770.50 415.00 77.00 21.50 20.00 243.50 490.00 1019.50 1498.00 8441.50
1962 1733.00 1479.50 1132.50 724.00 241.00 99.00 29.50 49.00 311.50 505.00 954.50 1500.50 8759.00
1963 1911.50 1596.50 1105.00 604.00 378.00 94.00 21.50 80.50 180.50 265.50 828.00 1652.50 8717.50
1964 1414.50 1359.00 1241.00 639.00 192.50 112.50 16.50 130.00 263.00 608.00 891.50 1588.50 8456.00
1965 1692.00 1488.50 1399.00 774.50 207.00 92.00 45.50 88.00 374.50 540.50 1006.50 1254.50 8962.50
1966 1821.50 1337.50 1059.00 788.50 462.50 73.50 8.00 110.00 249.50 592.50 1029.50 1444.00 8976.00
1967 1494.50 1548.50 1155.50 673.00 491.00 46.50 64.50 106.00 240.00 599.00 1113.50 1417.00 8949.00
1968 1624.50 1513.00 924.50 568.00 379.50 138.50 50.00 89.00 198.00 490.50 982.00 1462.50 8420.00
1969 1599.50 1325.00 1301.50 593.00 291.00 254.00 41.00 10.00 230.50 708.50 1069.50 1470.50 8894.00
1970 1867.50 1509.50 1318.50 720.00 423.50 105.00 52.50 57.00 269.00 545.00 1062.50 1508.00 9438.00
1971 1872.50 1466.00 1323.50 751.00 480.00 94.50 87.00 116.50 267.50 401.50 996.50 1453.00 9309.50
1972 1916.50 1630.50 1330.00 871.00 260.50 144.50 76.00 85.00 299.00 746.00 1076.00 1650.50 10085.50
1973 1569.50 1369.50 929.50 772.50 519.00 76.00 26.50 66.50 325.00 451.00 1036.50 1527.50 8669.00
1974 1700.50 1561.50 1248.50 748.00 513.00 208.50 29.00 89.00 473.00 694.00 965.00 1344.00 9574.00
1975 1609.50 1416.00 1382.50 916.00 288.50 137.50 46.00 65.00 379.50 503.00 861.50 1510.50 9115.50
1976 1744.50 1233.00 1247.00 622.50 405.00 54.00 11.00 89.50 320.50 773.00 1253.00 1804.20 a 9557.20
1977 1963.00 1327.00 978.50 567.50 138.00 133.00 28.00 166.00 270.00 628.50 1036.00 1559.00 8794.50
1978 1717.00 1553.50 1276.50 816.00 314.81 b 154.50 79.00 56.50 228.21 b 628.50 1078.00 1627.00 9529.53
1979 1914.00 1574.00 1177.00 837.50 486.00 75.00 p 33.50 95.50 229.00 714.50 1084.50 1333.50 9479.00
1980 1658.00 1532.50 1298.38 a 645.00 271.00 155.50 0.00 z 64.00 319.50 781.50 1010.50 1604.25 a 9340.13
1981 1671.50 1297.00 1090.00 668.50 404.55 a 101.00 68.50 36.68 a 342.00 753.00 919.00 1523.50 8875.23
1982 1968.00 1470.00 1258.00 852.00 208.50 235.00 10.50 138.00 316.00 575.00 1067.00 1314.00 9412.00
1983 1505.50 1135.50 1100.50 817.00 517.50 125.00 26.00 17.50 259.00 646.50 1026.00 1916.00 9092.00
1984 1800.50 1185.00 1392.50 626.50 455.70 a 0.00 z 29.50 34.50 347.50 512.69 e 1091.50 1532.84 c 9008.73
1985 1786.00 1494.50 1076.65 e 606.50 268.09 d 180.50 37.50 98.00 362.50 670.00 1257.78 c 1887.90 a 9725.92
1986 1692.00 1484.50 1135.00 565.86 a 261.50 143.00 22.00 123.00 318.50 685.50 1198.00 1461.00 9089.86
1987 1499.50 1183.50 1000.00 521.50 274.50 83.00 28.50 79.50 233.50 813.00 955.86 a 1310.00 7982.36
1988 1854.83 a 1614.50 1145.97 a 680.50 237.50 85.50 13.50 58.50 240.00 793.00 992.50 1501.50 9217.80
1989 1430.00 1606.50 1355.50 780.50 0.00 z 158.00 19.00 48.50 262.00 567.00 1178.00 1847.50 9252.50
