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 1242.00 744.50 0.00 z 0.00 z 0.00 0.00 z 205.50 499.50 1044.50 1538.00 5274.00
1894 1579.00 1389.00 908.50 493.00 251.50 37.50 3.50 11.00 153.50 498.50 1124.50 1195.00 7644.50
1895 1800.50 1539.00 1124.50 426.50 267.50 43.00 24.50 12.50 143.50 702.00 1048.00 1404.00 8535.50
1896 1499.00 1259.50 1200.00 451.50 132.00 56.50 23.00 45.50 299.00 624.00 1228.50 1244.50 8063.00
1897 1669.00 1262.50 1217.50 604.00 299.50 126.00 9.50 64.00 86.00 377.50 1090.00 1629.00 8434.50
1898 1408.50 1272.00 950.00 606.00 230.00 26.00 14.00 21.50 124.50 635.50 1089.00 1641.50 8018.50
1899 1629.50 1652.00 1472.50 579.50 246.50 29.50 9.50 7.50 257.50 417.00 756.50 1494.00 8551.50
1900 1419.00 1590.50 1286.50 459.00 184.50 30.50 8.50 0.00 193.50 300.00 1124.50 1351.00 7947.50
1901 1500.63 d 1513.22 e 1123.50 527.50 228.00 69.50 4.50 8.50 217.50 438.00 1013.00 1539.67 a 8183.51
1902 1474.50 948.00 h 911.92 a 602.68 b 199.43 a 141.21 a 8.50 j 4.00 z 261.50 478.50 0.00 z 0.00 z 4069.74
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 1716.48 d 1581.02 a 1175.50 736.03 a 205.00 47.00 32.15 d 47.00 152.50 389.29 e 242.50 x 1402.00 7483.97
1905 1790.50 1522.50 901.50 617.50 315.50 54.50 32.55 a 8.50 97.50 577.00 0.00 z 0.00 z 5917.55
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 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 1778.00 1438.00 1165.00 622.50 246.50 71.50 7.50 1.50 172.00 585.00 1049.00 1413.50 8550.00
1938 1491.00 1094.50 768.50 513.00 241.00 29.50 0.00 5.00 124.00 315.50 937.00 1372.50 6891.50
1939 1318.00 1378.00 999.50 605.00 118.50 44.00 0.50 19.00 125.50 469.00 798.50 1081.00 6956.50
1940 1758.00 1258.50 1189.50 619.00 289.00 32.50 14.50 48.50 133.00 340.00 0.00 z 1237.42 a 6919.92
1941 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 58.50 9.00 21.50 107.00 432.00 838.00 1151.65 a 2617.65
1942 1456.00 1293.50 924.50 401.00 314.50 74.50 11.50 35.50 278.00 482.50 913.00 1525.50 7710.00
1943 1672.50 1275.00 1253.50 605.00 287.50 55.00 1.00 19.50 264.50 538.50 373.50 s 0.00 z 5972.00
1944 0.00 z 0.00 z 0.00 z 658.00 178.50 57.00 15.00 26.50 135.50 426.50 800.00 1472.00 3769.00
1945 1584.00 1234.50 731.00 589.00 425.00 160.00 32.50 28.00 234.00 514.00 960.00 1560.50 8052.50
1946 1446.00 1210.50 705.50 432.00 324.00 100.00 1.00 64.50 183.00 389.00 910.00 1266.00 7031.50
1947 1370.00 1431.50 1132.00 667.00 405.00 111.50 17.50 0.00 161.00 200.00 1101.72 a 1354.50 7951.72
1948 0.00 z 0.00 z 0.00 z 386.90 a 266.50 25.00 2.50 10.50 57.50 465.50 817.00 1350.00 3381.40
1949 1538.00 1367.00 1042.50 515.00 165.50 20.00 1.00 12.00 216.00 144.00 n 818.50 1330.00 7025.50
1950 1523.50 1314.50 1208.00 750.00 263.00 76.00 16.50 72.50 134.00 316.72 a 1066.50 1628.50 8369.72
1951 1652.50 1263.50 1276.50 693.50 159.50 89.00 20.50 59.93 a 265.18 b 514.50 1173.00 1463.95 b 8631.56
1952 1513.50 1138.50 1152.50 533.00 283.00 30.50 8.50 37.50 178.50 436.00 k 896.00 1289.00 7060.50
1953 1431.68 a 1206.50 992.50 726.43 b 258.50 28.89 c 12.50 9.54 e 166.00 258.50 i 799.50 1269.97 a 6902.01
1954 1543.59 b 891.33 a 1095.00 457.50 382.50 47.50 0.00 2.50 h 113.57 b 488.25 e 807.00 1275.50 7101.74
