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 1745.00 1445.50 1155.50 640.00 380.50 14.00 o 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5366.50
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 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
1897 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
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 0.00 z 0.00 z 0.00 z 0.00
1899 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
1900 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
1901 0.00 z 0.00 z 0.00 z 577.00 288.50 75.50 7.00 16.50 180.54 b 80.50 y 547.50 o 1443.50 2588.54
1902 1432.00 1312.00 925.00 633.00 300.50 137.50 18.00 57.00 209.50 490.00 723.00 1397.50 7635.00
1903 1529.50 1295.00 891.50 608.50 287.00 113.00 20.50 48.00 m 184.00 228.00 p 977.00 1517.50 7423.50
1904 1692.50 1645.50 1106.50 753.50 264.50 51.50 22.50 54.50 148.00 474.50 781.00 1382.00 8376.50
1905 1673.50 1457.50 1003.00 614.50 362.50 88.00 16.50 18.71 b 89.50 504.50 875.50 1186.50 7890.21
1906 1252.92 a 1289.00 1285.00 540.00 330.50 79.00 0.00 z 0.00 z 76.00 511.00 885.00 1266.00 7514.42
1907 1507.50 1248.00 891.50 854.50 489.00 98.50 11.50 43.50 215.50 558.50 892.50 1240.50 8051.00
1908 1348.50 1300.00 1001.50 586.00 271.50 91.00 17.00 38.00 88.50 430.00 850.50 1333.50 7356.00
1909 1411.00 1155.78 a 1086.50 780.00 350.50 67.00 19.00 17.57 a 203.50 594.54 c 720.00 1488.50 7893.88
1910 1469.52 e 1370.00 709.00 521.11 c 329.00 78.50 0.55 c 10.73 e 147.00 368.50 1046.50 1415.00 7465.42
1911 1489.03 a 1098.50 421.50 r 618.50 157.00 8.50 13.00 25.00 161.00 535.00 1072.50 1143.50 6321.53
1912 2013.00 1461.00 1286.50 575.50 258.50 60.50 16.50 56.50 180.00 346.00 f 842.50 1170.00 7920.50
1913 1413.50 1405.50 1157.00 546.00 297.00 57.00 4.50 9.00 188.50 513.50 770.00 1046.00 7407.50
1914 1252.50 1525.50 1140.59 b 691.50 213.50 94.14 a 6.00 45.50 155.00 332.00 880.34 a 1516.00 7852.57
1915 1529.00 1072.00 1120.00 387.50 430.50 146.00 44.95 a 78.53 a 154.00 462.50 825.00 1300.00 7549.98
1916 1452.00 1516.29 a 1294.00 643.00 304.00 137.50 0.00 33.00 237.00 549.00 944.50 1537.00 8647.29
1917 1652.50 1597.00 1124.50 734.00 451.00 179.00 11.00 58.50 211.50 814.50 882.00 1559.00 9274.50
1918 1871.88 a 1394.50 953.50 749.50 224.50 62.00 41.50 9.00 312.00 436.00 812.50 1093.50 7960.38
1919 1309.50 1198.96 c 1030.23 a 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 3538.69
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 1073.28 a 1490.07 a 2563.34
1927 1592.50 1129.00 974.50 662.50 406.50 155.50 23.50 77.00 187.00 431.00 909.50 1517.50 8066.00
1928 1473.00 1302.00 1119.50 824.50 266.00 142.50 15.00 27.50 251.00 457.50 847.50 1226.50 7952.50
1929 1886.50 1538.50 1007.00 604.50 433.00 141.50 12.00 54.50 187.50 522.00 1015.50 1369.00 8771.50
1930 1725.67 a 1146.00 1100.00 631.50 278.00 55.71 b 8.50 11.00 135.00 537.50 807.50 1302.50 7738.88
