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
1894 1391.50 1318.50 845.50 507.00 e 333.00 35.56 c 5.17 a 22.50 120.00 199.50 q 798.50 h 1146.43 d 5725.15
1895 1637.50 1457.50 1116.00 545.40 e 273.04 e 30.50 15.50 a 16.00 118.39 b 540.00 h 1022.59 a 1311.54 e 7543.96
1896 1411.57 b 1261.50 b 1154.50 473.50 125.00 48.50 1.00 32.50 274.44 c 612.00 1004.46 b 1234.50 7633.48
1897 1416.50 1184.30 a 1168.00 654.31 a 359.71 b 141.43 b 6.00 63.07 b 67.50 b 350.50 993.62 a 1510.50 7915.43
1898 1287.00 1195.50 871.44 d 588.33 c 267.00 34.14 a 18.50 i 33.50 103.00 563.50 915.50 1481.00 7339.92
1899 1025.50 l 1510.38 b 1329.50 491.00 238.00 26.25 b 3.00 10.69 b 280.18 b 0.00 z 739.29 b 1319.10 b 5947.39
1900 1377.20 d 1397.41 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 136.00 203.00 995.17 a 0.00 z 4108.78
1901 0.00 z 0.00 z 0.00 z 391.50 f 304.50 98.00 8.00 17.00 200.50 484.12 a 1001.50 748.00 n 2113.62
1902 1187.50 f 1339.85 a 947.00 646.73 d 310.53 b 139.00 f 23.00 61.50 263.28 a 516.67 a 551.00 g 1441.50 5550.06
1903 1533.00 1331.12 c 871.62 a 627.50 246.00 97.50 b 19.00 h 90.00 191.50 528.72 d 1038.50 1636.36 c 8191.82
1904 1766.00 1711.52 a 1128.18 c 771.00 280.50 61.03 a 22.70 c 51.00 159.00 502.00 803.00 1409.50 8665.43
1905 1682.78 a 1491.00 1013.00 618.75 b 359.08 a 88.50 15.50 14.50 94.00 542.00 903.00 1203.32 a 8025.43
1906 1240.52 a 1257.93 a 1257.57 a 542.68 b 328.00 67.00 18.71 b 11.50 91.00 505.50 881.00 1265.32 a 7466.71
1907 1507.00 1268.50 931.55 a 893.50 488.00 105.50 11.50 44.50 219.83 a 580.00 927.50 1264.00 8241.38
1908 1369.17 a 901.00 j 1019.00 611.50 272.80 a 95.00 14.00 35.28 b 88.00 437.62 a 837.50 1102.00 f 4779.86
1909 1396.50 1162.00 1128.40 a 794.00 352.50 84.00 22.73 a 14.50 218.33 c 620.55 c 327.00 n 1513.66 b 7307.18
1910 1542.80 c 1399.48 a 695.43 a 201.50 s 340.00 f 81.00 n 2.50 5.00 x 191.79 b 49.00 w 0.00 z 0.00 z 3832.00
1911 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
1912 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
1913 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
1914 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
1915 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
1916 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
1917 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
1918 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
1919 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
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 0.00 z 0.00 z 0.00
1927 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
1928 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
1929 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
1930 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
1931 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
1932 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
1933 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
1934 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
1935 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
1936 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
1937 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
1938 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
1939 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
1940 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
1941 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
1942 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
1943 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
1944 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 131.50 456.73 a 712.24 a 1427.00 2727.47
