| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 33°F | 24°F | 4.5" |
| February | 16°F | 33°F | 24°F | 5.0" |
| March | 23°F | 41°F | 32°F | 4.4" |
| April | 34°F | 52°F | 43°F | 4.7" |
| May | 44°F | 62°F | 52°F | 5.9" |
| June | 52°F | 69°F | 60°F | 6.7" |
| July | 59°F | 76°F | 67°F | 6.3" |
| August | 57°F | 75°F | 66°F | 5.4" |
| September | 51°F | 69°F | 60°F | 7.3" |
| October | 42°F | 58°F | 50°F | 7.6" |
| November | 32°F | 47°F | 40°F | 7.5" |
| December | 22°F | 37°F | 29°F | 5.4" |
| Index | Ellsworth | Maine | National |
| Air quality index | 31 | 33 | 42 |
| Pollution index | 3,235,100 | 3,417,521 | 2,726,193 |
| Measurement | Total |
| Days measured | 361 |
| Days with good air quality | 348 |
| Days with moderate air quality | 13 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Bar Harbor, ME | 2,163 | 31 | 38.0% |
| Blue Hill, ME | 1,216 | 31 | 38.0% |
| Ellsworth, ME | 8,085 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Oak Brook, IL | 8,085 | 55 | 10.0% |
| Garden City Park, NY | 8,087 | 51 | 2.0% |
| Bel Aire, KS | 8,082 | 40 | 20.0% |
| Northfield, NJ | 8,088 | 37 | 26.0% |
| Bellevue, PA | 8,088 | 56 | 12.0% |
| Ellsworth, ME | 8,085 | 31 | 38.0% |
Here are the best places to live in Maine
Check out the 10 safest cities in Maine
10 Best cities in Maine for employment
See the best places to live in & around Ellsworth