1931 1288.00 1032.50 1060.50 594.00 355.00 62.07 a 3.50 37.50 80.00 343.50 659.50 1045.00 6561.07
1932 1215.20 a 1256.00 1253.95 a 702.00 304.50 12.50 25.50 9.50 161.00 557.50 1032.50 1388.50 7918.65
1933 1201.77 a 1375.63 a 1126.00 696.50 281.50 24.00 0.00 23.00 86.00 562.50 1006.00 1377.29 c 7760.18
1934 1273.50 1416.50 1194.00 707.50 174.12 a 26.50 11.00 93.00 193.00 428.50 771.00 1423.00 7711.62
1935 1603.73 a 1209.50 1018.50 719.00 425.00 136.50 0.00 42.00 176.00 497.50 931.00 1358.50 8117.23
1936 1649.50 1773.50 1047.28 a 803.50 162.50 69.50 0.00 7.23 a 96.21 a 565.50 1007.07 a 1217.00 8398.79
1937 1565.50 1302.50 1145.50 692.50 265.00 62.00 4.50 8.00 189.83 a 582.00 955.00 1376.00 8148.33
1938 1498.50 1146.50 904.50 581.50 270.00 39.50 3.00 5.50 144.50 324.50 829.00 1299.50 7046.50
1939 1319.50 1378.50 1102.50 714.50 205.50 46.00 0.00 2.50 135.50 494.50 838.50 1040.00 7277.50
1940 1635.50 1235.00 1195.00 701.00 329.50 49.50 18.00 57.00 137.00 393.00 944.00 1249.50 7944.00
1941 1341.00 1295.00 1206.50 451.50 160.00 61.00 10.50 18.00 121.50 440.00 822.50 1099.50 7027.00
1942 1427.03 a 1286.50 961.50 465.50 317.50 72.50 17.00 29.00 262.50 487.00 955.00 1483.00 7764.03
1943 1622.00 1300.50 1279.50 700.00 314.00 68.00 0.00 9.50 253.00 493.00 1014.50 1316.00 8370.00
1944 1238.50 1260.00 1204.00 740.50 220.00 44.00 7.50 13.00 156.50 521.50 791.79 b 1459.50 7656.79
1945 1588.00 1302.50 743.00 574.50 409.50 150.00 16.50 17.00 215.50 558.00 933.50 1499.00 8007.00
1946 1416.50 1294.50 810.00 526.00 331.50 124.00 1.00 36.00 165.50 354.00 814.50 1246.50 7120.00
1947 1311.50 1329.50 1114.97 a 688.00 441.23 a 120.54 b 13.36 b 3.50 152.59 a 206.67 a 1020.00 a 1323.00 7724.85
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 58.00 5.00 5.00 96.50 506.50 764.50 1292.50 2728.00
1949 1355.50 1283.50 1092.00 595.00 260.50 35.50 1.00 21.00 250.50 374.00 872.50 1240.00 7381.00
1950 1464.00 1281.50 1205.50 846.50 316.50 82.24 a 29.00 99.50 166.55 a 378.50 1048.50 1521.50 8439.79
1951 1598.00 1279.00 1179.50 686.50 205.50 75.50 13.50 41.00 223.00 502.00 1142.00 1405.00 8350.50
1952 1441.00 1182.00 1145.00 518.50 297.00 42.50 2.50 17.00 166.00 663.40 a 810.50 1182.50 7467.90
1953 1331.50 1224.50 1010.50 692.00 284.50 33.00 6.00 1.00 153.50 328.00 740.50 1202.00 7007.00
1954 1457.50 991.00 1089.00 556.50 413.50 61.00 9.50 26.35 a 159.00 502.50 805.50 1239.50 7310.85
1955 1459.00 1257.50 1139.50 426.00 193.50 51.00 0.00 a 11.00 141.72 a 408.00 1017.00 1445.00 7549.22
1956 1400.00 1297.00 1191.50 707.00 340.00 45.00 14.98 a 25.32 a 219.00 283.00 911.00 1269.50 7703.30
1957 1649.50 1152.00 1029.00 563.50 332.50 54.00 2.00 21.50 192.00 514.00 912.50 1215.50 7638.00
1958 1369.17 a 1361.50 1000.00 587.00 294.00 142.50 6.50 37.50 157.00 409.50 845.50 1514.00 7724.17
1959 1687.50 1402.00 1161.00 602.00 162.50 25.00 4.50 1.50 143.00 604.00 1130.50 1086.50 8010.00
