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
1914 0.00 z 0.00 z 0.00 z 0.00 z 67.00 l 29.00 2.50 66.50 153.00 371.50 918.50 1749.50 3290.50
1915 1737.00 1240.50 1263.50 344.50 386.00 154.50 56.00 76.00 193.00 474.50 992.50 1450.00 8368.00
1916 1985.03 a 1647.50 1270.50 663.50 344.00 145.50 0.00 57.00 254.00 653.00 695.00 h 1802.50 8822.53
1917 1903.00 1727.50 1203.00 737.00 356.00 124.14 a 17.05 a 40.00 200.50 816.00 819.50 1838.50 9782.19
1918 1966.00 1403.50 862.50 663.00 241.50 52.00 15.00 13.00 312.00 468.50 914.00 1377.00 8288.00
1919 1403.00 1456.00 1179.00 597.00 295.50 64.50 0.00 20.50 141.00 780.00 1302.00 1693.00 8931.50
1920 1813.50 1410.50 1157.00 880.00 258.50 80.50 12.50 26.00 121.00 377.00 1046.00 1422.00 8604.50
1921 1442.00 1150.00 1062.27 a 544.50 265.00 36.50 4.00 25.50 148.50 478.50 0.00 z 0.00 z 5156.77
1922 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 24.00 16.00 138.00 534.00 876.00 1564.00 3152.00
1923 1608.38 a 1636.38 b 1357.00 683.00 334.28 a 65.50 2.50 43.50 127.50 569.50 841.00 1229.50 8498.05
1924 1887.00 1308.50 1139.00 665.50 467.58 a 158.50 54.00 69.00 323.50 453.50 1116.50 1848.00 9490.58
1925 1763.50 1356.00 1019.50 471.50 441.00 115.00 60.00 13.50 75.00 p 962.00 0.00 z 0.00 z 6202.00
1926 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 150.00 a 10.00 20.00 294.00 596.00 1232.50 1669.50 3972.00
1927 1603.50 1280.00 1012.00 592.50 381.00 130.00 34.50 63.00 225.50 465.00 1169.50 1951.50 8908.00
1928 1524.50 1261.00 1026.00 805.50 182.00 125.00 6.50 40.50 244.50 548.00 910.00 1241.00 7914.50
1929 2036.50 1641.50 958.50 549.00 398.00 84.00 0.50 8.00 297.00 506.00 1148.00 1556.50 9183.50
1930 1897.50 1052.00 1059.50 520.00 264.50 36.00 10.50 5.50 177.00 619.50 957.00 1307.00 7906.00
1931 1247.00 963.50 1053.00 529.50 0.00 z 31.00 5.00 39.00 99.50 416.50 896.00 1275.00 6555.00
1932 1596.00 1361.50 1345.50 599.50 228.00 1.50 18.00 6.50 151.00 651.00 1120.50 1585.00 8664.00
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 a 10.00 76.00 460.50 960.00 1457.00 a 2963.50
1949 1710.50 1632.00 1199.00 525.50 197.50 30.00 8.00 6.00 240.00 479.50 847.50 1548.00 8423.50
1950 2065.00 1500.50 1297.50 895.00 395.50 46.03 a 12.50 56.50 130.50 467.00 1144.00 1727.00 9737.04
1951 1843.00 1376.85 b 1516.50 729.50 136.50 115.00 9.00 19.50 256.67 c 583.83 d 1181.38 a 1689.50 a 9457.23
1952 1197.50 j 1300.86 a 1327.50 538.50 222.17 a 26.38 a 1.00 4.50 29.50 n 227.00 t 863.79 a 1344.50 5629.20
1953 1565.50 1276.50 1053.50 450.50 k 230.00 k 18.50 h 3.62 a 3.00 141.50 304.00 828.62 a 1435.50 6611.74
1954 1476.00 f 973.78 a 1147.50 597.00 402.00 55.00 3.50 5.00 175.00 552.50 822.93 a 1354.18 a 6088.39
1955 1600.50 1545.00 1290.78 b 346.00 112.00 39.50 0.00 3.00 167.00 419.00 1226.11 c 1748.50 8497.39
1956 1658.00 1557.50 1232.00 761.38 a 251.10 a 10.50 3.00 18.71 b 180.50 309.00 994.66 a 1303.03 a 8279.38
1957 1741.68 a 1272.50 1065.37 a 593.04 b 262.50 30.50 0.00 14.00 176.00 486.00 940.00 1175.70 d 7757.29
