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
1898 0.00 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 682.50 0.00 z 1580.00 2262.50
1899 1556.50 1538.00 1501.00 578.00 254.00 16.50 7.50 1.50 211.00 405.00 679.50 1367.00 8115.50
1900 1320.50 1515.00 1211.50 435.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 265.50 1118.50 964.00 h 5866.00
1901 1540.50 1479.85 a 1113.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 427.50 1051.55 a 946.50 i 5612.40
1902 1468.88 a 844.00 h 904.50 0.00 z 128.59 d 0.00 z 0.00 z 0.00 z 0.00 z 479.00 851.50 1526.00 5358.48
1903 1526.23 a 1406.50 958.00 552.00 175.00 59.00 14.50 47.50 229.00 423.15 a 960.00 1520.00 7870.88
1904 1652.00 1691.00 1049.00 674.00 229.18 c 32.14 b 9.50 29.00 140.00 427.00 761.50 1416.50 8110.82
1905 1814.50 1534.50 831.50 596.50 277.00 37.00 15.00 0.00 67.50 562.50 776.38 a 1243.10 a 7755.48
1906 1308.72 a 1281.26 a 1208.50 423.62 a 262.50 50.40 e 10.00 16.00 67.50 538.00 972.50 534.50 s 6139.00
1907 1263.50 i 1327.76 c 968.00 830.00 499.50 79.50 3.00 22.00 197.50 514.50 899.00 1230.50 6571.26
1908 1394.00 1246.00 1007.50 527.00 252.50 78.00 17.50 27.50 112.50 520.50 847.50 1358.00 7388.50
1909 1537.50 1335.50 1110.00 771.50 304.00 52.50 23.00 5.00 159.00 489.00 879.00 1648.50 8314.50
1910 965.00 n 233.50 w 603.50 393.10 a 209.50 k 87.00 0.00 24.00 149.50 360.63 a 1056.50 1403.00 4077.24
1911 1670.00 1194.00 802.00 596.00 142.00 8.50 15.50 52.50 178.00 569.00 1200.50 1266.50 7694.50
1912 2066.50 1437.50 1233.00 510.00 207.00 102.00 19.00 18.00 238.00 445.50 811.50 1252.50 8340.50
1913 1580.50 1421.00 1190.00 539.50 313.00 54.00 1.00 0.00 184.00 535.50 712.00 1097.50 7628.00
1914 1292.00 1544.15 a 1064.00 599.00 191.00 26.00 0.50 42.62 c 134.48 a 308.00 809.00 1620.00 7630.76
1915 1585.50 1122.00 1164.50 294.64 b 367.50 127.50 31.50 74.50 175.50 387.00 855.00 1257.71 c 7442.86
1916 1657.47 a 1525.50 1079.00 623.50 303.50 95.00 0.00 19.50 202.50 514.00 885.00 1583.50 8488.47
1917 1797.48 a 1617.50 1147.00 662.50 336.50 76.50 17.50 22.00 168.50 763.00 769.00 1709.00 9086.48
1918 1888.00 1346.59 a 800.50 652.00 198.92 a 45.00 6.50 8.50 289.82 b 221.00 m 0.00 z 0.00 z 5235.83
1919 0.00 z 0.00 z 897.00 539.00 248.50 32.50 0.00 13.50 82.50 601.50 1073.00 1653.50 5141.00
1920 1710.50 1335.55 a 1023.52 a 868.97 a 269.00 82.76 a 10.50 46.00 119.00 389.50 1052.50 1353.00 8260.79
1921 1329.00 1161.50 884.00 465.50 254.72 a 36.21 a 0.53 b 13.50 65.00 451.64 b 1145.36 b 1325.00 7131.95
1922 1572.50 1404.00 969.27 a 565.00 132.00 13.00 11.50 7.00 99.00 353.40 a 751.50 1452.50 7330.67
1923 1396.66 c 1433.00 1259.00 590.50 240.50 48.50 0.00 21.00 114.50 548.50 789.31 a 1042.12 a 7483.59
1924 1733.86 b 1246.00 1108.77 a 516.50 432.50 80.50 22.00 41.16 b 232.00 267.50 885.00 1748.40 a 8314.18
1925 1614.50 1226.50 909.16 b 353.28 a 328.00 45.00 23.00 6.00 104.50 884.02 a 953.50 1468.00 7915.45
1926 1456.50 1080.00 1134.00 630.50 155.00 c 83.57 b 6.50 1.50 218.50 520.00 1080.50 1521.50 7888.07
