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
1889 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
1890 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
1891 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
1892 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
1893 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
1894 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
1895 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
1896 0.00 z 249.50 u 1152.50 428.50 62.50 24.50 12.00 32.50 282.50 639.50 1080.50 1235.00 4950.00
1897 1530.00 1194.50 1175.50 597.50 275.00 119.50 5.50 74.00 129.00 418.50 1041.00 1551.00 8111.00
1898 1377.50 1256.08 c 978.50 648.50 257.00 27.50 9.50 48.00 190.50 667.00 998.00 1507.50 7965.58
1899 1527.00 1519.50 1325.50 502.00 215.00 18.50 2.58 a 9.00 271.00 377.00 741.50 1358.00 7866.58
1900 1326.50 1454.00 1214.00 488.00 180.50 32.00 15.50 0.00 160.50 258.00 1004.50 1218.30 a 7351.80
1901 1370.50 1433.50 1099.00 502.00 189.50 53.00 1.50 0.00 z 171.00 382.50 918.00 1386.00 7506.50
1902 1352.50 1275.00 843.00 518.00 179.00 80.50 8.50 31.00 183.50 410.00 669.00 1363.50 6913.50
1903 1426.50 1214.50 781.50 486.50 165.50 80.00 9.00 57.00 161.00 431.00 940.00 1523.00 7275.50
1904 1684.00 1589.50 1063.50 681.00 222.00 31.50 13.00 45.00 134.50 448.00 743.50 1391.00 8046.50
1905 1700.50 1485.50 929.00 550.00 269.50 42.41 a 9.19 d 7.75 a 77.22 c 424.50 f 873.00 1201.50 7145.57
1906 1282.00 1287.00 1263.25 c 446.50 268.50 73.50 11.00 9.00 92.00 497.00 867.00 1251.50 7348.25
1907 1493.00 1238.50 872.00 776.50 446.50 86.50 7.00 40.00 208.00 556.00 876.50 1181.00 7781.50
1908 1310.50 1267.50 915.00 520.00 225.50 65.50 11.50 32.50 91.50 433.50 813.50 1300.50 6987.00
1909 1426.50 1176.00 1080.00 744.00 268.50 51.00 14.00 10.00 179.00 605.50 689.50 1536.00 7780.00
1910 1520.00 1408.50 646.00 429.00 326.50 79.50 0.00 16.00 161.00 382.50 0.00 z 1426.50 6395.50
1911 1463.50 1081.00 887.50 579.50 119.00 3.50 11.88 a 0.00 z 108.00 510.50 1056.50 1108.00 6928.88
1912 2028.00 1444.00 1267.50 483.00 192.00 56.00 12.50 32.50 169.50 405.50 803.79 a 1117.50 8011.79
1913 1413.50 1376.00 1106.50 490.00 254.50 49.00 1.50 2.00 175.50 486.00 673.50 1034.00 7062.00
1914 1203.00 1453.00 1051.00 549.00 143.00 39.83 a 0.00 16.00 101.00 276.50 801.00 1481.00 7114.33
1915 1538.50 1050.00 1077.50 308.50 345.00 91.00 20.50 85.50 99.50 389.00 767.50 1274.00 7046.50
1916 1400.50 1417.50 1129.00 559.50 247.00 98.50 0.00 14.50 174.00 457.50 895.50 1507.00 7900.50
1917 1589.00 1558.50 1077.50 620.50 345.00 102.00 5.50 30.00 183.50 796.00 821.50 1555.50 8684.50
1918 1853.28 a 1304.00 837.00 660.00 a 134.00 16.00 10.00 2.50 234.00 348.00 776.50 1064.00 7239.28
1919 1278.50 1188.00 962.50 544.50 295.50 10.00 0.00 8.00 64.50 451.00 955.00 1606.50 7364.00
1920 1696.00 1353.50 968.50 676.50 224.00 23.50 8.50 23.00 63.50 250.00 903.50 1185.50 7376.00
1921 1215.00 1061.00 799.50 364.00 182.00 25.00 0.00 3.50 45.50 411.50 972.00 1264.50 6343.50
1922 1552.00 1221.50 930.50 518.00 40.00 6.50 2.00 4.50 99.00 360.50 690.00 1324.50 6749.00