1960 1331.00 1242.00 1326.00 562.50 320.50 61.00 15.50 14.50 168.00 492.50 830.00 1399.00 7762.50
1961 1494.50 1063.00 976.50 704.50 339.97 a 56.00 2.00 8.00 170.50 424.00 891.50 1421.50 7551.97
1962 1662.00 1376.00 1107.50 639.50 201.00 72.50 14.50 7.00 216.50 427.50 848.50 1394.50 7967.00
1963 1798.00 1477.50 1054.00 541.00 333.00 45.00 2.50 32.00 146.50 187.00 740.00 1553.00 7909.50
1964 1285.50 1176.00 1095.50 574.00 139.50 85.50 12.50 62.00 216.00 523.00 808.50 1425.00 7403.00
1965 1558.00 1342.50 1245.50 713.00 193.00 59.50 17.50 51.50 226.00 480.50 880.50 1093.50 7861.00
1966 1671.00 1223.00 968.50 674.00 412.50 57.00 0.00 z 34.50 183.00 503.50 902.50 1339.50 7969.00
1967 1409.00 1427.00 1064.00 617.50 442.50 34.00 31.50 67.50 178.50 540.50 982.00 1267.50 8061.50
1968 1454.50 1386.50 839.00 532.00 334.00 71.00 20.50 40.50 109.00 428.50 880.50 1340.50 7436.50
1969 1538.50 1173.50 1170.00 586.50 287.50 188.00 26.00 1.50 174.50 567.00 921.50 1280.50 7915.00
1970 1683.50 1311.00 1107.00 568.00 292.00 55.50 10.50 10.50 154.00 401.50 888.50 1336.50 7818.50
1971 1700.50 1302.50 1163.00 655.00 336.50 39.50 24.50 32.00 123.50 296.50 880.00 1232.50 7786.00
1972 1676.00 1417.50 1229.00 764.50 215.50 100.50 33.00 45.00 169.50 593.00 911.00 1454.50 8609.00
1973 1351.50 1174.00 796.50 650.50 378.00 9.50 0.50 11.00 166.50 311.50 883.00 1319.50 7052.00
1974 1446.00 1276.50 1052.00 591.50 385.50 104.00 0.50 19.00 275.50 506.50 846.00 1190.50 7693.50
1975 1361.50 1256.50 1214.50 776.50 190.00 74.50 21.00 10.00 248.00 415.00 714.50 1319.00 7601.00
1976 1628.00 1137.50 1019.00 552.00 337.00 14.50 0.50 31.00 211.50 632.50 1114.00 1643.00 8320.50
1977 1874.00 1218.00 854.00 466.00 112.00 85.00 1.00 40.50 128.50 503.00 917.00 1402.50 7601.50
1978 1620.00 1411.00 1155.00 709.00 261.50 79.00 24.00 5.50 121.50 504.50 919.50 1422.00 8232.50
1979 1796.00 1502.50 1106.00 728.50 343.00 68.50 7.00 34.50 127.00 567.00 931.00 1142.50 8353.50
1980 1473.50 1360.00 1165.50 574.00 196.00 91.00 3.50 11.00 152.50 620.00 866.50 1375.00 7888.50
1981 1474.50 1137.50 910.50 534.50 280.55 a 15.50 9.00 8.00 218.00 607.50 799.50 1304.50 7299.55
1982 1758.73 a 1322.50 1119.00 705.00 133.00 127.00 0.00 54.00 219.00 457.00 0.00 z 0.00 z 5895.23
1983 1309.50 1050.50 1006.00 687.00 414.00 69.00 7.23 a 1.00 180.50 480.00 830.00 1659.53 a 7694.27
1984 1573.50 1038.50 1207.50 575.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4394.50
1985 0.00 z 1346.00 899.00 476.00 134.00 72.50 2.00 21.00 153.50 453.63 a 1033.50 1709.50 6300.63
1986 1478.18 a 1294.00 966.50 461.00 205.50 60.50 2.50 37.50 155.00 484.50 1029.00 1245.50 7419.68
1987 1335.00 1008.50 903.00 445.00 201.50 20.00 5.00 23.50 98.50 632.50 797.00 1137.00 6606.50
1988 1606.50 1440.00 1004.00 568.50 170.00 48.00 3.00 10.50 113.00 645.00 818.00 1354.00 7780.50
