| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 36°F | 29°F | 3.5" |
| February | 27°F | 43°F | 34°F | 1.7" |
| March | 36°F | 56°F | 45°F | 5.3" |
| April | 43°F | 65°F | 53°F | 5.1" |
| May | 53°F | 74°F | 63°F | 3.8" |
| June | 61°F | 83°F | 71°F | 3.9" |
| July | 61°F | 88°F | 75°F | 2.7" |
| August | 57°F | 86°F | 71°F | 5.4" |
| September | 54°F | 78°F | 65°F | 8.2" |
| October | 45°F | 66°F | 54°F | 4.8" |
| November | 35°F | 54°F | 43°F | 4.4" |
| December | 27°F | 40°F | 33°F | 5.4" |
| Index | Lagro | Indiana | National |
| Air quality index | 37 | 56 | 42 |
| Pollution index | 1,806,400 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 351 |
| Days with good air quality | 319 |
| Days with moderate air quality | 32 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.100% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Mount Etna, IN | 132 | 31 | 38.0% |
| Andrews, IN | 1,174 | 31 | 38.0% |
| Huntington, IN | 17,083 | 31 | 38.0% |
| Roann, IN | 340 | 37 | 26.0% |
| Jalapa, IN | 143 | 37 | 26.0% |
| Lagro, IN | 422 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Noatak, AK | 422 | 38 | 24.0% |
| Sasser, GA | 422 | 40 | 20.0% |
| Albion, ID | 422 | 20 | 60.0% |
| Madison, MO | 422 | 38 | 24.0% |
| Shubuta, MS | 422 | 36 | 28.0% |
| Lagro, IN | 422 | 37 | 26.0% |
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