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 0.00 z 0.00 z 363.98 b 27.69 d 4.98 c 59.50 201.50 311.50 r 1009.04 d 1537.00 3203.70
1894 1728.50 1445.00 865.00 491.38 a 256.27 a 28.00 4.00 10.52 c 152.59 a 471.95 b 1043.00 1192.00 7688.20
1895 1759.52 b 1482.50 1062.50 342.00 245.50 60.50 25.00 f 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4952.52
1896 0.00 z 1122.50 1202.00 486.00 158.00 57.50 19.50 37.00 286.00 667.00 1333.50 1228.50 6597.50
1897 1018.00 m 1313.00 1228.93 c 608.00 288.50 139.00 7.75 a 75.43 a 81.00 406.00 1026.96 b 1563.00 6737.58
1898 1369.50 1225.54 b 792.50 f 571.50 287.00 33.00 10.50 23.00 138.50 581.80 c 1111.55 a 1577.12 c 6929.02
1899 1501.90 b 1654.59 a 1479.45 b 585.00 293.00 30.00 13.50 6.50 221.50 388.00 723.00 1420.00 8316.44
1900 1311.50 1518.00 1113.50 430.50 155.00 24.50 8.50 2.50 187.00 234.50 1060.00 1252.50 7298.00
1901 1404.09 b 1350.00 994.30 d 409.50 f 213.79 b 53.00 0.00 0.00 a 193.50 401.34 c 943.00 1530.48 d 7083.50
1902 1425.47 b 1393.54 b 933.32 c 586.00 171.50 106.00 7.00 30.50 236.90 a 415.50 882.41 a 1517.34 c 7705.48
1903 1432.20 a 1376.00 1005.36 b 580.50 220.50 103.50 20.50 79.57 a 267.00 499.88 c 1169.48 a 1614.87 d 8369.36
1904 1788.18 a 1650.93 a 1073.24 b 735.50 271.50 86.00 33.00 94.00 188.28 a 475.69 b 780.00 b 1452.50 8628.82
1905 1809.07 c 1613.50 905.64 c 656.00 369.50 95.00 34.50 0.00 107.50 618.97 a 893.00 1266.72 b 8369.40
1906 1371.50 1296.81 a 1308.72 a 500.50 279.00 100.00 39.00 31.50 118.50 548.91 b 1008.10 a 1353.00 7955.55
1907 1702.79 c 1268.50 993.50 876.50 534.00 120.50 13.00 43.00 229.00 580.22 a 951.72 a 1266.87 a 8579.59
1908 1395.52 a 1357.50 1052.00 554.00 310.00 120.50 41.00 49.00 114.50 562.81 b 884.50 1355.73 a 7797.06
1909 1568.00 1321.00 1125.62 b 806.00 353.00 73.00 22.50 15.00 194.46 b 592.10 a 904.66 a 1699.00 8674.34
1910 1608.38 a 1543.00 611.50 483.50 407.00 121.50 12.00 55.00 207.50 390.00 1032.32 b 1405.50 7877.20
1911 1652.50 1235.50 908.00 647.50 214.50 9.50 27.50 60.00 166.50 660.82 a 1243.33 c 1326.28 a 8151.93
1912 2059.36 b 1459.84 a 1298.50 551.90 a 245.50 146.90 a 24.00 20.50 303.00 510.47 a 858.62 a 1255.50 a 8734.08
1913 1560.00 1421.00 1203.66 b 574.00 330.00 60.00 8.00 6.20 a 206.00 603.47 a 733.39 b 1125.30 a 7831.01
1914 1320.00 1514.50 1064.00 635.00 249.50 25.50 9.50 34.00 140.69 a 346.50 830.36 b 1672.00 7841.55
1915 1599.08 a 1157.50 1223.50 350.50 402.00 123.50 42.50 103.50 193.00 466.00 972.60 e 1345.50 7979.18
1916 1771.50 883.00 l 1135.50 0.00 z 0.00 z 0.00 z 0.00 z 56.83 d 221.00 570.00 974.00 1594.43 a 6323.27
1917 1709.00 1582.00 1156.50 696.50 424.00 114.50 13.95 a 47.00 184.50 792.50 787.50 1775.50 9283.45
1918 1902.50 1345.50 813.50 682.00 195.82 a 56.00 27.00 9.00 288.00 441.75 a 869.46 b 774.50 k 6630.53
