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 1706.00 1387.00 1242.50 784.00 471.50 38.28 a 12.00 85.25 a 272.59 a 150.50 r 656.00 n 1474.50 7473.61
1894 1453.00 1008.50 g 920.50 592.50 399.50 63.50 25.50 70.50 206.00 559.50 1083.50 1151.00 6525.00
1895 1597.10 e 0.00 z 1173.50 0.00 z 324.00 55.50 64.00 60.00 191.50 770.00 1001.79 b 1283.00 6520.38
1896 1431.00 1283.50 1260.50 571.50 162.50 55.50 39.50 72.00 336.00 682.00 a 843.50 g 1216.00 7110.00
1897 1410.00 1177.00 1170.50 663.62 a 412.50 207.78 c 10.33 a 114.50 152.00 476.00 1030.50 1435.50 8260.23
1898 1321.50 1235.50 983.50 667.00 307.50 61.50 28.42 a 56.00 167.50 635.50 974.00 1509.00 7946.92
1899 1645.50 1570.00 1429.00 592.50 332.00 79.00 19.50 25.00 337.50 456.00 766.50 1393.00 8645.50
1900 1365.50 1518.22 a 1302.00 561.00 273.00 89.50 23.77 a 1.50 162.00 282.50 1041.50 1315.50 7935.99
1901 1488.00 1464.00 1196.00 555.00 305.00 81.00 10.00 38.50 245.50 490.83 a 0.00 z 0.00 z 5873.83
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 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 1063.30 a 545.50 470.00 96.50 46.50 47.50 154.50 836.00 1038.00 1510.50 5808.30
1926 1546.50 1303.50 1329.00 784.50 295.00 185.50 29.50 31.50 287.50 651.52 a 1137.00 1563.43 a 9144.45
1927 1684.50 1192.00 945.50 684.00 427.50 171.50 49.50 126.00 218.50 479.50 979.50 1631.50 8589.50
1928 1491.50 1409.00 1135.00 880.00 287.00 175.50 27.00 55.00 306.00 515.50 883.97 a 1248.50 8413.96
1929 1928.50 1630.50 1002.50 627.00 462.50 140.00 42.50 78.50 262.00 555.00 1065.50 1418.00 9212.50
1930 1771.13 a 1214.50 1107.00 623.50 309.50 70.86 a 28.00 36.50 170.50 576.50 876.21 a 1359.50 8143.70
1931 1366.50 1032.37 a 1076.00 601.50 381.82 a 64.00 21.00 75.50 106.50 400.50 727.50 1113.00 6966.19
1932 1316.50 1368.00 1303.50 741.00 328.50 30.00 27.00 30.50 217.50 619.48 a 1088.00 1421.00 8490.98
1933 1276.00 1408.00 1164.50 696.00 282.50 35.00 11.00 53.00 101.50 615.19 b 1067.50 1508.00 8218.19
1934 1348.00 1487.50 1242.50 723.00 191.17 a 39.50 20.50 127.50 190.00 458.50 778.50 1461.50 8068.17
1935 1662.12 a 1246.50 1035.00 644.50 385.50 0.00 z 0.00 57.00 212.00 538.37 a 1003.00 1378.00 8161.98
1936 1648.50 1774.50 1078.50 733.45 a 169.50 100.50 3.00 32.00 145.50 609.50 1025.00 1284.00 8603.95
1937 1610.50 1286.00 662.50 o 619.00 278.50 68.50 5.50 8.50 220.00 647.00 985.50 1429.00 7158.00
1938 1540.50 1163.50 911.00 569.00 288.00 70.50 11.00 13.50 193.50 359.50 852.00 1318.00 7290.00
1939 1319.00 1374.69 b 1105.50 673.00 144.00 34.50 0.00 16.50 161.00 513.50 883.00 1090.50 7315.19
