date! ,

Monthly Total Heating Degree Days

(a vali)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201302
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 1832.00 1555.50 1248.00 743.00 361.00 0.00 z 1.00 46.50 195.00 597.00 1109.50 1599.50 9288.00
1894 1864.00 1521.00 925.00 538.00 231.00 43.50 0.50 13.50 156.72 a 399.50 f 0.00 z 1231.50 6524.72
1895 1867.50 1486.50 1137.50 337.00 279.50 86.00 26.00 27.50 192.50 661.50 1092.00 1410.00 8603.50
1896 1464.00 1229.50 0.00 z 0.00 z 201.00 93.00 27.42 e 39.50 240.50 653.00 1471.55 a 1323.00 6742.47
1897 1781.00 0.00 z 1353.00 614.50 292.50 158.50 4.65 a 58.50 48.89 c 485.00 1115.50 1538.50 7450.54
1898 1309.00 1231.00 1038.00 581.50 324.43 b 58.00 9.50 12.00 158.50 724.50 1155.50 1514.50 8116.43
1899 1509.00 1694.54 b 1414.00 504.83 a 231.50 36.00 9.00 7.00 243.50 482.00 743.50 1453.79 b 8328.66
1900 1363.00 1532.50 1076.50 409.50 134.00 27.00 11.00 0.50 0.00 z 0.00 z 761.00 1180.50 6495.50
1901 1424.50 1331.00 1041.50 545.00 282.00 126.00 2.00 9.00 254.50 470.50 1070.00 1575.50 8131.50
1902 1388.50 1306.67 a 947.50 643.00 212.50 200.50 25.00 76.00 342.50 449.50 964.50 0.00 z 6556.17
1903 0.00 z 1064.00 g 985.00 516.50 222.17 a 82.50 29.93 b 42.88 a 213.00 270.50 l 1006.67 c 1494.95 b 4593.60
1904 1732.38 a 1633.00 1042.63 a 720.58 d 253.68 a 113.50 12.73 c 30.00 147.41 a 403.50 767.50 1384.31 b 8241.23
1905 1797.50 1544.50 810.98 c 575.69 a 374.87 d 96.60 e 21.00 0.00 80.36 b 611.73 a 830.89 b 1207.89 c 7952.02
1906 1294.52 b 1216.38 b 1305.10 a 311.50 i 268.00 108.00 39.27 a 22.96 d 141.43 b 580.22 a 1050.00 a 1426.00 7451.88
1907 1860.00 a 1256.23 b 965.81 b 595.00 i 496.00 a 120.54 b 13.50 32.55 a 224.00 516.09 d 945.00 1246.50 7676.22
1908 1352.50 1369.00 1020.42 a 515.00 298.93 c 103.33 c 20.00 55.00 110.69 a 589.00 922.50 1404.96 c 7761.33
1909 1077.00 j 882.00 g 1142.50 800.19 d 318.27 a 71.90 a 25.83 a 10.33 a 179.42 d 616.42 e 919.44 c 1321.00 g 4084.31
1910 1694.67 d 1579.67 d 586.79 c 523.33 c 443.76 d 112.50 g 0.00 z 49.60 a 193.39 b 373.50 0.00 z 1465.50 6910.21
1911 1653.33 a 1337.00 b 869.50 649.66 a 214.79 c 14.00 f 26.00 81.93 c 196.00 f 682.00 1025.00 f 1201.00 f 5514.20
1912 2074.42 a 1516.06 b 1375.88 a 566.38 a 339.85 d 123.50 i 20.50 h 42.33 e 357.41 a 379.50 h 886.07 b 1349.10 e 8507.50
1913 1562.40 a 1426.88 c 1187.62 b 569.00 382.73 e 39.50 f 22.50 9.82 a 222.12 d 0.00 z 663.00 f 1203.46 c 6586.53
1914 1386.39 d 0.00 z 1098.84 c 592.50 d 310.50 29.50 i 7.00 89.38 a 207.22 c 463.97 a 876.00 e 973.50 m 5031.80
1915 0.00 z 1193.77 b 1356.25 e 410.36 b 511.50 e 135.00 f 101.27 a 117.59 b 229.66 a 496.53 b 640.50 i 893.50 k 4416.92