1923 1353.50 1409.00 1208.50 610.50 203.50 20.00 0.00 21.00 125.50 482.00 758.00 982.50 7174.00
1924 1704.00 1193.50 1086.50 565.00 383.00 70.50 19.00 24.50 223.00 280.00 837.50 1528.50 7915.00
1925 1439.50 1109.50 897.00 363.50 303.00 33.50 9.00 5.50 74.00 736.00 907.50 1457.00 7335.00
1926 1399.00 1094.00 1195.50 622.00 163.00 83.00 2.50 0.50 163.00 493.50 993.00 1404.50 7613.50
1927 1506.50 1009.50 815.50 555.50 278.50 86.00 15.00 23.00 156.50 334.00 838.00 1439.00 7057.00
1928 1331.50 1166.00 948.00 681.00 121.50 72.50 1.50 16.50 193.00 362.50 786.50 1166.50 6847.00
1929 1810.50 1461.00 877.50 444.50 325.50 61.50 8.50 9.50 142.00 415.00 958.50 1271.50 7785.50
1930 1664.00 1002.50 947.50 475.50 187.00 25.50 6.50 0.00 90.00 496.50 741.00 1228.00 6864.00
1931 1179.50 920.00 978.00 421.50 260.50 17.07 a 0.00 14.00 55.00 281.50 591.50 967.00 5685.57
1932 1193.50 1108.50 1208.00 567.50 169.00 1.00 3.00 0.00 132.00 497.00 957.50 1320.08 a 7157.08
1933 1064.50 1257.50 1008.00 572.00 201.00 12.50 0.00 3.50 52.00 474.50 901.50 1280.00 6827.00
1934 1148.50 1248.00 1044.50 560.50 98.00 6.00 2.00 55.50 167.50 337.00 694.50 1359.50 6721.50
1935 1496.50 1134.50 900.50 582.50 335.00 93.00 0.00 32.50 115.00 413.50 909.00 1339.00 7351.00
1936 1660.00 1699.00 915.00 665.50 85.00 42.50 0.00 0.00 95.50 497.50 907.50 1168.00 7735.50
1937 1482.00 1275.50 1092.00 595.00 186.50 40.50 0.00 2.50 147.00 528.00 931.50 1397.50 7678.00
1938 1448.50 1053.00 749.50 488.50 219.00 20.00 0.00 0.50 110.00 275.00 784.00 1262.50 6410.50
1939 1221.00 1275.50 986.50 631.00 120.00 28.50 0.00 1.50 99.50 390.00 782.00 1093.50 6629.00
1940 1647.00 1201.43 a 1173.00 621.50 288.00 19.00 14.00 42.50 113.50 320.50 919.50 1231.50 7591.43
1941 1285.00 1265.00 1149.58 a 366.50 109.00 52.50 0.50 7.50 87.50 359.00 742.50 1047.50 6472.08
1942 1372.50 1217.50 859.50 369.50 254.00 35.50 4.00 18.50 209.00 409.50 836.00 1428.50 7014.00
1943 1557.00 1197.00 1177.00 582.50 264.50 45.50 0.00 8.50 216.00 423.50 958.00 1218.00 7647.50
1944 1151.00 1169.00 1104.50 640.50 137.50 38.50 3.00 7.00 88.00 395.00 689.50 1378.50 6802.00
1945 1506.00 1170.00 624.00 502.50 323.50 142.00 11.50 16.00 171.50 465.00 860.50 1457.50 7250.00
1946 1309.50 1158.00 691.00 393.50 249.50 88.00 0.00 23.50 119.00 302.50 773.50 1165.00 6273.00
1947 248.00 z 0.00 z 292.00 v 578.00 337.50 101.00 11.50 5.00 161.00 190.50 1006.00 1281.50 3672.00
1948 1578.50 1301.00 1037.00 421.03 a 240.00 26.50 3.00 3.10 a 84.00 477.50 724.50 1237.00 7133.13
1949 1357.50 1215.00 993.50 514.00 175.50 16.00 0.00 12.00 215.50 301.00 794.00 1209.00 6803.00
1950 1339.50 1227.00 1139.00 706.00 140.00 h 42.41 a 8.50 60.00 107.50 283.59 d 971.67 c 1517.00 7402.17
1951 1558.00 1217.50 1106.04 c 615.50 129.00 51.00 6.00 31.00 d 186.92 d 428.50 1086.50 1408.90 b 7824.85
1952 1400.74 d 1081.50 1088.00 441.50 259.00 17.07 a 1.19 e 14.50 140.00 596.23 a 745.00 940.50 f 5784.74
1953 1263.54 d 1098.74 a 907.50 347.50 o 156.00 n 5.00 r 3.00 p 1.11 c 47.50 n 165.50 m 594.00 f 1081.38 a 4352.27
1954 1018.50 i 879.31 b 1032.30 a 448.50 364.50 54.50 4.50 13.00 120.50 443.50 763.00 1215.50 5339.11
