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 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
1893 0.00 z 0.00 z 758.00 n 893.50 335.00 i 25.50 11.00 113.50 297.00 703.00 1211.00 1858.34 c 5112.84
1894 1892.50 1586.00 1113.93 a 633.00 345.50 39.50 21.50 30.50 212.00 609.00 1283.50 1353.50 9120.43
1895 2040.00 1632.00 1289.00 489.00 329.00 68.00 36.50 79.50 242.00 777.00 1156.50 1513.00 9651.50
1896 1696.50 1430.50 1403.50 671.50 183.50 65.00 32.50 81.50 307.50 740.00 1437.50 1410.50 9460.00
1897 1871.50 1383.50 1405.00 661.50 359.50 205.86 a 9.50 0.00 z 126.50 533.50 1195.50 0.00 z 7751.86
1898 1498.50 1427.50 1137.00 658.50 339.00 60.50 33.58 a 57.00 221.50 744.50 1222.50 1695.70 a 9095.78
1899 1744.50 1757.50 1611.00 642.00 370.50 78.00 17.00 33.00 336.00 592.00 859.50 1513.00 9554.00
1900 1493.00 1707.00 1275.65 a 482.00 229.00 82.50 26.50 3.00 243.50 316.50 1213.50 1517.50 8589.65
1901 1711.50 1535.15 b 1197.00 568.00 263.00 97.20 e 7.00 26.00 251.00 489.50 1116.50 1712.50 8974.35
1902 1645.00 1421.00 986.50 683.00 236.00 146.50 f 19.52 d 54.50 285.50 605.50 973.00 1676.00 8585.52
1903 1693.00 1574.00 1101.57 b 657.50 274.35 a 123.50 52.70 a 99.50 315.50 587.00 1184.00 1763.00 9425.62
1904 1902.37 a 1863.50 1294.00 823.97 a 321.00 107.78 c 52.50 78.00 274.00 591.50 863.28 a 404.00 v 8171.89
1905 1907.50 1575.50 994.50 710.50 439.50 93.50 39.00 18.50 127.50 691.50 994.50 1446.50 9038.50
1906 1552.50 1530.50 1442.50 487.00 373.00 90.50 37.00 52.00 129.00 599.00 1103.50 1613.00 9009.50
1907 2009.00 1438.50 1214.00 935.50 610.00 116.50 20.00 60.00 320.50 624.50 1020.50 1413.27 c 9782.27
1908 1550.00 1382.50 1223.47 a 593.50 367.00 129.00 25.50 74.40 a 141.00 560.00 939.00 1525.00 8510.37
1909 1722.50 1492.50 1221.00 900.00 361.50 76.50 12.00 17.50 201.00 658.50 932.00 1702.50 9297.50
1910 1622.00 1679.50 689.00 533.50 443.00 0.00 z 14.50 0.00 z 218.50 458.00 1272.41 a 1534.50 a 8464.91
1911 1879.50 0.00 z 0.00 z 604.50 212.50 32.50 39.50 92.50 275.50 743.43 d 1388.00 1437.76 b 6705.68
1912 0.00 z 1624.50 1371.50 586.50 291.50 149.00 16.50 0.00 z 0.00 z 0.00 z 944.50 1361.00 6345.00
1913 0.00 z 1579.50 0.00 z 527.00 399.00 89.00 23.50 0.00 z 272.50 652.50 0.00 z 1043.50 4586.50
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 687.00 1027.50 1777.33 a 3491.83
1917 1902.50 1753.00 1265.50 750.50 438.65 a 199.66 a 35.50 75.43 a 193.39 b 848.22 b 857.07 a 1856.00 10175.42
1918 2020.50 1411.50 901.00 688.00 289.91 d 53.50 k 18.00 k 0.00 z 393.46 d 0.00 z 0.00 z 0.00 z 5704.37
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 1300.50 717.50 233.50 75.00 10.00 7.00 220.00 156.00 s 1129.00 1541.50 5234.00
