| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -14°F | 4°F | -6°F | 0.7" |
| February | -8°F | 14°F | 3°F | 1.1" |
| March | -7°F | 19°F | 6°F | 1.1" |
| April | 15°F | 38°F | 27°F | 1.6" |
| May | 33°F | 58°F | 46°F | 0.7" |
| June | 44°F | 68°F | 56°F | 1.4" |
| July | 48°F | 69°F | 59°F | 2.4" |
| August | 44°F | 64°F | 54°F | 3.5" |
| September | 36°F | 55°F | 45°F | 2.9" |
| October | 22°F | 36°F | 29°F | 2.3" |
| November | -1°F | 16°F | 8°F | 0.8" |
| December | -8°F | 8°F | 1°F | 0.6" |
| Index | Kaltag | 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. |
| Kaltag, AK | 209 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Allakaket, AK | 209 | 38 | 24.0% |
| Adin, CA | 209 | 29 | 42.0% |
| Valley Home, CA | 209 | 49 | 2.0% |
| Oakville, IA | 209 | 32 | 36.0% |
| Thor, IA | 209 | 37 | 26.0% |
| Kaltag, AK | 209 | 38 | 24.0% |
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