Heating Degree Days
A heating degree day is basically a measure of how cold it has been.
When heating a space, fuel demand varies according to how cold it is.  Degree day units were developed to help in estimating the heat requirements and fuel costs for a building.
When the outside air is above a certain temperature no heat is required.  This is what we refer to as a base temperature.  65º F is used as the base temperature for calculating heating degree-days.
If you take the average daily temperature and subtract it from 65º F you can determine your degree-days.  Each degree accounts for one degree day. 
If today’s High temperature is 50º F and the Low is 30º F our average daily temperature is 40º F. Subtract 40º F from 65º F and you will see that there are 25 degree days for today.
Heating costs are directly proportional to the number of degree days in a year.
Heating Degree Days
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Total
2001 867.0 514.0 563.0 116.0 9.0 2.0 0.0 0.0 62.0 213.0 278.0 571.0 3,195.0
2002 700.0 708.0 467.0 156.0 113.0 1.0 0.0 0.0 1.0 143.0 539.0 729.0 3,557.0
2003 982.0 715.0 424.0 191.0 48.0 11.0 0.0 0.0 51.0 216.0 389.0 830.0 3,857.0
2004 883.0 738.0 406.0 247.0 53.0 2.0 0.0 19.0 27.0 105.0 393.0 817.0 3,690.0
2005 685.0 595.0 541.0 234.0 115.0 0.0 0.0 0.0 8.0 233.0 406.0 839.0 3,656.0
2006 553.0 667.0 442.0 90.0 63.0 0.0 0.0 0.0 49.0 274.0 475.0 597.0 3,210.0
2007 691.0  719 265.0  279 32.0 0.0 0.0 0.0 7.0 137.0  473 542.0 3,145.0
2008 791.0  583  413.0 223  65.0 0.0 0.0 0.0 2.0 239.0  587  725 3,625.0
2009 848.0 606.0 398.0 242.0 43.0 4.0 0.0 0.0 13.0 290.0 500.0 840.0 3,784.0
2010 1,056.0 911.0 601.0 172.0 42.0 0.0 0.0 0.0 31.0 244.0 494.0 1,023.0 4,574.0
2011 1,006.0 616.0 489.0 162.0 107.0 0.0 0.0 0.0 57.0 209.0 333.0 564.0 3,546.0
2012 577.0 521.0 144.0 140.0 8.0 6.0 0.0 0.0 24.0 236.0 513.0 524.0 2,692.0
2013 640.0 586.0 572.0 194.0 78.5 0.0 2.5 0.0 7.0 173.5 569.5 680.5 3,504.0
2014 1,025.5 712.5 557.0 183.5 70.5 0.0 0.0 0.0 6.0 172.5 597.0 642.0 3,966.5
2015 817.5 886.5 396.0 131.5 33.5 0.0 0.0 0.0 17.0 169.0 282.5 394.0 3,127.5
2016 864.0 624.5 302.0 161.5 69.5 0.0 0.0 0.0 21.0 67.0 369.5 700.0 3,179.0
2017 550.5 414.5 390.5 63.0 42.5               1,461.0
2018                          
2019                          
2020                          
Usage in MCF (Thousand Cubic Feet)
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Total
2001 447,937 310,362 329,372 159,110 121,809 97,701 101,791 89,263 111,721 179,515 203,515 311,868 2,463,964
2002 400,958 377,064 298,593 165,558 120,249 99,687 88,683 91,446 92,811 139,783 300,719 399,748 2,575,299
2003 495,624 407,793 274,728 174,472 112,707 103,413 98,672 100,233 109,571 151,979 219,360 428,221 2,676,773
2004 467,503 411,145 256,243 186,041 120,396 122,495 98,417 112,253 100,175 120,535 226,666 417,573 2,639,442
2005 395,355 344,805 330,408 167,032 133,361 106,928 95,890 103,768 100,693 167,280 257,821 439,690 2,643,031
2006 349,180 379,831 280,920 148,884 126,155 103,425 106,542 102,583 103,663 188,588 289,904 356,140 2,535,815
2007 429,627  420,115 226,814  212,025 112,733 96,233  114,796  110,344  103,949 136,216  278,687  320,006 2,561,545
2008 459,068   359,822  292,502   182,738  130,659  110,881  102,081  113,819 115,521  174,036  308,740 383,571 2,733,438
2009 449,829 337,133 271,933 172,481 105,236 106,634 98,303 100,958 111,215 166,159 246,984 422,711 2,589,566
2010 528,353 468,197 354,179 173,382 124,289 111,878 110,130 122,845 119,606 163,181 265,815 505,018 3,046,873
2011 521,738 360,436 294,603 168,053 140,825 129,798 108,061 120,554 131,448 178,922 256,083 342,973 2,753,494
2012 391,771 336,206 196,311 166,260 133,647 121,181 116,979 121,088 116,566 195,657 291,233 333,072 2,520,971
2013 425,089 387,485 375,927 208,934 161,053 125,427 119,797 120,208 126,083 179,533 327,161 391,882 2,948,579
2014 566,254 415,470 347,622 176,880 134,737 124,604 118,977 113,245 118,743 157,684 326,042 359,837 2,960,095
2015 460,611 487,972 303,189 173,915 145,694 114,659 101,957 119,699 117,617 150,876 211,178 266,360 2,653,727
2016 471,152 380,070 256,105 185,427 130,898 104,092 87,109 102,889 95,933 121,743 207,132 357,963 2,500,513
2017 324,071 261,414 265,875 150,460 134,817               1,136,637
2018                          
2019                          
2020                          
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Revised: 5/2/2017