1990 1339.50 1342.50 1114.00 617.00 432.00 125.50 51.00 58.00 227.00 666.50 903.50 1508.50 8385.00
1991 1736.00 1256.50 1113.50 598.00 251.50 36.00 54.50 49.50 325.00 682.00 1182.00 1434.50 8719.00
1992 1496.78 a 1274.00 1206.50 814.00 304.50 197.00 124.00 137.00 291.00 659.50 1127.50 1433.50 9065.28
1993 1593.50 1419.50 1164.50 818.50 382.50 170.00 28.50 55.50 407.00 707.00 1146.50 1393.50 9286.50
1994 1971.00 1522.50 1086.50 731.50 332.50 88.00 54.50 109.50 181.00 511.00 913.00 1272.50 8773.50
1995 1523.50 1400.50 1067.00 884.50 369.00 78.50 31.50 12.00 320.00 610.00 1323.00 1605.00 9224.50
1996 1820.50 1514.50 1398.00 903.00 440.00 112.50 94.55 a 29.00 278.50 641.00 1193.00 1484.00 9908.55
1997 1706.00 1323.50 1240.50 781.00 529.50 73.50 62.00 110.50 206.50 576.50 1099.00 1237.00 8945.50
1998 1448.00 980.50 1127.00 539.50 166.00 161.00 13.50 9.00 123.00 508.50 883.00 1285.00 7244.00
1999 1675.00 1174.44 a 1077.50 577.50 256.50 110.00 9.50 43.00 265.50 624.00 785.00 1376.00 7973.94
2000 1631.00 1219.00 862.00 719.50 297.00 142.50 48.50 42.00 238.00 471.50 1010.50 1755.50 8437.00
2001 1410.50 1444.50 1164.50 620.50 266.08 a 137.07 a 49.00 24.00 237.00 616.50 692.00 1200.00 7861.65
2002 1303.00 1119.00 1356.50 763.50 489.50 95.00 8.50 28.50 187.00 785.50 1079.00 1324.00 8539.00
2003 1639.00 1519.00 1195.50 745.50 398.50 128.00 29.00 20.00 240.00 603.00 1024.50 1297.00 8839.00
2004 1766.50 1300.50 1073.00 666.00 420.50 149.50 50.50 159.00 105.50 557.00 904.50 1471.50 8624.00
2005 1648.50 1191.00 1235.50 566.00 396.50 19.00 20.00 30.50 134.50 489.00 980.50 1451.50 8162.50
2006 1247.50 1381.50 1096.00 507.50 312.00 59.00 4.50 14.00 169.00 f 764.00 0.00 z 1279.00 6665.00
2007 1477.50 1554.00 1067.00 738.00 277.50 58.00 0.00 z 50.00 210.00 453.50 1038.50 1555.00 8479.00
2008 1577.50 1556.50 1353.00 764.50 451.50 102.50 15.00 45.00 184.50 622.00 1024.50 1687.50 9384.00
2009 1887.00 1350.50 1193.00 727.00 367.50 169.00 91.00 98.50 137.00 761.00 793.00 1520.50 9095.00
2010 1519.00 1283.00 889.50 522.50 310.00 120.50 3.50 19.00 311.00 513.50 960.50 1472.50 7924.50
2011 1695.00 1355.00 1250.50 804.50 390.00 110.50 6.50 3.50 p 339.50 577.00 963.50 1368.50 8860.50
2012 1526.50 1291.00 740.00 710.00 291.00 106.00 5.50 110.50 371.50 465.00 j 0.00 z 0.00 z 5152.00
Period of Record Statistics
MEAN 1666.41 1416.90 1203.34 717.49 363.08 124.34 40.93 76.03 268.41 604.76 1033.67 1487.14 9011.70
S.D. 183.10 153.10 154.09 123.31 101.89 51.79 26.73 42.07 69.72 121.93 123.28 165.82 602.44
SKEW 0.11 0.06 -0.57 0.02 0.08 0.38 0.61 0.55 0.35 -0.01 -0.05 0.40 0.16
MAX 2180.50 1909.00 1572.00 1035.50 641.50 254.00 124.00 179.00 495.54 936.50 1323.00 1916.00 10730.23
MIN 1230.24 980.50 740.00 427.50 138.00 19.00 1.00 9.00 105.50 265.50 692.00 1134.00 7244.00
NO YRS 102 106 106 105 104 102 102 103 105 104 103 103 88