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
1897 0.00 z 1351.00 1277.00 623.33 c 283.00 0.00 z 0.00 e 61.40 e 319.00 0.00 z 0.00 z 1611.50 5526.24
1898 1447.59 c 915.00 i 1092.50 690.00 328.50 87.50 28.00 76.50 182.00 706.00 1123.00 1694.00 7455.59
1899 1857.00 1748.50 1574.50 631.00 327.00 53.00 10.00 25.50 285.00 600.00 810.00 0.00 z 7921.50
1900 0.00 z 1646.00 1253.50 465.50 226.00 80.00 32.00 0.00 z 239.50 313.50 1179.50 0.00 z 5435.50
1901 0.00 z 0.00 z 0.00 z 564.50 264.00 122.00 13.50 33.00 268.00 507.50 0.00 z 0.00 z 1772.50
1902 0.00 z 0.00 z 0.00 z 699.31 a 284.68 a 132.50 l 21.24 d 77.50 314.42 d 622.87 d 972.32 b 1696.14 c 4688.49
1903 1718.00 1590.50 909.50 f 681.72 a 297.17 b 168.75 b 40.76 d 123.48 a 292.24 a 593.65 a 1162.76 a 1763.38 a 8432.42
1904 1897.20 a 1867.50 1277.41 b 821.79 b 362.18 a 153.00 55.80 a 118.83 a 283.50 614.00 883.00 1480.00 9814.22
1905 1827.97 a 1560.00 985.28 a 588.50 i 0.00 z 48.50 r 21.00 m 28.00 j 170.89 b 600.33 e 938.40 e 1490.00 7572.87
1906 1517.00 1526.00 1384.84 b 574.50 407.00 118.00 52.50 62.00 141.72 a 634.93 d 1059.00 1605.00 9082.49
1907 1536.00 f 1563.50 1257.50 608.00 l 527.50 f 103.00 k 15.00 f 63.19 e 292.24 a 456.50 g 977.50 1355.98 b 5509.92
1908 1548.00 1343.50 991.50 f 608.50 359.71 b 130.00 44.95 a 12.50 q 45.00 m 556.45 a 942.00 e 1452.35 a 6985.46
1909 1597.05 c 1411.85 b 1165.00 877.22 c 406.00 94.50 25.83 a 24.00 236.00 647.50 923.00 1722.50 9130.46
1910 1659.00 1605.00 763.50 528.00 e 448.31 e 130.00 0.00 z 70.30 c 238.39 b 470.50 1162.50 1514.00 8589.50
1911 1841.83 b 1325.74 e 979.50 702.93 a 277.21 e 39.64 b 69.50 113.00 298.89 c 717.59 d 1384.82 b 1457.00 c 9207.65
1912 2221.00 1612.61 a 1433.75 a 583.50 339.85 d 110.50 h 0.00 z 0.00 z 0.00 z 0.00 z 524.00 o 0.00 z 6190.71
1913 0.00 z 0.00 z 975.50 g 0.00 z 0.00 z 67.50 g 37.89 d 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 37.89
1914 0.00 z 1292.50 g 0.00 z 0.00 z 0.00 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 291.00 670.00 1016.50 1761.50 3739.00
1917 1918.50 1756.50 1246.00 777.50 424.50 192.50 33.00 95.00 246.50 898.00 869.50 1833.00 10290.50
1918 1942.50 1411.50 915.00 713.00 283.00 93.50 31.50 25.50 390.00 579.00 897.00 1250.50 8532.00
1919 1459.50 1453.50 1220.50 685.00 332.00 70.50 4.00 41.50 180.50 761.50 1259.00 1776.00 9243.50
1920 1911.50 1501.50 1188.00 875.50 281.50 100.50 34.50 43.50 138.50 404.50 1104.00 1404.50 8988.00
1921 1478.50 1252.50 1104.00 579.00 291.00 58.00 2.50 g 44.00 187.00 531.00 1258.00 1526.50 8309.50
1922 1767.50 1708.50 1173.50 709.50 187.50 66.00 51.00 31.50 166.00 489.00 861.00 1579.00 8790.00
1923 1610.50 1631.28 c 1456.50 718.50 293.50 52.50 4.59 d 82.84 b 179.00 623.00 869.00 1236.50 8757.72
1924 1887.50 1368.50 1120.50 766.50 585.00 159.50 43.00 91.00 327.50 386.00 1081.50 1829.50 9646.00
1925 1708.50 1337.50 1080.00 502.00 467.00 125.50 50.00 f 22.50 174.00 h 905.00 1076.00 1568.00 8792.00
1926 1651.78 a 1279.50 1300.89 c 763.80 e 0.00 z 170.50 28.50 41.50 347.00 665.50 1189.00 1622.00 9059.98