1955 1413.50 1231.50 1079.12 b 327.86 b 144.50 55.00 0.00 4.50 111.00 358.57 a 983.50 1411.50 7120.54
1956 1368.00 1258.50 1119.00 607.00 242.50 29.00 2.50 20.50 184.50 249.00 826.00 1183.00 7089.50
1957 1593.00 1059.50 957.00 494.50 265.50 28.50 0.50 8.50 171.00 507.00 862.50 1130.00 7077.50
1958 1338.00 1321.00 967.50 495.00 173.50 68.50 3.00 15.50 104.00 320.50 769.50 1482.00 7058.00
1959 1675.50 1346.50 1115.00 522.50 124.00 16.50 8.50 0.00 129.50 558.00 1095.00 1022.50 7613.50
1960 1285.50 1228.00 1283.50 462.50 223.50 36.00 11.00 6.50 116.50 424.50 755.00 1310.50 7143.00
1961 1425.00 991.00 897.00 649.50 265.50 28.00 3.00 0.50 149.00 381.50 826.00 1360.50 6976.50
1962 1561.50 1274.50 1064.50 565.00 133.00 41.50 2.50 2.50 192.00 351.00 815.00 1313.00 7316.00
1963 1776.50 1387.00 931.00 429.50 256.50 32.50 0.00 15.00 106.50 143.00 681.00 1547.50 7306.00
1964 1216.50 1117.50 998.00 489.00 89.50 56.00 5.00 41.50 168.00 473.00 723.50 1374.50 6752.00
1965 1495.50 1276.00 1178.00 603.00 133.00 70.00 25.83 a 79.00 147.00 h 433.50 825.00 1070.50 7189.33
1966 1711.50 1219.50 879.00 620.50 382.50 82.50 11.50 42.00 224.50 492.50 847.00 1340.50 7853.50
1967 1350.50 1401.50 996.50 562.50 424.00 40.50 48.00 95.50 235.00 510.50 965.50 1238.50 7868.50
1968 1419.50 1358.00 760.50 527.00 319.50 71.50 24.00 62.50 156.00 430.00 873.50 1349.00 7351.00
1969 1579.50 1214.00 1191.00 523.50 245.50 201.00 11.00 10.00 200.50 576.50 947.00 1333.50 8033.00
1970 1723.50 1267.50 1100.00 557.50 235.00 78.00 24.00 30.00 184.50 442.50 917.00 1338.50 7898.00
1971 1678.50 1264.50 1131.50 571.50 342.50 34.50 31.50 52.00 152.78 c 285.50 891.50 1199.50 7635.78
1972 1581.50 875.50 l 1151.50 701.00 186.50 111.00 40.00 35.50 152.50 572.00 910.00 1444.00 6885.50
1973 1315.95 a 1139.00 726.50 601.50 324.00 18.50 2.00 16.50 179.50 312.50 863.00 1346.00 6844.95
1974 1414.00 1244.50 993.50 491.50 324.50 90.00 4.50 35.00 298.50 494.00 836.00 1193.00 7419.00
1975 1390.50 1241.00 1209.00 754.00 204.50 72.00 40.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4911.00
1976 1563.50 1102.00 896.00 518.00 334.00 33.50 10.50 72.00 247.50 642.00 1090.00 1614.50 8123.50
1977 1870.00 1192.50 780.17 a 386.50 116.00 89.50 11.50 77.00 134.00 518.00 887.00 1425.00 7487.17
1978 1672.00 1468.50 1104.50 599.50 255.50 62.50 20.50 29.00 112.50 543.00 899.00 1392.00 8158.50
1979 1807.50 1496.50 1033.00 648.00 302.50 61.00 18.50 51.00 145.00 526.00 875.00 1100.00 8064.00
1980 1439.50 1358.50 1110.50 531.00 212.00 76.03 a 2.00 5.50 157.00 608.50 816.50 1301.00 7618.03
1981 1399.50 1069.00 844.50 451.50 292.00 45.50 31.50 36.50 193.00 524.50 785.00 1281.50 6954.00
1982 1734.00 1249.50 1041.50 669.50 134.00 144.00 7.00 72.50 261.00 471.50 853.50 1044.50 7682.50
1983 1295.50 1015.00 938.50 667.50 401.50 74.00 10.50 7.00 211.00 523.00 765.00 a 1622.50 7531.00
1984 1479.00 937.50 1143.50 534.50 285.50 6.50 10.50 15.00 182.00 359.00 831.00 1182.50 6966.50
1985 1560.50 1248.50 802.00 368.50 106.00 83.50 5.50 29.00 l 189.50 503.00 1052.00 1689.00 7608.00
