| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 8°F | 25°F | 17°F | 1.0" |
| February | 13°F | 30°F | 21°F | 0.5" |
| March | 13°F | 34°F | 24°F | 0.4" |
| April | 27°F | 46°F | 37°F | 0.6" |
| May | 36°F | 57°F | 47°F | 0.8" |
| June | 44°F | 62°F | 53°F | 1.5" |
| July | 48°F | 65°F | 56°F | 2.1" |
| August | 47°F | 64°F | 55°F | 2.9" |
| September | 41°F | 58°F | 49°F | 4.3" |
| October | 30°F | 46°F | 38°F | 2.5" |
| November | 14°F | 31°F | 23°F | 0.9" |
| December | 12°F | 27°F | 20°F | 0.8" |
| Index | Kenai | 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. |
| Ridgeway, AK | 2,631 | 31 | 38.0% |
| Nikiski, AK | 4,324 | 31 | 38.0% |
| Cohoe, AK | 1,469 | 31 | 38.0% |
| Salamatof, AK | 1,025 | 31 | 38.0% |
| Funny River, AK | 1,340 | 31 | 38.0% |
| Kenai, AK | 7,799 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Ripon, WI | 7,802 | 36 | 28.0% |
| Fort Belvoir, VA | 7,794 | 47 | 6.0% |
| St. Francis, MN | 7,793 | 46 | 8.0% |
| Houghton, MI | 7,805 | 8 | 84.0% |
| Puslinch, ON | 7,805 | n/a | |
| Kenai, AK | 7,799 | 31 | 38.0% |
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