| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 5°F | 28°F | 17°F | 1.7" |
| February | 6°F | 30°F | 18°F | 1.8" |
| March | 15°F | 40°F | 27°F | 2.0" |
| April | 28°F | 55°F | 41°F | 3.0" |
| May | 39°F | 68°F | 54°F | 3.9" |
| June | 48°F | 75°F | 61°F | 5.0" |
| July | 53°F | 80°F | 66°F | 4.5" |
| August | 51°F | 78°F | 64°F | 5.0" |
| September | 44°F | 72°F | 57°F | 3.0" |
| October | 35°F | 59°F | 46°F | 3.7" |
| November | 24°F | 46°F | 34°F | 2.2" |
| December | 13°F | 33°F | 23°F | 3.1" |
| Index | Rumford | Maine | National |
| Air quality index | 40 | 33 | 42 |
| Pollution index | 2,398,170 | 3,417,521 | 2,726,193 |
| Measurement | Total |
| Days measured | 324 |
| Days with good air quality | 314 |
| Days with moderate air quality | 10 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Dixfield, ME | 1,388 | 31 | 38.0% |
| Mexico, ME | 1,957 | 40 | 20.0% |
| Rumford, ME | 3,931 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Portland, MI | 3,931 | 36 | 28.0% |
| Oracle, AZ | 3,932 | 47 | 6.0% |
| Skippack, PA | 3,928 | 51 | 2.0% |
| Potosi, TX | 3,928 | 33 | 34.0% |
| Presidio, TX | 3,928 | 47 | 6.0% |
| Rumford, ME | 3,931 | 40 | 20.0% |
Here are the best places to live in Maine
10 Best cities in Maine for employment
Check out the 10 safest cities in Maine
Top 10 cities in Maine with the best education system