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 201304
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
1911 0.00 z 1331.08 b 1019.50 648.50 152.50 23.50 69.00 141.00 374.00 785.50 1478.00 1531.00 7553.58
1912 2375.50 1679.00 1536.00 707.00 491.00 0.00 z 41.50 105.50 281.00 537.50 937.00 1362.00 10053.00
1913 1834.00 1588.00 1424.00 570.50 409.50 81.50 29.00 25.00 263.00 682.50 857.00 1197.50 8961.50
1914 1512.50 1742.50 1225.00 776.50 271.50 92.00 4.00 85.00 179.00 391.50 989.00 1739.00 9007.50
1915 1769.00 1244.50 1205.50 409.00 449.50 194.50 86.00 99.50 255.00 512.50 1028.50 1450.00 8703.50
1916 1959.50 1704.00 1369.50 782.50 429.00 181.50 0.00 67.00 295.50 717.50 1052.50 1824.00 10382.50
1917 2002.50 1793.50 1231.00 841.00 473.00 205.00 28.00 0.00 z 294.00 898.50 877.00 1857.00 10500.50
1918 2032.00 1452.50 947.50 716.00 314.00 84.00 28.50 18.50 373.50 542.50 929.50 1330.50 8769.00
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1947 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5.17 a 16.50 137.50 521.50 1026.00 1563.50 3270.17
1949 1673.50 1606.00 1288.50 612.00 253.00 44.48 a 2.50 31.50 261.50 508.50 898.00 1528.50 8707.98
1950 2008.50 1474.50 1376.50 996.00 456.50 73.50 22.50 103.50 187.50 491.00 1189.00 1715.00 10094.00
1951 1841.40 a 1401.00 1392.50 775.50 193.75 a 139.00 21.70 a 57.00 324.00 608.63 a 1232.50 1650.00 9636.98
1952 1776.50 1252.00 1312.00 574.00 271.50 38.50 5.00 33.00 199.00 685.00 960.50 1316.00 8423.00
1953 1598.05 a 1398.50 1142.00 779.50 315.50 80.00 21.00 11.00 220.00 364.50 886.50 1491.00 8307.55
1954 1892.50 1061.50 1263.50 721.50 480.50 64.50 14.98 a 30.50 271.50 627.50 885.50 1334.00 8647.98
1955 1687.50 1525.50 1404.00 468.50 187.50 56.90 a 0.50 6.00 220.50 497.03 a 1260.50 1759.50 9073.93
1956 1682.50 1559.50 1318.00 806.50 348.50 35.50 26.35 a 33.50 271.07 b 373.00 1009.66 a 1451.83 a 8915.91
1957 1899.27 a 1424.00 1251.50 726.96 b 331.00 87.00 0.00 a 39.00 281.00 578.67 a 1015.34 a 1347.47 a 8981.21
1958 1466.00 1451.00 1121.00 609.00 260.50 191.50 38.00 55.00 187.50 494.50 994.00 1690.50 8558.50
1959 1837.00 1479.50 1088.00 666.00 274.50 64.50 22.50 14.50 235.50 734.50 1315.00 1247.50 8979.00
1960 1679.50 1498.50 1470.50 696.50 298.50 102.00 15.50 22.50 253.50 539.00 980.50 1566.50 9123.00
1961 1704.50 1182.00 954.50 856.00 375.00 44.00 20.50 14.00 258.50 522.00 1047.50 1616.00 8594.50
1962 1829.50 1553.48 a 1193.00 785.00 288.50 97.50 30.00 22.00 271.00 465.00 907.50 1485.50 8927.98
1963 1960.50 1536.50 1035.50 622.00 365.00 52.00 4.50 37.50 145.00 267.00 892.50 1778.00 8696.00
1964 1525.20 a 1375.50 1358.50 674.50 228.00 86.00 2.50 111.50 281.00 574.00 1022.00 1781.00 9019.70
