| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 41°F | 33°F | 8.9" |
| February | 20°F | 38°F | 29°F | 4.8" |
| March | 34°F | 56°F | 44°F | 3.7" |
| April | 41°F | 66°F | 53°F | 7.5" |
| May | 52°F | 77°F | 65°F | 5.1" |
| June | 62°F | 86°F | 74°F | 8.7" |
| July | 63°F | 86°F | 74°F | 9.6" |
| August | 66°F | 88°F | 76°F | 6.0" |
| September | 57°F | 83°F | 69°F | 12.3" |
| October | 48°F | 70°F | 58°F | 6.4" |
| November | 33°F | 56°F | 44°F | 6.5" |
| December | 25°F | 39°F | 31°F | 3.6" |
| Index | Coalmont | Indiana | National |
| Air quality index | 45 | 56 | 42 |
| Pollution index | 589,222 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 237 |
| Days with moderate air quality | 127 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Linton, IN | 5,293 | 1 | 98.0% |
| Lyons, IN | 880 | 1 | 98.0% |
| Switz City, IN | 307 | 1 | 98.0% |
| Worthington, IN | 1,539 | 42 | 16.0% |
| Hymera, IN | 989 | 45 | 10.0% |
| Coalmont, IN | 221 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Newbern, AL | 221 | 35 | 30.0% |
| Widener, AR | 221 | 45 | 10.0% |
| Jeddito, AZ | 221 | 17 | 66.0% |
| Conroy, IA | 221 | 39 | 22.0% |
| Moorhead, IA | 221 | 40 | 20.0% |
| Coalmont, IN | 221 | 45 | 10.0% |
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