1916 1987.88 c 0.00 z 901.00 f 687.86 b 341.00 c 124.44 c 0.00 43.50 252.93 a 666.50 c 0.00 z 0.00 z 4104.11
1917 0.00 z 1610.00 b 1165.37 d 699.50 411.02 b 131.50 26.35 a 41.85 a 0.00 z 0.00 z 739.04 d 1721.10 e 6545.72
1918 1906.00 1355.31 b 777.21 c 721.50 243.87 a 38.50 f 25.32 a 16.02 a 300.56 c 458.44 e 0.00 z 0.00 z 5804.22
1919 1283.52 e 1447.19 a 1037.93 d 622.78 c 322.92 a 59.50 h 0.00 17.05 a 139.50 745.66 c 0.00 z 0.00 z 5616.54
1920 0.00 z 0.00 z 0.00 z 0.00 z 169.50 l 101.67 c 18.48 e 54.77 a 168.50 371.47 b 1082.78 c 1432.20 a 3229.86
1921 1290.38 c 1042.00 864.50 501.43 b 259.50 28.85 d 5.17 a 36.34 b 143.57 b 440.20 a 1098.89 c 1345.29 b 7056.11
1922 1190.50 h 1628.31 b 1051.70 d 564.44 c 266.82 c 38.08 d 52.38 b 12.92 a 56.38 a 393.70 a 45.50 z 1502.00 5566.73
1923 1358.32 a 1393.28 c 317.00 u 471.50 f 252.77 e 61.03 a 0.00 29.28 d 100.50 575.50 794.50 1137.59 c 5702.77
1924 1771.28 b 1210.23 a 1125.41 c 558.75 b 444.52 c 121.07 b 19.78 b 20.31 b 237.12 d 185.50 m 957.12 d 1710.68 a 8176.26
1925 1680.72 a 1184.30 a 0.00 z 252.50 h 341.57 d 58.20 e 25.12 b 0.00 r 87.41 a 695.00 i 753.00 f 1465.78 a 4843.10
1926 1549.47 b 1116.37 a 1093.27 a 513.62 a 148.80 a 101.79 b 8.02 b 6.72 a 271.20 e 537.52 c 1171.00 1507.63 a 8025.39
1927 1061.50 h 1155.26 a 956.00 621.72 a 366.66 b 117.86 b 18.50 f 63.03 a 216.35 d 300.50 f 1159.66 a 1868.86 c 6525.39
1928 1515.12 c 1230.95 a 917.27 c 802.78 c 192.41 b 72.32 b 7.75 c 12.73 c 229.44 c 533.50 981.11 c 1161.50 7656.89
1929 1931.00 1571.77 b 1007.50 580.00 374.00 136.00 14.00 16.50 326.00 0.00 z 1126.00 1440.47 a 8523.24
1930 1880.50 0.00 z 958.23 c 457.00 286.50 52.00 5.00 0.00 151.50 561.50 854.00 1223.50 6429.73
1931 1160.50 887.00 978.50 473.50 338.00 17.14 b 1.00 10.00 82.50 383.00 862.50 1221.50 6415.14
1932 1560.00 1244.85 b 1290.63 a 503.00 186.50 7.50 9.00 5.00 134.00 559.50 1005.50 1493.17 a 7998.65
1933 1165.94 d 1396.00 981.00 556.07 b 279.00 a 16.50 0.50 4.50 54.00 476.50 897.93 a 1363.48 a 7191.43
1934 1290.50 1152.67 a 1006.98 a 521.38 a 57.00 5.00 l 0.00 27.38 a 233.79 a 330.50 791.25 b 1458.55 a 6870.01
1935 1572.50 1004.00 904.50 687.00 412.00 124.29 b 0.00 51.67 a 131.54 d 546.12 a 1092.00 1411.50 7937.11
1936 1972.00 2008.00 996.65 a 687.00 122.50 43.45 a 0.00 1.00 97.00 577.50 1032.41 a 1321.12 a 8858.63
1937 1970.00 1410.89 a 1086.50 645.00 173.50 86.50 4.50 1.50 148.00 562.00 1039.00 1513.00 8640.39
1938 0.00 z 1422.30 a 837.50 505.86 a 295.00 23.00 0.00 0.00 74.50 238.70 a 1029.50 1269.00 5695.36
1939 1300.00 1520.17 d 972.00 584.50 82.00 34.00 0.00 a 8.00 138.50 471.72 a 804.50 1070.00 6985.38