1927 1518.00 1102.00 897.00 552.50 318.78 a 138.50 19.50 50.50 204.00 375.50 993.50 1684.00 7853.78
1928 1389.00 1211.56 b 933.50 761.00 159.00 101.00 3.50 31.00 217.00 456.00 876.50 1214.00 7353.06
1929 1874.50 1561.00 937.50 532.00 306.68 c 71.00 0.00 i 14.00 224.50 473.27 a 1090.50 1408.50 8493.45
1930 1796.00 989.50 984.00 483.00 233.57 b 48.00 11.50 5.50 156.50 559.50 815.00 1272.00 7354.07
1931 1187.00 901.50 1016.50 454.50 315.00 28.50 2.50 22.00 76.50 339.50 743.00 1052.50 6139.00
1932 1488.50 1261.50 1290.00 529.50 182.00 2.00 10.00 11.00 164.00 552.50 1038.50 1451.50 7981.00
1933 1194.50 1388.50 1047.50 570.00 250.00 16.50 0.00 10.50 57.00 503.00 936.50 1390.50 7364.50
1934 1338.00 1187.00 1015.50 538.00 75.00 4.00 4.00 53.50 224.50 319.50 785.00 1520.50 7064.50
1935 1628.50 1076.50 872.00 641.00 352.50 102.50 0.00 50.00 139.00 536.50 1084.50 1465.50 7948.50
1936 1933.00 1930.00 1030.50 696.00 107.98 a 64.50 0.00 0.00 104.50 556.50 1010.00 1284.00 8716.98
1937 1861.00 1421.00 1153.50 597.00 210.50 85.50 3.00 0.00 149.00 569.00 1015.00 1489.50 8554.00
1938 1585.50 1234.00 812.50 519.50 305.50 46.00 0.00 3.00 99.00 284.50 977.50 1339.20 a 7206.20
1939 1343.00 1466.00 1010.00 611.50 105.00 33.00 1.50 13.00 104.00 477.00 801.50 1097.50 7063.00
1940 1806.00 1275.00 1192.00 680.50 330.00 44.50 18.50 53.00 148.50 354.00 1125.00 1359.87 a 8386.87
1941 1487.00 1424.89 a 1159.50 458.50 130.00 64.14 a 14.50 23.50 137.00 444.00 890.00 1173.00 7406.03
1942 1452.00 1290.50 939.50 458.00 318.50 74.50 12.00 28.00 295.00 508.00 998.50 1574.50 7949.00
1943 1799.00 1353.50 1293.00 614.00 386.00 79.50 4.00 28.00 281.50 500.65 a 1091.00 1351.00 8781.15
1944 1215.50 1296.20 a 1267.50 754.00 199.00 67.00 10.50 49.50 188.00 506.00 825.00 1478.50 7856.70
1945 1593.00 1320.00 856.50 671.50 459.00 179.50 36.00 22.00 229.50 502.50 1046.50 1597.50 8513.50
1946 1569.50 1320.00 750.50 456.50 357.50 98.50 2.00 43.00 202.00 445.00 971.50 1301.00 7517.00
1947 1377.50 1475.50 1161.50 720.50 363.73 a 114.00 19.00 8.50 193.50 268.00 1123.00 1505.50 8330.23
1948 1726.00 1464.00 1220.50 499.50 284.50 49.00 8.50 19.00 85.50 505.00 877.50 1418.00 8157.00
1949 1624.40 a 1463.50 1125.50 577.50 182.50 19.50 5.00 9.00 247.00 391.00 832.50 1380.00 7857.40
1950 1759.50 1386.50 1293.50 861.72 a 316.50 71.00 23.50 85.50 148.50 376.00 1157.00 1663.50 9142.72
1951 1730.00 1334.15 a 1408.90 b 768.00 148.50 86.50 17.50 22.00 275.00 527.50 1180.50 1519.50 9018.04
1952 1655.00 1135.66 a 1231.00 540.50 267.50 28.50 13.00 27.00 163.00 636.50 890.00 1344.50 7932.16
1953 1519.50 1265.50 1057.00 740.50 286.00 39.00 8.50 1.00 162.50 309.50 803.50 1342.00 7534.50
1954 1715.00 922.00 1184.50 564.50 400.50 60.00 0.00 6.50 137.50 549.00 831.00 1318.00 7688.50
1955 1549.50 1449.00 1225.00 367.00 115.00 59.50 0.00 3.50 134.50 479.00 1199.00 1661.50 8242.50
1956 1689.50 1528.50 1246.00 726.00 269.00 27.00 10.50 24.50 204.50 297.50 963.50 1281.50 8268.00
1957 1734.50 1217.00 1106.00 603.50 319.50 45.00 0.00 22.00 202.50 546.50 993.50 1220.50 8010.50
