| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 36°F | 27°F | 2.6" |
| February | 20°F | 39°F | 29°F | 2.0" |
| March | 32°F | 53°F | 42°F | 2.7" |
| April | 42°F | 66°F | 53°F | 4.3" |
| May | 51°F | 75°F | 63°F | 4.4" |
| June | 61°F | 84°F | 72°F | 5.8" |
| July | 64°F | 85°F | 74°F | 4.8" |
| August | 62°F | 85°F | 73°F | 3.6" |
| September | 55°F | 79°F | 66°F | 3.2" |
| October | 44°F | 67°F | 55°F | 3.3" |
| November | 33°F | 53°F | 43°F | 3.1" |
| December | 24°F | 40°F | 31°F | 3.1" |
| Index | Newtown | Indiana | National |
| Air quality index | 42 | 56 | 42 |
| Pollution index | 9,793,540 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 276 |
| Days with moderate air quality | 89 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.001% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| Wallace, IN | 101 | 42 | 16.0% |
| Crawfordsville, IN | 16,088 | 42 | 16.0% |
| West Point, IN | 98 | 42 | 16.0% |
| Attica, IN | 3,256 | 42 | 16.0% |
| Covington, IN | 2,572 | 42 | 16.0% |
| Newtown, IN | 305 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Iron City, GA | 305 | 35 | 30.0% |
| Deloit, IA | 305 | 35 | 30.0% |
| Center Point, IN | 305 | 45 | 10.0% |
| Staunton, IN | 305 | 45 | 10.0% |
| St. Charles, KY | 305 | 40 | 20.0% |
| Newtown, IN | 305 | 42 | 16.0% |
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