| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 33°F | 26°F | 1.4" |
| February | 20°F | 35°F | 27°F | 2.3" |
| March | 31°F | 49°F | 39°F | 4.2" |
| April | 40°F | 62°F | 50°F | 5.9" |
| May | 51°F | 72°F | 61°F | 7.2" |
| June | 60°F | 81°F | 70°F | 5.5" |
| July | 63°F | 83°F | 73°F | 5.5" |
| August | 61°F | 81°F | 71°F | 3.1" |
| September | 55°F | 75°F | 64°F | 4.0" |
| October | 44°F | 63°F | 53°F | 0.3" |
| November | 34°F | 50°F | 41°F | 6.5" |
| December | 25°F | 37°F | 31°F | 2.8" |
| Index | Etna Green | Indiana | National |
| Air quality index | 37 | 56 | 42 |
| Pollution index | 4,313,200 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 294 |
| Days with moderate air quality | 71 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.130% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Winona Lake, IN | 5,053 | 31 | 38.0% |
| Mentone, IN | 1,233 | 37 | 26.0% |
| Burket, IN | 187 | 37 | 26.0% |
| Silver Lake, IN | 1,090 | 37 | 26.0% |
| Milford, IN | 1,713 | 37 | 26.0% |
| Etna Green, IN | 577 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Elephant Head, AZ | 577 | 47 | 6.0% |
| Warm Springs, GA | 577 | 42 | 16.0% |
| Damiansville, IL | 577 | 54 | 8.0% |
| Teachey, NC | 577 | 34 | 32.0% |
| Tannersville, NY | 577 | 36 | 28.0% |
| Etna Green, IN | 577 | 37 | 26.0% |