Degree Days to Selected Base Temperatures (F)
Base                      Heating Degree Days
Below  Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec   Ann
   65  662  505  351  139   28    2    0    0   13  136  374  602  2812
   60  511  372  226   66    6    0    0    0    3   61  245  455  1945
   57  426  299  165   38    2    0    0    0    1   33  180  372  1516
   55  371  253  130   25    0    0    0    0    0   20  142  320  1261
   50  246  155   64    7    0    0    0    0    0    4   71  201   748


Base                      Cooling Degree Days
Above  Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec   Ann
   55   19   31   98  230  443  614  721  696  520  246   73   27  3718
   57   12   20   71  184  382  554  659  634  461  197   50   18  3242
   60    4    9   40  123  294  464  567  542  372  132   26    8  2581
   65    0    1   10   47  161  316  413  387  232   52    5    1  1625
   70    0    0    1    8   60  174  259  234  113   12    1    0   862
 
Derived from the 1948-1998 Data