1940 1617.50 1213.00 1214.00 700.00 355.50 75.00 26.00 0.00 z 165.50 457.50 914.42 d 1297.00 8035.42
1941 1408.95 a 1309.50 1225.50 443.50 174.50 60.50 8.50 27.50 132.00 472.75 a 821.50 1108.50 7193.20
1942 1430.50 1259.50 958.93 a 400.50 269.00 56.00 22.50 22.45 b 244.00 473.00 916.50 1445.63 a 7498.52
1943 1579.50 1282.81 a 1248.78 a 680.00 295.00 57.93 a 3.00 12.50 306.50 517.50 1031.00 1302.50 8317.03
1944 1191.50 1247.00 1208.00 711.00 176.00 32.00 2.50 30.00 158.00 218.00 q 126.50 y 922.00 k 4756.00
1945 1591.00 1294.50 766.00 562.00 379.75 a 150.50 18.00 22.00 143.50 i 603.00 970.50 1499.50 7856.75
1946 1402.50 1309.50 768.50 550.00 303.00 111.21 a 25.66 b 100.23 a 243.21 b 384.29 b 857.50 1326.50 7382.10
1947 1406.50 1338.00 1109.00 707.07 a 420.50 130.38 d 1.00 10.00 207.93 a 315.68 a 1069.50 1381.00 8096.57
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 71.00 15.00 38.00 157.50 559.50 822.50 1372.00 3035.50
1949 1450.69 d 1312.50 1130.50 597.86 b 266.00 29.50 1.00 23.00 230.00 367.00 905.00 1313.50 7626.54
1950 1549.00 1301.00 1198.50 845.00 281.00 71.50 28.00 83.50 171.00 368.50 1040.50 1511.50 8449.00
1951 1588.50 1277.50 1158.00 635.50 122.50 82.00 15.00 42.50 244.50 486.18 a 1150.86 a 1418.00 8221.05
1952 1489.50 1187.00 1132.50 488.00 275.50 22.76 a 8.50 17.50 198.50 663.40 a 834.50 1197.50 7515.16
1953 1318.50 1271.00 1034.50 678.50 262.50 26.00 11.50 6.00 167.00 342.50 731.00 1223.00 7072.00
1954 1515.50 960.81 a 1102.00 548.00 427.28 a 48.50 6.72 a 29.50 183.00 508.00 832.24 a 1270.00 7431.56
1955 1491.00 1307.00 1155.27 a 407.00 173.00 33.00 1.07 b 10.00 148.50 443.00 1038.50 1471.50 7678.84
1956 1418.00 1333.00 1212.50 702.50 337.00 52.76 a 14.50 34.58 e 228.00 308.00 880.86 a 1268.42 a 7790.12
1957 1706.55 a 1203.00 1029.72 a 573.50 310.00 a 58.00 0.00 25.00 211.55 a 550.00 938.50 1274.00 7879.82
1958 1355.00 1359.00 1009.00 586.00 291.50 133.00 9.50 27.00 151.50 434.00 866.00 1548.97 a 7770.47
1959 1697.50 1428.50 1167.67 a 610.00 175.50 30.50 20.50 0.00 i 149.50 626.41 b 1150.86 a 1148.50 8205.44
1960 1379.50 1259.50 1319.50 574.50 309.00 66.00 20.67 a 13.50 175.00 500.50 800.50 1403.00 7821.17
1961 1498.00 1092.00 960.50 684.50 338.00 54.50 7.00 6.41 b 176.38 a 435.50 444.50 n 1409.43 b 6662.22
1962 1638.00 1380.00 1127.00 649.00 191.50 77.50 23.50 31.50 254.00 460.00 896.00 1358.50 8086.50
1963 1817.00 1467.00 1039.50 538.50 337.00 55.50 11.00 51.00 153.50 243.00 745.71 b 1553.00 8011.71
1964 1342.50 1187.00 1116.50 564.00 161.50 89.50 3.50 92.50 231.50 548.00 795.50 1465.50 7597.50
1965 1558.50 1359.00 887.00 g 727.00 185.50 88.50 27.00 57.00 271.00 483.50 894.00 1120.50 6771.50