1940 1845.00 1328.00 1179.50 612.50 257.00 50.50 2.50 30.50 102.00 266.50 1130.00 1277.50 8081.50
1941 1484.00 1341.00 1081.00 444.00 124.00 71.00 19.00 15.50 149.50 445.00 845.00 1123.50 7142.50
1942 1344.00 1192.00 938.00 380.00 350.00 52.50 14.00 15.00 279.00 460.50 895.50 1474.00 7394.50
1943 1747.00 1131.00 1188.50 480.00 332.50 80.00 2.00 10.50 186.00 420.50 983.50 1231.00 7792.50
1944 1172.50 1301.00 1233.00 662.50 175.00 71.00 3.50 28.50 145.00 404.00 882.00 1313.88 a 7391.88
1945 1450.00 1155.26 a 797.00 628.97 a 376.00 178.50 25.50 11.50 213.50 455.00 1017.93 a 1011.00 l 6309.16
1946 1488.60 e 1215.50 715.00 345.00 b 335.26 d 90.52 a 7.00 54.50 174.00 527.50 1077.12 d 1306.00 7335.99
1947 1308.50 1401.00 882.50 h 682.24 a 348.23 a 80.56 c 10.00 0.00 169.14 a 242.83 a 1129.00 1443.50 6815.00
1948 1620.50 1408.50 1092.00 377.50 253.50 64.50 2.00 14.50 72.50 476.88 a 963.50 1393.34 c 7739.22
1949 1680.50 1406.00 1040.00 499.29 b 147.00 13.00 g 2.50 12.29 b 216.00 472.50 730.50 1391.00 7597.58
1950 1847.50 1257.50 1250.00 805.18 b 369.50 79.50 26.87 a 43.63 d 142.76 a 387.50 1048.50 1449.52 b 8707.95
1951 1576.87 a 1145.50 1380.50 703.00 212.19 b 127.24 a 29.97 a 22.73 a 278.89 c 539.50 1100.50 1583.67 b 8700.56
1952 1620.00 1162.59 a 1217.00 443.08 d 223.00 10.00 3.00 0.00 116.00 556.50 917.14 b 1235.57 c 7503.88
1953 1416.00 1186.37 a 969.00 706.00 275.00 36.72 a 1.55 a 4.28 b 122.50 282.00 807.00 1409.50 7215.92
1954 1734.00 842.50 1151.00 478.00 379.00 0.00 z 0.00 b 0.00 113.50 556.50 738.00 1301.50 7294.00
1955 1439.00 1435.50 1079.32 a 305.00 107.50 73.00 0.00 6.00 156.50 427.50 1229.00 1676.50 7934.82
1956 1686.00 1507.50 1125.00 712.50 218.50 14.00 3.50 23.00 157.00 276.00 958.50 1221.00 7902.50
1957 1750.00 1217.50 1062.00 618.62 a 303.00 54.00 0.00 15.00 204.00 527.50 929.50 732.00 j 6681.12
1958 1287.00 1357.50 1093.50 568.00 134.00 95.50 8.50 12.00 97.24 a 368.68 c 898.00 1455.45 a 7375.37
1959 1644.07 b 1429.56 a 873.68 a 486.67 c 219.00 19.50 l 4.65 a 0.00 a 184.29 b 669.82 c 0.00 z 0.00 z 5511.73
1960 0.00 z 0.00 z 0.00 z 375.50 f 230.00 57.00 2.50 4.00 208.50 478.50 874.50 1419.50 3274.50
1961 1590.50 1147.00 922.77 a 689.50 315.00 38.79 a 5.00 6.00 253.50 435.50 956.00 1540.00 7899.56
1962 1606.32 a 1334.00 1258.50 599.00 132.50 61.50 19.00 14.50 225.00 419.00 782.50 1312.85 a 7764.67
1963 1832.50 1256.00 850.95 a 402.00 f 243.83 e 19.80 e 0.00 i 15.50 81.21 a 227.50 854.50 1648.50 7030.28
1964 1352.00 1136.00 1183.50 498.00 165.00 37.50 0.00 57.00 173.50 466.00 997.50 1565.00 7631.00
1965 1684.00 1385.00 1385.50 547.00 162.00 14.00 0.00 21.50 398.00 404.00 944.50 1162.50 8108.00
