| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -21°F | -3°F | -12°F | 0.2" |
| February | -16°F | 7°F | -6°F | 0.1" |
| March | -9°F | 22°F | 6°F | 0.1" |
| April | 17°F | 45°F | 31°F | 0.2" |
| May | 34°F | 61°F | 48°F | 0.8" |
| June | 44°F | 70°F | 57°F | 2.3" |
| July | 48°F | 71°F | 59°F | 3.4" |
| August | 43°F | 67°F | 55°F | 1.8" |
| September | 33°F | 56°F | 43°F | 1.1" |
| October | 16°F | 33°F | 24°F | 0.3" |
| November | -10°F | 7°F | -2°F | 0.3" |
| December | -19°F | -3°F | -11°F | 0.1" |
| Index | Tetlin | Alaska | National |
| Air quality index | 38 | 30 | 42 |
| Pollution index | 9,104,530 | 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 | 0.210% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Tetlin, AK | 232 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Gordonville, AL | 232 | 52 | 4.0% |
| Haivana Nakya, AZ | 232 | 47 | 6.0% |
| Blakesburg, IA | 232 | 39 | 22.0% |
| Fenton, IA | 232 | 15 | 70.0% |
| Cleveland, IL | 232 | 46 | 8.0% |
| Tetlin, AK | 232 | 38 | 24.0% |
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