1938 1797.50 1339.33 a 950.50 626.25 b 360.50 36.00 13.50 0.00 z 49.00 y 416.00 607.50 l 1501.50 7041.08
1939 501.00 u 1699.19 a 1209.00 858.50 191.50 64.50 38.00 65.00 264.50 716.50 1008.50 0.00 z 6115.19
1940 1918.38 a 1417.00 1274.50 690.00 296.50 138.50 12.50 94.00 172.00 428.50 1191.92 d 1473.50 9107.31
1941 1595.97 b 1073.00 i 1255.50 490.50 179.50 96.50 10.50 47.50 191.00 496.50 906.00 1269.00 6538.47
1942 1441.50 1388.50 945.00 0.00 z 166.50 n 120.00 38.50 36.50 306.00 522.00 1010.00 1657.00 7465.00
1943 1915.00 738.00 l 0.00 z 0.00 z 330.67 a 58.50 0.00 z 0.00 z 0.00 z 0.00 z 1110.52 a 1367.50 4782.18
1944 1322.00 1455.00 1319.50 743.00 266.00 67.50 12.50 53.00 220.50 525.00 934.00 1492.65 a 8410.65
1945 0.00 z 1387.00 283.00 r 780.00 473.50 199.00 34.50 12.50 295.50 616.50 0.00 z 0.00 z 3798.50
1946 0.00 z 1492.00 877.00 547.50 399.50 95.00 12.50 64.50 223.50 601.50 1117.00 1591.85 a 7021.85
1947 1524.00 628.00 q 1250.00 824.50 511.00 110.00 0.00 g 2.00 203.50 360.50 1263.50 1276.50 f 6049.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 17.00 45.00 137.50 547.48 c 726.50 j 1606.66 b 2353.64
1949 1738.50 1605.00 1349.61 c 533.00 h 0.00 z 0.00 z 6.50 y 51.00 333.00 556.50 954.50 1597.50 8185.61
1950 2073.50 1558.67 a 1405.50 1008.00 442.00 85.50 43.00 126.00 168.50 505.50 1222.00 1779.50 10417.67
1951 1932.00 1460.00 1490.50 796.00 209.50 156.50 28.50 72.00 355.00 652.00 1357.50 b 1721.50 10231.00
1952 1874.50 1364.50 1409.98 a 598.50 313.00 68.00 24.50 65.00 223.50 728.50 1029.50 1389.00 9088.48
1953 1681.50 1461.00 1198.00 819.00 351.00 102.50 30.50 11.50 220.50 382.50 894.50 1534.00 8686.50
1954 1962.50 1102.00 1273.00 682.50 481.50 71.50 16.00 48.00 256.00 628.00 881.00 1362.45 a 8764.45
1955 1723.00 1571.00 1382.50 436.50 168.50 71.00 3.00 14.50 244.50 525.00 1304.50 1802.50 9246.50
1956 1771.50 1649.50 1330.42 a 798.50 323.00 30.00 34.50 48.00 320.50 370.50 1004.50 1408.43 a 9089.35
1957 1874.98 a 1434.50 1232.00 646.03 a 352.22 b 90.50 0.00 d 40.00 272.50 635.50 c 1041.43 b 1364.00 e 8983.67
1958 1499.00 1572.85 b 1132.57 b 486.00 f 234.00 h 226.00 53.22 a 72.50 200.50 497.03 a 992.59 a 1641.00 7887.25
1959 1817.63 a 1475.50 1017.50 526.50 g 296.05 a 66.72 a 16.53 a 21.50 227.00 740.68 c 1310.50 1230.50 8220.12
1960 1717.50 1546.67 b 1519.50 675.00 277.50 91.00 19.00 19.00 238.50 525.00 998.50 1580.50 9207.67
1961 1702.42 a 1178.00 962.50 853.00 396.00 57.50 10.00 19.50 266.00 513.05 a 1039.50 1660.00 8657.47
1962 1829.00 1540.00 1272.50 772.76 a 255.50 88.00 18.00 10.85 a 270.50 470.00 890.00 1457.50 8874.61
1963 1941.50 1493.50 997.34 b 570.50 322.00 47.50 7.50 29.00 135.00 263.00 895.50 1786.00 8488.34
