| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 43°F | 30°F | 0.6" |
| February | 23°F | 47°F | 34°F | 1.2" |
| March | 35°F | 60°F | 46°F | 2.5" |
| April | 45°F | 70°F | 56°F | 4.4" |
| May | 54°F | 77°F | 65°F | 5.6" |
| June | 65°F | 88°F | 76°F | 5.2" |
| July | 69°F | 92°F | 79°F | 4.2" |
| August | 67°F | 90°F | 77°F | 4.9" |
| September | 58°F | 82°F | 69°F | 4.1" |
| October | 46°F | 71°F | 57°F | 3.8" |
| November | 34°F | 58°F | 45°F | 1.5" |
| December | 23°F | 44°F | 33°F | 1.6" |
| Index | Osage City | Kansas | National |
| Air quality index | 22 | 47 | 42 |
| Pollution index | 1,288,380 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 60 |
| Days with good air quality | 55 |
| Days with moderate air quality | 4 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.005% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Melvern, KS | 381 | 22 | 56.0% |
| Olivet, KS | 63 | 22 | 56.0% |
| Admire, KS | 173 | 22 | 56.0% |
| Reading, KS | 171 | 22 | 56.0% |
| Burlingame, KS | 863 | 41 | 18.0% |
| Osage City, KS | 2,867 | 22 | 56.0% |
| City | Population | Air Quality Index | National Avg. |
| Lakeside Park, KY | 2,867 | 54 | 8.0% |
| Valentine, NE | 2,867 | 19 | 62.0% |
| Lena, IL | 2,866 | 42 | 16.0% |
| Northeast Ithaca, NY | 2,866 | 34 | 32.0% |
| Coalhurst, AB | 2,866 | n/a | |
| Osage City, KS | 2,867 | 22 | 56.0% |