1986 1494.00 1277.50 942.00 445.00 200.50 53.50 12.00 62.00 158.00 472.00 1024.50 1247.50 7388.50
1987 1334.50 993.50 862.50 456.50 209.00 15.00 4.50 34.50 121.50 651.00 746.50 1121.50 6550.50
1988 1615.00 1414.00 964.00 533.00 145.00 46.00 9.50 24.50 137.50 680.50 821.00 1307.00 7697.00
1989 1239.50 1432.00 1134.50 638.50 288.50 79.50 10.50 20.00 209.00 438.50 943.50 1639.00 8073.00
1990 1139.50 1131.00 862.00 532.00 367.50 54.00 10.00 24.00 148.50 558.50 740.00 1375.00 6942.00
1991 1600.00 1121.50 921.50 474.50 198.00 23.00 11.50 21.00 253.00 516.00 1034.50 1252.50 7427.00
1992 1273.00 1063.50 983.00 670.50 255.50 91.00 40.50 84.00 223.00 546.50 952.50 1292.50 7475.50
1993 1444.50 1282.00 1083.50 680.50 223.50 85.00 1.00 14.00 295.50 557.50 929.50 1248.00 7844.50
1994 1807.00 1439.50 965.50 526.00 251.50 51.50 21.00 50.50 105.00 396.00 762.00 1131.50 7507.00
1995 1451.50 1213.50 915.00 702.50 264.00 30.50 20.00 0.00 225.00 450.50 1120.00 1405.00 7797.50
1996 1573.50 1331.00 1186.00 696.00 378.50 46.00 10.50 17.50 175.00 477.50 1096.00 1359.00 8346.50
1997 1575.00 1168.00 998.50 629.50 394.00 30.50 27.00 50.00 132.00 496.50 954.00 1128.50 7583.50
1998 1296.50 885.00 966.50 480.00 120.50 98.00 0.50 0.50 71.50 426.00 738.50 1085.00 6168.50
1999 1556.00 976.00 937.50 473.00 172.00 56.50 0.00 16.00 195.50 518.50 654.00 1219.00 6774.00
2000 1419.00 1058.50 737.50 567.50 197.50 59.00 18.50 6.00 183.00 382.50 900.50 1677.50 7207.00
2001 1346.50 1286.00 1062.00 442.00 197.00 85.00 13.50 5.50 209.50 511.50 551.50 1068.50 6778.50
2002 1168.00 989.00 1113.00 568.50 343.00 46.00 2.00 6.50 98.00 597.50 916.00 1183.50 7031.00
2003 1521.50 1349.00 1016.00 596.50 283.00 64.50 4.00 3.00 171.50 493.50 857.50 1164.00 7524.00
2004 1589.00 1226.50 849.00 527.50 283.50 74.00 17.50 88.00 86.50 458.50 766.00 1279.00 7245.00
2005 1498.50 1039.00 1076.00 440.50 307.00 14.00 12.00 14.50 86.50 464.50 841.50 1414.50 7208.50
2006 1067.50 1226.50 944.00 424.00 257.00 38.50 0.50 2.50 218.50 609.50 756.50 1071.50 6616.50
2007 1252.50 1406.50 868.50 602.50 164.50 26.00 2.50 15.00 124.00 319.50 879.00 1391.50 7052.00
2008 1476.12 a 1465.50 1138.50 542.00 317.50 21.50 2.50 11.00 105.00 499.50 855.00 1509.00 7943.12
2009 1718.50 1159.50 995.50 597.00 210.00 72.00 37.00 41.00 89.00 627.50 688.00 1332.50 7567.50
2010 1494.00 1186.00 818.00 384.00 225.00 15.00 0.00 1.50 164.00 390.00 802.50 1421.50 6901.50
2011 1529.00 1235.50 1044.00 618.00 287.50 59.00 0.00 5.50 226.00 430.90 a 778.50 1102.00 7315.90
2012 1277.50 1026.50 515.00 527.50 134.50 37.50 1.00 20.00 206.50 384.00 h 0.00 z 0.00 z 3746.00
Period of Record Statistics
MEAN 1463.84 1232.30 997.37 542.92 234.75 52.92 9.07 23.76 154.71 449.93 855.72 1303.16 7321.79
S.D. 184.90 157.24 149.66 97.65 84.68 33.07 10.07 23.46 55.49 113.69 116.12 161.52 518.36
SKEW 0.27 0.17 -0.42 -0.05 0.11 1.13 1.66 1.23 0.31 0.14 0.12 0.19 -0.21
MAX 2028.00 1699.00 1325.50 776.50 446.50 201.00 48.00 95.50 298.50 796.00 1120.00 1689.00 8684.50
MIN 1064.50 879.31 515.00 308.50 40.00 1.00 0.00 0.00 45.50 143.00 551.50 967.00 5685.57
NO YRS 114 114 116 116 115 116 116 113 114 113 113 114 102