| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -13°F | 7°F | -4°F | 7.9" |
| February | -6°F | 17°F | 4°F | 6.8" |
| March | -4°F | 24°F | 9°F | 7.0" |
| April | 20°F | 48°F | 33°F | 6.4" |
| May | 36°F | 65°F | 51°F | 5.5" |
| June | 46°F | 72°F | 60°F | 5.1" |
| July | 50°F | 74°F | 62°F | 6.0" |
| August | 46°F | 70°F | 57°F | 8.5" |
| September | 36°F | 61°F | 46°F | 10.5" |
| October | 21°F | 40°F | 28°F | 12.1" |
| November | -4°F | 15°F | 5°F | 9.8" |
| December | -9°F | 11°F | 0°F | 8.7" |
| Index | Nenana | 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. |
| Four Mile Road, AK | 4 | 38 | 24.0% |
| Anderson, AK | 212 | 38 | 24.0% |
| Nenana, AK | 482 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Altha, FL | 482 | 38 | 24.0% |
| Carlton, GA | 482 | 44 | 12.0% |
| Clermont, IA | 482 | 39 | 22.0% |
| Ellsworth, IA | 482 | 37 | 26.0% |
| Parkton, NC | 482 | 41 | 18.0% |
| Nenana, AK | 482 | 38 | 24.0% |
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