| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 34°F | 25°F | 3.1" |
| February | 16°F | 36°F | 25°F | 3.1" |
| March | 29°F | 50°F | 38°F | 4.2" |
| April | 40°F | 65°F | 52°F | 7.0" |
| May | 50°F | 74°F | 62°F | 5.1" |
| June | 60°F | 81°F | 70°F | 5.3" |
| July | 61°F | 81°F | 71°F | 4.8" |
| August | 59°F | 81°F | 69°F | 8.6" |
| September | 52°F | 78°F | 64°F | 5.3" |
| October | 43°F | 67°F | 54°F | 7.0" |
| November | 31°F | 51°F | 40°F | 4.4" |
| December | 26°F | 42°F | 34°F | 4.5" |
| Index | Ridgeway | Ohio | National |
| Air quality index | 39 | 40 | 42 |
| Pollution index | 750,178 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 303 |
| Days with moderate air quality | 61 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| La Rue, OH | 581 | 39 | 22.0% |
| Rushsylvania, OH | 428 | 39 | 22.0% |
| Alger, OH | 875 | 39 | 22.0% |
| Marseilles, OH | 82 | 39 | 22.0% |
| Huntsville, OH | 492 | 39 | 22.0% |
| Ridgeway, OH | 349 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Wiley, CO | 349 | 20 | 60.0% |
| Michiana Shores, IN | 349 | 37 | 26.0% |
| Rice Lake CDP, MN | 349 | 33 | 34.0% |
| Jacksonville, OH | 349 | 25 | 50.0% |
| Magnetic Springs, OH | 349 | 46 | 8.0% |
| Ridgeway, OH | 349 | 39 | 22.0% |
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