| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 3°F | 24°F | 14°F | 2.4" |
| February | 5°F | 26°F | 16°F | 1.7" |
| March | 14°F | 35°F | 25°F | 3.0" |
| April | 29°F | 50°F | 39°F | 3.8" |
| May | 42°F | 64°F | 52°F | 4.4" |
| June | 51°F | 72°F | 61°F | 5.9" |
| July | 56°F | 78°F | 67°F | 6.3" |
| August | 54°F | 76°F | 64°F | 5.4" |
| September | 46°F | 69°F | 57°F | 4.9" |
| October | 36°F | 55°F | 45°F | 6.8" |
| November | 26°F | 42°F | 34°F | 4.4" |
| December | 12°F | 29°F | 20°F | 6.0" |
| Index | Ashland | 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. |
| Mapleton, ME | 715 | 31 | 38.0% |
| Washburn, ME | 1,030 | 31 | 38.0% |
| Ashland, ME | 574 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Moose Creek, AK | 574 | 38 | 24.0% |
| Gurley, AL | 574 | 44 | 12.0% |
| Tiger, GA | 574 | 41 | 18.0% |
| Edgewood, IA | 574 | 29 | 42.0% |
| Danforth, IL | 574 | 42 | 16.0% |
| Ashland, ME | 574 | 31 | 38.0% |
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