| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 36°F | 25°F | 3.2" |
| February | 15°F | 37°F | 26°F | 4.2" |
| March | 24°F | 44°F | 34°F | 4.0" |
| April | 34°F | 57°F | 45°F | 5.0" |
| May | 44°F | 67°F | 55°F | 4.5" |
| June | 53°F | 75°F | 63°F | 5.8" |
| July | 60°F | 82°F | 70°F | 4.3" |
| August | 58°F | 80°F | 69°F | 4.4" |
| September | 51°F | 74°F | 62°F | 4.1" |
| October | 41°F | 62°F | 51°F | 6.9" |
| November | 31°F | 52°F | 41°F | 4.4" |
| December | 21°F | 40°F | 30°F | 5.3" |
| Index | Oakdale | Portland | Maine |
| Air quality index | 40 | 40 | 33 |
| Pollution index | 2,043,700 | 2,043,700 | 3,417,521 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 308 |
| Days with moderate air quality | 56 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.003% |
| Lead | 0.030% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Old Orchard Beach, ME | 8,952 | 40 | 20.0% |
| Westbrook, ME | 18,935 | 40 | 20.0% |
| Falmouth, ME | 1,877 | 40 | 20.0% |
| Scarborough, ME | 5,268 | 40 | 20.0% |
| Saco, ME | 19,716 | 40 | 20.0% |
| Portland, ME | 66,706 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| West Des Moines, IA | 66,724 | 39 | 22.0% |
| Redondo Beach, CA | 66,663 | 72 | 44.0% |
| Yuba City, CA | 66,660 | 44 | 12.0% |
| Oshkosh, WI | 66,753 | 36 | 28.0% |
| Kenner, LA | 66,759 | 45 | 10.0% |
| Portland, ME | 66,706 | 40 | 20.0% |
Here are the best places to live in Maine
Most Dangerous Cities In The US
These are the largest cities in Maine
Check out the 10 most dangerous cities in Maine