1964 1503.50 1341.50 1351.50 615.50 223.50 110.50 3.00 90.00 253.00 540.00 990.00 1744.50 8766.50
1965 1874.50 1581.46 b 1559.00 704.00 255.50 43.50 12.00 55.50 444.83 a 474.00 1027.50 1295.50 9327.29
1966 2107.50 1513.00 1036.50 796.00 392.50 79.00 2.50 84.00 257.50 584.50 1168.00 1581.00 b 9602.00
1967 1651.50 1678.00 1197.00 670.00 482.50 87.00 44.00 80.00 219.50 638.00 1056.00 1470.50 9274.00
1968 1724.50 1595.00 897.50 586.00 420.50 95.50 45.00 63.50 199.50 515.00 991.07 b 1360.50 g 7133.07
1969 1909.00 1419.00 1393.00 575.00 275.50 182.00 33.50 11.50 208.00 672.00 1029.50 1462.00 9170.00
1970 1911.50 1453.50 1420.00 734.00 330.00 58.00 14.00 28.50 241.00 586.50 1128.00 1623.50 9528.50
1971 1953.50 1441.00 1278.50 609.00 367.50 37.00 55.50 77.00 226.50 472.50 1044.50 1584.00 9146.50
1972 1926.50 1025.50 k 1301.50 742.50 227.50 82.50 34.50 51.00 256.50 672.00 1070.00 1784.00 8148.50
1973 1594.00 1335.50 862.00 659.50 325.50 46.50 13.00 15.50 265.50 378.00 1030.00 1571.00 8096.00
1974 1762.50 1456.50 1278.50 626.00 407.00 82.50 3.50 78.50 290.00 507.50 1000.00 1340.00 8832.50
1975 1679.00 1481.00 1416.00 912.00 221.50 82.00 16.50 32.50 289.00 484.50 981.50 1559.00 9154.50
1976 1799.50 1213.00 1209.50 485.50 307.50 33.50 13.50 37.50 216.00 757.50 1232.50 1766.00 9071.50
1977 2100.25 a 1282.50 938.50 433.50 95.00 39.00 5.50 85.50 205.00 550.50 1086.00 1721.00 8542.25
1978 1955.50 1618.50 1208.00 678.00 236.50 85.34 a 19.00 31.50 0.00 z 539.00 1129.00 1678.00 9178.34
1979 2079.00 1685.00 1263.00 830.50 452.50 104.50 14.00 64.00 161.00 622.50 1065.50 1307.00 9648.50
1980 1726.50 1547.50 1369.50 542.50 5.00 v 69.50 12.50 55.50 263.50 710.93 a 937.50 1529.50 8764.93
1981 1529.50 1239.50 953.00 549.50 324.50 67.00 32.00 35.00 253.00 634.50 856.50 1563.50 8037.50
1982 2117.50 1457.50 1252.00 723.00 177.50 165.50 5.50 61.00 252.50 545.00 1155.50 1330.00 9242.50
1983 1535.00 1177.00 1048.50 719.50 388.00 85.00 10.50 1.00 238.50 588.50 1017.00 1993.50 8802.00
1984 1696.00 1106.50 1305.00 609.00 329.00 45.00 12.50 18.50 344.00 474.50 1006.00 1571.00 8517.00
1985 1735.50 1459.50 975.50 471.50 158.00 142.50 13.50 78.50 270.50 613.50 1331.50 1877.50 9127.50
1986 1530.00 1474.00 1034.50 539.50 267.00 57.00 0.00 66.50 240.50 541.00 1156.50 1323.50 8230.00
1987 1412.00 995.00 886.00 373.00 160.00 23.50 7.50 40.50 143.50 649.50 875.50 1333.00 6899.00
1988 1798.50 1603.00 1077.00 559.50 80.50 14.50 2.50 28.50 166.00 674.50 1078.00 1503.50 8586.00
1989 1523.00 1677.00 1319.50 664.00 240.50 87.50 0.00 20.50 175.50 532.00 1180.50 1791.50 9211.50
1990 1301.50 1272.00 993.00 621.00 316.00 44.00 15.50 28.50 162.00 607.00 921.00 1587.50 7869.00
1991 1730.50 1196.50 1047.00 528.50 214.00 17.50 5.50 12.00 247.50 624.00 1256.50 1448.00 8327.50