1966 1691.00 1223.50 957.50 687.00 415.00 65.50 7.50 49.50 219.50 510.50 908.50 1331.50 8066.50
1967 1405.00 1449.00 1104.00 604.00 437.50 30.00 37.00 76.50 205.00 540.00 1005.00 1304.00 8197.00
1968 1513.00 1397.00 836.50 555.00 335.50 75.00 28.00 67.00 136.00 440.00 907.00 1350.50 7640.50
1969 1551.50 1220.50 1194.02 a 548.50 275.00 206.00 28.50 8.50 203.00 581.50 955.50 1300.50 8073.02
1970 1694.50 1348.50 1147.50 573.00 294.00 57.50 0.00 z 0.00 z 0.00 z 389.05 a 904.29 b 1299.50 7707.84
1971 1650.00 1293.50 1153.50 599.00 323.00 52.50 48.00 81.50 186.50 318.50 888.50 1266.50 7861.00
1972 1628.50 1456.50 1252.00 768.50 205.00 104.00 56.00 72.00 258.00 660.00 978.50 1530.50 8969.50
1973 1433.00 1219.50 842.00 697.00 429.50 29.00 7.00 33.00 270.00 405.50 983.50 1433.00 7782.00
1974 1543.50 1384.50 1156.00 589.00 396.50 131.50 10.50 44.00 306.00 552.50 886.00 1261.18 a 8261.18
1975 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 300.50 446.18 c 766.50 1356.50 2869.68
1976 1626.50 1168.50 1081.50 527.50 364.00 30.00 6.00 59.50 263.50 699.50 1159.00 1703.00 8688.50
1977 1894.50 1253.00 890.50 470.00 120.00 116.50 11.00 86.00 177.00 553.50 935.50 1467.50 7975.00
1978 1653.00 1489.00 1194.50 698.00 250.00 113.08 d 49.37 d 37.95 b 158.57 b 555.00 971.50 1504.50 8674.47
1979 1812.00 1546.00 1118.14 b 715.50 368.00 85.00 19.12 a 53.50 180.50 583.50 973.97 a 1181.50 8636.72
1980 1506.00 1382.00 1178.50 539.50 216.00 94.50 5.68 a 14.50 201.21 a 670.00 915.00 a 1389.66 b 8112.55
1981 1539.50 1177.75 d 911.50 528.00 308.00 35.00 24.00 26.00 230.69 a 623.00 866.38 a 1369.00 7638.82
1982 1815.50 1346.00 1128.50 739.00 126.50 157.50 3.50 64.00 233.00 458.00 940.00 1134.50 8146.00
1983 1339.50 1096.50 1006.00 724.00 467.50 103.50 14.00 7.50 225.50 533.50 878.00 1759.00 8154.50
1984 1677.00 1114.00 1267.50 593.00 424.00 35.50 22.00 23.00 257.50 466.50 956.00 1354.70 a 8190.70
1985 1649.00 1400.00 964.50 547.50 177.50 132.00 14.00 50.00 241.00 583.00 1090.00 1753.50 8602.00
1986 1584.50 1382.50 1063.50 500.50 241.00 89.00 15.50 87.50 206.50 572.50 1098.50 1295.50 8137.00
1987 1399.50 1133.00 951.50 497.50 264.00 46.00 23.50 62.00 173.50 729.50 857.50 1218.50 7356.00
1988 1734.50 1516.50 1091.50 637.50 212.50 85.50 10.50 44.00 187.50 723.50 878.50 1436.50 8558.50
1989 1407.00 1482.00 1300.50 701.00 359.00 123.50 19.00 35.00 244.50 510.50 1074.00 1759.00 9015.00
1990 1268.00 1293.50 997.00 556.00 415.00 84.00 41.00 51.50 184.00 621.00 833.50 1449.00 7793.50
1991 1690.50 1233.00 1043.00 529.00 257.00 40.50 35.50 35.00 296.00 593.50 1113.50 1385.50 8252.00
