| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 43°F | 30°F | 0.3" |
| February | 22°F | 48°F | 33°F | 0.6" |
| March | 33°F | 61°F | 45°F | 1.1" |
| April | 42°F | 69°F | 54°F | 2.7" |
| May | 52°F | 78°F | 64°F | 3.9" |
| June | 64°F | 91°F | 76°F | 3.2" |
| July | 68°F | 95°F | 80°F | 3.2" |
| August | 65°F | 91°F | 77°F | 4.3" |
| September | 57°F | 84°F | 69°F | 2.7" |
| October | 44°F | 71°F | 56°F | 1.7" |
| November | 32°F | 59°F | 43°F | 0.7" |
| December | 20°F | 43°F | 30°F | 0.9" |
| Index | Alton | Kansas | National |
| Air quality index | 19 | 47 | 42 |
| Pollution index | 465,174 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 60 |
| Days with good air quality | 55 |
| Days with moderate air quality | 5 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Osborne, KS | 1,572 | 19 | 62.0% |
| Cedar, KS | 18 | 19 | 62.0% |
| Woodston, KS | 138 | 19 | 62.0% |
| Gaylord, KS | 181 | 19 | 62.0% |
| Portis, KS | 162 | 19 | 62.0% |
| Alton, KS | 107 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Fargo, AR | 107 | 45 | 10.0% |
| Moffat, CO | 107 | 16 | 68.0% |
| Manassas, GA | 107 | 39 | 22.0% |
| Matthews, GA | 107 | 47 | 6.0% |
| Buckeye, IA | 107 | 37 | 26.0% |
| Alton, KS | 107 | 19 | 62.0% |
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