date! ,

Monthly Total Heating Degree Days

(a vali)

Base Temperature = 65 F

File last updated on Apr 6, 2013
*** Note *** Provisional Data *** After Year/Month 200804
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
1907 0.00 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 1434.04 d 1434.04
1908 1600.78 b 1425.00 1272.60 b 624.00 388.53 a 124.82 b 27.90 a 98.50 f 132.00 e 576.17 b 990.00 e 1578.13 d 8739.94
1909 1790.00 1524.44 a 1268.50 969.00 417.00 85.18 b 3.50 10.33 a 226.00 684.50 1005.50 1749.00 9732.96
1910 1644.50 1677.00 724.37 a 516.50 437.00 94.00 12.50 96.00 231.50 495.50 1283.00 1652.62 b 8864.49
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1945 0.00 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
1946 1695.50 1567.00 880.00 571.00 478.00 136.00 34.50 100.00 352.00 696.50 1173.50 1714.50 9398.50
1947 1607.00 1619.50 569.00 p 816.50 490.50 182.00 31.50 26.50 312.00 329.50 1269.31 a 1598.00 8282.31
1948 1889.00 1642.50 1310.50 677.00 355.00 139.50 35.50 44.00 186.50 582.00 1107.50 1674.00 a 9643.00
1949 1778.50 1697.50 1414.00 656.90 a 306.50 75.00 22.00 51.00 330.00 587.00 969.00 1648.00 9535.40
1950 2112.00 1509.00 1444.50 1043.00 497.00 129.00 46.00 131.23 a 191.50 534.00 1228.50 1763.38 a 10629.12
1951 1864.50 1450.00 1424.50 819.00 246.00 178.00 52.50 92.00 369.00 666.00 1319.50 1722.50 10203.50
1952 1838.00 1288.50 1333.50 592.00 352.50 88.00 38.00 102.00 244.00 718.00 1001.00 1363.00 8958.50
1953 1651.50 1421.26 a 1162.50 813.00 350.50 99.00 51.00 28.00 293.50 376.00 895.00 1546.00 8687.26
1954 1978.00 1086.50 1316.00 772.50 523.50 100.00 34.00 51.00 320.00 676.00 962.00 1385.00 9204.50
1955 1767.00 1566.50 1461.13 a 496.50 228.50 92.00 9.50 15.50 284.00 551.00 1348.00 1820.00 9639.63
1956 1690.50 1601.00 1376.50 887.00 414.50 36.50 62.50 63.00 392.50 423.50 1049.00 1535.00 9531.50
1957 2030.00 1505.50 1330.00 764.46 b 349.50 131.50 4.00 62.00 a 345.00 623.50 1091.00 1447.50 9683.96
1958 1499.37 a 1508.00 1155.00 652.76 a 334.50 284.50 75.00 67.50 234.00 522.50 1037.50 1766.48 a 9137.11
1959 1921.50 1508.00 1139.00 690.00 308.00 77.00 33.50 22.50 254.00 755.88 a 1372.50 1269.00 9350.88
1960 1707.50 1499.00 1458.03 a 738.00 345.00 123.50 36.50 17.00 231.72 a 526.00 1022.50 1616.50 9321.26
1961 1755.12 a 1209.50 986.50 871.50 390.50 49.50 21.00 15.00 302.50 555.50 1070.50 1636.00 8863.12
1962 1894.50 1552.50 1182.50 801.00 299.00 110.00 49.00 42.00 298.00 486.50 915.50 1535.00 9165.50
1963 2004.00 1576.50 1050.00 629.00 402.50 66.00 8.50 52.50 170.50 259.50 909.00 1773.00 8901.00
1964 1551.00 1406.00 1390.50 669.00 243.50 131.50 5.50 138.50 338.00 604.50 1058.50 1813.00 9349.50
1965 1896.00 1610.50 1536.50 747.50 337.00 99.00 33.00 66.50 494.00 529.50 1112.50 1351.50 9813.50
1966 2155.50 1543.00 1072.00 838.97 a 468.00 111.50 1.00 95.50 259.50 598.00 1178.50 1594.00 9915.46
1967 1715.50 1689.00 1222.50 779.50 519.50 116.50 54.00 78.50 203.00 655.50 1106.50 1551.00 9691.00
1968 1763.50 1596.50 985.00 660.50 416.50 114.50 61.50 88.50 244.00 527.00 1038.00 1693.00 9188.50
1969 1902.00 1379.00 1335.00 607.50 342.00 257.00 46.50 14.00 238.00 735.50 1049.00 1452.00 9357.50
1970 1904.50 1478.00 1394.00 772.50 426.50 70.00 16.50 35.50 252.50 618.00 1134.50 1714.00 9816.50
1971 2031.00 1453.00 1276.50 702.00 395.00 49.50 77.50 66.50 259.50 505.00 1107.00 1613.50 9536.00
1972 1991.50 1713.50 1320.00 815.50 266.50 105.00 59.50 93.00 369.50 755.00 1156.50 1870.50 10516.00
1973 1649.50 1410.50 935.00 749.50 391.50 110.00 39.00 34.00 311.00 450.50 1118.50 1617.00 8816.00
1974 1845.50 1421.00 1323.50 717.00 472.50 103.00 8.00 102.50 377.50 569.00 1033.50 1372.50 9345.50
1975 1674.00 1487.50 1404.50 918.00 285.00 123.50 26.00 38.50 338.00 539.50 988.50 1617.00 9440.00