1992 1368.00 1188.00 1116.00 726.00 284.00 134.00 68.00 104.50 268.50 603.50 1040.00 1372.00 8272.50
1993 1573.50 1356.00 1099.00 762.00 308.00 128.50 5.00 31.50 348.50 633.00 1006.00 1303.50 8554.50
1994 1907.00 1507.50 1035.00 652.50 296.50 63.50 36.50 80.50 158.00 490.50 835.00 1194.00 8256.50
1995 1447.50 1294.00 1013.50 793.00 335.50 61.50 24.00 1.50 278.50 534.00 1196.00 1543.00 8522.00
1996 1699.50 1449.50 1305.00 768.50 431.50 90.00 39.00 25.00 223.00 579.50 1140.50 1426.00 9177.00
1997 1635.00 1245.00 1149.50 689.00 501.50 55.00 52.00 104.50 189.50 569.50 1037.50 1195.00 8423.00
1998 1401.00 1002.00 1030.00 544.00 158.50 139.00 12.00 8.00 112.00 505.00 825.50 1231.00 6968.00
1999 1668.50 1101.50 1012.00 554.50 225.50 104.50 3.00 42.50 265.00 618.00 757.00 1348.50 7700.50
2000 1584.00 1229.50 826.00 665.50 270.00 102.50 33.50 28.50 246.00 464.50 956.50 1696.50 8103.00
2001 1395.50 1383.50 1147.00 540.50 240.00 112.00 33.50 11.50 241.00 593.00 691.00 1159.00 7547.50
2002 1255.00 1077.50 1222.00 655.00 452.50 75.50 10.50 18.00 146.50 710.00 994.00 1255.00 7871.50
2003 1608.00 1477.00 1126.50 715.00 373.50 107.50 27.50 15.00 229.50 600.50 951.50 1265.50 8497.00
2004 1707.00 1333.50 1003.00 628.00 393.00 126.00 46.50 132.50 103.00 544.00 851.00 1392.50 8260.00
2005 1621.50 1160.50 1241.00 559.00 385.50 25.50 22.50 22.00 127.00 480.00 931.50 1452.50 8028.50
2006 1162.00 1339.00 1032.50 480.50 297.50 74.00 9.50 28.50 257.50 694.00 864.50 1180.50 7420.00
2007 1377.00 1482.50 994.50 665.00 236.00 51.00 28.50 37.50 157.50 404.00 969.00 1480.50 7883.00
2008 1555.00 1520.50 1261.50 633.50 400.00 68.50 10.00 35.50 152.00 552.00 942.50 1628.00 8759.00
2009 1829.00 1257.00 1134.00 660.50 313.50 116.00 54.00 69.50 127.50 703.00 746.50 1448.00 8458.50
2010 1486.50 1212.00 865.50 459.50 265.00 65.50 2.00 16.00 263.00 488.50 904.00 1434.50 7462.00
2011 1608.50 1309.50 1172.00 719.00 336.50 91.50 1.50 15.00 257.50 467.00 851.50 1197.00 8026.50
2012 1369.00 1096.50 651.50 589.00 168.00 50.00 0.00 28.00 249.50 365.50 k 0.00 z 0.00 z 4201.50
Period of Record Statistics
MEAN 1535.46 1309.70 1095.02 626.38 303.78 81.48 20.43 44.62 209.70 530.13 938.54 1372.30 8071.60
S.D. 163.49 142.20 140.01 94.81 92.74 41.82 15.87 30.93 55.93 112.20 112.96 150.26 508.82
SKEW 0.14 0.24 -0.51 0.06 -0.03 0.92 0.86 0.90 0.26 -0.05 0.10 0.45 0.01
MAX 1928.50 1774.50 1429.00 880.00 501.50 207.78 68.00 132.50 348.50 836.00 1196.00 1759.00 9212.50
MIN 1162.00 960.81 651.50 400.50 120.00 22.76 0.00 1.50 101.50 243.00 691.00 1090.50 6966.19
NO YRS 94 92 93 94 95 95 95 93 95 94 91 94 79