| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 4°F | 22°F | 12°F | 3.3" |
| February | 4°F | 27°F | 14°F | 2.3" |
| March | 8°F | 32°F | 20°F | 0.3" |
| April | 29°F | 49°F | 39°F | 1.0" |
| May | 37°F | 57°F | 48°F | 1.6" |
| June | 43°F | 64°F | 54°F | 7.1" |
| July | 49°F | 66°F | 57°F | 1.0" |
| August | 47°F | 66°F | 56°F | 1.2" |
| September | 42°F | 58°F | 49°F | 4.2" |
| October | 28°F | 44°F | 35°F | 1.5" |
| November | 15°F | 30°F | 22°F | 2.9" |
| December | 13°F | 28°F | 21°F | 1.0" |
| Index | Cohoe | Alaska | National |
| Air quality index | 31 | 30 | 42 |
| Pollution index | 2,169,570 | 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 | 0.002% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Kasilof, AK | 705 | 31 | 38.0% |
| Kenai, AK | 7,799 | 31 | 38.0% |
| Clam Gulch, AK | 251 | 31 | 38.0% |
| Ridgeway, AK | 2,631 | 31 | 38.0% |
| Kalifornsky, AK | 8,395 | 31 | 38.0% |
| Cohoe, AK | 1,469 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Okawville, IL | 1,469 | 43 | 14.0% |
| Holly Hill, SC | 1,469 | 29 | 42.0% |
| Danbury, TX | 1,469 | 52 | 4.0% |
| Clarendon, AR | 1,470 | 45 | 10.0% |
| Brooklet, GA | 1,470 | 39 | 22.0% |
| Cohoe, AK | 1,469 | 31 | 38.0% |
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