1989 1219.00 1459.50 1205.00 657.50 277.00 76.50 3.50 8.00 170.00 457.50 1013.00 1682.00 8228.50
1990 1182.00 1191.50 942.00 521.50 345.00 39.00 11.00 17.00 135.50 525.50 738.50 1365.50 7014.00
1991 1598.00 1155.00 957.00 490.00 199.50 15.00 14.00 10.50 227.00 509.00 1049.50 1249.00 7473.50
1992 1306.00 1093.00 1059.50 668.00 242.50 104.00 28.00 71.50 194.00 566.00 975.50 1290.50 7598.50
1993 1412.00 1304.00 1093.00 711.00 270.00 117.50 1.50 26.00 327.00 614.00 974.00 1278.50 8128.50
1994 1859.00 1448.50 1031.50 646.00 282.00 59.50 27.00 63.00 122.50 473.50 820.50 1161.50 7994.50
1995 1404.50 1295.00 992.50 758.50 316.50 53.00 10.50 1.00 245.00 517.00 1166.50 1455.50 8215.50
1996 1613.00 1379.00 1251.50 776.00 429.50 98.50 25.50 12.00 208.00 556.00 1115.50 1377.00 8841.50
1997 1564.50 1194.50 1078.50 672.50 478.50 47.00 33.00 77.00 167.00 518.50 1002.50 1162.00 7995.50
1998 1335.00 942.50 1027.50 536.50 152.50 117.50 0.50 5.00 86.50 459.00 796.50 1177.50 6636.50
1999 1570.50 1059.50 984.50 551.50 202.50 89.50 0.00 26.50 202.00 548.00 726.00 1254.50 7215.00
2000 1477.00 1102.00 796.50 649.50 255.50 88.00 26.50 21.50 153.89 c 413.50 943.00 1667.50 7594.39
2001 1368.28 b 1331.62 b 1104.00 490.00 219.50 84.50 8.00 7.00 202.50 544.05 a 661.00 1137.50 7157.94
2002 1243.00 1092.00 1203.50 619.00 431.00 67.00 2.50 8.50 113.50 683.50 965.50 1205.50 7634.50
2003 1537.00 1401.00 1102.50 673.50 315.00 82.50 8.50 4.00 171.50 513.50 879.00 1165.00 7853.00
2004 1631.00 1258.00 919.50 601.50 358.00 104.50 30.50 104.00 70.00 477.00 786.50 1316.50 7657.00
2005 1505.50 1103.00 1141.00 527.00 371.50 25.50 14.00 19.00 110.50 472.50 814.80 e 1440.50 7544.80
2006 1105.50 1297.50 1029.00 496.00 305.00 69.00 5.50 13.50 230.00 651.50 798.00 1139.00 7139.50
2007 1307.00 1448.00 949.00 648.50 218.50 37.00 9.50 23.50 119.00 337.50 869.50 1358.50 7325.50
2008 1429.58 e 1407.00 1141.00 585.00 335.00 36.00 5.00 15.00 103.50 498.50 884.50 1533.00 7973.08
2009 1694.50 1191.00 1043.00 634.50 264.00 103.00 35.00 47.00 102.50 646.00 690.00 1327.00 7777.50
2010 1408.50 1169.50 860.50 416.00 232.00 28.50 1.50 5.00 226.00 457.00 835.50 1380.00 7020.00
2011 1535.50 1263.00 1123.50 697.50 361.50 91.00 0.00 2.00 248.00 448.50 795.00 1128.50 7694.00
2012 1289.50 1064.00 595.50 591.00 173.50 49.00 3.00 21.00 220.50 392.50 h 0.00 z 0.00 z 4007.00
Period of Record Statistics
MEAN 1495.87 1282.21 1061.42 623.70 291.89 73.19 11.45 27.66 171.41 488.65 890.33 1331.07 7745.83
S.D. 178.27 147.71 135.91 98.18 87.04 38.25 10.54 23.50 51.78 100.89 110.62 150.00 483.18
SKEW 0.36 0.27 -0.67 -0.03 0.09 0.71 0.96 1.20 0.33 -0.22 0.32 0.27 0.15
MAX 2013.00 1773.50 1326.00 854.50 489.00 188.00 44.95 104.00 327.00 814.50 1166.50 1709.50 9274.50
MIN 1105.50 942.50 595.50 387.50 112.00 8.50 0.00 1.00 70.00 187.00 659.50 1040.00 6561.07
NO YRS 103 104 103 104 103 103 101 101 103 99 101 102 93