| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 44°F | 31°F | 0.4" |
| February | 24°F | 47°F | 34°F | 1.5" |
| March | 36°F | 61°F | 46°F | 2.4" |
| April | 45°F | 70°F | 56°F | 4.5" |
| May | 55°F | 77°F | 65°F | 5.2" |
| June | 65°F | 87°F | 75°F | 5.2" |
| July | 68°F | 91°F | 79°F | 4.4" |
| August | 66°F | 90°F | 77°F | 4.8" |
| September | 58°F | 82°F | 69°F | 3.8" |
| October | 46°F | 71°F | 57°F | 3.2" |
| November | 35°F | 59°F | 45°F | 1.4" |
| December | 24°F | 45°F | 33°F | 1.4" |
| Index | Allen | 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. |
| Bushong, KS | 30 | 22 | 56.0% |
| Dunlap, KS | 49 | 22 | 56.0% |
| Admire, KS | 169 | 22 | 56.0% |
| Americus, KS | 917 | 22 | 56.0% |
| Reading, KS | 165 | 22 | 56.0% |
| Allen, KS | 140 | 22 | 56.0% |
| City | Population | Air Quality Index | National Avg. |
| Klagetoh, AZ | 140 | 17 | 66.0% |
| Sorrento, FL | 140 | 37 | 26.0% |
| Mendes, GA | 140 | 39 | 22.0% |
| Bernard, IA | 140 | 29 | 42.0% |
| Brunsville, IA | 140 | 35 | 30.0% |
| Allen, KS | 140 | 22 | 56.0% |
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