| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 41°F | 31°F | 3.4" |
| February | 28°F | 49°F | 37°F | 3.0" |
| March | 40°F | 64°F | 50°F | 8.1" |
| April | 45°F | 67°F | 55°F | 4.4" |
| May | 57°F | 77°F | 67°F | 7.6" |
| June | 65°F | 85°F | 75°F | 15.3" |
| July | 68°F | 91°F | 79°F | 5.4" |
| August | 71°F | 92°F | 80°F | 12.0" |
| September | 62°F | 85°F | 72°F | 1.5" |
| October | 50°F | 73°F | 60°F | 9.9" |
| November | 36°F | 61°F | 47°F | 0.9" |
| December | 23°F | 43°F | 32°F | 3.7" |
| Index | Leon | Kansas | National |
| Air quality index | 40 | 47 | 42 |
| Pollution index | 235,434 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 301 |
| Days with moderate air quality | 64 |
| 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 | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| El Dorado, KS | 12,976 | 40 | 20.0% |
| Latham, KS | 236 | 40 | 20.0% |
| Rosalia, KS | 100 | 40 | 20.0% |
| Douglass, KS | 1,774 | 40 | 20.0% |
| Towanda, KS | 1,579 | 40 | 20.0% |
| Leon, KS | 464 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Scammon Bay, AK | 464 | 31 | 38.0% |
| Dozier, AL | 464 | 52 | 4.0% |
| Allenspark, CO | 464 | 47 | 6.0% |
| Saguache, CO | 464 | 16 | 68.0% |
| Kenton, DE | 464 | 42 | 16.0% |
| Leon, KS | 464 | 40 | 20.0% |
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