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 1784.50 1425.00 1182.00 699.50 349.50 35.50 3.58 e 0.00 z 196.15 d 417.50 0.00 z 1396.15 d 7489.38
1894 1398.62 a 1264.50 832.00 507.32 b 252.98 c 0.00 z 0.00 q 25.46 c 93.00 e 478.29 c 1015.56 c 1103.00 6970.73
1895 1117.00 i 1343.00 0.00 z 583.45 a 206.00 0.00 n 0.00 z 0.00 o 80.00 565.50 921.00 1186.50 4885.45
1896 1346.50 1276.50 1188.00 494.50 84.50 45.54 b 0.00 z 35.77 e 256.00 622.00 602.50 n 1218.62 b 6567.93
1897 1456.50 1205.00 1143.50 624.00 305.50 127.00 2.50 73.00 89.00 0.00 z 0.00 z 1362.45 a 6388.45
1898 0.00 z 0.00 z 0.00 z 462.78 c 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 555.33 b 936.00 1485.00 3439.11
1899 1477.00 1483.00 1361.50 428.00 157.50 0.00 z 6.00 0.00 258.50 395.00 702.50 1276.00 7545.00
1900 1288.00 1413.50 1216.50 514.00 225.00 0.00 z 0.00 z 0.00 z 95.56 c 0.00 z 962.00 0.00 z 5714.56
1901 1365.07 b 0.00 z 1139.25 a 484.00 161.72 a 35.00 c 1.55 a 0.00 z 133.27 d 0.00 z 689.50 g 372.50 u 3319.85
1902 1292.81 d 1261.50 411.00 q 0.00 z 180.50 f 71.40 e 13.50 45.43 b 157.24 a 463.89 c 505.50 i 1089.00 f 3305.78
1903 1347.35 d 1213.69 b 811.50 552.93 a 217.60 e 98.00 8.30 c 0.00 z 144.00 j 478.00 985.00 1541.00 7253.38
1904 1699.83 a 1572.73 a 1132.00 784.00 275.26 b 0.00 z 8.04 d 23.52 b 146.00 484.50 786.50 1415.84 b 8328.22
1905 702.50 r 1490.50 984.50 595.71 b 339.45 a 57.41 a 19.67 e 10.16 b 70.34 a 534.20 c 906.00 e 1211.00 6218.95
1906 1268.00 1249.11 a 1255.50 b 520.96 d 313.62 a 63.62 a 12.92 a 12.92 a 76.03 a 520.05 b 891.00 1254.90 e 7438.63
1907 1524.88 b 1269.50 921.00 836.00 488.50 117.69 d 9.00 38.20 c 225.00 c 555.50 906.50 1237.42 a 8129.18
1908 1362.50 1302.50 696.00 h 586.00 253.17 a 88.50 11.50 26.00 75.00 451.88 e 852.41 a 1343.50 6352.96
1909 1422.79 b 1171.00 1092.00 778.45 a 338.50 72.41 a 19.50 3.58 e 195.00 a 609.67 a 724.14 a 1562.92 a 7989.95
1910 1499.50 1387.00 691.50 498.50 385.20 d 109.20 e 3.50 13.50 146.25 b 379.00 1085.00 1442.00 7640.15
1911 1491.00 1109.00 967.50 646.00 196.69 b 12.00 17.00 37.50 151.50 553.00 1123.50 1158.00 7462.69
1912 2028.00 1491.00 1301.00 562.00 273.00 59.00 19.12 a 76.50 196.00 483.50 862.00 1193.00 8544.12
1913 1422.90 a 1414.00 1180.50 568.00 318.55 b 75.50 13.00 20.50 211.50 542.00 802.50 1064.50 7633.45
1914 1246.50 1540.50 1134.50 696.00 239.50 85.86 a 1.07 b 42.50 166.07 b 346.00 640.00 k 1637.83 d 7136.34
1915 1549.00 1060.50 1128.00 374.50 432.50 161.50 53.00 125.00 150.00 415.50 802.50 1234.50 7486.50
