| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 28°F | 19°F | 1.2" |
| February | 15°F | 34°F | 24°F | 0.7" |
| March | 25°F | 47°F | 35°F | 1.1" |
| April | 31°F | 58°F | 43°F | 1.6" |
| May | 38°F | 68°F | 52°F | 1.6" |
| June | 46°F | 78°F | 61°F | 1.3" |
| July | 51°F | 88°F | 69°F | 0.5" |
| August | 49°F | 86°F | 67°F | 0.8" |
| September | 42°F | 76°F | 57°F | 1.2" |
| October | 33°F | 59°F | 45°F | 1.5" |
| November | 24°F | 44°F | 33°F | 0.9" |
| December | 13°F | 30°F | 21°F | 1.3" |
| Index | Ashton | Idaho | National |
| Air quality index | 43 | 32 | 42 |
| Pollution index | 225,062 | 2,063,710 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 326 |
| Days with moderate air quality | 39 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.004% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Warm River, ID | 0 | 43 | 14.0% |
| Drummond, ID | 1 | 43 | 14.0% |
| Newdale, ID | 421 | 43 | 14.0% |
| Teton, ID | 899 | 43 | 14.0% |
| St. Anthony, ID | 3,552 | 43 | 14.0% |
| Ashton, ID | 1,185 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Banks Springs, LA | 1,185 | 34 | 32.0% |
| Pen Mar, PA | 1,185 | 40 | 20.0% |
| Obion, TN | 1,185 | 26 | 48.0% |
| Lake Medina Shores, TX | 1,185 | 49 | 2.0% |
| Lot 25, PE | 1,185 | n/a | |
| Ashton, ID | 1,185 | 43 | 14.0% |
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