1958 1265.04 e 1357.48 a 1027.50 510.00 152.70 d 100.18 b 12.18 c 17.00 93.62 a 369.50 890.00 c 1526.00 7321.20
1959 1659.57 b 1391.50 912.50 536.00 227.50 22.50 1.00 2.00 144.00 656.68 a 1183.27 d 1064.85 a 7801.37
1960 1568.50 1388.78 b 1416.50 582.50 202.00 37.50 5.50 3.50 135.50 406.50 845.89 b 1501.50 8094.17
1961 1553.32 c 1128.30 a 860.52 b 713.57 b 297.00 19.50 1.50 2.00 253.33 c 442.55 b 1006.50 1225.50 h 6278.09
1962 1693.00 1405.50 1228.24 b 693.50 199.50 66.50 17.00 3.50 198.00 378.00 822.00 1331.21 e 8035.95
1963 1832.50 1378.50 910.37 a 545.50 260.92 a 31.00 0.00 16.00 82.00 201.00 828.50 1668.50 7754.78
1964 1379.00 1221.50 1271.50 515.89 b 147.50 55.00 0.00 32.50 196.50 450.02 a 938.50 1691.50 7899.41
1965 1829.50 1454.44 a 1437.50 622.50 208.50 9.00 4.50 36.50 399.50 374.50 983.00 1188.00 8547.44
1966 1990.00 1460.00 964.50 751.00 343.58 a 54.50 0.00 53.73 a 163.00 492.50 1143.00 1497.50 8913.32
1967 1593.50 1562.00 1019.50 624.00 411.50 43.50 34.00 40.00 122.50 552.00 969.00 1385.50 8357.00
1968 1604.50 1483.50 769.50 538.50 364.00 50.00 9.50 33.00 152.00 489.50 934.00 1595.50 8023.50
1969 1936.00 1364.00 1397.50 561.00 222.50 154.00 11.00 1.50 134.50 635.00 941.00 1435.50 8793.50
1970 1902.00 1401.00 1271.00 653.50 243.50 32.00 1.50 2.50 177.50 504.50 1081.00 1557.00 8827.00
1971 1870.00 1364.00 1077.00 497.00 267.50 25.00 26.50 18.50 175.50 434.50 1008.00 1567.50 8331.00
1972 1808.00 1644.50 1181.00 664.00 228.00 51.50 20.50 32.00 186.50 612.00 1051.00 1769.50 9248.50
1973 1553.00 1230.50 815.50 594.00 259.50 21.50 9.00 2.50 207.50 318.00 1006.50 1556.00 7573.50
1974 1776.00 1369.50 1152.50 586.50 345.00 43.50 0.00 43.50 213.00 420.50 945.50 1265.50 8161.00
1975 1556.00 1470.00 1348.00 844.00 201.50 49.00 14.50 15.00 227.50 426.00 918.00 1472.00 8541.50
1976 1665.50 1067.82 a 1086.00 448.00 238.50 21.50 3.00 2.00 156.00 624.28 b 1114.50 1605.59 b 8032.68
1977 1999.00 1182.50 924.00 371.00 45.00 18.50 3.62 a 33.00 146.50 492.00 1051.03 a 1661.50 7927.65
1978 1937.50 1578.50 1165.00 651.00 185.00 37.00 6.50 9.00 103.50 462.00 1135.00 1608.00 8878.00
1979 2010.00 1729.00 1293.22 a 790.50 390.00 49.00 6.00 30.50 101.50 565.50 1070.00 1211.00 9246.22
1980 1605.50 1489.00 1253.50 484.50 167.00 32.00 1.50 21.00 190.00 576.00 852.50 1495.00 8167.50
1981 1499.00 1183.50 872.00 458.00 241.00 38.50 7.00 10.00 164.00 552.50 822.00 1640.00 7487.50
1982 2133.00 1452.00 1178.00 687.00 172.50 110.00 0.00 36.50 209.50 528.50 1127.00 1285.00 8919.00
1983 1409.50 1122.50 1049.50 699.50 307.00 55.50 8.00 0.00 192.50 541.00 972.50 1977.50 8335.00
1984 1615.00 1115.50 1281.00 562.50 266.00 23.00 4.00 f 3.00 271.50 483.50 932.00 1556.00 8109.00
1985 1677.50 1375.50 903.00 411.50 120.50 97.50 0.00 38.00 255.50 537.00 1347.50 1799.50 8563.00
1986 1467.00 1440.00 972.00 549.50 207.50 16.50 0.00 45.00 197.00 475.00 1114.00 1184.50 7668.00
1987 1314.00 936.00 933.50 334.00 0.00 z 14.00 5.50 30.50 110.50 589.00 858.50 1279.00 6404.50
