| 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 | Oolitic | Indiana | National |
| Air quality index | 42 | 56 | 42 |
| Pollution index | 809,095 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 291 |
| Days with moderate air quality | 72 |
| 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 | 0.110% |
| Mercury | 0.080% |
| City | Population | Air Quality Index | National Avg. |
| Dover Hill, IN | 16 | 1 | 98.0% |
| Smithville-Sanders, IN | 3,411 | 42 | 16.0% |
| Avoca, IN | 705 | 42 | 16.0% |
| Bedford, IN | 13,246 | 42 | 16.0% |
| Harrodsburg, IN | 592 | 42 | 16.0% |
| Oolitic, IN | 1,443 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Dassel, MN | 1,443 | 32 | 36.0% |
| Taos Pueblo, NM | 1,443 | 15 | 70.0% |
| Burton, OH | 1,443 | 50 | = 100 |
| Booker, TX | 1,443 | 15 | 70.0% |
| Dale, IN | 1,442 | 6 | 88.0% |
| Oolitic, IN | 1,443 | 42 | 16.0% |
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