| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -3°F | 7°F | 1°F | 5.8" |
| February | 2°F | 21°F | 10°F | 2.4" |
| March | 9°F | 32°F | 21°F | 1.7" |
| April | 29°F | 44°F | 37°F | 3.3" |
| May | 44°F | 58°F | 52°F | 2.2" |
| June | 51°F | 62°F | 57°F | 3.7" |
| July | 55°F | 65°F | 60°F | 3.9" |
| August | 51°F | 61°F | 56°F | 5.4" |
| September | 42°F | 54°F | 48°F | 4.3" |
| October | 27°F | 39°F | 32°F | 3.1" |
| November | 12°F | 23°F | 17°F | 2.7" |
| December | 3°F | 12°F | 7°F | 3.1" |
| Index | Willow | Alaska | National |
| Air quality index | 31 | 30 | 42 |
| Pollution index | 2,223,820 | 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 | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Houston, AK | 1,991 | 31 | 38.0% |
| Meadow Lakes, AK | 8,504 | 31 | 38.0% |
| Willow, AK | 2,015 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Rector, AR | 2,015 | 26 | 48.0% |
| Homerville, GA | 2,015 | 26 | 48.0% |
| Farmington, IL | 2,015 | 41 | 18.0% |
| Dover Beaches North, NJ | 2,015 | 41 | 18.0% |
| Avoca, AR | 2,014 | 44 | 12.0% |
| Willow, AK | 2,015 | 31 | 38.0% |