| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 40°F | 31°F | 5.3" |
| February | 24°F | 43°F | 33°F | 3.4" |
| March | 36°F | 57°F | 45°F | 4.0" |
| April | 46°F | 69°F | 56°F | 7.6" |
| May | 56°F | 77°F | 66°F | 6.3" |
| June | 64°F | 86°F | 75°F | 6.7" |
| July | 66°F | 87°F | 76°F | 5.7" |
| August | 63°F | 86°F | 74°F | 4.9" |
| September | 56°F | 82°F | 67°F | 5.9" |
| October | 46°F | 70°F | 57°F | 5.6" |
| November | 35°F | 56°F | 44°F | 5.6" |
| December | 28°F | 44°F | 35°F | 4.9" |
| Index | Dugger | Indiana | National |
| Air quality index | 45 | 56 | 42 |
| Pollution index | 896,281 | 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 | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Elnora, IN | 519 | 1 | 98.0% |
| Newberry, IN | 140 | 1 | 98.0% |
| Westphalia, IN | 50 | 1 | 98.0% |
| Freelandville, IN | 759 | 1 | 98.0% |
| Linton, IN | 5,293 | 1 | 98.0% |
| Dugger, IN | 870 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Hills, IA | 870 | 35 | 30.0% |
| Downey, ID | 870 | 27 | 46.0% |
| Au Gres, MI | 870 | 26 | 48.0% |
| Brookside, OH | 870 | 39 | 22.0% |
| Killbuck, OH | 870 | 41 | 18.0% |
| Dugger, IN | 870 | 45 | 10.0% |
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