1927 1738.00 1106.50 f 1068.00 671.00 438.00 158.50 45.00 108.00 228.00 525.50 1157.50 1895.50 8033.00
1928 1629.50 1386.50 1123.00 814.50 231.50 169.50 12.50 54.00 301.00 533.00 898.50 1353.00 8506.50
1929 2064.00 1619.00 1061.50 655.50 461.50 134.50 14.43 b 28.00 312.50 549.50 1131.00 1531.29 b 9562.72
1930 1879.50 1159.00 1085.50 526.00 287.02 b 48.00 18.00 r 7.00 195.50 607.00 926.50 1371.00 8092.02
1931 1286.50 1003.00 1090.50 506.11 c 344.00 47.59 a 13.43 a 50.50 98.00 394.00 816.50 1116.50 6766.63
1932 1466.00 1391.00 1367.00 642.00 263.50 a 7.00 18.50 12.00 199.00 622.00 1092.00 1584.50 8664.50
1933 1437.37 a 1558.50 1121.50 717.00 282.00 19.00 1.55 a 23.50 90.00 648.50 1138.50 1609.00 8646.42
1934 1481.28 a 1389.50 1186.50 662.00 114.18 a 35.00 4.00 71.82 a 246.00 412.30 a 849.83 a 1635.50 8087.91
1935 1823.83 a 1153.00 1054.50 678.00 357.53 a 142.50 0.00 61.00 213.62 a 574.50 1171.50 1528.00 8757.99
1936 1947.50 1972.00 1153.50 806.00 171.50 78.00 0.53 b 26.50 131.50 645.00 1108.00 1413.00 9453.04
1937 1946.80 a 1495.41 a 1262.00 680.00 240.00 91.50 5.00 4.50 202.50 615.35 a 1034.50 1554.50 9132.06
1938 1657.50 1275.50 915.53 a 593.00 356.00 46.50 1.00 3.00 132.41 a 364.00 1042.76 a 1435.00 7822.21
1939 1482.50 1601.70 a 1200.00 723.50 180.00 61.00 11.88 a 19.00 225.00 609.67 a 497.50 m 1164.71 c 7278.97
1940 1793.50 1320.00 1329.00 673.50 320.50 69.50 15.00 80.00 142.76 a 391.00 1142.00 1398.00 8674.76
1941 1542.50 1427.00 1200.50 449.00 157.50 90.50 13.00 31.00 168.00 516.50 923.65 d 1277.00 7796.15
1942 1425.00 1291.00 437.00 q 135.50 n 355.39 c 90.58 d 25.26 d 41.00 307.22 c 548.91 b 1028.28 a 1606.00 6718.64
1943 1848.63 a 1431.50 1383.50 670.34 a 387.00 83.00 7.00 22.50 264.50 536.00 1118.08 d 1408.90 b 9160.95
1944 1347.47 a 1394.50 1261.50 744.50 235.00 69.00 11.50 56.00 185.50 487.00 884.50 1494.50 8170.97
1945 1663.00 1377.50 868.00 712.00 464.00 208.00 34.00 37.50 282.00 580.00 1048.50 1663.00 8937.50
1946 1626.00 1434.50 842.50 537.00 413.00 133.00 13.00 76.00 255.00 529.00 1034.00 1486.00 8379.00
1947 1448.50 1479.00 1171.50 751.00 432.00 141.50 25.50 12.00 250.00 287.50 1258.00 1541.50 8798.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 14.50 19.50 70.50 464.47 b 1015.86 a 1589.00 3173.83
1949 1681.50 1561.00 1264.50 644.48 a 256.50 56.50 14.50 27.50 262.50 474.50 893.00 1481.50 8617.98
1950 1932.50 1445.00 1355.00 913.50 407.00 68.00 23.50 87.32 a 168.00 444.00 1189.50 1684.85 a 9718.17
1951 1831.50 1403.00 1363.47 b 716.00 189.00 121.50 20.00 50.00 0.00 z 569.37 a 1252.50 1592.37 a 9108.70
1952 1747.00 1276.50 1277.50 545.00 255.50 48.50 11.00 34.00 183.00 706.80 a 954.00 1307.00 8345.80
1953 1587.50 1422.50 1129.00 749.50 314.00 62.00 17.50 5.50 208.50 368.50 874.50 1468.50 8207.50
1954 1840.37 a 1018.50 1211.50 651.00 441.50 48.50 19.50 30.50 235.50 619.50 877.00 1347.50 8340.87
1955 1648.50 1510.00 1351.50 435.50 187.50 57.00 0.00 8.50 220.86 a 522.50 1251.00 1713.00 8905.86
1956 1696.50 1563.00 1308.50 783.89 c 319.50 39.50 35.59 d 42.00 299.00 383.50 997.00 1350.57 a 8818.55