1916 1400.50 1444.00 913.00 f 583.50 270.50 115.00 0.00 21.50 206.38 a 484.50 922.50 1470.95 a 6919.33
1917 1590.50 1546.50 1056.50 668.00 399.50 120.50 7.50 41.50 150.00 a 746.00 824.50 1492.00 8643.00
1918 1831.14 b 1292.50 859.50 662.00 180.50 27.50 18.00 2.50 266.50 355.50 757.00 1050.00 7302.64
1919 1249.50 1147.00 948.00 555.50 306.00 11.50 0.00 19.50 90.50 462.50 961.00 1608.50 7359.50
1920 1694.50 1369.00 999.50 744.50 274.50 52.50 19.00 45.50 84.00 266.50 912.50 1190.00 7652.00
1921 1238.50 1064.50 841.50 401.00 249.00 42.00 0.00 10.50 54.50 421.00 983.50 1287.00 6593.00
1922 1581.52 a 1264.67 a 990.00 591.00 77.00 70.00 90.00 j 29.00 169.00 480.50 786.50 1367.62 a 7406.80
1923 1356.00 1386.00 1228.50 659.50 267.00 28.50 4.00 37.50 153.50 525.00 760.00 944.31 e 7349.81
1924 1690.05 c 1253.00 1067.00 575.50 378.50 86.50 20.50 17.00 246.50 315.50 870.50 1567.00 8087.55
1925 1454.70 d 1147.00 963.50 438.00 390.50 53.28 a 13.50 13.00 104.00 797.50 956.50 1485.00 7816.48
1926 1451.50 1165.00 1288.50 733.50 264.50 135.50 14.50 12.50 205.00 563.00 1039.00 1450.00 8322.50
1927 1561.50 1078.50 870.50 628.50 364.00 142.50 13.00 69.00 183.50 396.50 884.00 1454.00 7645.50
1928 1389.00 1253.00 1078.00 795.00 a 231.98 a 131.50 13.00 24.00 221.38 a 432.50 836.00 1191.50 7596.86
1929 1847.50 1507.00 950.50 559.00 425.00 135.00 17.00 47.50 188.57 b 459.50 1016.50 1324.22 a 8477.29
1930 1672.00 1098.50 1053.00 583.50 258.00 50.50 14.00 25.50 120.00 494.00 782.50 1278.00 7429.50
1931 1241.00 1008.50 1034.00 580.00 337.00 53.00 2.00 38.50 77.50 351.50 655.50 1030.00 6408.50
1932 1221.50 1178.00 1278.00 680.00 278.50 7.50 16.50 10.50 148.00 552.00 1013.00 1353.00 7736.50
1933 1144.00 1307.00 1114.50 658.50 246.00 23.00 3.00 25.00 72.50 544.00 1006.50 1355.00 7499.00
1934 1223.50 1367.00 1170.50 647.00 142.50 15.00 12.00 83.00 193.50 411.50 749.50 1416.50 7431.50
1935 1553.00 1241.15 b 992.52 a 701.50 417.00 114.50 0.00 46.50 161.50 494.00 956.00 1377.50 8055.17
1936 1706.00 1749.50 1015.00 776.50 150.00 87.50 2.50 6.50 120.00 562.00 994.00 1178.00 8347.50
1937 1511.00 1279.50 1165.00 681.00 274.50 69.50 3.50 4.00 171.00 581.50 949.00 1410.50 8100.00
1938 1509.50 1120.00 868.50 554.00 281.00 52.00 2.50 5.00 144.00 310.00 a 835.00 1328.50 7010.00
1939 1283.50 1348.50 1066.50 703.50 206.50 49.50 8.00 10.50 141.00 482.50 831.00 1051.50 7182.50
1940 1657.00 1232.00 1161.50 706.50 339.00 39.50 12.50 41.00 137.50 378.00 962.50 1253.50 7920.50