1945 1579.50 1260.50 718.50 551.67 c 415.92 a 186.00 27.79 b 21.50 196.50 535.00 896.38 a 1474.00 7863.26
1946 1380.00 1291.00 748.00 521.50 363.50 136.50 11.76 b 46.00 155.00 361.15 a 809.00 1219.00 7042.41
1947 1305.00 1356.44 a 1099.98 a 658.50 447.00 141.50 25.00 7.50 177.00 142.00 f 0.00 z 1314.40 a 6532.33
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 51.96 b 6.50 13.00 96.00 449.50 688.00 1250.50 2555.46
1949 1348.00 1244.50 1042.00 580.50 259.50 37.00 4.00 17.50 206.00 350.50 870.00 1225.00 7184.50
1950 1406.00 1269.00 1199.50 815.50 317.00 68.00 28.50 104.50 159.50 351.50 1009.00 1540.50 8268.50
1951 1567.00 1267.00 1165.50 657.50 186.00 99.00 12.50 44.50 217.50 450.50 1113.50 1373.00 8153.50
1952 1404.50 1153.00 1146.00 487.00 284.00 43.50 7.23 a 24.50 150.00 612.50 800.00 1185.50 7297.73
1953 1293.22 a 1203.48 a 1007.00 683.50 285.50 35.50 12.00 6.20 a 138.00 311.50 717.00 1176.50 6869.40
1954 1435.50 983.00 1089.00 510.00 436.00 63.00 11.00 g 37.50 133.00 468.00 793.50 1263.50 7212.00
1955 1461.50 1244.00 1101.00 392.00 197.50 59.00 0.50 7.00 136.00 383.50 1007.00 1438.50 7427.50
1956 1393.00 1269.00 1200.50 672.50 326.00 61.00 19.50 25.50 215.50 285.00 864.50 1224.00 7556.00
1957 1613.55 a 1119.50 1018.50 558.00 322.50 56.50 2.50 17.00 186.50 526.00 883.50 1179.50 7483.55
1958 1382.50 1380.50 1009.50 569.50 273.50 127.00 14.00 26.00 141.50 377.54 c 812.50 1522.00 7636.04
1959 1675.00 1395.00 1193.50 588.50 153.97 a 39.00 20.50 0.00 137.07 a 571.50 1116.50 1080.00 7970.54
1960 1305.00 1268.00 1379.00 526.00 300.50 76.00 30.50 12.00 142.76 a 462.00 761.00 1346.50 7609.26
1961 1446.50 1051.00 929.50 678.00 336.50 63.50 8.50 18.00 136.50 381.00 847.00 1382.50 7278.50
1962 1619.00 1355.00 1102.50 598.00 183.00 76.50 19.00 20.50 211.00 401.50 839.50 1351.00 7776.50
1963 1754.00 1452.50 1040.50 502.00 325.00 47.00 12.50 41.00 161.00 193.00 710.00 1540.50 7779.00
1964 1257.00 1182.50 1087.50 539.00 159.50 87.50 6.00 61.00 201.00 523.00 762.50 1378.50 7245.00
1965 1512.00 1309.00 1238.50 694.50 166.00 85.50 24.00 40.50 176.50 434.50 835.50 1068.50 7585.00
1966 1666.50 1233.00 918.50 668.00 416.00 71.00 6.00 37.50 191.00 465.50 846.00 1307.00 7826.00
1967 1372.50 1360.50 1027.50 575.50 431.00 34.00 37.00 54.00 174.00 494.00 932.00 1211.50 7703.50
1968 1403.00 1375.50 784.00 534.00 349.00 69.00 24.00 57.00 97.50 411.00 852.00 1286.00 7242.00
1969 1537.60 a 1194.50 1163.50 0.00 z 270.50 196.00 26.50 6.00 179.50 537.50 908.00 1289.50 7309.10
1970 1676.50 1261.00 1109.00 546.50 259.50 63.50 10.00 10.50 133.50 393.50 889.00 1310.00 7662.50
1971 1640.00 1272.50 1182.50 594.00 348.50 50.50 13.50 45.50 109.50 251.00 849.00 1208.00 7564.50
1972 1588.50 1380.50 1192.00 719.50 198.50 87.50 12.00 t 36.00 177.00 577.00 901.00 1431.00 8288.50
1973 1315.50 1185.50 790.50 659.00 379.00 20.00 2.50 15.50 176.50 296.50 867.50 1320.00 7028.00
1974 1436.00 1277.50 1039.00 541.50 369.50 93.00 1.50 15.00 257.00 456.50 817.50 1178.50 7482.50
1975 1365.00 1258.50 1197.50 771.00 173.50 50.50 21.50 10.00 220.50 370.50 691.00 1289.50 7419.00
1976 1569.00 1123.50 945.50 529.00 350.00 20.00 0.00 40.50 210.00 624.00 1069.00 1618.50 8099.00
1977 1880.50 1203.50 817.00 431.00 101.00 105.50 7.00 56.00 119.00 508.50 874.50 1409.00 7512.50
1978 1633.50 1467.00 1150.50 674.50 275.00 64.50 29.00 10.50 128.79 a 495.00 882.50 1423.00 8233.79
1979 1787.50 1511.50 1082.50 700.50 352.50 77.50 11.00 37.50 99.00 546.00 882.00 1125.00 8212.50
1980 1451.50 1362.50 1146.50 552.00 202.00 101.50 4.50 11.00 157.50 609.00 839.50 1326.00 7763.50