1966 1800.50 1341.50 854.00 709.50 297.50 53.50 0.00 40.50 185.50 492.00 1010.00 1392.00 8176.50
1967 1470.00 1359.00 868.00 549.00 380.00 41.50 35.50 23.50 128.00 526.00 980.00 1344.00 7704.50
1968 1536.00 1359.00 739.00 511.50 372.00 47.50 15.00 15.50 157.00 484.00 959.50 1525.50 7721.50
1969 1777.50 1246.50 1399.50 478.00 200.00 129.00 1.00 4.00 100.00 676.00 929.50 1371.00 8312.00
1970 1842.50 1203.00 1142.00 606.50 164.50 32.50 6.00 1.50 186.50 554.50 1002.50 1509.00 8251.00
1971 1752.50 1322.50 1062.00 485.50 272.50 16.50 29.00 6.50 186.50 436.00 945.00 1458.50 7973.00
1972 1749.50 1465.00 1015.00 574.00 228.50 32.50 24.50 32.50 148.00 592.00 0.00 z 0.00 z 5861.50
1973 1465.50 1190.00 788.00 562.00 256.50 19.00 3.00 0.00 192.50 375.00 947.00 1489.50 7288.00
1974 1570.50 1160.00 935.50 470.50 282.50 64.50 0.00 32.00 205.00 382.50 927.00 1291.00 7321.00
1975 1484.50 1359.50 1203.00 715.00 168.00 48.50 8.00 1.00 223.00 375.00 924.00 1392.00 7901.50
1976 1565.00 1018.50 977.00 391.00 220.50 15.50 1.00 2.00 122.00 646.50 1104.00 1458.55 a 7521.55
1977 1853.05 b 1077.00 907.50 356.00 42.50 4.50 0.00 a 11.00 115.00 513.00 1042.00 1550.50 7472.05
1978 1995.00 1579.00 1039.00 575.50 208.00 49.00 6.00 18.00 89.00 473.50 1025.00 1554.00 8611.00
1979 1993.00 1585.00 1155.50 621.00 304.50 43.50 2.00 26.00 103.50 504.00 998.00 1138.50 8474.50
1980 1496.50 1355.50 1057.50 459.00 182.00 15.00 a 0.00 5.00 94.00 533.00 874.50 1368.43 c 7440.43
1981 1335.50 1110.00 793.60 a 308.50 252.50 13.50 14.00 7.50 112.00 556.00 813.50 1474.50 6791.10
1982 1962.50 1303.00 1017.50 593.00 116.50 86.50 0.00 21.00 194.00 541.00 1056.00 1263.25 a 8154.25
1983 1325.00 1050.00 956.00 701.00 303.50 70.00 5.00 0.00 173.50 492.50 924.50 1987.00 7988.00
1984 1527.00 1044.50 1153.00 549.50 278.00 24.50 2.50 11.00 268.00 380.50 869.00 1436.00 7543.50
1985 1598.00 1280.50 813.50 369.00 109.50 111.00 2.50 24.50 260.00 512.00 1354.50 1777.00 8212.00
1986 1417.22 a 1370.96 a 872.00 521.50 177.00 7.00 0.00 59.33 b 161.38 a 0.00 z 642.50 l 1201.50 5787.89
1987 1260.50 903.00 878.00 340.00 81.50 15.50 4.50 49.50 130.50 668.00 845.00 1329.00 6505.00
1988 1845.57 b 1540.50 985.00 556.50 117.50 3.00 5.50 27.50 149.50 650.00 968.50 1396.60 b 8245.67
1989 1327.00 1664.96 a 1169.00 551.00 235.50 83.00 0.00 7.00 220.50 501.50 1052.07 a 1718.50 8530.03
1990 1194.50 1175.48 a 921.00 638.00 245.50 51.50 23.00 14.00 151.00 503.00 897.50 1606.00 7420.48
1991 1660.00 1024.00 933.50 486.21 a 237.00 6.00 4.00 5.00 194.00 620.00 1235.00 1266.00 7670.71
1992 1251.50 1084.00 883.00 704.50 209.50 60.00 49.50 90.50 244.50 592.50 1119.50 1532.00 7821.00
