| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 32°F | 22°F | 4.9" |
| February | 14°F | 33°F | 23°F | 5.4" |
| March | 22°F | 42°F | 32°F | 6.5" |
| April | 34°F | 55°F | 44°F | 6.8" |
| May | 44°F | 66°F | 55°F | 5.8" |
| June | 53°F | 73°F | 63°F | 9.6" |
| July | 59°F | 80°F | 69°F | 8.9" |
| August | 56°F | 79°F | 67°F | 6.4" |
| September | 49°F | 72°F | 60°F | 7.0" |
| October | 39°F | 60°F | 49°F | 9.0" |
| November | 29°F | 48°F | 38°F | 7.0" |
| December | 19°F | 36°F | 27°F | 5.4" |
| Index | Auburn | Maine | National |
| Air quality index | 31 | 33 | 42 |
| Pollution index | 2,712,920 | 3,417,521 | 2,726,193 |
| Measurement | Total |
| Days measured | 361 |
| Days with good air quality | 345 |
| Days with moderate air quality | 16 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.050% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| Brunswick, ME | 15,974 | 31 | 38.0% |
| Oxford, ME | 1,026 | 31 | 38.0% |
| Lisbon Falls, ME | 4,079 | 31 | 38.0% |
| Topsham, ME | 6,246 | 31 | 38.0% |
| South Paris, ME | 1,842 | 31 | 38.0% |
| Auburn, ME | 23,267 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Loves Park, IL | 23,274 | 42 | 16.0% |
| Greenbelt, MD | 23,253 | 47 | 6.0% |
| Rolling Meadows, IL | 23,288 | 55 | 10.0% |
| Columbus, NE | 23,291 | 31 | 38.0% |
| Cottage Lake, WA | 23,239 | 45 | 10.0% |
| Auburn, ME | 23,267 | 31 | 38.0% |
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