| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 22°F | 15°F | 1.4" |
| February | 15°F | 28°F | 21°F | 1.2" |
| March | 12°F | 28°F | 20°F | 2.1" |
| April | 26°F | 40°F | 33°F | 1.7" |
| May | 37°F | 53°F | 44°F | 4.6" |
| June | 44°F | 61°F | 52°F | 3.5" |
| July | 49°F | 63°F | 55°F | 3.6" |
| August | 48°F | 62°F | 55°F | 3.0" |
| September | 42°F | 55°F | 48°F | 3.8" |
| October | 32°F | 43°F | 37°F | 3.3" |
| November | 17°F | 31°F | 23°F | 2.8" |
| December | 14°F | 26°F | 20°F | 2.2" |
| Index | Portage Creek | Alaska | National |
| Air quality index | 31 | 30 | 42 |
| Pollution index | 145,162 | 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 | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Portage Creek, AK | 3 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Gilbert, AR | 3 | 36 | 28.0% |
| Poso Park, CA | 3 | 67 | 34.0% |
| Bonanza, CO | 3 | 16 | 68.0% |
| Brandon, CO | 3 | 20 | 60.0% |
| The Ranch, MN | 3 | 33 | 34.0% |
| Portage Creek, AK | 3 | 31 | 38.0% |
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