1976 1846.50 1245.00 1299.50 560.00 324.47 a 52.00 11.00 26.00 229.00 759.50 1263.00 1871.50 9487.47
1977 2063.00 1327.50 986.00 524.50 96.50 55.00 7.50 135.50 268.00 601.50 1162.50 1765.00 8992.50
1978 1952.50 1597.50 1211.00 0.00 z 264.00 131.50 45.50 64.50 0.00 z 604.50 1168.00 1746.00 8785.00
1979 2081.50 1695.00 1263.50 846.00 0.00 z 113.50 0.00 z 109.53 a 242.50 730.50 0.00 z 1391.00 8473.03
1980 1801.50 1565.00 1360.00 580.00 230.00 106.00 12.50 68.50 377.00 791.00 1010.00 1630.50 9532.00
1981 1591.00 1271.00 999.50 632.00 328.50 96.50 36.00 32.00 254.00 647.90 a 848.00 1573.50 8309.90
1982 2119.37 a 1467.50 1283.50 769.00 223.00 196.50 9.00 65.00 268.50 547.50 1160.50 1355.00 9464.37
1983 1559.50 1201.00 1089.50 712.50 413.50 93.00 11.50 4.00 255.50 605.50 1052.00 2001.00 8998.50
1984 1740.50 1150.50 1345.50 634.00 382.50 56.50 20.50 27.50 403.50 543.00 1052.00 1646.00 9002.00
1985 1793.50 1508.50 1012.00 569.00 197.00 194.00 26.00 126.00 346.55 a 624.00 1351.50 1893.50 9641.55
1986 1570.50 1479.85 a 1010.00 590.00 284.50 71.00 13.00 106.00 319.00 604.00 1265.00 1409.50 8722.35
1987 1548.00 1050.50 1027.00 446.50 237.50 71.00 19.00 100.00 213.00 705.50 932.00 1371.50 7721.50
1988 1859.50 1651.00 1190.92 a 623.00 129.50 28.50 8.50 47.50 241.00 707.50 1103.00 1579.50 9169.42
1989 1579.50 1725.00 1328.50 753.50 298.50 106.00 1.50 34.00 241.50 550.00 1255.50 1873.00 9746.50
1990 1383.00 1350.50 1089.50 704.00 353.00 66.50 12.50 31.00 0.00 z 674.50 1008.50 1658.50 8331.50
1991 1816.00 1228.00 1116.50 580.50 235.50 26.50 20.50 24.00 299.48 a 720.00 1315.34 a 1514.00 8896.33
1992 1501.50 1266.00 1144.50 801.50 276.50 167.00 129.50 127.50 297.50 638.60 a 1161.50 1662.50 9174.10
1993 1753.00 1472.50 1204.00 760.00 375.50 181.50 48.50 57.87 a 436.50 746.00 1248.00 1559.82 a 9843.18
1994 2137.97 a 1629.50 1083.50 717.00 284.50 55.00 23.00 91.00 189.00 520.50 953.00 1385.18 a 9069.15
1995 1695.50 1547.00 1138.00 900.50 358.00 60.00 28.50 11.50 299.50 695.50 1356.50 1699.00 9789.50
1996 2051.00 1591.50 1483.50 886.00 409.50 91.00 37.50 18.00 268.50 647.50 1349.50 0.00 z 8833.50
1997 1920.50 1419.00 1276.50 806.50 488.50 27.00 62.50 83.00 176.50 622.50 1217.00 1283.50 9383.00
1998 1596.00 1004.00 1213.50 548.50 173.50 163.50 24.50 9.00 165.50 576.50 1055.50 1480.00 8010.00
1999 1779.50 1235.00 1102.50 645.00 298.00 113.00 16.50 34.00 307.00 674.00 855.00 1381.00 8440.50
2000 1704.00 1218.00 959.00 702.50 309.50 166.50 25.50 32.00 288.50 552.00 1071.72 a 1967.00 8996.22
2001 1482.00 1629.50 1234.00 690.50 276.50 105.00 26.00 24.00 267.00 667.03 b 749.46 b 1348.00 8499.00
2002 1508.00 1185.50 1455.50 781.00 0.00 z 61.50 19.00 34.00 0.00 z 905.50 1177.00 1385.50 8512.50
2003 1731.00 1573.00 1245.00 670.50 310.00 91.00 18.50 21.00 265.00 573.50 1190.00 1389.00 9077.50
2004 1942.00 1426.00 1176.00 711.50 473.00 190.50 66.00 159.00 156.50 610.00 957.50 1555.50 9423.50
2005 1823.50 1301.50 1259.00 552.50 415.50 49.50 27.50 70.50 178.50 572.50 1043.50 1500.00 8794.00
2006 1298.00 1520.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 749.50 1015.50 1295.00 5878.00
2007 1595.50 1625.00 1029.00 768.50 254.50 52.50 18.50 65.00 264.50 539.50 1084.50 1676.00 8973.00
2008 1790.50 1627.00 1310.00 836.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5563.50
Period of Record Statistics
MEAN 1778.99 1460.69 1215.79 713.76 341.59 106.73 30.83 59.98 277.10 606.45 1102.08 1589.72 9270.07
S.D. 192.66 173.57 168.47 121.24 94.91 52.26 22.88 38.52 71.63 110.26 139.68 177.49 535.24
SKEW -0.05 -0.70 -0.42 0.18 -0.16 1.04 1.53 0.59 0.48 -0.39 0.06 0.15 -0.21
MAX 2155.50 1725.00 1536.50 1043.00 523.50 284.50 129.50 159.00 494.00 905.50 1372.50 2001.00 10629.12
MIN 1298.00 1004.00 724.37 446.50 96.50 26.50 1.00 4.00 132.00 259.50 749.46 1269.00 7721.50
NO YRS 66 66 64 64 62 64 63 63 61 65 64 65 57