1981 1460.50 790.50 k 0.00 z 410.00 f 302.50 29.00 25.12 b 0.00 z 27.00 s 411.00 k 840.00 1289.50 3946.62
1982 1771.00 1323.00 1111.50 753.00 59.50 q 0.00 z 0.00 z 27.50 x 223.50 421.00 870.00 1056.50 7529.50
1983 1299.50 1032.50 984.00 673.00 457.50 66.50 9.50 2.00 180.00 476.00 818.50 1656.00 7655.00
1984 1557.50 990.00 1202.00 587.50 342.00 22.50 19.00 19.00 213.00 431.00 860.50 1202.00 7446.00
1985 1591.50 1279.00 880.50 458.50 179.50 94.50 7.50 36.50 160.50 471.00 960.50 1641.00 7760.50
1986 1451.50 1256.50 908.50 435.50 199.50 66.00 9.50 37.00 142.00 460.00 980.50 1238.50 7185.00
1987 1300.00 985.00 866.00 461.79 b 182.50 21.00 12.50 26.00 94.00 609.50 762.50 1139.50 6460.29
1988 1543.00 1378.00 961.00 542.00 166.50 42.41 a 5.50 12.40 a 117.50 626.50 848.50 1327.50 7570.81
1989 1237.00 1474.50 1278.23 a 661.00 322.00 90.00 15.00 25.50 199.00 472.50 1011.50 1671.00 8457.23
1990 1162.00 1178.00 927.00 576.50 387.00 61.00 53.00 41.50 161.50 569.50 798.50 1378.50 7294.00
1991 1620.50 1178.50 978.00 529.00 203.00 29.00 15.00 24.00 242.00 547.50 1041.00 1295.50 7703.00
1992 1311.00 1110.50 1069.00 713.00 292.00 124.50 55.50 85.00 241.00 570.50 971.00 1289.50 7832.50
1993 1452.50 1290.50 1122.50 767.00 284.50 109.00 4.50 17.50 297.00 599.50 936.00 1251.00 8131.50
1994 1799.00 1447.00 1041.50 619.00 307.50 69.00 28.00 58.00 110.00 455.50 791.00 1133.00 7858.50
1995 1423.00 1283.00 985.50 757.00 327.50 37.50 13.00 0.00 243.00 475.00 1148.00 1452.50 8145.00
1996 1578.00 1387.00 1221.50 758.00 448.50 82.50 23.50 19.00 187.50 515.50 1095.00 1340.50 8656.50
1997 1561.50 1200.00 1070.50 664.00 508.00 63.00 33.50 69.50 148.00 517.50 969.00 1143.00 7947.50
1998 1351.50 945.00 995.50 540.50 161.50 97.50 3.50 2.50 67.50 432.00 746.00 1101.50 6444.50
1999 1594.50 1018.00 985.50 515.00 205.00 66.50 0.00 30.50 185.00 533.00 698.50 1251.00 7082.50
2000 1476.50 1133.00 788.00 655.00 235.08 a 62.00 19.50 19.50 202.50 366.50 883.50 1608.90 a 7449.98
2001 1357.50 1289.00 1100.00 487.50 215.50 100.50 13.00 2.50 209.50 509.00 628.50 1081.50 6994.00
2002 1214.00 1048.50 1170.50 624.50 436.00 69.50 5.00 8.00 91.50 624.00 932.50 1204.50 7428.50
2003 1533.50 1396.50 1074.50 693.00 350.00 106.00 12.00 5.50 179.50 511.00 873.00 1140.50 7875.00
2004 1629.50 0.00 z 913.00 599.00 354.50 91.50 28.00 91.50 66.50 450.00 771.50 1296.50 6291.50
2005 1498.50 1091.00 1129.00 511.50 345.00 24.50 11.50 17.50 74.00 442.50 841.00 1421.00 7407.00
2006 1085.00 1266.00 1003.50 467.00 288.00 56.50 4.50 7.00 214.00 608.50 739.50 1099.00 6838.50
2007 1267.50 1425.50 911.00 629.50 210.50 36.50 10.00 19.00 132.50 335.00 908.00 1387.00 7272.00
2008 1469.00 1474.00 1190.00 591.50 369.50 50.50 6.50 18.00 127.00 526.00 880.50 1514.50 8217.00
2009 1725.00 1197.50 1060.00 639.50 261.00 110.50 30.00 47.50 106.00 638.50 721.00 1376.50 7913.00
2010 1474.00 1231.00 923.50 469.50 246.00 43.50 3.50 9.50 217.50 441.50 853.00 1408.50 7321.00
2011 1577.50 1287.00 1150.50 678.00 352.00 92.00 1.00 0.50 227.50 445.00 802.00 1121.50 7734.50
2012 1327.00 1084.00 598.00 607.50 172.50 49.50 2.00 23.00 212.50 390.00 h 0.00 z 0.00 z 4076.00
Period of Record Statistics
MEAN 1478.02 1268.58 1038.75 603.91 294.61 71.87 14.38 28.72 166.17 474.02 874.90 1320.33 7627.76
S.D. 160.84 142.27 150.62 100.00 89.73 35.46 11.34 22.67 53.59 100.33 109.73 151.98 459.80
SKEW 0.17 0.04 -0.48 0.36 0.09 1.01 1.23 1.21 0.13 -0.58 0.30 0.42 -0.14
MAX 1880.50 1711.52 1379.00 893.50 508.00 196.00 55.50 104.50 297.00 638.50 1148.00 1671.00 8665.43
MIN 1085.00 945.00 598.00 392.00 101.00 20.00 0.00 0.00 66.50 193.00 628.50 1056.50 6444.50
NO YRS 81 80 81 79 81 81 79 81 85 79 80 81 65