1988 1692.00 1471.50 1001.50 500.50 77.00 4.00 0.00 20.00 129.50 607.00 1038.50 1392.50 7934.00
1989 1452.50 1610.00 1269.00 608.50 190.50 79.00 0.00 6.50 162.50 500.00 1103.00 1711.00 8692.50
1990 1199.00 1180.50 919.50 587.50 272.50 33.50 6.00 20.50 128.50 533.50 861.50 1516.50 7259.00
1991 1616.00 1087.50 1010.00 478.50 215.00 15.50 2.50 4.50 182.50 560.00 1194.50 1333.00 7699.50
1992 1336.00 1071.50 898.00 658.00 188.50 83.50 53.50 66.50 162.00 535.00 1120.00 0.00 z 6172.50
1993 1728.00 1460.00 1180.50 624.00 222.50 104.50 10.00 12.50 255.50 551.50 1124.00 1491.00 8764.00
1994 2047.00 1605.00 1028.00 547.00 172.00 15.50 10.00 36.00 91.00 420.50 859.50 1338.50 8170.00
1995 1599.50 1368.00 1087.50 753.50 256.50 29.00 4.50 1.00 194.00 576.00 1157.00 1507.50 8534.00
1996 1898.00 1419.00 1334.00 709.50 320.50 36.50 3.00 1.00 190.00 477.00 0.00 z 1758.00 8146.50
1997 1870.50 1349.00 1245.50 709.50 299.50 0.00 26.50 30.50 81.00 438.00 1131.50 1185.00 8366.50
1998 1581.00 1008.00 1153.50 447.00 115.00 83.50 0.00 0.00 58.50 434.00 927.50 1258.50 7066.50
1999 1717.50 1057.50 917.50 521.50 180.50 46.00 0.50 3.50 191.50 515.00 701.00 1217.50 7069.50
2000 1611.00 1151.00 785.00 565.50 178.50 69.00 23.50 4.00 154.00 0.00 z 1120.00 1892.00 7553.50
2001 1455.50 1594.00 1263.00 597.00 161.50 39.00 2.50 4.00 150.50 523.00 642.50 1321.63 a 7754.13
2002 1344.50 1021.50 1346.00 626.00 337.00 21.50 1.50 9.50 124.50 758.50 998.00 1273.00 7861.50
2003 0.00 z 1429.50 1050.00 501.00 240.00 37.50 0.50 4.50 173.50 420.00 1095.00 1299.50 6251.00
2004 1715.50 1317.00 882.50 498.00 299.50 59.00 30.00 134.00 149.00 535.50 899.00 1391.00 7910.00
2005 1791.50 1241.00 1143.00 515.50 374.50 14.50 22.00 38.00 122.50 502.50 952.50 1505.50 8223.00
2006 1272.00 1492.50 1146.00 496.50 289.50 32.50 4.00 12.50 277.50 673.50 1009.50 1239.50 7945.50
2007 1580.00 1611.00 1034.50 735.50 208.00 39.50 4.00 48.50 212.50 464.00 1000.00 1671.50 8609.00
2008 1804.50 1648.50 1289.50 769.00 352.50 72.00 8.00 14.50 181.50 579.00 998.50 1800.00 9517.50
2009 1932.00 1504.50 1302.50 729.00 320.00 122.50 37.50 50.50 85.50 771.00 790.00 1652.50 9297.50
2010 1776.00 1557.00 979.00 417.00 295.00 32.50 0.50 14.00 242.00 464.00 1031.50 1683.82 a 8492.32
2011 1870.13 e 1502.50 1392.50 677.50 342.00 64.00 0.00 2.50 210.00 448.00 952.50 1269.00 8730.63
2012 1402.00 1252.00 748.00 538.50 202.50 32.50 0.00 36.50 211.50 641.00 993.50 1519.50 7577.50
2013 1630.00 1529.50 1496.50 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 4656.00
Period of Record Statistics
MEAN 1682.32 1365.64 1123.10 596.49 257.86 55.32 10.04 23.55 178.35 516.08 995.75 1499.32 8357.78
S.D. 218.33 195.05 180.69 121.01 88.05 40.18 13.75 23.00 62.64 118.62 136.04 210.13 628.94
SKEW -0.14 -0.31 0.00 0.16 0.14 1.06 2.05 1.74 0.74 0.78 0.11 0.17 0.20
MAX 2133.00 1729.00 1516.50 895.00 467.58 158.50 60.00 134.00 399.50 962.00 1347.50 1977.50 9782.19
MIN 1199.00 936.00 748.00 334.00 45.00 0.00 0.00 0.00 58.50 201.00 642.50 1064.85 7066.50
NO YRS 78 81 81 79 77 81 83 84 82 82 80 80 66