| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 0°F | 15°F | 7°F | 0.9" |
| February | 4°F | 21°F | 12°F | 0.8" |
| March | 2°F | 21°F | 11°F | 0.6" |
| April | 18°F | 37°F | 27°F | 0.7" |
| May | 33°F | 54°F | 43°F | 1.0" |
| June | 43°F | 64°F | 53°F | 1.6" |
| July | 48°F | 65°F | 55°F | 2.7" |
| August | 47°F | 62°F | 54°F | 3.3" |
| September | 39°F | 55°F | 46°F | 3.4" |
| October | 27°F | 40°F | 33°F | 2.5" |
| November | 10°F | 24°F | 17°F | 1.6" |
| December | 6°F | 21°F | 13°F | 1.4" |
| Index | Bethel | Alaska | National |
| Air quality index | 31 | 30 | 42 |
| Pollution index | 1,330,810 | 11,243,194 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 262 |
| Days with moderate air quality | 92 |
| Days w/ poor A.Q. for sensitive groups | 7 |
| Days with unhealthy air quality | 4 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Kwethluk, AK | 459 | 31 | 38.0% |
| Napaskiak, AK | 537 | 31 | 38.0% |
| Napakiak, AK | 593 | 31 | 38.0% |
| Oscarville, AK | 95 | 31 | 38.0% |
| Akiachak, AK | 461 | 31 | 38.0% |
| Bethel, AK | 6,548 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Tuckahoe, NY | 6,548 | 51 | 2.0% |
| West View, PA | 6,547 | 56 | 12.0% |
| Medina, MN | 6,549 | 46 | 8.0% |
| Oneonta, AL | 6,550 | 43 | 14.0% |
| Plessisville, QC | 6,545 | n/a | |
| Bethel, AK | 6,548 | 31 | 38.0% |
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