1957 1819.50 1350.00 1212.50 648.00 333.50 81.50 0.50 33.00 263.50 595.00 1040.19 d 1320.50 8697.69
1958 497.50 t 1425.50 1065.50 586.03 a 252.50 176.50 34.62 a 71.50 195.50 510.00 968.00 1637.50 6923.15
1959 1789.50 1433.00 1040.00 628.00 255.00 62.00 16.00 14.50 236.00 717.00 1272.00 1203.50 8666.50
1960 1640.00 1435.50 1390.00 668.50 302.00 106.50 18.50 19.50 239.50 532.50 964.00 1527.00 8843.50
1961 1664.50 1154.00 969.00 818.00 392.50 66.50 17.50 17.00 283.00 530.00 1031.00 1553.21 b 8496.21
1962 1778.00 1465.50 1185.00 744.50 250.50 100.00 34.00 28.50 294.00 517.38 b 933.50 1455.50 8786.38
1963 1950.50 1497.00 998.00 564.50 377.50 65.00 10.00 51.50 173.50 310.50 868.50 1758.00 8624.50
1964 1457.50 1298.50 1287.50 607.00 228.00 105.50 3.00 94.00 272.50 583.50 996.50 1708.00 8641.50
1965 1819.00 1554.50 1483.50 731.00 256.50 79.00 27.00 72.50 440.00 512.50 1055.00 1306.50 9337.00
1966 1994.50 1439.50 1014.50 786.00 438.00 81.00 5.50 87.00 246.50 630.33 a 1141.50 1571.00 9435.33
1967 1632.50 1642.50 1183.00 703.00 480.00 93.50 49.00 87.50 227.50 637.50 1078.00 1441.50 9255.50
1968 1697.50 1558.00 919.50 600.50 417.00 102.50 38.00 66.00 213.00 526.50 1028.50 1585.50 8752.50
1969 1840.00 1361.50 1341.00 605.00 308.50 217.00 33.00 10.50 213.00 701.00 1054.50 1426.50 9111.50
1970 1858.00 1455.00 1302.00 687.00 340.00 49.50 7.50 25.00 236.50 563.00 1064.50 1542.00 9130.00
1971 1859.00 1366.50 1215.00 607.00 333.50 31.00 43.50 60.00 218.00 448.00 995.50 1522.00 8699.00
1972 1909.50 1641.50 1286.50 769.50 229.00 89.00 39.50 74.50 280.00 717.50 1045.56 c 1740.81 b 9822.87
1973 1576.50 1323.50 887.50 700.34 a 358.00 54.00 14.00 9.00 246.50 402.00 971.50 1539.00 8081.84
1974 1725.00 1387.50 1212.00 620.00 399.50 90.50 2.00 81.00 309.50 527.50 970.50 1335.50 8660.50
1975 1637.50 1428.50 1387.00 879.00 207.00 90.00 20.50 30.50 279.00 469.00 949.50 1533.00 8910.50
1976 1803.00 1208.00 1194.00 494.00 281.50 32.00 7.00 29.50 214.50 717.50 1202.00 1751.00 8934.00
1977 2026.50 1267.50 927.00 404.50 83.50 50.00 7.00 61.00 186.50 558.50 0.00 z 0.00 z 5572.00
1978 0.00 z 0.00 z 0.00 z 0.00 z 219.30 d 135.00 49.17 b 72.50 192.93 a 602.50 1091.50 1727.50 4090.40
1979 2075.00 1704.37 a 1276.00 758.04 b 454.50 112.50 19.50 69.00 196.61 b 645.00 1053.00 1345.00 9708.51
1980 1741.00 1540.00 1327.00 535.50 230.36 b 83.89 c 15.00 34.00 295.50 125.50 w 558.00 n 1534.50 7336.75
1981 1523.00 1272.00 922.50 595.50 343.14 b 77.50 36.50 39.00 258.00 711.00 891.21 a 1564.00 8233.34
1982 2167.00 1540.00 1268.50 795.50 197.00 176.50 12.00 80.00 296.00 554.50 1175.50 1351.50 9614.00
1983 1536.05 a 1186.00 1032.50 734.00 402.00 96.21 a 11.50 5.50 225.00 543.00 968.28 a 2014.50 8754.53
1984 1702.79 c 1138.00 1268.50 515.00 279.00 32.00 11.50 16.00 320.50 494.50 1029.83 a 1562.40 a 8370.01
1985 1784.00 1476.50 973.00 507.00 179.80 a 138.10 a 11.50 75.00 260.50 611.50 1248.00 1864.50 9129.40
1986 702.50 s 1462.50 1071.50 492.50 255.00 72.00 3.50 71.00 222.00 544.00 1126.00 1375.00 6695.00
1987 1427.00 982.50 874.50 365.00 196.85 a 18.62 a 5.00 48.50 148.50 703.50 851.50 1321.00 6942.47
