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
1913 0.00 z 0.00 z 0.00 z 0.00 z 336.00 h 127.00 77.50 a 86.05 b 329.00 629.19 d 886.03 a 1192.39 c 3327.16
1914 1450.80 a 1743.50 1318.00 863.50 337.90 a 194.48 a 25.00 135.00 258.50 440.50 1048.00 1574.28 a 9389.47
1915 1753.00 1201.50 1331.93 b 521.50 540.95 a 260.50 131.00 203.00 277.50 628.00 1009.50 1436.50 9294.88
1916 0.00 z 1316.00 h 1416.00 812.00 426.50 191.00 0.00 111.00 333.50 684.00 1128.50 1688.00 6790.50
1917 1851.22 a 1742.50 1282.50 916.00 617.00 248.79 a 84.00 180.50 349.50 932.67 b 984.50 1767.00 b 10956.18
1918 2018.62 a 1540.50 1099.47 a 811.03 a 354.71 e 157.00 33.50 43.00 472.20 e 605.00 929.50 1280.50 9345.03
1919 1414.00 1346.07 a 1183.50 743.00 425.50 45.00 19.50 116.50 248.50 762.17 b 1171.00 1868.78 a 9343.53
1920 1940.00 1568.00 1217.00 978.10 a 417.50 132.00 102.00 95.00 203.50 395.00 1148.50 1429.00 9625.60
1921 1487.00 1312.00 1192.47 a 621.21 a 371.50 66.50 9.50 81.00 259.00 443.50 g 1255.00 0.00 z 6655.17
1922 0.00 z 0.00 z 1242.07 a 850.20 e 219.50 162.00 102.30 a 133.00 225.00 b 564.72 a 840.00 e 1597.57 b 5936.35
1923 1582.50 1655.50 1464.50 871.00 428.00 59.50 9.50 183.50 270.00 b 668.50 961.80 e 878.00 i 8154.30
1924 0.00 z 1396.00 1323.59 c 831.21 a 523.50 g 225.50 122.50 149.66 b 355.38 d 426.80 c 1078.97 a 1796.93 b 7706.54
1925 1688.47 a 955.50 i 1188.50 590.00 509.84 c 124.00 70.55 b 36.68 a 140.00 f 892.36 c 1083.50 980.50 j 6183.90
1926 1645.30 d 1367.85 a 1471.97 b 955.80 e 294.50 b 216.50 54.77 a 29.00 n 237.00 h 706.28 a 1210.86 a 1238.00 g 7923.83
1927 0.00 z 1293.70 a 0.00 z 560.00 h 445.22 b 245.00 86.50 164.30 a 204.44 c 0.00 z 1218.46 d 1805.50 5463.13
1928 1350.00 g 1602.25 c 1026.00 i 1015.56 c 0.00 z 91.50 r 39.00 108.50 b 371.11 c 516.00 g 972.60 e 1075.00 g 4109.02
1929 0.00 z 662.00 p 927.00 i 676.67 c 415.00 l 111.00 h 55.91 c 86.28 a 0.00 z 0.00 z 0.00 z 1018.00 j 818.86
1930 1881.38 b 1060.00 f 1292.24 d 716.54 d 373.60 b 65.50 g 48.16 c 60.40 b 213.50 g 304.00 p 919.62 d 565.00 r 5291.93
1931 0.00 z 1169.26 a 1285.35 d 380.50 i 310.50 p 138.00 f 31.53 b 119.23 e 105.50 p 0.00 z 728.00 f 0.00 z 2605.38
1932 808.00 n 1188.00 g 1299.50 f 480.50 m 481.61 c 78.00 87.12 b 97.77 e 256.00 p 797.98 b 1195.56 c 0.00 z 2738.04
1933 1558.78 a 1015.50 k 1413.37 d 886.61 b 315.50 n 62.07 a 23.50 f 177.00 119.00 i 383.00 l 0.00 z 1543.11 d 5640.94
1934 741.00 n 1501.92 c 0.00 z 0.00 z 128.00 o 49.50 32.03 a 174.50 274.20 e 531.98 c 564.00 l 1193.00 g 2564.14
1935 0.00 z 1304.92 d 1141.12 b 759.64 b 482.00 190.00 4.00 24.69 d 286.80 e 225.50 r 800.50 g 1476.24 b 5669.41
1936 1441.00 g 1872.17 c 600.00 o 668.50 h 294.50 d 151.61 b 9.00 f 95.50 173.28 a 369.00 l 787.00 i 1382.94 d 3970.00
