| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -21°F | -1°F | -11°F | 0.9" |
| February | -14°F | 9°F | -3°F | 1.0" |
| March | -12°F | 16°F | 2°F | 0.5" |
| April | 11°F | 37°F | 25°F | 0.6" |
| May | 33°F | 59°F | 47°F | 0.6" |
| June | 45°F | 71°F | 59°F | 1.6" |
| July | 48°F | 72°F | 60°F | 2.7" |
| August | 42°F | 65°F | 53°F | 2.7" |
| September | 33°F | 53°F | 42°F | 2.3" |
| October | 15°F | 31°F | 23°F | 1.3" |
| November | -9°F | 9°F | 0°F | 1.1" |
| December | -15°F | 4°F | -5°F | 1.3" |
| Index | Alatna | Alaska | National |
| Air quality index | 38 | 30 | 42 |
| Pollution index | 269,884,000 | 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 | 6.330% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Allakaket, AK | 209 | 38 | 24.0% |
| Alatna, AK | 30 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Skwentna, AK | 30 | 31 | 38.0% |
| Fourche, AR | 30 | 45 | 10.0% |
| Hidden Lake, CO | 30 | 47 | 6.0% |
| Gibson, IA | 30 | 35 | 30.0% |
| Miller, IA | 30 | 15 | 70.0% |
| Alatna, AK | 30 | 38 | 24.0% |
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