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 199803
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
1959 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 221.79 b 663.50 1201.55 a 1152.50 3239.34
1960 1423.00 1319.50 1413.50 614.50 357.50 137.00 63.00 41.50 240.50 582.00 859.50 1460.10 a 8511.60
1961 1568.00 1139.50 1000.50 756.00 453.00 118.50 45.50 59.50 253.00 520.00 991.00 1477.50 8382.00
1962 1666.00 1432.00 1174.00 684.00 231.50 115.00 48.50 68.00 316.00 484.50 919.50 1425.50 8564.50
1963 1832.50 1536.50 1116.50 586.50 398.00 85.50 33.50 86.50 226.00 309.00 799.50 1563.50 8573.50
1964 1357.00 1264.00 1156.50 621.50 219.50 129.50 19.50 125.00 279.00 607.50 840.50 1482.00 8101.50
1965 1588.00 1390.50 1294.00 764.50 243.50 153.00 67.50 91.50 306.00 506.50 958.50 1154.50 8518.00
1966 1704.50 1255.00 984.50 744.50 504.50 109.00 19.50 79.50 269.00 551.59 b 945.50 1390.00 8557.09
1967 1434.00 1516.00 1167.50 660.00 508.50 67.00 72.00 116.00 272.00 594.00 1043.50 1368.50 8819.00
1968 1551.00 1415.00 881.50 619.50 393.50 118.00 55.50 116.50 168.00 476.00 944.00 1404.50 8143.00
1969 1581.00 1290.50 1271.00 a 601.50 345.00 247.00 49.00 24.00 267.50 593.00 996.50 1345.00 8611.00
1970 1737.50 1384.00 1232.00 633.00 321.50 83.50 26.50 41.50 206.50 502.50 993.50 1410.50 8572.50
1971 1756.00 1400.00 1302.50 718.00 419.00 72.00 66.00 101.50 197.50 355.00 933.50 1335.00 8656.00
1972 1760.50 1543.50 1313.50 848.00 252.00 126.50 52.50 70.00 267.00 665.00 976.00 1515.50 9390.00
1973 1445.00 1250.00 850.00 689.50 428.00 43.00 12.00 32.00 253.50 385.00 960.50 1434.50 7783.00
1974 1545.00 1397.50 1103.00 593.50 444.00 165.00 24.50 46.00 367.00 588.00 920.50 1281.00 8475.00
1975 1477.50 1319.50 1287.50 858.50 239.50 103.00 39.00 54.00 341.50 487.00 826.00 1408.00 8441.00
1976 1656.00 1160.00 1126.00 592.00 413.50 48.00 16.00 99.00 290.00 710.00 1190.00 1738.50 9039.00
1977 1857.00 1269.50 919.50 522.50 157.50 140.00 14.50 102.00 191.50 554.50 950.00 1453.00 8131.50
1978 1630.00 1486.50 1205.50 729.50 295.50 113.50 49.50 38.50 167.00 568.00 982.00 1505.50 8771.00
1979 1786.00 1574.50 1110.00 745.00 406.00 105.00 24.00 59.50 184.00 603.50 984.00 1214.00 8795.50
1980 1518.48 a 1422.50 1197.00 569.50 251.00 110.00 13.50 22.50 226.00 685.00 918.50 1427.00 8360.98
1981 1581.50 1203.00 952.50 567.50 370.50 55.00 34.50 26.00 253.50 661.50 865.50 1357.50 7928.50
1982 1841.50 1395.00 1151.50 756.50 151.50 198.50 8.50 89.00 252.50 484.50 960.50 1172.50 8462.00
1983 1392.50 1036.50 1016.00 707.00 475.00 110.50 10.00 7.50 203.00 532.50 868.00 1694.50 8053.00
1984 1652.00 1078.00 1243.00 606.00 385.00 37.50 19.00 26.50 246.50 462.00 939.50 1348.00 8043.00
1985 1607.00 1355.50 965.00 540.50 182.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4650.00
1986 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 110.00 26.50 98.50 242.00 606.50 1121.50 1317.50 3522.50
1987 1408.00 1152.00 958.00 515.50 279.50 60.50 34.00 72.50 196.00 746.50 868.50 1223.00 7514.00
1988 1737.00 1534.00 1099.97 b 644.00 235.00 93.50 12.00 49.50 210.50 746.00 899.00 1434.00 8694.46
1989 1415.50 1498.50 1328.50 736.50 349.50 138.00 22.00 48.50 265.00 550.00 1113.00 1766.00 9231.00
1990 1335.50 1309.50 1040.50 578.50 430.00 94.00 46.00 61.50 217.00 641.00 861.00 1451.50 8066.00
1991 1705.50 1234.50 1073.50 549.50 266.00 46.00 51.50 33.00 317.50 623.50 1122.50 1378.50 8401.50
1992 1395.00 1190.50 1124.50 758.00 315.00 159.00 90.00 122.50 291.50 631.00 1047.50 1338.17 a 8462.67
1993 1584.50 1378.00 1114.00 789.50 327.50 141.50 9.50 37.50 371.50 674.00 1024.00 1327.50 8779.00
1994 1898.50 1515.50 1067.50 668.50 322.00 79.50 42.50 93.00 169.00 513.00 855.50 1219.00 8443.50
1995 1442.00 1335.50 1037.50 827.00 343.00 56.50 27.00 4.00 302.00 548.50 1204.00 1533.50 8660.50
1996 1711.00 1480.00 1323.50 799.50 441.00 115.00 50.50 35.00 220.00 611.50 1122.00 1405.50 9314.50
1997 1632.50 1256.50 1166.00 711.50 512.50 74.00 54.50 121.00 194.50 594.00 1041.00 1203.50 8561.50
1998 1404.00 979.50 1066.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3449.50
Period of Record Statistics
MEAN 1595.20 1334.16 1127.20 673.16 342.35 106.97 36.47 64.86 249.01 568.87 974.92 1397.80 8494.77
S.D. 155.62 149.28 136.07 94.71 99.61 44.49 20.58 34.67 52.99 98.50 106.47 145.55 400.96
SKEW 0.11 -0.41 -0.01 0.17 -0.11 0.80 0.51 0.17 0.48 -0.51 0.59 0.52 0.03
MAX 1898.50 1574.50 1413.50 858.50 512.50 247.00 90.00 125.00 371.50 746.50 1204.00 1766.00 9390.00
MIN 1335.50 979.50 850.00 515.50 151.50 37.50 8.50 4.00 167.00 309.00 799.50 1152.50 7514.00
NO YRS 38 38 38 37 37 37 37 37 38 38 38 38 36