| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -13°F | 3°F | -5°F | 0.3" |
| February | -4°F | 15°F | 5°F | 0.1" |
| March | -3°F | 22°F | 10°F | 0.2" |
| April | 21°F | 43°F | 32°F | 0.9" |
| May | 35°F | 60°F | 48°F | 1.2" |
| June | 46°F | 67°F | 56°F | 2.5" |
| July | 49°F | 69°F | 59°F | 2.7" |
| August | 45°F | 65°F | 54°F | 3.2" |
| September | 36°F | 54°F | 45°F | 2.4" |
| October | 20°F | 34°F | 27°F | 1.0" |
| November | -3°F | 13°F | 4°F | 0.3" |
| December | -10°F | 6°F | -2°F | 0.3" |
| Index | Nikolai | Alaska | National |
| Air quality index | 31 | 30 | 42 |
| Pollution index | 131,850 | 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 | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.040% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Nikolai, AK | 115 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Onycha, AL | 115 | 35 | 30.0% |
| Staves, AR | 115 | 32 | 36.0% |
| Wet Camp Village, AZ | 115 | 74 | 48.0% |
| Mettler, CA | 115 | 67 | 34.0% |
| Snelling, CA | 115 | 48 | 4.0% |
| Nikolai, AK | 115 | 31 | 38.0% |
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