BANGOR, Maine (WABI) - As Earth experiences record-breaking average temperatures this week, Mainers are feeling the heat, too. Goo Goo Dolls with Fitz and the Tantrums, Sept. Cross Insurance Arena, Portland, $59 to $119. Do you or anyone you know have a.Bill Burr, Sept. (See detailed definition below.) HDD = heating degree days CDD = cooling degree days APHollywood Casino Hotel & Raceway Bangor, Bangor, Maine. The following heating and cooling degree day normals by month for forty-nine locations in Maine, one aspect of the climate, are calculated by recording the difference between the mean temperature for a month and 65 degrees as the base temperature. The coldest month, January has days with. For comparison, the hottest month in Bangor, July, has days with highs of 79☏ (26☌) and lows of 59☏ (15☌). Some would describe it as moderately chilly with a gentle breeze. The average temperature in Bangor in October for a typical day ranges from a high of 58☏ (15☌) to a low of 42☏ (5☌).