| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 43°F | 35°F | 10.6" |
| February | 22°F | 41°F | 31°F | 3.8" |
| March | 35°F | 58°F | 46°F | 4.4" |
| April | 42°F | 67°F | 54°F | 6.5" |
| May | 51°F | 78°F | 65°F | 6.1" |
| June | 63°F | 85°F | 74°F | 8.8" |
| July | 63°F | 86°F | 74°F | 4.6" |
| August | 67°F | 90°F | 78°F | 3.7" |
| September | 57°F | 83°F | 69°F | 7.3" |
| October | 48°F | 70°F | 58°F | 4.4" |
| November | 34°F | 57°F | 45°F | 7.0" |
| December | 25°F | 41°F | 33°F | 5.1" |
| Index | Freetown | Indiana | National |
| Air quality index | 35 | 56 | 42 |
| Pollution index | 751,900 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 360 |
| Days with good air quality | 340 |
| Days with moderate air quality | 20 |
| 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 | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Vallonia, IN | 292 | 35 | 30.0% |
| Jonesville, IN | 223 | 35 | 30.0% |
| Brownstown, IN | 2,920 | 35 | 30.0% |
| Seymour, IN | 19,780 | 35 | 30.0% |
| Medora, IN | 1,066 | 35 | 30.0% |
| Freetown, IN | 317 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Gillsville, GA | 317 | 37 | 26.0% |
| Maunaloa, HI | 317 | 30 | 40.0% |
| Granville, IA | 317 | 35 | 30.0% |
| Mystic, IA | 317 | 39 | 22.0% |
| Ute, IA | 317 | 35 | 30.0% |
| Freetown, IN | 317 | 35 | 30.0% |
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