1965 1888.50 1596.00 1540.50 756.00 301.00 100.00 18.00 67.50 482.50 519.00 1086.00 1339.00 9694.00
1966 2109.50 1484.50 1096.00 849.00 439.00 79.50 3.50 88.87 a 229.00 584.00 1185.50 1580.50 9728.87
1967 1695.50 1686.50 1226.00 739.50 526.00 102.00 47.03 b 66.50 217.50 661.00 1094.00 1493.00 9554.54
1968 1710.00 1572.50 928.50 612.50 397.00 89.50 43.50 53.00 192.00 508.00 988.50 1613.50 8708.50
1969 1852.00 1368.50 1327.50 616.50 292.50 203.00 35.00 3.00 186.00 691.50 1026.50 1429.50 9031.50
1970 1901.50 1459.00 1377.50 769.00 394.50 46.50 10.33 a 20.00 233.00 574.50 1098.00 1669.50 9553.33
1971 1962.00 1445.50 1267.00 671.50 381.50 41.00 50.00 61.00 218.00 475.50 1049.00 1551.50 9173.50
1972 1925.00 1655.00 1295.50 806.00 231.50 76.50 29.50 56.50 278.00 682.00 1076.50 1767.50 9879.50
1973 1580.00 1326.00 884.50 671.00 331.50 54.50 12.00 6.50 240.50 383.50 1027.50 1573.00 8090.50
1974 1776.00 1410.50 1264.50 683.50 435.00 77.50 2.50 77.50 307.00 522.00 990.00 1329.50 8875.50
1975 1651.00 1433.00 1373.50 890.00 228.00 82.00 13.00 29.50 285.00 485.00 966.50 1552.00 8988.50
1976 1795.00 1215.50 1203.50 500.50 290.00 33.00 6.50 24.50 185.00 715.50 1242.00 1816.00 9027.00
1977 2078.00 1295.00 967.00 469.50 81.50 34.14 a 5.00 73.50 206.50 548.50 1075.50 1674.50 8508.64
1978 1876.50 1569.50 1175.50 711.43 b 247.50 84.00 14.00 21.50 182.00 526.50 1121.50 1719.00 9248.93
1979 2051.00 1670.50 1246.00 834.00 465.00 94.44 c 12.50 59.00 169.00 615.00 1055.50 1352.00 9623.94
1980 1736.50 1529.00 1329.00 564.50 209.50 65.50 6.00 22.00 262.00 674.00 932.59 a 1560.00 8890.59
1981 1545.00 1240.50 965.50 584.00 308.00 60.00 20.50 14.50 234.50 639.50 843.50 1534.50 7990.00
1982 2081.00 1462.00 1262.00 776.50 204.00 168.50 3.00 50.00 0.00 z 523.00 1135.50 1315.00 8980.50
1983 1553.50 1169.00 1087.00 722.00 377.50 92.50 7.00 0.00 214.00 551.00 998.50 1972.63 a 8744.63
1984 1700.00 1115.50 1286.50 599.50 328.50 39.50 13.50 11.50 330.00 463.50 1049.50 1575.50 8513.00
1985 1741.00 1476.00 986.50 527.07 a 176.00 154.00 5.00 74.00 271.55 a 614.00 1311.00 1896.00 9232.12
1986 1523.00 0.00 z 1057.10 a 547.50 280.03 a 41.00 6.00 64.00 235.50 522.00 1175.50 1379.50 6831.13
1987 1493.00 1002.81 a 604.00 l 459.00 263.00 49.50 12.00 63.00 187.50 747.50 555.00 j 714.00 n 4277.31
1988 1061.00 o 1694.43 a 749.50 l 714.00 151.50 30.50 8.50 42.50 250.00 750.50 1106.00 1103.50 i 4747.93
1989 1617.00 1745.00 1364.50 786.00 338.00 109.50 1.00 42.00 246.00 599.00 1202.00 1825.00 9875.00
1990 1410.50 1446.00 1133.00 726.00 398.50 66.00 15.00 30.00 208.50 692.50 994.50 1653.00 8773.50
1991 1824.50 1293.00 1161.00 607.50 262.50 27.50 16.50 20.50 299.00 700.00 1293.50 1532.00 9037.50
