| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 28°F | 19°F | 3.3" |
| February | 15°F | 34°F | 24°F | 1.6" |
| March | 22°F | 44°F | 33°F | 2.3" |
| April | 31°F | 55°F | 44°F | 3.6" |
| May | 38°F | 65°F | 54°F | 4.4" |
| June | 44°F | 75°F | 63°F | 3.2" |
| July | 52°F | 90°F | 75°F | 2.6" |
| August | 50°F | 83°F | 69°F | 2.6" |
| September | 39°F | 73°F | 58°F | 2.8" |
| October | 32°F | 59°F | 45°F | 3.6" |
| November | 23°F | 46°F | 34°F | 1.2" |
| December | 15°F | 30°F | 22°F | 1.7" |
| Index | Arimo | Idaho | National |
| Air quality index | 27 | 32 | 42 |
| Pollution index | 881,525 | 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 | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Bancroft, ID | 309 | 27 | 46.0% |
| Downey, ID | 870 | 27 | 46.0% |
| Lava Hot Springs, ID | 253 | 27 | 46.0% |
| McCammon, ID | 794 | 27 | 46.0% |
| Arimo, ID | 326 | 27 | 46.0% |
| City | Population | Air Quality Index | National Avg. |
| Anchor Bay, CA | 326 | 33 | 34.0% |
| Low Moor, IA | 326 | 42 | 16.0% |
| London Mills, IL | 326 | 41 | 18.0% |
| Crane, IN | 326 | 1 | 98.0% |
| Nashua, MT | 326 | 34 | 32.0% |
| Arimo, ID | 326 | 27 | 46.0% |
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