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
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 228.50 628.00 898.00 1619.50 3374.00
1923 1679.50 1673.78 a 1533.00 879.00 403.50 77.00 20.50 162.50 270.00 701.50 950.56 c 1212.00 9562.83
1924 1883.00 1391.00 1252.00 782.50 618.50 238.00 129.50 140.50 423.50 525.97 a 0.00 z 0.00 z 7384.47
1925 0.00 z 529.50 r 1166.50 642.50 523.00 148.50 81.50 i 74.50 261.50 886.00 1076.50 1508.00 6287.00
1926 1561.50 1344.00 1473.00 938.50 373.00 244.50 86.50 107.00 377.00 754.00 1213.50 1583.00 10055.50
1927 1672.00 1299.00 1029.50 720.50 524.50 243.50 124.50 230.50 246.50 567.30 a 1138.00 1647.50 9443.30
1928 1531.00 1479.00 a 1321.50 937.50 374.00 263.50 66.00 121.00 432.50 594.00 975.50 1324.50 9420.00
1929 1934.00 1641.50 1153.00 685.00 511.00 215.50 79.50 131.00 313.00 630.00 1124.00 1490.50 9908.00
1930 1824.00 1286.00 1178.50 713.00 369.00 135.50 71.00 87.00 292.00 653.00 936.50 1409.98 a 8955.48
1931 1368.00 1146.50 1195.00 709.50 454.00 113.00 52.50 156.00 177.50 499.50 815.00 1201.50 7888.00
1932 1366.50 1385.00 1436.00 818.50 406.00 96.00 62.50 91.50 350.50 741.50 1184.50 1551.50 9490.00
1933 1437.00 1543.50 1332.00 834.00 357.00 56.00 54.00 0.00 z 184.50 765.00 1213.00 1643.50 9419.50
1934 1438.50 1660.50 1433.50 869.50 249.00 112.00 63.50 216.00 406.50 606.50 993.00 1593.00 9641.50
1935 1702.50 1346.00 1203.50 847.00 532.00 274.00 18.00 128.50 386.00 693.00 1175.00 1511.00 9816.50
1936 1733.50 1820.50 1254.50 960.50 326.50 223.50 44.50 130.00 284.50 821.00 1233.00 1408.50 10240.50
1937 1732.50 1399.50 1366.00 848.50 413.00 157.50 63.50 46.00 360.00 807.50 1145.50 1564.47 a 9903.97
1938 1677.50 1324.50 1099.50 767.50 428.00 201.00 58.50 85.00 309.50 494.50 1022.00 1436.00 8903.50
1939 1488.50 1517.00 1285.00 852.00 320.00 147.00 41.00 69.50 292.50 679.00 962.50 1221.00 8875.00
1940 1700.00 1329.50 1420.50 891.00 507.50 187.00 83.00 136.00 248.50 581.50 1093.00 1388.50 9566.00
1941 1533.00 1353.00 1327.00 566.00 267.50 120.00 77.50 116.00 232.00 613.50 983.00 1272.50 8461.00
1942 1498.00 1378.50 1102.00 539.50 435.50 137.50 84.00 85.50 358.50 577.00 1056.00 1544.50 8796.50
1943 1693.00 1344.50 1410.00 841.50 407.50 113.00 11.50 67.00 377.50 578.00 1132.00 1390.00 9365.50
1944 1245.50 1346.00 1324.00 809.00 265.00 121.00 29.50 70.50 257.00 566.00 896.00 1483.00 8412.50
1945 1709.00 1332.50 873.00 736.50 564.00 245.00 100.00 82.00 341.50 658.50 1091.00 1544.50 9277.50
1946 1518.50 1446.50 847.00 660.50 437.50 173.00 43.50 130.00 291.00 499.00 1006.00 1442.00 8494.50
1947 1477.50 1408.00 1262.50 871.50 544.50 213.50 70.00 33.00 271.00 322.00 1155.50 1428.00 9057.00
1948 1735.00 1463.50 1266.50 651.50 402.50 140.50 46.00 65.00 178.00 596.50 956.50 1437.00 8938.50
1949 1467.00 1390.00 1260.00 651.50 365.00 65.00 44.50 62.50 348.50 508.92 a 1039.50 1451.12 b 8653.54
1950 1684.50 1375.00 1390.72 b 1021.50 453.50 162.00 112.00 198.00 279.50 495.50 1171.00 1550.00 9893.22
1951 1615.50 1348.50 1281.50 779.50 258.00 201.50 72.50 181.50 374.00 628.50 1240.00 1473.50 9454.50
1952 1521.00 1263.00 1245.00 613.00 396.00 108.50 51.00 91.50 263.50 755.00 952.00 1260.50 8520.00
1953 1432.50 1304.00 1133.05 a 825.50 379.50 100.00 59.00 54.00 292.50 415.50 843.50 1341.50 8180.55
