| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 24°F | 16°F | 0.5" |
| February | 12°F | 29°F | 21°F | 0.5" |
| March | 15°F | 35°F | 25°F | 0.6" |
| April | 30°F | 48°F | 39°F | 0.4" |
| May | 41°F | 60°F | 50°F | 0.5" |
| June | 49°F | 66°F | 57°F | 1.1" |
| July | 54°F | 69°F | 60°F | 1.9" |
| August | 51°F | 66°F | 58°F | 2.9" |
| September | 43°F | 58°F | 50°F | 3.5" |
| October | 31°F | 45°F | 37°F | 1.5" |
| November | 14°F | 29°F | 22°F | 0.6" |
| December | 11°F | 26°F | 19°F | 0.8" |
| Index | Girdwood | Anchorage | Alaska |
| Air quality index | 31 | 31 | 30 |
| Pollution index | 7,145,440 | 7,145,440 | 11,243,194 |
| 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 | 0.030% |
| Benzene | 0.130% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.140% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Sunrise, AK | 39 | 31 | 38.0% |
| Whittier, AK | 255 | 31 | 38.0% |
| Anchorage, AK | 292,090 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Gatineau, QC | 293,695 | n/a | |
| Greensboro, NC | 294,395 | 43 | 14.0% |
| Plano, TX | 288,870 | 51 | 2.0% |
| Lincoln, NE | 286,388 | 31 | 38.0% |
| Orlando, FL | 284,817 | 39 | 22.0% |
| Anchorage, AK | 292,090 | 31 | 38.0% |
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