1941 1355.50 1297.50 1191.00 456.50 164.00 55.00 8.50 14.50 104.00 399.00 786.00 1075.00 6906.50
1942 1416.50 1245.00 926.00 421.00 300.00 51.00 14.00 22.50 223.50 440.00 861.50 1440.50 7361.50
1943 1566.50 1245.00 1206.00 664.00 318.00 60.00 4.00 12.00 246.00 502.50 988.00 1300.50 8112.50
1944 1179.50 1213.00 1182.00 717.00 187.50 38.00 6.00 12.50 118.00 469.50 736.00 1446.00 7305.00
1945 1581.50 1272.00 722.50 550.50 375.00 148.97 a 25.00 19.50 193.50 534.50 917.50 1482.50 7822.97
1946 1383.50 1243.50 776.00 509.00 321.50 117.50 0.00 36.00 153.00 338.50 835.00 1255.00 6968.50
1947 1322.00 1356.00 1099.50 684.00 448.50 125.50 16.50 7.00 181.50 191.00 1035.50 1336.50 7803.50
1948 1634.00 1384.00 1114.00 482.00 319.50 53.50 3.50 9.50 107.00 488.50 760.50 1302.00 7658.00
1949 1392.00 1250.50 1057.00 567.00 244.50 29.00 0.00 19.00 214.50 343.00 872.50 1235.00 7224.00
1950 1428.00 1273.50 1203.50 820.00 295.00 62.50 22.50 75.00 139.00 333.50 1022.00 1562.50 8237.00
1951 1605.00 1286.50 1174.50 673.50 193.50 70.50 8.00 37.00 218.50 493.00 1128.50 1395.50 8284.00
1952 1431.50 1191.00 1160.50 508.50 290.00 35.50 3.00 21.50 144.00 633.50 815.50 1203.50 7438.00
1953 1344.00 1223.50 1035.00 688.00 279.50 34.50 5.50 7.00 156.50 338.00 740.00 1210.50 7062.00
1954 1462.00 984.00 1105.00 536.00 433.50 71.00 8.50 26.00 149.00 500.50 828.00 1301.50 7405.00
1955 1473.50 1270.50 1149.00 434.00 207.50 57.50 1.00 10.00 141.50 423.00 1030.50 1450.00 7648.00
1956 1438.00 1321.50 1234.00 721.00 350.00 57.50 18.50 27.50 226.50 295.50 908.00 1253.00 7851.00
1957 1665.00 1143.50 1049.50 579.50 331.00 56.50 4.50 21.50 212.00 536.82 a 916.00 1202.50 7718.32
1958 1398.50 1400.50 1033.50 594.50 273.00 127.00 9.00 28.00 142.00 393.00 833.50 1533.50 7766.00
1959 1686.92 a 1432.00 1211.50 620.00 174.00 38.50 13.50 0.00 157.00 600.00 1152.50 1097.50 8183.42
1960 1333.00 1274.00 1371.50 546.50 322.50 69.00 25.00 11.00 153.50 488.00 808.50 1377.50 7780.00
1961 1468.50 1057.50 962.50 716.00 352.50 55.50 7.00 14.00 162.50 415.00 890.50 1419.50 7521.00
1962 1648.50 1365.50 1121.50 639.00 192.00 64.50 16.50 16.50 226.50 417.50 863.00 1377.00 7948.00
1963 1792.00 1465.00 1051.00 560.50 334.00 55.50 11.00 32.00 141.50 175.50 731.00 1562.50 7911.50
1964 1262.50 1173.50 1074.50 560.00 152.00 84.00 14.50 60.00 208.50 514.50 774.50 1419.00 7297.50
1965 1537.00 1328.00 1252.50 728.00 171.00 70.00 13.00 50.50 204.00 476.00 852.50 1091.00 7773.50
1966 1688.50 1239.50 952.00 665.00 407.00 68.00 5.00 26.50 188.00 476.50 881.50 1336.00 7933.50