1992 1505.00 1233.00 1115.00 798.00 261.50 144.83 a 152.50 138.00 345.00 702.00 1173.00 1603.45 b 9171.28
1993 1833.00 1524.50 1276.00 809.00 400.00 195.00 68.00 63.00 472.50 782.00 1265.50 1611.00 10299.50
1994 2151.50 1696.00 1173.00 758.50 320.50 85.00 44.00 109.00 229.50 584.50 993.00 1468.00 9612.50
1995 1748.00 1587.50 1211.00 908.00 407.00 66.00 43.50 24.00 339.00 697.00 1359.00 1697.50 10087.50
1996 2057.00 1650.50 1507.00 932.00 445.50 121.00 42.50 38.00 304.50 689.50 1368.00 1769.00 10924.50
1997 1954.00 1447.00 1321.50 835.00 499.00 27.50 53.00 73.00 165.50 601.50 1195.50 1255.50 9428.00
1998 1630.00 1006.50 1166.00 549.50 149.00 140.00 2.00 4.50 132.00 541.50 968.00 1421.00 7710.00
1999 1820.73 a 1220.50 1111.50 650.50 250.50 102.00 7.50 22.00 272.50 662.00 848.50 1351.37 d 8319.60
2000 1715.00 1275.00 923.00 702.00 273.50 142.00 26.00 21.50 297.50 537.16 b 1068.00 1902.07 c 8882.73
2001 1531.00 1678.00 1255.00 695.00 280.00 94.50 19.00 12.50 0.00 z 649.50 758.00 1306.00 8278.50
2002 1475.50 1177.50 1466.00 773.50 477.00 52.00 11.00 27.00 207.50 839.00 1102.00 1379.00 8987.00
2003 1718.50 1551.50 1263.00 685.50 326.50 95.50 14.50 7.00 244.50 569.50 1169.50 1149.00 f 7645.50
2004 1898.00 1424.00 1095.50 673.50 427.00 166.00 51.50 141.50 145.50 575.00 933.00 1157.50 g 7530.50
2005 1846.00 1299.50 1226.00 561.50 394.00 21.50 30.50 37.00 157.00 527.50 972.00 1521.21 c 8593.71
2006 1293.50 1508.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 727.50 0.00 z 986.00 h 3529.00
2007 1280.00 f 1154.50 h 824.00 g 345.50 n 216.00 29.50 7.00 57.50 231.00 430.00 f 0.00 z 924.50 n 541.00
2008 1809.00 1642.50 1026.00 f 808.00 418.00 106.50 15.50 28.00 228.00 618.00 1006.00 1842.00 8521.50
2009 939.00 q 1443.00 1261.00 536.00 h 354.00 135.00 0.00 z 69.00 103.00 798.50 827.50 1613.00 6604.00
2010 1738.50 1431.50 909.50 363.00 f 330.50 79.50 1.00 23.50 317.50 347.50 g 798.00 g 1043.00 k 4831.50
2011 1813.00 1479.00 1317.00 737.59 a 345.50 115.50 5.17 a 5.00 272.00 504.50 507.00 o 1327.50 7921.75
2012 1472.00 833.50 i 788.50 632.40 e 241.80 a 49.00 0.00 31.50 246.72 a 677.50 1030.50 1481.91 c 6651.83
2013 1679.00 1480.50 d 700.50 p 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3159.50
Period of Record Statistics
MEAN 1772.63 1449.00 1210.72 698.87 324.97 88.40 21.83 45.84 248.30 593.96 1056.36 1558.57 9077.65
S.D. 201.61 182.67 167.78 120.03 98.34 48.35 24.33 34.70 69.37 117.86 145.28 186.72 617.04
SKEW 0.19 -0.43 -0.31 -0.15 -0.04 0.83 2.68 1.02 0.86 0.00 0.59 0.15 0.60
MAX 2375.50 1793.50 1540.50 996.00 526.00 205.00 152.50 141.50 482.50 898.50 1478.00 1972.63 10924.50
MIN 1293.50 1002.81 788.50 409.00 81.50 21.50 0.00 0.00 103.00 267.00 758.00 1197.50 7710.00
NO YRS 69 70 67 68 71 70 71 71 70 71 68 66 55