1992 1426.00 1173.50 993.00 711.50 219.50 108.50 77.00 95.50 203.00 604.00 1124.50 1542.50 8278.50
1993 1694.50 1441.50 1209.00 672.50 285.50 124.00 21.50 35.50 329.00 618.50 1158.00 1510.00 9099.50
1994 2049.50 1594.00 1041.00 618.00 221.00 38.00 9.50 52.50 152.50 459.50 915.50 1363.50 8514.50
1995 1619.00 1428.50 1076.50 785.00 321.50 47.00 10.50 3.50 244.00 595.00 1222.00 1559.00 8911.50
1996 1934.50 1481.50 1375.00 792.00 344.00 55.50 14.50 8.00 225.50 522.50 1296.50 1714.00 9763.50
1997 1848.50 1337.00 1224.50 707.00 405.50 6.50 41.00 44.00 118.00 513.00 1167.93 a 1236.00 8648.93
1998 1567.50 979.50 1099.00 494.50 114.00 120.00 5.00 1.50 104.00 470.00 944.00 1328.00 7227.00
1999 1733.50 1129.50 1025.00 573.50 219.00 74.00 2.50 14.00 221.50 555.00 764.00 1287.50 7599.00
2000 1614.50 1212.00 820.50 626.00 220.50 116.50 24.00 18.00 206.00 457.50 1068.00 1892.00 8275.50
2001 1447.50 1592.00 1225.50 608.50 229.00 71.50 12.50 14.50 218.50 579.50 682.00 1289.00 7970.00
2002 1356.00 1096.00 1427.00 685.50 416.00 29.50 6.00 19.50 154.50 809.50 1052.50 1302.00 8354.00
2003 1631.00 1468.00 1140.00 591.50 303.00 73.50 3.50 8.00 207.00 489.50 1101.50 1319.50 8336.00
2004 1793.00 1342.00 981.00 562.00 377.00 123.50 39.50 109.50 85.50 530.50 876.50 1394.50 8214.50
2005 1741.50 1166.50 1111.50 453.00 340.00 6.72 a 13.00 22.96 d 95.40 e 0.00 z 0.00 z 0.00 z 4950.59
2006 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
2007 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 529.50 1047.00 1719.50 3296.00
2008 1813.00 1632.50 1354.00 815.50 483.00 140.00 33.50 46.50 264.00 650.50 1032.50 1808.00 10073.00
2009 2032.50 1462.00 1312.50 742.00 409.50 189.00 88.00 101.50 121.50 825.50 833.00 1641.50 9758.50
2010 1781.00 1481.50 946.50 496.00 371.50 108.00 9.00 30.00 345.50 524.00 1068.50 1674.00 8835.50
2011 1890.50 1493.00 1391.50 749.00 416.00 144.00 12.00 31.50 300.50 514.00 994.50 1302.50 9239.00
2012 1469.50 1290.00 795.00 641.00 298.50 72.50 0.00 80.00 277.50 713.00 1056.00 1546.00 8239.00
2013 1705.00 1503.50 1452.50 44.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4661.00
Period of Record Statistics
MEAN 1748.03 1450.88 1188.72 659.29 314.01 86.49 21.03 46.56 233.47 576.43 1063.30 1541.83 8904.08
S.D. 195.16 175.97 192.22 126.09 98.66 46.11 16.77 30.34 67.48 111.27 144.99 183.87 662.11
SKEW -0.16 -0.52 -0.26 0.27 0.11 0.83 1.36 0.43 0.16 -0.03 0.20 0.04 -0.34
MAX 2117.50 1863.50 1611.00 1008.00 610.00 226.00 88.00 126.00 444.83 848.22 1437.50 1993.50 10417.67
MIN 1301.50 979.50 689.00 373.00 80.50 6.50 0.00 1.00 85.50 263.00 682.00 1043.50 6899.00
NO YRS 90 90 92 91 91 92 93 90 93 94 93 91 70