1937 1741.54 c 1331.83 e 1317.50 d 836.00 309.48 a 98.50 g 35.13 a 3.00 g 300.00 c 652.72 d 625.50 m 790.00 o 6524.20
1938 1665.45 b 1331.12 c 1043.84 b 436.50 g 366.00 161.90 a 17.00 h 50.93 c 251.50 468.00 1020.00 1469.00 7827.74
1939 1520.00 1596.50 1304.00 867.50 284.00 140.00 27.00 43.40 a 265.50 651.00 984.50 1232.25 a 8915.65
1940 1758.22 a 1383.00 1432.50 858.50 521.50 157.50 64.50 124.50 224.50 554.00 1116.35 d 1389.50 9584.56
1941 1529.33 d 1384.38 b 1321.50 565.34 a 271.80 c 0.00 z 0.00 z 0.00 z 143.50 n 633.90 b 940.34 a 858.50 k 6646.61
1942 1525.00 1430.00 823.00 j 610.71 b 406.00 103.00 79.22 d 64.07 a 305.00 c 587.97 a 969.00 e 1591.91 d 7671.88
1943 1772.68 a 1487.77 b 1506.17 b 886.00 464.45 c 98.57 b 10.50 f 37.50 336.00 538.22 b 1156.50 947.50 j 8283.87
1944 989.50 g 826.00 j 313.50 v 0.00 z 184.85 d 97.50 h 0.00 z 0.00 z 0.00 z 0.00 z 458.50 o 1519.50 1704.35
1945 1751.50 1366.00 889.00 719.00 0.00 z 100.00 h 53.73 a 29.50 g 298.50 665.50 1098.00 0.00 z 6841.23
1946 1570.50 1507.15 b 856.50 641.00 392.50 137.07 a 37.50 129.00 284.42 d 522.87 a 1023.50 1511.00 8613.01
1947 1524.00 1536.50 1361.93 a 837.86 b 360.50 i 177.50 53.73 a 20.00 275.69 a 233.00 m 1172.59 a 666.50 q 6959.80
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 102.50 36.00 38.50 130.00 529.00 948.50 1498.50 3283.00
1949 1535.00 1449.50 1286.50 a 650.00 312.50 43.50 20.50 52.50 366.50 538.50 1042.00 1496.50 8793.50
1950 1805.00 1444.00 1448.50 1070.50 465.50 133.50 93.50 165.00 267.50 495.00 1209.00 1686.00 10283.00
1951 1738.00 1424.50 1370.50 809.50 260.00 174.00 58.50 152.00 386.90 a 639.00 1285.00 1547.50 9845.40
1952 1597.00 1326.00 1308.50 664.00 396.50 109.00 45.50 89.00 267.93 a 797.00 998.79 a 1324.00 8923.22
1953 1532.00 1411.00 1177.00 868.50 377.50 96.00 58.50 43.00 283.93 b 418.00 891.50 1421.00 8577.93
1954 1705.50 1120.52 a 1384.67 a 720.50 571.95 a 103.50 44.50 111.50 334.14 a 672.00 945.00 1413.00 9126.77
1955 1706.00 1444.00 1363.00 524.50 269.18 a 119.00 11.00 41.00 295.38 d 401.00 i 1229.00 0.00 z 7002.07
1956 1583.00 1526.00 1361.50 836.00 413.85 a 86.00 119.00 90.50 376.03 a 412.00 1038.50 1452.00 9294.38
1957 1852.50 1408.50 1283.00 703.00 412.50 140.50 28.00 103.50 350.50 646.50 1063.00 1456.00 9447.50
1958 1498.00 1511.00 1187.00 673.50 401.97 a 253.50 72.00 99.00 251.00 563.68 a 1006.00 1767.00 9283.65
1959 1902.00 1547.26 a 1267.50 753.10 a 281.50 109.00 65.50 29.00 254.50 735.00 1319.00 1268.42 a 9531.78
1960 1621.00 1450.50 1538.00 733.50 402.00 177.50 83.50 56.50 295.50 584.35 a 968.28 a 1590.00 9500.63
1961 1735.50 1249.00 1121.00 833.50 472.00 131.50 44.00 44.50 314.00 548.00 1055.50 1523.50 9072.00
1962 1808.50 1537.50 1168.00 786.00 288.82 a 130.50 71.00 79.00 353.50 576.17 b 993.10 a 1539.50 9331.59
1963 1975.50 1636.00 1164.00 653.28 a 419.50 119.50 31.00 109.00 0.00 z 305.00 870.00 1721.53 a 9004.31