1958 1338.00 1457.50 1066.00 580.00 196.00 127.50 11.50 34.50 124.00 420.00 885.00 1562.00 7802.00
1959 1733.50 1478.50 1084.50 576.00 214.00 40.00 18.00 10.00 193.00 678.00 1234.00 1099.00 8358.50
1960 1511.00 1359.50 1500.00 594.00 274.50 71.00 15.00 11.50 189.00 468.50 873.00 1472.00 8339.00
1961 1588.00 1191.50 1040.00 778.50 354.00 54.00 3.50 13.00 241.55 a 472.00 969.00 1528.00 8233.05
1962 1752.00 1398.00 1325.50 710.50 160.50 68.50 35.00 14.00 249.00 423.00 828.00 1381.50 8345.50
1963 1876.50 1412.50 970.50 530.50 308.50 29.00 5.50 35.50 124.50 191.00 797.50 1677.00 7958.50
1964 1363.50 1191.00 1249.50 589.50 163.50 48.50 3.50 84.50 229.50 541.00 914.00 1606.50 7984.50
1965 1746.50 1538.00 1494.00 718.50 195.00 20.50 5.00 55.00 376.50 468.50 983.00 1159.00 8759.50
1966 1943.50 1421.50 936.00 723.50 404.00 40.00 4.50 60.00 187.50 559.50 1083.50 1485.50 8849.00
1967 1559.00 1530.50 1069.00 636.00 433.00 31.00 42.50 70.00 199.50 588.50 1033.00 1354.00 8546.00
1968 1634.00 1461.00 889.50 579.50 396.50 89.00 22.50 53.50 201.00 501.00 948.00 1507.50 8283.00
1969 1829.50 1354.50 1405.50 585.50 256.00 162.50 14.00 2.50 151.50 644.00 973.50 1436.50 8815.50
1970 1908.50 1422.50 1289.50 658.00 270.00 52.50 22.00 14.50 233.00 544.00 1037.50 1550.00 9002.00
1971 1804.50 1398.00 1231.00 590.50 348.00 21.00 38.50 39.50 187.00 392.00 956.50 1473.00 8479.50
1972 1787.50 1570.00 1151.50 724.50 218.00 86.00 37.00 69.00 210.00 647.50 971.00 1664.00 9136.00
1973 1522.50 1254.00 837.00 643.50 346.50 29.50 3.00 8.50 205.00 373.50 937.50 1545.50 7706.00
1974 1668.50 1317.00 1071.50 571.50 359.00 85.50 1.00 44.00 277.50 493.50 936.50 1328.50 8154.00
1975 1559.50 1417.50 1341.00 810.00 209.00 71.00 16.50 5.50 251.00 442.50 841.50 1367.50 8332.50
1976 1577.50 1085.00 1046.50 458.00 281.50 36.00 5.50 28.00 215.50 671.00 1133.00 1643.00 8180.50
1977 1933.50 1135.50 810.50 343.00 45.00 19.50 2.50 34.50 92.00 544.00 1000.50 1561.50 7522.00
1978 1921.00 1579.00 1154.00 614.00 243.00 50.00 14.50 15.50 89.50 509.00 1008.50 1625.50 8823.50
1979 2040.00 1700.00 1237.00 735.50 352.50 59.00 1.50 39.00 138.00 547.00 980.50 1245.00 9075.00
1980 1522.00 1465.00 1193.00 543.50 201.50 37.50 0.00 20.00 154.50 623.00 848.50 1435.50 8044.00
1981 1475.00 1155.50 886.50 453.50 269.00 25.50 18.00 15.00 196.00 624.50 820.00 1540.50 7479.00
1982 1987.50 1422.50 1114.00 735.00 179.50 125.50 2.00 51.00 216.00 502.50 1087.50 1254.50 8677.50
1983 1459.00 1153.50 1059.50 746.50 375.50 69.50 2.50 1.00 215.50 549.00 942.00 2013.50 8587.00
1984 1640.50 1164.50 1326.00 608.00 330.00 18.50 16.00 17.50 264.50 474.50 940.00 1401.50 8201.50
1985 1707.50 1377.50 884.00 466.50 127.50 103.50 5.50 48.00 251.50 568.50 1242.00 1843.00 8625.00
1986 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 28.50 6.50 69.00 153.00 498.50 1139.50 1283.50 3178.50
1987 1364.50 920.00 852.50 419.00 113.50 19.50 9.00 61.00 118.00 671.00 818.50 1260.00 6626.50
1988 1811.00 1596.00 979.50 612.00 84.00 6.00 1.50 22.50 125.00 666.50 968.50 1423.00 8295.50
