| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 48°F | 34°F | 0.6" |
| February | 26°F | 51°F | 37°F | 0.7" |
| March | 39°F | 63°F | 50°F | 1.9" |
| April | 48°F | 72°F | 59°F | 4.3" |
| May | 57°F | 78°F | 67°F | 5.6" |
| June | 67°F | 88°F | 77°F | 5.7" |
| July | 70°F | 92°F | 81°F | 4.3" |
| August | 68°F | 92°F | 79°F | 3.7" |
| September | 60°F | 84°F | 70°F | 3.5" |
| October | 48°F | 73°F | 59°F | 3.5" |
| November | 37°F | 61°F | 48°F | 1.9" |
| December | 27°F | 48°F | 36°F | 1.2" |
| Index | Longton | 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 | 292 |
| Days with moderate air quality | 72 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| 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. |
| New Albany, KS | 59 | 22 | 56.0% |
| Fredonia, KS | 2,077 | 22 | 56.0% |
| Elk City, KS | 268 | 38 | 24.0% |
| Elk Falls, KS | 104 | 40 | 20.0% |
| Howard, KS | 668 | 40 | 20.0% |
| Longton, KS | 386 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Newington, GA | 386 | 39 | 22.0% |
| Addieville, IL | 386 | 43 | 14.0% |
| Carbon Hill, IL | 386 | 0 | 100.0% |
| Clear Lake, IL | 386 | 40 | 20.0% |
| Hartsburg, IL | 386 | 44 | 12.0% |
| Longton, KS | 386 | 40 | 20.0% |
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