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
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 100.50 428.50 752.50 1012.50 2294.00
1940 1642.00 1159.00 1104.00 556.00 216.50 9.50 0.00 23.00 97.50 273.00 919.00 1183.00 7182.50
1941 1302.50 1217.00 1051.50 316.00 82.00 37.00 0.00 2.50 66.00 323.00 723.00 1036.50 6157.00
1942 1345.00 1193.00 823.50 324.50 228.00 20.50 0.50 10.00 203.00 386.00 806.00 812.00 n 5340.00
1943 1317.00 f 1181.00 1153.50 522.50 244.50 28.00 0.00 3.00 193.00 427.00 948.00 1188.00 5888.50
1944 0.00 z 1127.00 1088.00 597.00 142.60 a 28.50 0.50 5.50 76.50 355.39 c 506.50 i 1344.07 c 4765.06
1945 1502.47 a 1181.50 667.02 a 498.50 312.00 113.00 10.69 b 6.00 149.00 448.00 848.00 1378.90 e 7115.08
1946 1315.50 1134.50 636.00 350.00 228.00 63.50 0.00 21.00 123.62 a 284.50 790.86 a 1188.50 6135.98
1947 1254.00 1352.08 b 1054.52 a 582.50 305.50 72.32 b 4.50 0.00 143.00 172.50 993.50 1272.00 7206.42
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 10.00 0.50 3.00 55.00 429.50 758.50 1272.00 2528.50
1949 1412.50 1255.00 969.50 493.00 128.50 6.50 0.00 5.00 188.00 310.00 771.00 1209.00 6748.00
1950 1408.00 1236.00 1135.00 725.00 211.00 46.50 5.50 33.50 95.50 295.50 998.50 1524.00 7714.00
1951 1604.50 1255.50 1178.00 a 658.50 136.00 48.00 3.62 a 21.00 174.00 422.50 1101.00 1376.00 7978.62
1952 1419.50 1079.50 1097.50 499.00 231.50 19.50 0.00 10.00 120.50 584.50 769.00 1195.50 7026.00
1953 1319.50 1169.00 941.00 660.50 213.50 12.00 1.50 0.00 114.00 267.00 713.00 1172.00 6583.00
1954 1459.00 858.50 1023.00 431.50 337.50 44.00 0.00 2.50 86.00 452.00 747.50 1193.00 6634.50
1955 1396.50 1245.00 1059.50 0.00 z 107.50 25.00 0.00 3.50 101.00 384.00 1010.00 1448.00 6780.00
1956 1451.50 1305.50 1140.00 614.00 216.00 18.00 1.00 15.00 156.50 230.50 872.50 1175.00 7195.50
1957 1564.50 1038.59 a 965.50 471.00 226.82 a 22.00 0.00 9.00 136.00 466.00 873.00 1111.50 6883.91
1958 1301.50 1305.00 947.50 467.50 135.37 a 61.50 1.50 16.50 79.00 315.50 771.00 1457.50 6859.37
1959 1610.50 1352.00 1070.00 498.00 109.50 20.50 5.00 0.00 129.00 568.50 1112.00 1034.00 7509.00
1960 1315.00 1214.50 1294.50 491.00 212.00 44.50 5.50 3.00 114.00 414.00 765.00 1297.00 7170.00
1961 1438.00 1024.00 905.00 658.50 238.00 20.00 0.00 0.00 160.00 337.00 825.50 1363.50 6969.50
1962 1552.50 1276.50 1083.00 571.00 116.50 36.50 5.50 2.50 163.00 334.50 793.00 1294.50 7229.00
1963 1769.50 1367.00 877.50 436.00 218.50 20.00 0.00 16.00 100.50 145.50 699.00 1577.00 7226.50
1964 1227.50 1087.00 1024.50 476.00 95.00 39.00 0.00 48.50 153.50 479.50 768.50 1409.00 6808.00
