| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 35°F | 30°F | 7.2" |
| February | 24°F | 37°F | 30°F | 3.9" |
| March | 25°F | 40°F | 33°F | 3.4" |
| April | 32°F | 50°F | 41°F | 3.7" |
| May | 40°F | 60°F | 50°F | 3.4" |
| June | 46°F | 64°F | 54°F | 4.0" |
| July | 49°F | 65°F | 56°F | 5.8" |
| August | 49°F | 64°F | 56°F | 6.9" |
| September | 44°F | 57°F | 50°F | 9.9" |
| October | 36°F | 49°F | 42°F | 8.5" |
| November | 27°F | 38°F | 33°F | 6.8" |
| December | 23°F | 35°F | 29°F | 5.6" |
| Index | Juneau | Alaska | National |
| Air quality index | 20 | 30 | 42 |
| Pollution index | 926,820 | 11,243,194 | 2,726,193 |
| Measurement | Total |
| Days measured | 362 |
| Days with good air quality | 308 |
| Days with moderate air quality | 51 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.070% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.030% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Juneau, AK | 32,099 | 20 | 60.0% |
| City | Population | Air Quality Index | National Avg. |
| Weatherford, TX | 32,110 | 33 | 34.0% |
| Statesboro, GA | 32,115 | 39 | 22.0% |
| Dania Beach, FL | 32,125 | 41 | 18.0% |
| Goleta, CA | 32,142 | 44 | 12.0% |
| Westlake, OH | 32,154 | 50 | = 100 |
| Juneau, AK | 32,099 | 20 | 60.0% |
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