1988 1877.00 1633.00 1126.00 638.28 a 129.50 23.50 7.00 29.50 209.00 730.50 1072.00 1553.50 9028.78
1989 1571.50 1700.50 1317.50 720.50 322.50 82.00 3.00 29.50 242.50 573.50 1156.50 1799.50 9519.00
1990 1363.00 1322.50 1081.50 654.00 356.00 38.00 6.00 27.50 201.50 656.00 937.50 1583.50 8227.00
1991 1759.50 1193.50 1087.50 561.50 255.00 16.50 23.00 21.50 261.50 642.00 1259.50 1457.00 8538.00
1992 1482.50 1132.00 1059.50 732.50 207.50 77.50 65.00 87.00 260.50 624.50 1054.00 1471.50 8254.00
1993 1677.50 1406.00 1139.00 676.00 320.50 119.00 14.50 31.00 366.00 664.00 1140.00 1526.23 a 9079.73
1994 2037.50 1557.50 1093.50 681.00 269.50 60.00 17.00 71.00 169.50 534.50 950.50 1417.50 8859.00
1995 1654.50 1467.00 1106.00 772.76 a 367.00 68.00 23.50 9.50 275.00 611.50 1273.00 1572.00 9199.76
1996 1897.50 1565.00 1369.00 831.50 391.50 95.17 a 32.00 15.50 223.00 646.50 1275.50 1687.50 10029.67
1997 1816.00 1357.00 1221.00 749.00 477.50 33.50 55.50 64.00 187.00 602.50 1175.50 1244.50 8983.00
1998 1526.75 a 982.00 1120.50 519.50 150.00 142.50 2.50 4.50 116.00 500.50 944.50 1366.50 7375.75
1999 1760.50 1166.50 1038.00 627.00 253.00 116.00 2.50 19.00 267.50 630.50 822.00 1337.00 8039.50
2000 1640.50 1228.00 838.50 677.00 253.00 120.00 0.00 z 0.00 z 200.50 n 522.35 a 1075.00 1882.73 a 8237.08
2001 1536.00 1641.00 1237.42 a 646.50 255.00 101.50 24.50 15.50 258.00 629.50 703.50 1287.50 8335.92
2002 1423.00 1165.00 1437.00 741.00 466.00 64.50 10.50 24.50 205.00 827.00 1076.50 1343.00 8783.00
2003 1664.00 1525.50 1208.00 653.00 326.50 109.00 17.00 18.00 242.50 564.50 1145.00 1359.50 8832.50
2004 1833.00 1405.00 1047.50 601.00 419.00 161.00 48.00 138.50 127.50 559.00 926.50 1482.00 8748.00
2005 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
2006 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
2007 1767.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1767.00
2008 0.00 z 1612.50 1301.50 762.50 394.00 78.50 7.50 25.50 211.50 588.00 978.00 1752.00 7711.50
2009 2029.00 1405.00 1205.00 660.00 313.50 137.00 52.50 61.50 96.50 776.50 796.50 1586.50 9119.50
2010 1718.00 1403.00 884.00 434.50 306.50 78.00 0.00 20.50 285.00 499.00 1007.50 1640.00 8276.00
2011 1816.60 a 1466.50 1320.50 711.00 343.50 103.50 2.00 f 8.00 251.38 a 468.62 a 933.50 1289.00 8712.10
2012 1448.00 1214.24 b 753.19 d 579.64 b 231.50 54.50 0.00 45.50 245.00 658.75 a 994.00 1436.00 7660.32
2013 1671.00 1459.50 1377.00 40.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4507.50
Period of Record Statistics
MEAN 1716.55 1425.13 1166.39 659.35 311.48 90.63 20.84 46.14 233.12 572.19 1037.20 1524.01 8778.53
S.D. 191.39 182.67 167.83 109.73 93.24 44.80 16.68 30.57 64.46 113.59 132.21 174.44 624.92
SKEW 0.10 -0.06 -0.27 -0.25 0.13 0.59 0.81 0.70 0.04 0.08 0.14 0.21 -0.51
MAX 2221.00 1972.00 1574.50 913.50 585.00 217.00 69.50 138.50 440.00 905.00 1384.82 2014.50 10290.50
MIN 1286.50 982.00 753.19 365.00 83.50 7.00 0.00 3.00 70.50 287.50 703.50 1116.50 6766.63
NO YRS 101 104 103 104 105 103 101 104 105 106 104 105 80