1993 1676.50 1524.00 1222.43 a 699.00 299.00 127.00 0.00 o 29.50 313.00 606.50 1122.50 1414.00 9033.43
1994 1901.50 1560.50 965.50 609.50 177.50 20.50 32.50 41.00 134.50 461.50 892.50 1367.50 8164.50
1995 1566.50 1236.50 1029.41 b 765.00 336.00 60.00 10.00 7.00 196.00 575.00 1123.00 1333.50 8237.91
1996 1723.00 1272.50 1253.50 671.50 340.50 34.00 13.00 3.50 233.50 509.00 1281.00 1733.00 9068.00
1997 1800.00 1320.00 1139.00 697.50 376.00 7.00 18.50 23.00 117.00 457.50 1109.50 1206.00 8271.00
1998 1434.78 a 927.00 1219.00 525.00 132.00 101.00 0.00 0.00 66.00 442.00 884.00 1194.50 6925.28
1999 1587.00 959.50 898.50 532.00 215.00 57.00 3.50 3.00 203.50 525.50 664.50 1185.00 6834.00
2000 1455.00 984.50 737.50 574.50 195.00 82.00 19.50 11.50 152.50 429.50 1271.50 1842.50 7755.50
2001 1478.00 1535.50 1284.00 530.50 202.00 50.50 1.00 8.50 167.50 513.00 668.00 1316.50 7755.00
2002 1345.00 1037.00 1387.00 565.50 348.50 46.50 0.00 23.50 137.00 799.00 983.50 1217.50 7890.00
2003 1502.50 1329.50 1036.00 521.00 288.00 77.50 0.00 11.50 195.50 467.00 1084.50 1246.00 7759.00
2004 1576.00 1324.00 846.50 525.00 285.50 89.50 23.50 74.00 103.00 493.00 814.00 1260.00 7414.00
2005 1580.00 779.50 g 1025.00 471.00 336.87 a 21.50 13.50 11.50 89.00 475.33 a 877.00 1506.50 6407.20
2006 1096.50 1225.50 1011.00 443.50 271.50 31.50 0.50 5.50 286.00 638.00 973.50 1238.50 7221.50
2007 1463.50 1494.50 884.00 667.50 147.50 43.50 1.00 9.50 170.00 461.50 929.50 1558.50 7830.50
2008 1679.50 1491.50 1150.00 720.00 370.50 52.50 9.50 2.50 160.50 568.50 970.50 1699.50 8875.00
2009 1739.00 1218.50 1092.50 666.00 283.00 127.00 35.00 42.00 112.00 764.00 757.00 1603.00 8439.00
2010 1723.50 1462.50 927.50 402.00 355.00 29.00 0.00 3.00 188.00 428.50 971.50 1535.50 8026.00
2011 1757.70 a 1423.13 e 1184.95 b 660.52 a 299.31 b 63.75 b 0.52 a 7.75 a 243.21 b 457.25 a 929.50 1228.12 a 8255.70
2012 1320.50 1200.00 561.00 455.00 194.50 29.00 0.00 26.50 145.50 589.00 883.50 1358.50 6763.00
2013 1421.50 1268.00 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 2689.50
Period of Record Statistics
MEAN 1584.34 1308.90 1038.72 564.34 260.22 63.31 11.07 22.46 174.70 502.01 970.93 1411.63 7821.25
S.D. 225.76 197.29 174.59 113.31 92.83 41.32 14.50 22.60 68.01 110.74 143.11 174.69 559.03
SKEW 0.04 0.19 0.02 -0.12 0.05 0.75 2.69 1.56 0.59 0.01 0.50 0.62 -0.22
MAX 2074.42 2008.00 1414.00 805.18 511.50 200.50 101.27 117.59 398.00 799.00 1471.55 1987.00 9068.00
MIN 1096.50 842.50 561.00 305.00 42.50 3.00 0.00 0.00 48.89 227.50 664.50 1070.00 6415.14
NO YRS 112 112 113 112 119 107 115 119 117 109 107 108 78