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
1954 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 70.50 r 508.29 b 840.50 1281.69 b 2630.48
1955 1472.50 a 1306.15 a 1120.50 377.00 173.00 67.50 0.50 13.50 177.50 459.00 1009.62 d 1457.00 7633.76
1956 1448.50 1316.50 1164.00 676.55 a 296.50 32.59 a 19.52 d 36.00 252.00 358.50 901.67 c 1278.48 b 7780.81
1957 1664.70 a 1127.00 1007.50 362.00 f 308.50 38.00 3.50 30.48 a 242.31 d 601.29 b 960.50 1225.53 a 7209.32
1958 1423.33 b 1397.50 1046.00 579.50 256.00 135.50 8.00 r 41.00 152.00 382.16 b 816.00 1531.83 b 7760.81
1959 1702.93 a 1401.62 b 1159.29 b 585.50 153.50 27.50 13.00 0.00 176.90 a 656.34 b 724.00 l 764.50 j 5876.58
1960 1381.00 1290.00 1092.50 g 504.44 c 321.00 84.00 19.38 c 18.00 182.50 528.00 861.50 1412.50 6602.32
1961 1177.00 h 1095.77 b 959.50 704.50 326.00 51.67 c 6.00 13.00 243.00 e 461.00 901.00 1420.00 6181.44
1962 1659.50 1376.67 d 1167.15 a 624.00 196.00 65.00 21.50 17.00 249.50 452.50 916.50 1070.50 h 6745.32
1963 1866.00 1508.50 1065.50 539.00 384.50 54.50 10.00 42.50 189.50 216.50 801.00 1633.50 8311.00
1964 1340.50 1203.50 1128.50 579.00 145.00 83.00 16.50 76.50 255.50 593.50 852.00 1507.00 7780.50
1965 1612.50 1391.50 1303.50 720.00 205.50 65.50 33.00 84.50 268.00 524.50 929.50 1135.12 a 8273.12
1966 1752.00 1298.50 968.00 711.00 389.50 75.00 4.50 47.00 209.00 540.00 945.00 1391.00 8330.50
1967 1415.00 1475.00 1086.00 633.00 460.00 28.00 50.00 96.00 212.50 571.50 1011.00 1302.50 8340.50
1968 1489.50 1427.00 835.00 533.50 358.00 88.50 38.50 57.00 179.50 502.00 933.50 1405.50 7847.50
1969 1603.00 1220.50 1240.50 537.00 278.50 234.00 13.50 15.50 218.50 636.00 995.50 1365.00 8357.50
1970 1745.00 1323.50 1163.00 592.50 288.00 37.00 11.50 11.37 a 153.50 415.00 0.00 z 1333.00 7073.37
1971 1713.50 1281.00 1166.78 b 587.50 307.00 24.50 13.95 a 22.00 109.00 267.00 893.00 0.00 z 6385.23
1972 1632.50 1353.00 1164.50 667.50 172.00 69.00 27.00 25.50 142.00 558.00 914.50 1428.50 8154.00
1973 1326.28 a 1171.50 766.50 446.50 j 307.42 a 6.50 0.00 8.00 167.50 299.00 868.50 1306.00 6227.20
1974 1401.50 1247.00 965.50 500.50 281.67 b 59.50 2.50 17.50 184.50 432.00 796.00 1158.50 7046.67
1975 1394.50 1230.00 1152.50 728.00 130.00 36.50 10.50 9.00 239.50 401.97 a 699.00 1251.00 7282.47
1976 1594.50 1103.00 936.50 506.00 304.50 17.00 3.50 38.50 217.00 643.50 1124.50 1660.00 8148.50
1977 1916.50 1216.50 797.00 376.80 e 103.50 71.50 2.00 69.50 116.50 472.00 884.48 a 1414.50 7440.78
1978 1687.00 1460.00 1102.50 606.50 220.50 31.00 9.09 b 2.38 e 94.50 509.50 887.50 1391.50 8001.97
1979 1845.00 1504.50 994.00 641.50 272.50 34.00 8.00 46.50 a 115.50 592.10 a 897.32 b 1121.00 8071.92
1980 1466.30 a 1416.00 1134.00 526.50 186.00 64.00 1.50 6.20 a 0.00 z 0.00 z 0.00 z 0.00 z 4800.50
1981 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1982 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4.50 77.50 266.00 38.00 y 0.00 z 0.00 z 348.00
1983 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3.00 v 134.50 l 574.00 915.52 a 1806.00 3295.52
1984 1645.50 1120.50 1253.50 598.00 375.00 14.50 15.50 14.50 236.00 422.00 888.50 1266.50 7850.00
1985 1616.00 1370.50 892.00 486.00 150.50 104.50 14.00 62.00 244.50 557.00 1084.14 a 1724.00 8305.14
