| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -24°F | -8°F | -16°F | 0.2" |
| February | -18°F | 2°F | -9°F | 0.1" |
| March | -11°F | 14°F | 2°F | 0.0" |
| April | 14°F | 38°F | 27°F | 0.0" |
| May | 36°F | 61°F | 50°F | 0.9" |
| June | 49°F | 72°F | 62°F | 0.5" |
| July | 52°F | 73°F | 63°F | 2.4" |
| August | 45°F | 66°F | 56°F | 2.7" |
| September | 34°F | 53°F | 43°F | 1.1" |
| October | 15°F | 29°F | 22°F | 0.6" |
| November | -12°F | 4°F | -4°F | 0.8" |
| December | -20°F | -4°F | -12°F | 0.5" |
| Index | Chalkyitsik | Alaska | National |
| Air quality index | 38 | 30 | 42 |
| Pollution index | 4,370,560 | 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 | 0.010% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.090% |
| Mercury | 0.060% |
| City | Population | Air Quality Index | National Avg. |
| Chalkyitsik, AK | 118 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Delta, AL | 118 | 38 | 24.0% |
| Reed, AR | 118 | 43 | 14.0% |
| Katherine, AZ | 118 | 13 | 74.0% |
| Montgomery Creek, CA | 118 | 42 | 16.0% |
| Fernan Lake Village, ID | 118 | 43 | 14.0% |
| Chalkyitsik, AK | 118 | 38 | 24.0% |
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