| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 39°F | 30°F | 2.9" |
| February | 22°F | 41°F | 31°F | 2.2" |
| March | 31°F | 54°F | 42°F | 3.5" |
| April | 41°F | 67°F | 53°F | 4.1" |
| May | 50°F | 75°F | 62°F | 3.5" |
| June | 59°F | 82°F | 70°F | 5.1" |
| July | 63°F | 85°F | 73°F | 4.0" |
| August | 61°F | 84°F | 72°F | 3.1" |
| September | 54°F | 78°F | 66°F | 2.8" |
| October | 43°F | 66°F | 54°F | 3.5" |
| November | 33°F | 55°F | 43°F | 2.8" |
| December | 27°F | 43°F | 35°F | 3.4" |
| Index | Malta | Ohio | National |
| Air quality index | 25 | 40 | 42 |
| Pollution index | 874,439 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 120 |
| Days with good air quality | 116 |
| Days with moderate air quality | 4 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Glouster, OH | 1,626 | 25 | 50.0% |
| Rose Farm, OH | 83 | 25 | 50.0% |
| East Fultonham, OH | 362 | 25 | 50.0% |
| Corning, OH | 402 | 25 | 50.0% |
| Jacksonville, OH | 349 | 25 | 50.0% |
| Malta, OH | 647 | 25 | 50.0% |
| City | Population | Air Quality Index | National Avg. |
| Noble, IL | 647 | 40 | 20.0% |
| Palmyra, IL | 647 | 40 | 20.0% |
| Burlington, IN | 647 | 42 | 16.0% |
| Leonardville, KS | 647 | 32 | 36.0% |
| McIntosh, MN | 647 | 33 | 34.0% |
| Malta, OH | 647 | 25 | 50.0% |
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