1986 1491.00 1288.00 944.50 449.00 203.00 49.50 14.50 61.50 170.50 509.00 1039.00 1271.50 7491.00
1987 1338.00 1009.50 874.50 467.00 224.00 25.00 8.50 41.50 130.50 683.00 799.00 1163.50 6764.00
1988 1652.00 1432.50 992.50 575.00 167.00 49.00 8.50 25.50 124.00 681.00 844.50 1344.50 7896.00
1989 1276.50 1440.50 1194.50 634.50 290.50 72.00 12.00 10.00 222.93 a 478.50 1013.00 1686.00 8330.93
1990 1163.00 1174.00 889.00 548.50 380.50 60.00 11.50 34.00 147.50 593.50 774.50 1412.00 7188.00
1991 1635.50 1161.00 958.50 498.00 213.00 26.50 19.00 34.00 258.00 534.50 1090.50 1291.00 7719.50
1992 1294.50 1088.50 1010.50 698.50 271.00 109.50 38.00 93.50 231.50 562.00 988.50 1329.00 7715.00
1993 1478.00 1317.00 1089.00 721.50 243.00 89.50 5.50 17.00 325.00 579.50 959.50 1276.50 8101.00
1994 1832.50 1460.50 989.00 572.50 270.50 56.50 25.00 48.50 118.00 423.50 788.00 1159.50 7744.00
1995 1461.00 1242.50 958.00 741.00 292.50 33.50 15.50 0.50 247.50 492.00 1147.50 1451.50 8083.00
1996 1606.00 1368.50 1216.00 727.00 411.00 61.50 21.00 28.50 170.50 486.50 1113.00 1376.50 8586.00
1997 1579.50 1159.00 997.50 638.00 399.50 40.00 27.00 56.00 144.50 499.50 971.50 1133.50 7645.50
1998 1322.50 910.50 963.50 501.50 124.00 101.00 4.50 1.50 80.00 435.50 764.00 1130.00 6338.50
1999 1575.50 1001.50 958.00 496.00 184.50 68.50 0.50 27.50 194.00 532.50 685.00 1269.50 6993.00
2000 1459.50 1081.50 773.50 604.00 220.50 62.50 18.00 11.50 199.50 382.00 922.00 1692.50 7427.00
2001 1369.00 1303.00 1066.50 457.00 217.50 97.50 15.50 7.50 206.00 516.00 591.00 1100.00 6946.50
2002 1208.00 1004.50 1146.50 602.00 358.50 52.50 2.00 6.50 107.00 632.00 934.50 1209.50 7263.50
2003 1522.50 1361.00 1026.50 627.50 296.00 74.50 14.50 3.00 177.50 511.00 893.00 1179.50 7686.50
2004 1608.50 1245.00 885.00 542.50 315.00 91.50 28.50 103.00 87.00 469.50 787.50 1316.50 7479.50
2005 1523.50 1066.50 1103.50 463.00 330.00 17.50 15.50 15.50 95.00 478.00 865.50 1438.00 7411.50
2006 1099.00 1239.50 965.50 430.50 274.00 47.50 4.00 7.00 236.00 634.50 799.00 1121.00 6857.50
2007 1290.50 1429.50 897.50 625.00 188.00 39.00 9.00 21.50 155.00 359.00 910.50 1436.85 a 7361.35
2008 1540.18 a 1493.50 1173.50 586.50 342.50 31.50 6.50 20.50 0.00 z 542.50 895.50 1575.50 8208.18
2009 1767.00 1189.50 1057.50 626.50 250.00 93.50 41.00 46.00 117.00 670.00 703.00 1378.00 7939.00
2010 1514.00 1189.50 845.50 418.50 242.00 31.00 2.00 11.00 211.00 440.00 855.50 1461.00 7221.00
2011 1580.00 1271.00 1102.00 660.50 314.50 72.50 0.50 4.50 239.50 453.00 827.00 1157.50 7682.50
2012 1327.00 1059.02 a 543.50 564.00 154.00 49.00 1.55 a 29.00 233.00 384.50 j 0.00 z 0.00 z 3960.07
Period of Record Statistics
MEAN 1524.62 1265.80 1025.20 577.30 264.12 60.03 13.50 31.51 187.45 503.86 896.02 1357.07 7693.67
S.D. 182.03 147.42 144.12 93.00 82.72 36.40 11.41 26.65 56.74 101.76 113.31 172.24 507.56
SKEW -0.05 -0.29 -0.65 -0.16 0.10 2.09 1.17 1.02 -0.07 -0.46 -0.02 0.63 -0.47
MAX 1916.50 1508.50 1303.50 741.00 460.00 234.00 50.00 103.00 325.00 683.00 1147.50 1806.00 8586.00
MIN 1099.00 910.50 543.50 376.80 103.50 6.50 0.00 0.00 80.00 216.50 591.00 1100.00 6338.50
NO YRS 54 55 54 53 55 55 55 56 54 55 53 52 43