| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 39°F | 27°F | 0.6" |
| February | 20°F | 43°F | 30°F | 0.9" |
| March | 33°F | 58°F | 44°F | 2.0" |
| April | 43°F | 68°F | 54°F | 4.3" |
| May | 53°F | 77°F | 64°F | 4.6" |
| June | 64°F | 86°F | 75°F | 6.0" |
| July | 67°F | 89°F | 78°F | 4.0" |
| August | 64°F | 87°F | 75°F | 4.7" |
| September | 56°F | 81°F | 67°F | 3.5" |
| October | 44°F | 69°F | 55°F | 3.1" |
| November | 32°F | 56°F | 43°F | 1.5" |
| December | 21°F | 40°F | 30°F | 1.9" |
| Index | Vermillion | Kansas | National |
| Air quality index | 32 | 47 | 42 |
| Pollution index | 308,193 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 95 |
| Days with good air quality | 94 |
| Days with moderate air quality | 1 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Corning, KS | 150 | 32 | 36.0% |
| Beattie, KS | 228 | 32 | 36.0% |
| Wheaton, KS | 94 | 32 | 36.0% |
| Frankfort, KS | 729 | 32 | 36.0% |
| Home, KS | 171 | 32 | 36.0% |
| Vermillion, KS | 77 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Bon Air, AL | 77 | 38 | 24.0% |
| Ward, CO | 77 | 47 | 6.0% |
| Altoona, FL | 77 | 37 | 26.0% |
| Lone Oak, GA | 77 | 42 | 16.0% |
| Sharon, GA | 77 | 44 | 12.0% |
| Vermillion, KS | 77 | 32 | 36.0% |
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