1954 1605.00 1077.50 1279.00 722.50 586.00 106.50 63.50 101.55 b 338.50 621.00 922.50 1366.00 8789.55
1955 1554.00 1340.50 1294.00 507.50 278.50 108.00 13.00 32.50 276.50 545.50 1165.00 1557.50 8672.50
1956 1449.00 1380.00 1286.50 817.50 442.00 116.00 102.00 87.00 371.50 402.50 1018.00 1369.50 8841.50
1957 1776.00 1320.50 1172.50 679.00 406.00 159.00 31.00 107.00 351.21 a 609.50 1046.50 1390.00 9048.21
1958 1427.50 1409.50 1108.00 663.00 441.00 269.00 76.00 116.50 262.00 542.00 974.50 1679.00 8968.00
1959 1758.00 1431.50 1190.00 721.00 280.50 119.50 72.00 33.00 258.50 731.50 1263.00 1213.00 9071.50
1960 1531.00 1353.50 1429.00 720.50 411.00 191.00 81.50 67.00 298.50 584.50 940.50 1519.50 9127.50
1961 1613.00 1178.50 1091.50 818.00 489.00 141.50 68.00 72.00 299.00 523.50 1017.00 1471.50 8782.50
1962 1701.50 1468.00 1134.00 779.50 297.00 151.00 89.50 111.08 a 391.00 553.00 988.00 1482.00 9145.58
1963 1879.00 1621.00 1182.00 674.00 452.00 134.00 58.50 139.50 315.00 364.00 876.50 1632.50 9328.00
1964 1443.50 1428.00 1316.50 721.50 295.50 179.00 58.50 201.50 331.00 670.00 922.00 1586.00 9153.00
1965 1712.00 1525.50 1424.50 822.50 278.00 210.00 140.50 151.00 433.00 587.00 1015.50 1272.07 b 9571.57
1966 1790.50 1353.50 1104.50 861.50 560.00 140.00 45.00 139.00 336.00 674.50 1058.00 1446.50 9509.00
1967 1547.00 1567.50 1214.50 741.50 607.50 153.50 128.50 194.00 338.50 694.00 1148.50 1449.50 9784.50
1968 1661.00 1530.50 1016.50 671.00 483.00 195.00 109.50 154.50 0.00 z 541.00 1024.00 1472.50 8858.50
1969 1584.00 1398.44 a 1367.00 669.50 409.00 349.50 95.50 55.50 313.50 716.50 1058.50 1428.00 9444.94
1970 1833.50 1492.50 1362.50 724.00 412.00 137.00 64.00 86.50 287.50 535.50 1033.50 1481.00 9449.50
1971 1825.50 1461.50 1365.00 787.00 515.00 103.00 137.00 174.50 285.00 392.00 1015.50 1448.50 9509.50
1972 1839.00 1623.00 1388.50 932.00 310.50 191.50 101.00 101.50 349.50 735.50 1044.00 1596.50 10212.50
1973 1500.50 1386.00 926.50 761.50 509.00 120.50 61.50 80.00 333.50 452.00 1018.00 1518.50 8667.50
1974 1694.00 1509.50 1256.50 720.50 516.50 242.00 51.00 108.50 451.00 640.50 988.00 1325.50 9503.50
1975 1598.50 1362.00 1346.00 954.50 282.00 144.00 58.00 115.00 411.50 533.72 a 905.50 1503.50 9214.22
1976 1735.50 1257.50 1247.50 664.00 479.00 73.50 63.00 141.00 365.00 806.00 1253.50 1821.50 9907.00
1977 1963.00 1363.00 1018.50 601.00 170.50 183.00 51.50 222.00 285.00 a 634.00 1005.50 1511.50 9008.50
1978 1730.50 1552.50 1304.00 818.00 347.50 189.50 97.50 76.00 220.50 638.00 1058.50 1643.50 9676.00
1979 1917.00 1647.50 1188.00 853.00 514.00 194.50 67.00 126.00 252.00 721.50 1079.50 1325.50 9885.50
1980 1642.50 1566.00 1329.00 675.00 289.00 188.50 50.50 64.50 317.50 759.00 1003.50 1564.00 9449.00
1981 1668.50 1268.50 1098.00 648.00 471.50 131.50 74.00 75.00 359.50 726.00 909.50 1446.00 8876.00
1982 1948.00 1484.00 1257.50 899.50 226.50 319.50 45.50 176.50 365.50 640.50 1102.00 1324.00 9789.00
1983 1564.00 1203.00 1178.50 878.50 605.00 215.00 35.50 49.00 303.50 695.00 1028.50 1845.50 9601.00
1984 1844.00 1216.00 1476.00 686.00 533.50 106.50 97.00 63.50 414.50 569.00 1089.00 1484.00 9579.00
1985 1735.50 1556.50 1125.50 718.00 363.00 278.00 110.50 167.50 365.50 697.50 1215.00 1832.00 10164.50
