| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 35°F | 24°F | 1.1" |
| February | 20°F | 41°F | 30°F | 1.0" |
| March | 27°F | 53°F | 39°F | 1.3" |
| April | 31°F | 61°F | 46°F | 1.3" |
| May | 37°F | 71°F | 54°F | 1.4" |
| June | 45°F | 82°F | 64°F | 1.0" |
| July | 52°F | 92°F | 73°F | 0.5" |
| August | 49°F | 90°F | 70°F | 0.6" |
| September | 42°F | 80°F | 60°F | 1.1" |
| October | 33°F | 65°F | 48°F | 1.4" |
| November | 24°F | 50°F | 36°F | 1.1" |
| December | 16°F | 36°F | 25°F | 1.6" |
| Index | Aberdeen | Idaho | National |
| Air quality index | 27 | 32 | 42 |
| Pollution index | 2,182,500 | 2,063,710 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 344 |
| Days with moderate air quality | 21 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| American Falls, ID | 4,295 | 27 | 46.0% |
| Arbon Valley, ID | 882 | 27 | 46.0% |
| Aberdeen, ID | 2,449 | 27 | 46.0% |
| City | Population | Air Quality Index | National Avg. |
| Bono, AR | 2,449 | 45 | 10.0% |
| Carleton, MI | 2,449 | 1 | 98.0% |
| Sour Lake, TX | 2,449 | 45 | 10.0% |
| York, AL | 2,448 | 36 | 28.0% |
| Greenville, DE | 2,448 | 51 | 2.0% |
| Aberdeen, ID | 2,449 | 27 | 46.0% |
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