| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 30°F | 21°F | 0.8" |
| February | 18°F | 39°F | 27°F | 1.7" |
| March | 30°F | 57°F | 42°F | 6.2" |
| April | 37°F | 62°F | 49°F | 6.8" |
| May | 50°F | 74°F | 61°F | 10.2" |
| June | 60°F | 82°F | 71°F | 8.0" |
| July | 65°F | 89°F | 77°F | 1.5" |
| August | 64°F | 87°F | 74°F | 8.3" |
| September | 55°F | 82°F | 67°F | 4.1" |
| October | 41°F | 68°F | 53°F | 5.7" |
| November | 27°F | 57°F | 40°F | 3.8" |
| December | 14°F | 36°F | 24°F | 1.2" |
| Index | Ashton | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 19,659 | 590,627 | 2,726,193 |
| Measurement | Total |
| Days measured | 97 |
| Days with good air quality | 92 |
| Days with moderate air quality | 5 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.000% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Farwell, NE | 92 | 19 | 62.0% |
| Rockville, NE | 176 | 19 | 62.0% |
| Hazard, NE | 45 | 19 | 62.0% |
| Elba, NE | 268 | 19 | 62.0% |
| Howard City, NE | 190 | 19 | 62.0% |
| Ashton, NE | 238 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Edwardsville, AL | 238 | 43 | 14.0% |
| Magness, AR | 238 | 45 | 10.0% |
| Dripping Springs, AZ | 238 | 47 | 6.0% |
| Blencoe, IA | 238 | 35 | 30.0% |
| Luana, IA | 238 | 35 | 30.0% |
| Ashton, NE | 238 | 19 | 62.0% |
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