1919 1259.50 1364.74 a 861.00 f 628.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3252.24
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 330.27 e 111.00 0.00 51.50 136.50 567.00 1072.50 1397.50 3666.27
1936 1861.00 1940.00 992.00 671.00 138.50 63.00 0.00 1.00 100.50 561.00 998.00 1279.78 a 8605.78
1937 1903.00 1400.50 1104.00 630.00 188.00 93.00 4.00 1.03 a 167.50 599.50 1029.50 1488.00 8608.03
1938 1550.00 1285.00 856.50 533.50 316.50 54.50 0.00 1.50 97.50 280.50 1003.50 1328.00 7307.00
1939 1294.00 1492.00 1017.00 611.50 101.00 39.50 0.00 31.50 122.00 510.00 851.50 1118.00 7188.00
1940 1866.20 a 1318.50 1177.50 632.00 279.50 27.00 16.50 51.00 119.00 299.50 1127.00 1290.50 8204.20
1941 1449.50 1323.50 1087.00 455.00 138.50 64.50 23.50 21.50 145.00 458.00 902.00 1184.50 7252.50
1942 1432.50 1255.00 956.00 409.50 343.00 61.50 8.50 16.00 283.00 492.50 896.50 1510.00 7664.00
1943 1741.00 1168.50 1174.00 532.00 368.00 87.00 1.50 18.50 247.50 497.00 1053.00 1278.00 8166.00
1944 1153.50 1251.00 1232.00 715.50 181.00 69.00 7.50 42.50 141.00 439.00 844.00 1396.50 7472.50
1945 1449.00 1214.50 815.00 622.50 411.00 168.50 24.50 26.50 217.50 473.50 973.50 1606.50 8002.50
1946 1530.50 1187.00 685.50 423.50 355.00 87.50 3.00 55.00 176.00 453.00 982.00 1272.00 7210.00
1947 1340.50 1441.00 1094.50 679.50 364.50 109.50 17.00 4.00 156.00 218.00 1088.50 1389.50 7902.50
1948 0.00 z 0.00 z 0.00 z 400.50 272.00 45.50 4.50 18.50 96.00 467.07 a 934.00 1413.00 3651.07
1949 1629.00 1407.50 1053.00 533.50 147.00 24.00 2.50 17.00 233.00 411.50 768.00 1343.00 7569.00
1950 1808.50 1291.50 1211.58 a 805.50 335.00 86.00 33.07 a 68.50 152.59 a 400.00 1075.00 1553.50 8820.74
1951 1639.50 1164.00 1411.00 728.50 208.50 138.50 32.50 31.50 285.00 554.00 1168.00 1548.45 a 8909.45
1952 1612.50 1140.84 a 1198.50 543.00 269.00 24.00 14.98 a 19.50 145.50 613.50 901.00 1333.50 7815.82
1953 1510.50 1205.50 984.00 704.48 a 240.00 33.00 10.00 4.50 156.00 316.50 801.00 1324.50 7289.98
1954 1623.50 843.00 1116.00 465.50 400.00 53.00 0.50 6.00 130.00 539.00 766.50 1252.00 7195.00
1955 1443.00 1398.50 1103.00 327.50 122.50 74.00 0.00 6.50 151.50 413.50 1141.50 1606.00 7787.50
1956 1647.00 1490.91 a 1146.50 709.00 225.02 b 18.50 5.50 36.50 185.50 293.00 989.50 1242.00 7988.93
1957 1687.50 1175.00 1063.00 614.50 294.00 58.00 0.00 24.00 198.00 535.50 937.00 1115.50 7702.00
1958 1258.00 1325.50 1025.50 520.00 152.50 93.50 9.00 17.50 104.00 378.00 860.00 1475.50 7219.00
1959 1637.50 1413.50 955.50 512.00 185.50 21.50 10.50 2.00 175.00 605.50 1204.50 1083.00 7806.00
1960 1524.00 1385.50 1458.50 529.00 209.00 35.50 9.50 2.00 163.50 421.00 817.00 1375.50 7930.00
1961 1569.50 1160.50 938.00 699.00 315.50 55.50 2.00 10.00 205.50 414.00 939.50 1506.00 7815.00
1962 1664.50 1327.00 1266.00 592.00 128.00 45.50 17.50 8.00 213.50 377.00 762.00 1299.00 7700.00
