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
1972 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 23.00 79.50 454.00 665.50 823.50 2045.50
1973 1027.50 943.50 760.50 586.00 406.00 93.50 23.00 6.50 108.50 313.00 626.50 780.00 5674.50
1974 953.00 951.50 863.50 565.50 422.00 164.00 12.00 0.50 83.50 452.00 609.50 840.50 5917.50
1975 900.50 910.00 898.50 693.00 351.00 136.50 7.00 11.50 114.50 286.50 472.00 878.00 5659.00
1976 1118.00 860.00 823.00 513.50 328.50 92.50 2.00 21.50 97.00 421.00 746.00 1072.50 6095.50
1977 1258.00 986.50 777.00 554.50 327.50 145.00 11.00 14.50 135.00 362.50 550.00 932.50 6054.00
1978 1079.00 1049.00 949.50 646.00 407.00 104.00 38.00 10.50 166.50 400.00 586.00 904.50 6340.00
1979 983.50 1160.00 814.50 623.50 287.50 135.00 11.50 41.50 120.00 393.50 488.50 825.00 5884.00
1980 1027.00 1059.50 893.50 572.50 352.00 153.50 10.00 5.00 81.50 400.00 686.50 1041.50 6282.50
1981 1301.00 837.00 874.50 535.00 376.50 62.50 3.00 18.00 112.00 426.50 618.50 911.50 6076.00
1982 1230.50 921.00 857.50 660.50 364.50 201.00 9.50 34.50 109.00 351.00 522.50 748.00 6009.50
1983 969.00 858.00 791.50 593.50 396.50 106.50 2.50 18.00 62.00 322.50 538.00 937.50 5595.50
1984 1042.50 806.50 982.00 639.00 320.50 92.50 18.00 0.50 131.50 311.00 584.50 753.00 5681.50
1985 1143.00 889.00 817.50 0.00 z 345.50 114.50 19.00 20.50 78.00 295.00 509.00 962.50 5193.50
1986 1003.00 952.50 823.00 579.00 0.00 z 121.00 25.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3503.50
1987 1008.00 995.50 866.00 599.50 397.00 99.00 21.50 0.00 z 89.00 390.50 0.00 z 868.00 5334.00
1988 1099.00 917.00 852.50 600.00 382.00 133.50 12.00 14.00 104.00 441.50 561.00 949.00 6065.50
1989 948.00 947.00 881.95 a 619.50 0.00 z 86.00 20.50 11.00 95.50 326.00 630.50 1242.50 5808.45
1990 881.00 858.15 a 838.50 598.00 406.00 130.50 25.00 1.00 96.50 256.50 574.00 763.63 a 5428.78
1991 990.00 841.50 776.00 543.10 a 253.00 70.50 0.00 z 9.50 124.00 303.00 565.00 848.76 b 5324.36
1992 0.00 z 937.00 936.50 687.00 425.22 a 96.00 51.00 0.00 z 123.50 400.00 0.00 z 862.00 4518.22
1993 977.50 1031.00 899.00 621.00 324.00 94.50 14.50 3.00 97.50 389.00 569.50 888.50 5909.00
1994 1200.00 1005.00 858.00 530.00 394.50 72.00 2.50 10.00 94.66 a 337.50 465.00 768.00 5737.16
1995 0.00 z 932.50 0.00 z 0.00 z 429.50 108.00 1.00 2.00 92.00 216.50 628.50 997.68 a 3407.68
1996 1000.50 1012.00 940.85 a 607.50 367.50 74.00 21.50 12.00 91.50 303.50 659.00 733.15 a 5823.00
1997 1093.50 803.00 852.50 616.00 377.00 132.50 0.00 8.50 82.00 351.50 639.00 870.50 5826.00
1998 862.00 762.74 a 743.48 a 555.00 324.50 0.00 z 2.00 0.00 z 48.50 343.00 579.00 787.00 5007.22
1999 981.50 822.00 0.00 z 562.50 304.50 57.00 4.00 6.00 50.50 345.00 534.83 a 811.50 4479.33
2000 1100.50 885.54 a 736.00 553.00 310.00 95.00 7.00 6.50 0.00 z 360.00 624.00 0.00 z 4677.54
2001 1005.50 193.00 v 407.00 o 593.00 305.50 35.00 8.00 2.00 67.00 277.50 503.00 729.50 3526.00
2002 863.50 815.11 a 787.50 0.00 z 358.00 123.50 5.00 2.50 37.00 358.00 664.14 a 930.00 4944.25
2003 0.00 z 1017.50 883.00 710.50 413.00 146.50 0.50 4.50 62.50 333.00 563.50 873.00 5007.50
2004 1312.00 997.00 880.00 620.00 353.50 118.50 15.00 25.00 0.00 z 318.50 568.97 a 825.67 e 6034.14
2005 1087.00 924.50 969.50 584.00 477.00 117.50 22.50 0.00 29.00 293.00 542.00 942.00 5988.00
2006 0.00 z 923.00 869.00 535.50 0.00 z 75.00 0.00 4.00 61.50 336.50 441.50 726.00 3972.00
2007 950.50 1066.50 885.50 640.00 293.50 84.00 3.50 4.00 37.00 211.50 617.50 929.50 5723.00
2008 964.50 898.50 845.50 563.00 368.50 46.50 0.00 2.50 33.50 290.50 i 649.50 859.00 5231.00
2009 1177.00 941.50 891.00 355.50 m 350.50 194.00 28.00 5.00 88.50 406.50 480.50 951.00 5513.50
2010 1094.00 938.00 743.50 503.50 260.50 77.00 0.00 8.50 60.00 323.50 608.50 995.00 5612.00
2011 1105.00 973.00 870.00 556.00 363.50 101.00 1.50 0.50 50.50 258.00 484.00 760.00 5523.00
2012 929.00 839.50 720.50 493.50 300.50 53.00 o 0.00 0.00 a 58.00 184.00 i 0.00 z 0.00 z 3341.00
Period of Record Statistics
MEAN 1046.25 929.95 850.06 590.35 357.40 107.61 11.74 9.95 85.58 343.89 577.17 876.88 5859.32
S.D. 117.06 85.49 65.49 52.01 50.14 36.81 11.68 9.77 31.55 60.61 69.58 108.11 240.04
SKEW 0.59 0.31 -0.12 0.35 0.00 0.48 1.27 1.43 0.18 -0.12 0.06 1.00 0.20
MAX 1312.00 1160.00 982.00 710.50 477.00 201.00 51.00 41.50 166.50 454.00 746.00 1242.50 6340.00
MIN 862.00 762.74 720.50 493.50 253.00 35.00 0.00 0.00 29.00 211.50 441.50 726.00 5428.78
NO YRS 36 39 37 36 37 38 39 37 38 38 37 38 22