1964 1462.00 1420.50 1338.50 707.50 247.00 140.00 28.50 172.00 304.00 646.50 953.00 1639.50 9059.00
1965 1783.50 1596.50 1465.50 804.50 270.22 a 137.50 95.00 113.00 422.50 592.50 1054.00 1312.50 9647.22
1966 1890.00 1422.50 1112.50 849.00 522.50 106.00 13.00 126.00 286.00 642.50 1096.50 1497.00 9563.50
1967 1556.00 1633.50 1217.50 754.50 559.50 103.00 89.00 164.50 275.00 673.50 1160.50 1465.50 9652.00
1968 1679.50 1570.00 1004.50 655.50 434.50 175.00 76.00 106.00 238.00 531.13 a 1033.50 1518.50 9022.13
1969 1632.50 1382.00 1361.50 649.00 345.00 318.62 a 57.35 a 15.50 281.00 709.50 1064.00 1440.00 9255.97
1970 1839.00 1475.50 1356.50 715.00 378.50 90.50 33.50 65.00 280.50 519.50 1063.50 1510.00 9327.00
1971 1856.00 1460.50 1358.00 761.50 472.00 70.50 104.37 a 135.00 261.50 420.50 1029.00 1461.00 9389.87
1972 1872.00 1615.50 1326.28 a 861.50 267.50 140.50 74.50 92.50 316.50 726.00 1082.50 1633.00 10008.28
1973 1555.00 1343.50 914.00 736.00 467.00 76.00 40.00 54.00 303.50 426.50 1038.00 1523.00 8476.50
1974 1693.00 1460.50 1241.50 712.00 460.50 208.00 20.50 103.50 408.50 601.50 964.66 a 1325.00 9199.16
1975 1592.50 1359.50 1324.50 926.50 264.00 143.00 51.00 73.50 373.00 499.50 906.50 1528.50 9042.00
1976 1699.50 1236.50 1241.50 640.00 405.00 43.50 36.50 99.50 323.50 796.50 1293.50 1827.00 9642.50
1977 2025.00 1335.00 985.00 552.00 126.50 148.50 34.50 182.00 285.50 607.00 1002.93 a 1536.00 8819.93
1978 1745.00 1545.50 1285.47 a 781.00 293.00 145.50 69.00 52.00 210.00 620.00 1101.00 1657.00 9504.47
1979 1966.00 1606.00 1205.38 a 849.50 492.00 146.50 47.50 80.71 b 233.00 701.12 a 1079.00 1356.50 9763.21
1980 1700.50 1552.50 1303.00 645.50 260.40 a 172.50 28.93 a 54.00 296.50 774.00 1026.50 1528.50 9342.83
1981 1617.00 1277.50 1079.00 643.50 401.50 111.21 a 44.00 41.00 319.50 703.00 882.00 1439.00 8558.21
1982 1945.50 1461.00 1252.00 864.50 194.50 268.00 21.50 132.00 321.00 571.50 1087.00 1321.50 9440.00
1983 1497.00 1137.00 1118.00 853.00 0.00 z 151.50 17.00 17.50 260.50 592.00 994.00 1809.50 8447.00
1984 1727.00 1133.50 1385.00 642.50 434.50 73.50 52.50 39.00 351.00 512.50 1043.00 1479.22 a 8873.22
1985 1732.00 1483.00 1012.84 b 625.00 256.50 215.00 52.00 123.50 303.00 622.00 1193.00 1813.50 9431.34
1986 1590.82 a 1411.50 1109.50 589.50 247.50 133.50 26.50 145.00 281.50 613.50 1170.00 1384.50 8703.32
1987 1466.50 1125.50 984.00 525.00 268.50 73.00 35.00 86.00 211.50 798.50 952.00 1294.50 7820.00
1988 1736.00 1608.46 a 1196.71 b 665.50 198.50 75.50 19.50 0.00 z 288.62 a 893.50 1045.00 1596.50 9323.79
1989 1536.57 a 1762.00 1441.50 833.50 406.00 212.50 37.00 94.50 325.00 638.50 1253.50 1954.00 10494.57
1990 1473.00 1473.50 1121.50 710.50 515.50 129.00 120.00 77.00 345.00 700.50 852.50 0.00 z 7518.00
