| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 33°F | 28°F | 2.5" |
| February | 24°F | 35°F | 29°F | 1.6" |
| March | 27°F | 39°F | 33°F | 1.5" |
| April | 35°F | 50°F | 42°F | 1.4" |
| May | 42°F | 60°F | 50°F | 1.2" |
| June | 49°F | 64°F | 55°F | 1.2" |
| July | 51°F | 64°F | 57°F | 1.9" |
| August | 51°F | 64°F | 57°F | 2.4" |
| September | 46°F | 58°F | 51°F | 4.3" |
| October | 39°F | 49°F | 44°F | 3.5" |
| November | 28°F | 37°F | 32°F | 2.8" |
| December | 24°F | 33°F | 28°F | 2.3" |
| Index | Skagway | Alaska | National |
| Air quality index | 20 | 30 | 42 |
| Pollution index | 120,573 | 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 | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Haines, AK | 1,905 | 20 | 60.0% |
| Lutak, AK | 190 | 20 | 60.0% |
| Skagway, AK | 1,191 | 20 | 60.0% |
| City | Population | Air Quality Index | National Avg. |
| Felton, DE | 1,191 | 42 | 16.0% |
| Haven, KS | 1,191 | 40 | 20.0% |
| Goodhue, MN | 1,191 | 37 | 26.0% |
| Geronimo, OK | 1,191 | 43 | 14.0% |
| L'Anse-Saint-Jean, QC | 1,191 | n/a | |
| Skagway, AK | 1,191 | 20 | 60.0% |
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