1986 1693.00 1511.00 1226.50 624.50 336.00 227.00 82.00 211.50 344.50 709.50 1199.00 1405.50 9570.00
1987 1527.00 1242.00 1106.50 665.50 394.00 118.00 81.00 160.00 329.50 874.00 1004.50 1345.00 8847.00
1988 1818.15 a 1674.00 1336.00 773.00 326.00 163.50 52.50 111.50 341.00 859.50 1017.00 1545.50 10017.65
1989 1538.50 1690.50 1465.00 878.50 465.50 247.00 54.00 122.00 404.00 677.00 1241.00 1906.50 10689.50
1990 1430.00 1461.50 1196.00 717.50 559.50 191.00 135.00 141.00 345.50 771.00 0.00 z 0.00 z 6948.00
1991 0.00 z 0.00 z 1243.00 687.00 322.50 103.50 126.50 114.00 428.00 789.50 1229.50 1506.50 6550.00
1992 1555.00 1395.00 1345.00 882.00 424.00 282.00 255.00 269.00 392.00 743.00 1173.00 1473.50 10188.50
1993 1704.00 1505.00 1266.00 917.00 476.00 251.00 94.50 122.00 523.00 821.00 1219.00 1474.00 10372.50
1994 2051.00 1639.50 1245.50 846.50 470.50 147.00 134.50 202.50 296.50 618.00 989.50 1312.00 9953.00
1995 1576.50 1480.00 1204.50 994.50 488.00 107.00 90.00 52.00 440.00 659.00 1356.50 1664.00 10112.00
1996 1871.00 1669.50 1541.50 992.00 562.50 177.00 168.50 127.50 317.00 716.00 1211.50 1502.50 10856.50
1997 1727.50 1396.50 1377.50 869.50 679.00 130.50 132.00 237.00 326.50 698.00 1146.50 1257.00 9977.50
1998 1514.50 1052.00 1224.00 669.00 276.50 220.00 105.00 69.00 261.00 627.50 954.50 1378.00 8351.00
1999 1801.50 1295.00 1228.00 703.00 345.00 169.50 49.50 147.50 384.50 775.00 876.50 1471.00 9246.00
2000 1738.50 1399.50 1040.50 851.00 394.00 218.00 121.00 135.00 365.69 a 615.50 1037.50 1805.00 9721.19
2001 1500.00 1535.50 1331.00 698.50 370.40 b 195.00 122.00 109.50 384.00 744.50 773.00 1246.00 9009.40
2002 1398.50 1270.50 0.00 z 840.00 594.00 152.00 35.00 100.00 293.00 840.00 1164.50 1374.00 8061.50
2003 1729.50 1656.50 0.00 z 877.00 509.00 229.00 102.00 84.50 315.50 753.00 1087.00 1389.00 8732.00
2004 1856.50 1442.50 1203.50 832.50 536.50 266.50 146.50 272.50 0.00 z 668.50 1017.50 1585.50 9828.50
2005 1768.00 1317.50 1440.50 694.50 517.50 70.50 78.00 132.50 281.00 590.00 1077.00 1493.00 9460.00
2006 1357.50 1499.50 1255.00 646.00 422.00 190.00 49.00 130.50 432.50 840.50 976.00 1327.00 9125.50
2007 1550.50 1598.00 0.00 z 868.00 361.50 137.50 111.00 111.00 311.00 550.00 1108.00 1597.02 a 8303.52
2008 1600.00 1662.50 1471.50 848.00 544.50 177.50 87.50 171.50 358.50 814.50 1129.50 1747.00 10612.50
2009 1993.00 1427.50 1360.00 878.00 531.50 275.00 225.00 208.00 272.00 833.50 876.00 1581.50 10461.00
2010 1556.50 1381.50 1021.00 628.50 360.00 177.50 40.00 79.50 431.50 649.00 1011.00 1541.50 8877.50
2011 1767.50 1405.00 1314.00 871.50 459.00 213.00 44.00 94.50 361.50 643.00 992.00 1425.00 9590.00
2012 1572.50 1311.50 812.50 767.00 340.00 145.50 23.00 157.50 431.79 b 498.00 j 0.00 z 0.00 z 5561.29
Period of Record Statistics
MEAN 1649.17 1427.18 1248.12 774.38 424.34 172.83 79.33 121.48 329.89 647.32 1053.69 1480.58 9391.69
S.D. 164.62 145.44 148.42 110.07 104.54 60.81 41.75 53.89 66.03 119.78 115.45 147.57 603.92
SKEW 0.10 0.11 -0.59 0.00 -0.01 0.43 1.40 0.68 0.09 -0.27 0.13 0.50 0.06
MAX 2051.00 1820.50 1541.50 1021.50 679.00 349.50 255.00 272.50 523.00 886.00 1356.50 1906.50 10856.50
MIN 1245.50 1052.00 812.50 507.50 170.50 56.00 11.50 32.50 177.50 322.00 773.00 1201.50 7888.00
NO YRS 88 88 87 90 90 90 89 89 89 90 88 88 79