| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 4°F | 21°F | 12°F | 1.4" |
| February | 6°F | 22°F | 13°F | 1.1" |
| March | 14°F | 32°F | 23°F | 1.6" |
| April | 29°F | 47°F | 37°F | 2.3" |
| May | 41°F | 63°F | 51°F | 3.4" |
| June | 49°F | 70°F | 59°F | 5.6" |
| July | 55°F | 75°F | 65°F | 4.6" |
| August | 54°F | 74°F | 63°F | 4.1" |
| September | 46°F | 67°F | 56°F | 3.7" |
| October | 36°F | 53°F | 44°F | 4.1" |
| November | 25°F | 39°F | 32°F | 2.8" |
| December | 11°F | 25°F | 18°F | 2.4" |
| Index | Madawaska | Maine | National |
| Air quality index | 31 | 33 | 42 |
| Pollution index | 3,228,440 | 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 | 0.020% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Fort Kent, ME | 2,223 | 31 | 38.0% |
| Madawaska, ME | 2,743 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Saylorville, IA | 2,743 | 39 | 22.0% |
| Mangum, OK | 2,743 | 43 | 14.0% |
| Dégelis, QC | 2,743 | n/a | |
| Luverne, AL | 2,742 | 52 | 4.0% |
| Taylor, AL | 2,742 | 35 | 30.0% |
| Madawaska, ME | 2,743 | 31 | 38.0% |
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