1965 1536.00 1334.50 1230.00 634.00 122.50 15.00 1.50 39.50 207.50 407.00 824.00 1054.00 7405.50
1966 1712.00 1266.50 849.00 611.50 315.50 36.50 1.00 13.00 151.00 437.00 846.50 1289.00 7528.50
1967 1357.50 1421.00 948.00 494.50 334.50 17.00 26.50 46.50 152.50 508.50 955.00 1221.50 7483.00
1968 1428.00 1331.50 744.00 444.50 280.00 44.00 6.00 20.50 122.50 410.50 865.00 1338.50 7035.00
1969 1601.00 1213.50 1199.50 473.00 211.50 145.50 5.00 0.00 143.50 541.00 893.00 1293.00 7719.50
1970 1716.00 1235.50 1060.00 512.50 193.00 26.00 4.50 4.00 173.50 398.00 872.50 1364.50 7560.00
1971 1723.50 1312.00 1122.50 519.50 271.50 12.00 23.50 20.50 123.50 273.00 843.50 1236.00 7481.00
1972 1647.00 1434.00 1126.50 654.00 175.50 72.50 19.50 32.00 134.00 563.00 908.00 1508.00 8274.00
1973 1369.50 1126.50 724.50 595.50 296.50 8.50 0.00 6.00 137.50 270.50 835.50 1371.50 6742.00
1974 1478.50 1260.00 984.00 496.00 309.00 60.00 0.00 18.00 231.50 421.50 820.00 1200.50 7279.00
1975 1428.50 1287.00 1222.50 711.00 163.50 54.50 17.00 0.50 204.00 341.00 713.00 1245.50 7388.00
1976 1511.00 1021.50 898.50 433.50 241.00 9.50 3.00 25.00 181.00 612.50 1089.00 1605.00 7630.50
1977 1944.00 1194.00 768.50 338.50 74.50 50.00 0.00 44.50 115.50 468.00 909.00 1440.50 7347.00
1978 1784.50 1495.50 1096.00 549.00 210.50 29.00 4.50 5.50 94.00 487.50 901.00 1405.00 8062.00
1979 1861.50 1474.50 1038.50 642.50 248.50 16.00 0.50 33.50 84.50 477.00 890.50 1127.50 7895.00
1980 1458.00 1383.00 1095.00 504.00 171.50 29.00 0.00 3.00 115.18 b 537.50 798.00 1287.50 7381.68
1981 1381.00 1094.50 838.00 404.00 233.50 11.00 8.00 8.00 150.00 a 526.00 798.00 1358.50 6810.50
1982 1819.00 1296.50 1048.00 649.00 124.50 84.00 0.00 21.00 151.00 384.00 870.50 1069.50 a 7517.00
1983 1271.50 1008.00 903.00 634.00 306.00 39.00 2.50 0.00 136.00 422.50 815.00 1700.00 7237.50
1984 1500.50 1011.50 1144.50 498.50 271.00 3.50 4.50 4.50 172.00 357.00 886.50 1288.00 7142.00
1985 1632.00 1326.00 853.50 374.00 88.50 64.00 0.00 9.50 178.00 393.50 1052.50 1681.50 7653.00
1986 1407.00 1262.00 844.00 388.50 144.00 18.50 2.00 27.50 107.50 403.00 1003.50 1213.00 6820.50
1987 1303.50 947.50 797.00 359.48 a 125.50 10.00 1.50 25.00 94.50 562.50 731.50 1132.00 6089.98
1988 1573.00 1394.00 891.00 492.00 93.00 10.00 2.00 9.00 85.50 598.00 819.50 1283.50 7250.50
1989 1176.00 1414.00 1074.50 550.00 221.00 45.50 0.00 2.00 162.50 397.50 970.00 1573.00 7586.00
1990 1109.50 1076.00 843.50 507.50 272.50 32.00 2.50 2.00 115.50 450.50 693.00 1387.00 6491.50
1991 1585.00 1091.50 873.00 440.50 177.00 5.00 2.00 3.00 199.50 483.00 1109.00 1235.00 7203.50