1991 0.00 z 1334.00 1169.00 654.50 182.00 x 52.50 93.00 55.00 398.50 764.50 1265.00 1549.00 7335.00
1992 1578.50 1349.00 1289.50 811.00 367.00 232.50 201.00 168.00 353.00 736.00 1166.50 1510.00 9762.00
1993 1718.50 1495.00 1280.00 895.50 441.50 242.00 50.50 98.00 486.50 807.50 1168.50 1504.50 10188.00
1994 2071.50 1621.00 1214.00 830.00 401.50 137.00 101.50 128.00 254.00 596.00 989.50 1350.00 9694.00
1995 1624.50 1491.00 1182.50 966.00 485.00 96.00 63.50 28.00 380.00 636.00 1385.00 1668.00 10005.50
1996 1896.50 1641.09 a 1597.00 988.50 471.00 134.00 141.50 102.50 333.00 665.98 a 1266.00 1529.50 10766.57
1997 1791.00 1395.50 1367.50 836.50 624.50 76.50 106.00 169.50 264.00 649.00 1180.00 1318.00 9778.00
1998 1516.42 a 1027.00 1178.00 593.00 203.00 158.00 61.50 30.50 193.50 570.50 967.50 1401.72 a 7900.63
1999 1783.53 a 1236.50 1187.50 624.00 248.00 151.50 36.00 91.50 338.50 750.50 869.00 1419.00 8735.53
2000 1762.50 1339.50 998.50 814.50 324.00 193.00 81.00 62.50 322.00 606.57 a 1045.50 1834.17 a 9383.73
2001 1546.00 1610.00 1263.50 633.50 345.50 135.50 70.00 60.50 316.03 a 696.50 767.50 1288.00 8732.54
2002 1438.50 1251.50 1452.00 820.00 537.00 128.00 19.50 58.00 227.50 924.50 1166.50 1448.50 9471.50
2003 1734.50 1616.00 1264.50 825.50 419.00 148.00 60.50 28.50 277.50 668.71 c 1099.00 1392.00 9533.71
2004 1875.50 1408.11 b 1159.50 789.31 a 494.00 215.00 99.00 219.00 155.50 610.00 962.50 1577.90 a 9565.32
2005 1751.50 1273.50 1345.00 603.50 476.00 44.00 53.00 87.00 194.00 578.50 1068.60 e 1529.50 9004.10
2006 1319.50 1524.00 1192.50 564.50 400.50 132.00 25.00 75.50 400.00 831.50 968.00 1393.00 8826.00
2007 1600.12 a 1093.50 l 1104.63 a 789.50 266.00 79.00 67.00 73.50 242.00 521.00 1097.00 1625.00 7464.75
2008 1669.50 1637.00 1448.50 807.50 508.00 147.00 43.50 79.50 219.50 659.50 1077.50 1768.00 10065.00
2009 1936.50 1398.00 1257.50 752.50 446.00 219.50 191.50 131.00 164.00 811.50 837.00 1624.50 9769.50
2010 1602.50 1391.19 a 937.50 545.17 a 328.50 139.50 9.00 f 44.50 381.50 596.00 985.50 1548.50 8500.36
2011 1802.43 c 1408.81 a 1279.00 804.00 435.00 157.50 b 6.09 c 42.50 293.57 b 548.38 b 953.00 1370.00 9100.28
2012 1540.50 1281.70 a 742.00 719.50 279.00 112.24 a 10.50 113.84 b 381.21 a 483.00 i 0.00 z 0.00 z 5180.49
Period of Record Statistics
MEAN 1690.03 1439.05 1244.18 755.40 382.44 140.53 57.68 93.89 296.00 629.43 1055.93 1521.41 9349.96
S.D. 161.16 157.49 158.33 122.28 106.01 57.94 37.80 48.05 66.26 123.37 122.36 161.58 574.62
SKEW 0.22 -0.04 -0.59 0.07 -0.06 0.53 1.24 0.45 0.18 0.15 0.28 0.47 0.10
MAX 2071.50 1872.17 1597.00 1070.50 624.50 318.62 201.00 219.00 486.50 932.67 1385.00 1954.00 10956.18
MIN 1319.50 1027.00 742.00 521.50 126.50 43.50 0.00 15.50 130.00 305.00 767.50 1192.39 7820.00
NO YRS 85 89 90 91 88 92 93 94 90 87 91 82 64