1963 1793.50 1291.50 844.50 434.50 218.50 13.50 0.00 21.00 80.00 180.50 759.50 1616.50 7253.50
1964 1270.50 1112.50 1137.50 488.00 129.50 40.50 0.00 54.50 173.00 444.00 842.00 1511.00 7203.00
1965 1584.50 1394.50 1348.50 574.50 130.50 10.00 2.00 32.50 320.50 383.50 916.00 1104.00 7801.00
1966 1762.00 1298.50 790.50 671.50 298.00 41.50 1.00 50.50 194.50 495.50 985.00 1386.50 7975.00
1967 1478.50 1343.00 854.50 523.50 389.50 35.00 31.00 39.50 136.50 503.50 942.00 1288.50 7565.00
1968 1465.78 a 1311.00 724.50 437.00 346.50 39.50 13.00 19.50 145.00 428.00 911.00 1442.00 7282.78
1969 1713.78 a 1229.50 1368.00 482.50 195.00 123.00 2.50 2.50 106.50 575.00 890.50 1374.00 8062.78
1970 0.00 z 1249.63 a 1184.00 556.00 190.50 26.50 9.50 6.50 174.50 524.50 915.50 1420.50 6257.63
1971 1683.00 1237.00 1037.00 0.00 z 247.50 8.50 31.00 21.50 162.50 340.50 883.00 1401.00 7052.50
1972 1702.50 1499.00 995.50 582.50 211.50 36.50 0.00 z 39.00 168.50 552.00 945.50 1541.00 8273.50
1973 1430.50 1163.50 751.50 548.00 252.50 21.00 2.50 2.50 170.00 288.00 868.50 1450.00 6948.50
1974 1576.50 1119.50 917.50 466.50 273.50 63.00 2.00 34.50 228.00 386.00 880.00 1257.00 7204.00
1975 1489.50 1348.15 a 1229.00 716.00 135.50 54.50 10.50 6.50 257.50 387.50 891.00 1303.00 7828.65
1976 1491.21 b 1005.00 939.00 394.50 254.50 0.00 z 5.00 11.00 152.50 627.50 1105.50 1465.27 a 7450.97
1977 1868.50 1078.00 900.50 415.50 110.00 39.50 8.00 0.00 z 145.56 c 521.00 982.50 1478.50 7547.56
1978 1871.50 1539.50 1087.50 626.00 249.00 70.00 0.00 z 35.00 77.50 460.50 1004.50 1563.50 8584.50
1979 1957.00 1591.00 1167.00 637.50 320.50 38.00 0.50 42.50 110.00 493.50 994.50 1144.42 a 8496.42
1980 1437.50 1372.00 0.00 z 486.00 208.50 17.50 1.00 8.00 104.00 563.50 794.50 1338.17 a 6330.67
1981 1305.21 b 1123.50 862.12 b 347.07 a 251.50 22.76 a 21.00 25.50 133.50 563.00 787.50 1522.00 6964.66
1982 1994.50 1412.00 1105.50 728.50 215.00 120.50 3.50 55.00 208.50 531.50 1101.00 1378.93 d 8854.43
1983 1486.50 1179.50 1087.50 773.50 399.00 90.00 0.50 0.00 212.50 562.50 998.50 1356.50 i 6790.00
1984 1643.50 1170.00 1359.00 677.50 365.00 36.00 13.00 24.00 312.69 d 506.85 a 1001.79 b 1433.48 b 8542.81
1985 1329.50 g 841.50 h 888.00 499.50 160.00 126.00 15.50 85.00 311.79 b 610.50 1300.86 a 1826.50 5823.65
1986 1495.50 1423.50 981.50 542.50 250.00 27.00 5.00 75.50 176.00 524.50 1168.00 1301.50 7970.50
1987 1368.00 936.00 926.50 433.50 129.00 32.50 7.50 6.50 n 158.00 686.00 823.50 1289.00 6789.50
1988 1811.00 1590.00 983.00 644.50 103.00 3.50 11.00 34.50 148.50 660.50 989.00 1476.00 8454.50
1989 1319.50 1599.00 1200.00 601.00 264.50 74.00 2.00 12.50 204.00 472.50 1125.50 1735.50 8610.00
1990 1222.00 1215.50 979.00 641.00 337.50 65.50 20.50 24.00 150.00 579.50 931.50 1566.50 7732.50
