| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 43°F | 30°F | 0.8" |
| February | 21°F | 46°F | 33°F | 1.6" |
| March | 34°F | 60°F | 46°F | 2.8" |
| April | 44°F | 69°F | 56°F | 4.4" |
| May | 53°F | 77°F | 65°F | 5.4" |
| June | 64°F | 87°F | 75°F | 5.6" |
| July | 68°F | 90°F | 79°F | 4.9" |
| August | 66°F | 89°F | 77°F | 5.7" |
| September | 57°F | 82°F | 69°F | 4.8" |
| October | 45°F | 71°F | 57°F | 3.9" |
| November | 34°F | 59°F | 46°F | 2.0" |
| December | 22°F | 44°F | 32°F | 1.8" |
| Index | Easton | Kansas | National |
| Air quality index | 43 | 47 | 42 |
| Pollution index | 553,875 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 283 |
| Days with moderate air quality | 82 |
| 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 | 0.001% |
| Lead | 0.510% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Oskaloosa, KS | 1,268 | 41 | 18.0% |
| Nortonville, KS | 728 | 41 | 18.0% |
| Winchester, KS | 563 | 41 | 18.0% |
| McLouth, KS | 1,148 | 41 | 18.0% |
| Effingham, KS | 467 | 43 | 14.0% |
| Easton, KS | 254 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Sanford, AL | 254 | 35 | 30.0% |
| Vernon, CA | 254 | 72 | 44.0% |
| Grover, CO | 254 | 43 | 14.0% |
| Girard, GA | 254 | 47 | 6.0% |
| Montour, IA | 254 | 39 | 22.0% |
| Easton, KS | 254 | 43 | 14.0% |