1992 1228.63 a 1010.50 930.00 588.00 187.50 58.50 21.50 36.00 155.00 459.50 958.50 1273.00 6906.63
1993 1444.50 1307.00 1063.50 607.50 142.50 j 32.00 0.00 10.50 225.50 489.00 905.00 1224.00 7308.50
1994 1768.00 1431.50 912.00 510.00 192.00 24.50 6.00 34.00 93.50 365.00 733.00 1137.50 7207.00
1995 1397.50 1166.00 875.50 635.00 215.50 13.00 10.50 0.00 178.00 452.00 1057.00 1371.00 7371.00
1996 1646.00 1291.50 1137.50 608.00 315.50 36.00 4.00 0.50 156.50 419.00 1068.00 1394.50 8077.00
1997 1547.00 1119.50 968.50 583.50 325.00 14.00 11.00 24.00 86.00 438.00 963.50 1122.00 7202.00
1998 1295.50 887.00 926.00 397.50 78.50 86.00 0.00 0.00 42.50 368.50 721.50 1093.00 5896.00
1999 1553.50 945.50 908.50 417.00 135.50 43.50 0.00 5.50 144.50 425.50 648.50 1169.00 6396.50
2000 1411.00 998.00 710.50 465.00 160.50 40.00 5.50 0.00 z 134.50 335.50 908.00 1683.50 6852.00
2001 1333.00 1315.00 1067.50 412.00 173.00 70.50 5.00 0.00 153.50 481.00 493.00 1069.50 6573.00
2002 1102.50 933.00 1082.50 520.50 284.50 25.50 0.00 0.00 93.00 589.00 886.50 1140.50 6657.50
2003 1463.50 1289.00 991.00 528.50 215.00 39.00 1.00 1.50 174.00 426.00 871.50 1160.50 7160.50
2004 1506.00 1184.50 827.50 449.50 205.00 49.50 10.00 43.00 61.50 403.00 745.00 1230.00 6714.50
2005 1459.00 1021.50 1002.00 378.00 243.00 0.00 0.00 0.50 50.50 372.50 771.00 1380.00 6678.00
2006 997.50 1141.00 895.00 329.00 222.50 19.00 0.00 0.00 158.50 543.00 747.00 1040.00 6092.50
2007 1269.00 1423.00 798.00 518.00 91.50 10.50 0.00 3.00 79.50 270.00 860.00 1376.50 6699.00
2008 1515.50 1394.00 1060.50 533.00 233.50 7.00 0.00 1.00 68.00 425.00 853.50 1518.48 a 7609.48
2009 1697.50 1111.50 879.00 492.00 180.50 54.50 10.50 18.50 55.50 603.50 631.50 1341.50 7076.00
2010 1527.50 1215.00 737.00 278.00 186.00 0.50 0.00 0.00 94.50 320.50 783.00 1431.00 6573.00
2011 1546.00 1243.50 978.00 509.50 211.83 a 11.25 b 0.00 0.00 a 180.00 a 366.50 727.00 1065.00 6838.58
2012 1226.50 1020.00 455.00 396.00 79.00 14.50 0.00 7.50 160.00 306.00 i 0.00 z 0.00 z 3358.50
Period of Record Statistics
MEAN 1469.44 1205.18 968.21 506.54 201.45 33.73 3.68 12.07 131.69 413.93 849.63 1289.46 7108.83
S.D. 187.27 149.71 155.80 101.50 71.64 26.47 5.83 13.53 44.28 100.57 122.00 164.58 511.19
SKEW 0.12 -0.25 -0.55 -0.05 0.00 1.58 2.24 1.13 0.05 -0.16 0.16 0.53 -0.16
MAX 1944.00 1495.50 1294.50 725.00 337.50 145.50 26.50 48.50 231.50 612.50 1112.00 1700.00 8274.00
MIN 997.50 858.50 455.00 278.00 74.50 0.00 0.00 0.00 42.50 145.50 493.00 1012.50 5896.00
NO YRS 70 72 72 71 71 73 73 72 74 73 72 72 65