1991 1741.00 1114.00 1003.00 530.00 243.50 23.50 18.50 23.00 232.00 605.50 1295.00 1360.50 8189.50
1992 1322.50 1125.00 984.00 768.50 235.00 80.00 94.00 100.50 227.00 569.00 1095.50 1475.00 8076.00
1993 1702.50 1478.50 1280.50 725.50 330.00 134.50 9.00 31.00 338.50 608.00 1129.00 1456.50 9223.50
1994 1916.50 1587.50 990.00 647.00 227.50 26.50 24.00 55.50 151.50 465.00 873.00 1368.00 8332.00
1995 1583.50 1264.00 1060.50 784.00 357.00 71.50 20.50 8.00 268.00 583.50 1192.00 1375.00 8567.50
1996 1755.50 1351.00 1284.50 751.50 425.00 55.50 15.00 5.50 262.50 538.50 1260.50 1694.50 9399.50
1997 1814.50 1351.50 1148.50 752.50 461.00 4.00 27.00 48.50 134.50 499.50 1163.50 1268.50 8673.50
1998 1499.50 980.00 a 1203.50 573.50 114.50 124.00 3.50 6.50 77.00 461.00 883.00 1248.50 7174.50
1999 1690.00 1077.00 994.50 589.50 202.00 93.50 5.50 8.78 a 221.00 547.50 716.90 a 1279.50 7425.68
2000 1120.50 j 1105.50 811.00 611.50 193.50 86.50 18.50 14.00 177.50 429.50 1200.50 1858.00 6506.00
2001 1518.50 1556.00 1270.50 578.00 243.00 69.00 5.00 24.50 216.43 b 537.00 619.00 1250.00 7886.93
2002 1311.00 1172.00 1328.50 609.00 399.50 31.00 6.00 29.50 169.00 111.00 x 1042.50 1237.00 7335.00
2003 1555.00 1405.00 1073.50 557.50 298.50 76.00 4.00 10.50 231.00 480.50 1090.50 1393.00 8175.00
2004 1697.50 1441.00 900.00 537.00 306.50 110.00 83.00 92.50 102.00 483.50 832.00 869.50 l 6585.00
2005 1621.50 1084.50 0.00 z 474.00 321.00 15.00 11.50 24.00 107.00 478.50 884.50 1560.50 6582.00
2006 1174.50 1293.50 1079.00 478.50 264.00 31.00 n 0.00 g 12.00 f 271.50 34.50 y 0.00 z 0.00 z 4561.00
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 0.00 z 0.00 z 0.00 z 0.00
2008 1734.00 1606.48 e 1204.00 715.50 319.50 25.50 3.50 16.50 176.00 531.00 980.00 1671.33 b 8983.31
2009 1773.00 1239.50 1057.50 643.00 0.00 z 0.00 z 0.00 z 50.00 93.00 768.00 735.50 1600.24 b 7959.74
2010 1344.50 f 1460.85 b 935.37 e 386.00 283.00 23.50 0.00 7.00 178.00 440.00 962.50 1601.15 a 6277.36
2011 1772.50 1396.50 1164.05 a 660.00 a 284.00 49.62 d 0.00 11.50 252.41 a 455.50 933.10 a 1282.00 8261.18
2012 1376.92 a 1211.50 582.91 c 452.00 145.50 38.57 b 0.00 a 37.50 203.57 b 655.50 908.50 1341.27 a 6953.74
2013 1556.72 a 1288.00 1243.74 b 38.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4088.46
Period of Record Statistics
MEAN 1585.14 1324.38 1062.52 579.90 262.83 62.32 13.08 29.40 181.79 492.95 964.82 1410.92 7977.42
S.D. 199.65 177.34 177.86 117.16 91.05 38.64 15.42 24.92 60.59 110.88 143.80 164.73 589.92
SKEW 0.00 0.23 -0.15 0.01 0.27 0.59 2.68 1.05 0.44 -0.24 0.34 0.37 0.28
MAX 2059.36 1940.00 1479.45 876.50 534.00 168.50 94.00 103.50 338.50 792.50 1333.50 1858.00 9399.50
MIN 1153.50 843.00 582.91 327.50 101.00 3.50 0.00 0.00 77.00 180.50 619.00 1083.00 6948.50
NO YRS 96 100 98 99 101 99 97 99 102 99 101 98 76