1967 1381.50 1425.00 1063.50 610.50 438.50 35.00 45.00 71.00 195.00 533.00 987.50 1243.50 8029.00
1968 1438.00 1371.50 811.00 523.00 337.00 76.50 27.50 49.00 113.50 440.50 871.50 1329.00 7388.00
1969 1556.00 1181.50 1194.00 584.50 267.00 183.00 19.50 7.50 188.00 555.50 950.50 1314.00 8001.00
1970 1706.50 1294.50 1125.00 562.50 259.00 55.00 11.50 15.50 157.00 408.00 908.00 1350.50 7853.00
1971 1691.00 1280.00 1154.00 626.00 349.00 41.00 13.50 36.50 112.00 274.00 882.50 1235.00 7694.50
1972 1622.00 1395.50 1197.50 770.50 196.00 90.50 30.50 31.50 170.50 590.00 915.50 1438.00 8448.00
1973 1327.00 1156.50 809.00 653.50 374.50 13.50 4.00 10.50 159.00 320.50 889.00 1338.50 7055.50
1974 1439.00 1282.00 1050.50 556.50 368.50 99.00 0.00 17.00 253.00 488.50 837.50 1186.50 7578.00
1975 1373.00 1262.50 1208.00 786.00 187.50 60.50 26.00 12.00 250.50 406.50 716.00 1303.00 7591.50
1976 1578.50 1125.00 979.50 537.50 332.00 13.50 2.00 46.00 201.50 633.00 1105.50 1645.00 8199.00
1977 1883.00 1209.00 833.50 448.50 101.00 98.50 1.00 42.00 110.50 503.00 900.00 1423.50 7553.50
1978 1641.00 1446.50 1138.00 687.00 251.50 58.50 18.50 7.00 115.50 515.50 906.50 1424.50 8210.00
1979 1796.00 1511.00 1083.00 701.00 304.00 46.50 6.50 31.50 107.50 555.00 903.50 1147.00 8192.50
1980 1468.50 1356.00 1151.00 563.00 198.00 72.00 1.50 11.00 160.50 640.50 879.50 1352.50 7854.00
1981 1470.00 1139.50 920.50 523.00 247.50 19.44 c 0.00 7.50 198.00 587.97 a 789.31 a 1295.00 7197.72
1982 1744.50 1314.50 1088.00 715.50 107.00 105.50 0.00 41.50 206.50 420.50 893.50 1119.50 7756.50
1983 1298.50 1043.00 1046.50 750.50 431.00 76.00 15.50 2.00 218.50 495.00 866.50 1706.50 7949.50
1984 1571.00 1026.00 1212.50 568.00 359.50 4.50 x 4.00 k 19.50 224.00 433.00 908.00 1291.00 7612.50
1985 1661.50 1381.50 963.50 531.50 186.00 115.00 10.50 53.50 227.50 485.50 1001.50 1678.50 8296.00
1986 1483.50 1304.50 1006.50 483.00 193.50 49.00 11.00 51.50 156.50 486.50 1027.50 1252.50 7505.50
1987 1331.50 1026.50 890.00 505.00 221.50 28.00 7.50 38.00 115.00 661.00 784.00 1138.00 6746.00
1988 1609.50 1415.09 b 1009.64 b 598.00 156.00 42.50 3.50 24.00 126.00 654.00 814.50 1334.50 7787.23
1989 1246.00 1438.37 a 1215.50 667.00 302.50 93.50 5.50 14.50 192.00 439.50 1027.50 1680.00 8321.87
1990 1165.00 1178.50 973.50 561.50 378.50 53.00 11.00 26.50 137.50 554.50 759.00 1349.50 7148.00
1991 1611.50 1177.00 974.00 512.00 216.50 6.00 9.00 30.50 232.50 509.50 1038.00 1260.50 7577.00
1992 1281.50 1095.50 1047.50 709.00 267.50 108.50 29.50 66.00 0.00 z 541.50 968.00 1296.50 7411.00
