| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -1°F | 11°F | 5°F | 0.2" |
| February | 3°F | 17°F | 10°F | 0.2" |
| March | 1°F | 17°F | 9°F | 0.0" |
| April | 17°F | 33°F | 24°F | 0.9" |
| May | 32°F | 46°F | 39°F | 1.7" |
| June | 44°F | 57°F | 50°F | 1.5" |
| July | 50°F | 62°F | 56°F | 4.8" |
| August | 47°F | 60°F | 54°F | 3.4" |
| September | 39°F | 52°F | 45°F | 2.9" |
| October | 26°F | 37°F | 31°F | 2.1" |
| November | 6°F | 19°F | 12°F | 1.1" |
| December | 5°F | 17°F | 11°F | 0.6" |
| Index | Unalakleet | Alaska | National |
| Air quality index | 38 | 30 | 42 |
| Pollution index | 481,700 | 11,243,194 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 230 |
| Days with moderate air quality | 96 |
| Days w/ poor A.Q. for sensitive groups | 18 |
| Days with unhealthy air quality | 16 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Unalakleet, AK | 787 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Mound City, KS | 787 | 47 | 6.0% |
| Hornbeck, LA | 787 | 30 | 40.0% |
| Isola, MS | 787 | 43 | 14.0% |
| Bettsville, OH | 787 | 40 | 20.0% |
| Beersheba Springs, TN | 787 | 46 | 8.0% |
| Unalakleet, AK | 787 | 38 | 24.0% |