| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 45°F | 34°F | 3.8" |
| February | 26°F | 48°F | 36°F | 3.1" |
| March | 36°F | 60°F | 48°F | 4.7" |
| April | 45°F | 72°F | 59°F | 5.9" |
| May | 55°F | 79°F | 67°F | 4.9" |
| June | 64°F | 88°F | 76°F | 4.3" |
| July | 67°F | 90°F | 78°F | 5.2" |
| August | 66°F | 90°F | 77°F | 3.2" |
| September | 58°F | 84°F | 70°F | 4.2" |
| October | 46°F | 73°F | 59°F | 3.9" |
| November | 35°F | 60°F | 47°F | 4.1" |
| December | 29°F | 48°F | 38°F | 4.8" |
| Index | Darmstadt | Indiana | National |
| Air quality index | 45 | 56 | 42 |
| Pollution index | 4,284,280 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 244 |
| Days with moderate air quality | 111 |
| Days w/ poor A.Q. for sensitive groups | 10 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.005% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Newburgh, IN | 3,263 | 45 | 10.0% |
| Fort Branch, IN | 3,381 | 45 | 10.0% |
| Owensville, IN | 1,391 | 45 | 10.0% |
| Chandler, IN | 3,669 | 45 | 10.0% |
| Haubstadt, IN | 1,738 | 45 | 10.0% |
| Darmstadt, IN | 1,189 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Elgin, MN | 1,189 | 36 | 28.0% |
| Duncansville, PA | 1,189 | 41 | 18.0% |
| Pocono Ranch Lands, PA | 1,189 | 34 | 32.0% |
| Due West, SC | 1,189 | 31 | 38.0% |
| McAdam, NB | 1,189 | n/a | |
| Darmstadt, IN | 1,189 | 45 | 10.0% |
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