1989 1315.50 1557.50 1219.00 618.00 261.50 72.50 0.50 9.00 202.50 466.00 1123.50 1710.50 8556.00
1990 1212.00 1232.00 931.00 617.00 326.50 59.50 14.50 13.50 152.00 549.00 857.00 1570.00 7534.00
1991 1723.50 1147.00 1014.00 518.50 238.00 5.50 10.00 19.50 235.50 592.50 1263.50 1340.50 8108.00
1992 1342.00 1107.50 998.50 711.00 226.00 61.00 61.00 74.50 215.00 549.00 1049.50 1440.50 7835.50
1993 1658.50 1427.50 1232.00 691.50 293.50 83.50 6.50 24.50 316.50 587.50 1059.00 1406.00 8786.50
1994 1910.50 1554.00 991.00 610.50 211.50 17.50 14.00 57.50 120.50 425.50 855.50 1336.50 8104.50
1995 1529.00 1269.00 1023.00 741.00 299.50 52.00 14.50 6.50 232.00 562.50 1172.00 1398.50 8299.50
1996 1758.50 1378.50 1256.00 730.50 388.50 59.50 12.50 7.50 218.50 498.50 1228.50 1645.00 9182.00
1997 1758.50 1272.50 1085.00 694.00 426.50 2.50 33.00 26.50 122.50 491.50 1139.50 1224.00 8276.00
1998 1499.00 985.00 1119.50 505.00 108.00 105.00 0.50 0.00 76.00 446.50 836.00 1221.50 6902.00
1999 1683.50 1057.50 990.00 549.00 203.00 75.00 0.50 4.50 211.03 a 537.00 690.50 1262.50 7264.03
2000 1563.00 1082.50 768.00 565.00 176.00 65.50 19.00 8.00 177.50 408.00 1057.50 1849.00 7739.00
2001 1495.50 1553.50 1257.50 541.50 222.00 65.00 4.13 a 16.02 a 194.00 543.00 576.43 b 1188.33 a 7656.91
2002 1292.50 1186.50 1246.00 606.50 341.00 38.00 1.00 23.00 161.50 722.50 997.50 1202.00 7818.00
2003 1525.50 1345.00 1049.00 543.50 260.00 50.50 2.00 7.50 188.00 486.50 993.50 1280.50 7731.50
2004 1598.00 1340.50 866.00 477.00 276.00 78.50 14.00 109.50 84.00 453.50 804.50 1302.00 7403.50
2005 1595.00 1065.00 1071.50 419.00 313.00 1.00 6.50 8.50 83.00 434.50 830.00 1495.00 7322.00
2006 1171.00 1302.00 1026.50 408.50 231.00 28.00 0.00 1.50 210.50 600.50 890.00 1161.50 7031.00
2007 1465.00 1528.50 934.50 618.00 131.00 35.50 5.00 3.50 123.00 363.50 926.50 1570.67 a 7704.67
2008 1706.15 d 1498.00 1128.50 661.50 258.00 13.00 0.00 8.50 113.00 496.00 914.00 1611.00 8407.65
2009 1775.50 1228.00 1021.50 567.50 215.50 82.00 19.50 32.00 79.00 684.00 696.50 1529.00 7930.00
2010 1750.00 1454.00 917.50 336.50 239.00 19.50 0.00 2.50 144.00 377.00 920.00 1547.50 7707.50
2011 1728.50 1357.50 1144.50 607.50 249.00 32.00 0.00 3.50 205.50 404.50 843.50 1218.00 7794.00
2012 1301.50 1112.50 548.50 470.50 115.50 27.50 0.00 29.50 172.24 a 558.00 858.50 1317.00 6511.24
2013 1524.68 a 1322.50 1252.50 36.50 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 4099.68
Period of Record Statistics
MEAN 1604.11 1336.87 1073.98 589.89 257.04 56.32 10.42 25.62 174.69 493.99 949.61 1426.63 8002.00
S.D. 201.48 180.95 177.46 117.01 91.89 34.59 10.99 22.55 61.55 111.94 139.16 181.04 601.18
SKEW -0.06 -0.04 -0.07 -0.03 0.07 0.84 1.65 1.17 0.25 0.15 0.11 0.30 -0.29
MAX 2066.50 1930.00 1501.00 868.97 499.50 179.50 61.00 109.50 376.50 884.02 1263.50 2013.50 9182.00
MIN 1171.00 901.50 548.50 294.64 45.00 1.00 0.00 0.00 57.00 191.00 576.43 1042.12 6139.00
NO YRS 111 111 114 111 110 111 110 111 111 114 113 111 104