1955 1489.50 0.00 z 0.00 z 91.50 s 140.50 63.10 a 0.00 10.00 111.50 451.00 1107.50 1526.00 4899.10
1956 1539.00 1356.00 1164.50 655.00 235.50 24.00 8.00 22.00 190.00 286.00 943.00 1274.00 7697.00
1957 1645.50 1116.50 1030.50 516.50 267.00 41.00 0.00 29.00 217.50 546.00 988.50 1225.00 7623.00
1958 1377.00 1392.50 1019.50 532.00 169.50 102.00 14.00 33.00 142.00 376.50 842.00 1523.50 7523.50
1959 1673.50 1392.50 1101.00 537.00 166.00 39.00 13.50 2.50 190.00 620.00 1198.50 1079.00 8012.50
1960 1396.50 1289.50 1357.00 534.50 228.50 67.50 16.00 8.50 174.00 468.50 824.00 1425.50 7790.00
1961 1546.50 1068.15 a 1039.03 b 750.50 334.50 52.50 7.00 11.37 a 229.00 432.50 924.50 1501.43 a 7896.98
1962 1705.00 c 1362.50 1223.00 660.00 a 159.00 69.00 22.50 16.00 252.41 a 424.70 a 859.50 1393.50 8147.11
1963 1874.00 1427.00 958.00 509.48 a 315.68 a 34.50 3.50 48.57 a 132.12 d 198.92 a 775.00 1680.20 a 7956.96
1964 1321.00 1127.10 c 1142.35 a 546.11 c 108.50 46.55 a 1.00 49.00 182.50 536.50 842.50 1484.00 7387.11
1965 1619.00 1412.00 1361.00 656.00 176.50 35.50 7.50 40.50 259.50 442.50 889.50 1104.00 8003.50
1966 1791.50 1296.00 890.50 685.50 352.00 45.50 1.00 34.00 160.50 462.50 919.00 1345.40 a 7983.40
1967 1425.50 1450.50 974.00 549.00 382.50 20.00 45.00 45.50 156.50 524.50 995.50 1268.50 7837.00
1968 1494.50 1358.00 769.50 471.72 a 318.50 52.24 a 14.50 35.50 134.00 0.00 z 917.50 1417.50 6983.47
1969 1653.33 a 1250.50 1252.50 500.00 219.00 149.50 11.00 0.00 137.50 582.50 912.00 1374.00 8041.83
1970 1802.13 a 1318.00 1144.50 549.00 213.50 39.50 7.00 3.00 224.00 486.50 951.00 1422.00 8160.13
1971 1780.00 1333.50 1188.00 547.00 300.50 15.50 30.00 25.50 143.50 335.00 907.50 1358.00 7964.00
1972 1786.00 1521.00 1168.00 716.00 227.50 84.00 36.00 43.50 179.00 645.50 1002.00 1590.50 8999.00
1973 1509.50 1222.50 798.00 665.00 348.00 19.00 3.50 23.50 191.50 347.00 900.00 1498.00 7525.50
1974 1586.00 1353.00 1113.00 0.00 z 276.00 g 100.00 4.50 40.82 a 314.50 520.00 891.50 1302.00 7225.32
1975 1544.00 1326.50 1390.50 804.00 197.50 48.00 27.50 3.50 286.55 a 469.00 817.50 1335.00 8249.55
1976 1621.50 1112.50 1030.50 497.00 316.00 49.50 6.50 55.00 258.50 708.50 1167.00 1711.50 8534.00
1977 2063.50 1243.00 821.00 414.50 87.50 52.50 6.00 69.50 156.00 574.50 991.50 1550.50 8030.00
1978 1893.50 1617.00 1200.00 600.00 261.50 51.50 21.00 26.00 126.50 578.00 1020.00 1588.00 8983.00
1979 2025.50 1650.50 1164.50 710.50 342.00 65.00 12.50 78.00 176.50 576.00 982.00 1270.00 9053.00
1980 1546.00 1493.50 1223.00 583.50 243.50 60.00 10.50 21.50 204.00 681.50 921.50 1415.00 8403.50
1981 1477.50 1180.50 913.00 496.50 328.50 50.00 27.50 39.00 242.00 659.50 879.00 1517.50 7810.50
1982 1956.00 1459.50 1173.00 756.00 193.00 159.00 3.50 73.50 243.00 528.00 996.50 1263.50 8804.50
1983 1422.50 1140.50 996.50 763.00 407.50 81.50 7.50 3.00 217.00 552.50 901.50 1913.00 8406.00
1984 1627.50 1123.00 1268.00 591.00 370.00 32.00 34.50 32.00 279.50 494.00 1002.50 1393.50 8247.50
1985 1741.17 a 1468.00 919.00 490.50 168.00 117.00 9.50 57.00 228.50 559.00 1181.00 1823.00 8761.67
1986 1566.50 1372.50 1002.50 460.50 214.50 33.50 19.00 68.00 162.00 506.50 1142.50 1354.00 7902.00
