| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 42°F | 32°F | 2.7" |
| February | 24°F | 44°F | 34°F | 2.6" |
| March | 34°F | 57°F | 44°F | 4.1" |
| April | 43°F | 69°F | 56°F | 4.9" |
| May | 52°F | 77°F | 64°F | 3.9" |
| June | 61°F | 85°F | 73°F | 4.5" |
| July | 65°F | 87°F | 75°F | 4.7" |
| August | 63°F | 87°F | 75°F | 2.7" |
| September | 56°F | 81°F | 67°F | 3.3" |
| October | 45°F | 69°F | 56°F | 3.6" |
| November | 33°F | 57°F | 44°F | 2.9" |
| December | 28°F | 46°F | 36°F | 3.7" |
| Index | Georgetown | Ohio | National |
| Air quality index | 54 | 40 | 42 |
| Pollution index | 746,363 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 139 |
| Days with moderate air quality | 206 |
| Days w/ poor A.Q. for sensitive groups | 20 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.060% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Aberdeen, OH | 1,484 | 14 | 72.0% |
| Sardinia, OH | 1,333 | 43 | 14.0% |
| Mount Orab, OH | 4,403 | 43 | 14.0% |
| Russellville, OH | 716 | 43 | 14.0% |
| Winchester, OH | 1,159 | 43 | 14.0% |
| Georgetown, OH | 4,414 | 54 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| St. James, MN | 4,414 | 32 | 36.0% |
| West Jefferson, OH | 4,413 | 46 | 8.0% |
| Northfield, VT | 4,413 | 37 | 26.0% |
| Wainwright No. 61, AB | 4,413 | n/a | |
| Ashdown, AR | 4,415 | 39 | 22.0% |
| Georgetown, OH | 4,414 | 54 | 8.0% |
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