1993 1450.50 1296.50 1105.00 737.50 252.00 94.00 0.00 14.00 285.50 574.00 928.50 1247.50 7985.00
1994 1789.50 1447.50 1018.50 590.50 277.50 47.50 18.00 54.50 105.00 411.00 760.50 1110.00 7630.00
1995 1420.50 1274.00 992.00 745.00 289.00 38.00 13.50 1.00 218.00 481.50 1127.50 1429.00 8029.00
1996 1567.50 1389.50 1235.00 730.50 406.00 67.00 10.00 12.00 175.50 473.00 1098.00 1348.00 8512.00
1997 1560.00 1177.50 1070.00 661.00 448.00 29.50 22.00 51.50 126.50 488.50 958.50 1132.50 7725.50
1998 1343.00 942.00 973.00 510.50 112.50 102.00 0.00 0.00 64.50 414.00 748.00 1098.00 6307.50
1999 1573.00 1016.00 968.50 493.50 185.50 55.00 0.00 9.50 170.50 494.50 654.50 1238.00 6858.50
2000 1465.50 1105.50 766.50 609.50 219.00 69.83 a 13.00 11.00 175.86 a 369.50 893.50 1627.50 7326.19
2001 1343.00 1280.50 1097.00 486.50 207.50 97.24 a 11.50 3.50 189.83 a 515.12 a 588.50 1062.50 6882.69
2002 1160.50 924.00 1069.50 550.50 361.00 43.00 0.00 0.00 81.50 580.50 873.00 1150.00 6793.50
2003 1511.50 1368.00 1032.50 624.50 260.50 54.50 4.00 0.50 149.50 474.50 852.00 1125.00 7457.00
2004 1600.50 1212.50 878.50 539.50 326.00 84.50 15.50 76.50 58.50 432.50 749.50 1293.00 7267.00
2005 1508.50 1071.00 1111.50 472.00 304.00 7.00 3.50 3.50 62.50 405.50 816.50 1398.00 7163.50
2006 1066.50 1234.50 968.50 411.50 258.00 29.50 0.50 0.00 187.50 597.00 749.00 1106.50 6609.00
2007 1270.50 1424.00 897.00 596.50 164.00 27.00 1.00 10.50 136.50 329.00 894.50 1388.00 7138.50
2008 1472.50 1445.34 a 1170.50 584.50 312.50 31.00 3.00 4.00 98.50 491.50 891.50 1555.00 8059.84
2009 1735.00 1199.50 1058.00 613.00 222.50 83.00 22.00 31.00 71.50 627.00 658.00 1343.00 7663.50
2010 1445.50 1184.00 844.00 394.50 217.50 17.50 0.00 2.00 164.00 390.00 784.50 1380.50 6824.00
2011 1544.00 1245.50 1089.50 646.00 313.00 58.50 0.00 0.00 209.50 407.00 781.00 1103.50 7397.50
2012 1303.50 1050.00 565.50 551.50 141.50 30.00 0.00 10.00 177.50 364.50 h 0.00 z 0.00 z 3829.50
Period of Record Statistics
MEAN 1481.45 1269.92 1053.86 601.57 275.99 66.28 10.18 26.06 160.04 474.32 883.31 1320.45 7627.74
S.D. 178.62 145.82 144.90 102.05 88.38 36.57 9.36 22.24 53.02 102.79 113.10 159.55 492.05
SKEW 0.29 0.12 -0.54 0.07 0.05 0.70 1.50 1.38 -0.01 -0.04 0.11 0.21 -0.32
MAX 2028.00 1749.50 1371.50 836.00 488.50 183.00 53.00 125.00 285.50 797.50 1152.50 1706.50 8643.00
MIN 1066.50 924.00 565.50 374.50 77.00 6.00 0.00 0.00 54.50 175.50 588.50 944.31 6307.50
NO YRS 117 118 115 119 118 113 113 114 117 116 113 116 100