| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 33°F | 27°F | 8.4" |
| February | 22°F | 33°F | 27°F | 4.8" |
| March | 22°F | 35°F | 28°F | 7.0" |
| April | 33°F | 48°F | 40°F | 8.5" |
| May | 39°F | 55°F | 47°F | 2.9" |
| June | 45°F | 60°F | 52°F | 3.1" |
| July | 50°F | 64°F | 56°F | 3.3" |
| August | 50°F | 65°F | 56°F | 3.8" |
| September | 45°F | 59°F | 51°F | 7.5" |
| October | 34°F | 46°F | 40°F | 7.0" |
| November | 27°F | 36°F | 31°F | 16.9" |
| December | 26°F | 35°F | 31°F | 7.3" |
| Index | Seward | 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. |
| Bear Creek, AK | 1,287 | 31 | 38.0% |
| Lowell Point, AK | 91 | 31 | 38.0% |
| Seward, AK | 2,812 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Flemingsburg, KY | 2,811 | 42 | 16.0% |
| The Plains, OH | 2,813 | 25 | 50.0% |
| Oconto Falls, WI | 2,813 | 36 | 28.0% |
| Milton, WV | 2,813 | 42 | 16.0% |
| Moline Acres, MO | 2,810 | 54 | 8.0% |
| Seward, AK | 2,812 | 31 | 38.0% |
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