| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 34°F | 26°F | 4.3" |
| February | 19°F | 36°F | 27°F | 4.1" |
| March | 32°F | 51°F | 41°F | 5.8" |
| April | 41°F | 65°F | 52°F | 7.7" |
| May | 52°F | 74°F | 63°F | 7.7" |
| June | 61°F | 82°F | 72°F | 10.1" |
| July | 64°F | 84°F | 74°F | 6.8" |
| August | 62°F | 83°F | 72°F | 10.2" |
| September | 55°F | 77°F | 66°F | 6.2" |
| October | 44°F | 66°F | 54°F | 5.8" |
| November | 33°F | 52°F | 42°F | 6.4" |
| December | 24°F | 39°F | 31°F | 4.7" |
| Index | Wabash | 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% |
| Landess, IN | 89 | 31 | 38.0% |
| La Fontaine, IN | 1,113 | 37 | 26.0% |
| Amboy, IN | 363 | 37 | 26.0% |
| Wabash, IN | 10,017 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Paris, TN | 10,021 | 27 | 46.0% |
| Yarmouth, NS | 10,021 | n/a | |
| Le Mars, IA | 10,012 | 35 | 30.0% |
| Lacombe County, AB | 10,012 | n/a | |
| Rodeo, CA | 10,023 | 40 | 20.0% |
| Wabash, IN | 10,017 | 37 | 26.0% |
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