1987 1459.00 1037.50 872.50 474.00 177.50 24.00 10.00 66.00 157.00 692.50 820.50 1269.50 7060.00
1988 1769.00 1569.00 1000.50 614.50 147.00 28.00 6.50 31.00 155.00 704.50 937.00 1468.00 8430.00
1989 1315.50 1541.50 1159.00 654.50 310.50 97.00 0.50 20.50 229.50 503.50 1113.00 1712.00 8657.00
1990 1242.00 1261.00 908.00 628.50 388.00 67.50 15.50 16.00 173.50 575.50 826.00 1543.00 7644.50
1991 1781.00 1218.00 985.50 540.00 230.50 14.00 23.50 24.50 284.00 580.00 1211.50 1357.50 8250.00
1992 1381.00 1113.00 1042.00 700.50 269.50 97.50 78.00 108.50 257.50 560.50 1025.00 1408.50 8041.50
1993 1638.50 1405.50 1213.00 736.50 303.50 87.50 6.00 31.00 339.50 585.00 1025.50 1349.00 8720.50
1994 1869.00 1557.00 1003.00 606.00 284.50 44.50 32.00 70.00 136.00 447.50 851.50 1272.50 8173.50
1995 1571.00 1307.00 996.50 740.00 325.50 47.00 21.00 1.50 255.50 565.50 1197.50 1461.50 8489.50
1996 1717.00 1429.00 1242.50 730.00 382.00 73.50 12.00 21.50 221.00 526.00 1200.00 1539.00 9093.50
1997 1695.00 1278.00 1074.00 699.00 445.50 34.50 46.00 46.50 162.50 542.00 1064.50 1256.00 8343.50
1998 1409.00 963.50 1085.50 511.50 134.50 107.00 3.00 0.50 94.00 491.00 833.00 1210.00 6842.50
1999 1655.40 a 1050.00 1002.50 530.00 204.50 70.50 3.50 9.50 222.50 564.50 758.00 1304.50 7375.40
2000 1548.50 1133.50 801.50 592.00 208.50 71.00 18.50 10.50 209.00 419.50 1033.50 1819.50 7865.50
2001 1481.00 1490.00 1233.50 511.00 242.50 109.00 13.50 16.50 233.00 577.00 578.50 1162.50 7648.00
2002 1222.50 1107.00 1253.50 621.00 355.50 45.00 3.50 21.50 146.00 686.00 1021.00 1277.50 7760.00
2003 1606.50 1405.00 1067.50 604.50 312.50 78.50 11.00 3.00 210.50 521.50 987.00 1275.00 8082.50
2004 1618.00 1332.50 899.50 561.00 199.50 h 89.50 20.00 106.50 103.50 520.00 860.50 1353.50 7464.50
2005 1593.50 1094.00 1085.50 477.00 365.00 13.00 16.50 30.50 118.00 510.00 901.50 1544.00 7748.50
2006 1148.50 1297.50 1024.00 460.50 314.00 53.00 2.50 12.00 263.00 665.00 866.00 1156.50 7262.50
2007 1453.50 1580.00 973.50 656.50 166.00 36.50 10.00 17.50 162.00 396.50 969.00 1517.00 7938.00
2008 1668.50 1566.50 1213.00 679.00 348.50 38.50 2.00 29.00 135.50 558.50 926.50 1659.50 8825.00
2009 1865.50 1267.50 1026.00 639.00 293.00 96.00 47.50 56.50 117.00 701.00 748.50 1490.50 8348.00
2010 1703.50 1421.00 900.50 421.00 287.00 29.50 0.00 14.00 195.50 478.00 909.50 1568.50 7928.00
2011 1682.00 1316.50 1104.50 633.50 305.00 51.00 1.50 7.50 229.50 437.00 819.00 1217.00 7804.00
2012 1362.00 1098.00 537.00 524.00 136.00 36.50 0.00 45.00 193.50 609.00 838.45 a 1264.50 6643.95
2013 1483.50 1311.50 1293.00 35.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4088.00
Period of Record Statistics
MEAN 1588.26 1322.42 1069.91 587.22 260.67 59.90 13.43 30.14 188.02 504.81 953.23 1410.16 8031.45
S.D. 178.55 166.72 169.58 100.28 81.67 33.46 13.42 24.29 58.80 111.45 131.33 170.60 539.35
SKEW 0.20 -0.11 -0.38 0.08 0.05 1.08 1.89 1.01 0.25 -0.38 0.16 0.48 -0.32
MAX 2063.50 1652.00 1472.50 804.00 445.50 160.00 78.00 108.50 339.50 708.50 1228.50 1913.00 9093.50
MIN 1148.50 891.33 537.00 386.90 87.50 13.00 0.00 0.00 57.50 198.92 578.50 1079.00 6643.95
NO YRS 85 83 85 85 84 87 87 85 88 84 83 85 71