| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 39°F | 30°F | 3.4" |
| February | 26°F | 44°F | 34°F | 4.5" |
| March | 39°F | 60°F | 48°F | 4.2" |
| April | 46°F | 65°F | 55°F | 5.0" |
| May | 57°F | 77°F | 66°F | 15.6" |
| June | 66°F | 84°F | 75°F | 13.9" |
| July | 69°F | 89°F | 79°F | 4.9" |
| August | 71°F | 90°F | 80°F | 14.0" |
| September | 63°F | 83°F | 72°F | 4.6" |
| October | 50°F | 68°F | 58°F | 4.6" |
| November | 38°F | 58°F | 47°F | 2.7" |
| December | 24°F | 39°F | 31°F | 2.8" |
| Index | La Tour | Missouri | National |
| Air quality index | 47 | 97 | 42 |
| Pollution index | 814,087 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 210 |
| Days with moderate air quality | 154 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| East Lynne, MO | 184 | 47 | 6.0% |
| Archie, MO | 1,225 | 47 | 6.0% |
| Holden, MO | 2,065 | 47 | 6.0% |
| Lake Winnebago, MO | 1,174 | 47 | 6.0% |
| Hartwell, MO | 99 | 47 | 6.0% |
| La Tour, MO | 157 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Richvale, CA | 157 | 46 | 8.0% |
| Aucilla, FL | 157 | 40 | 20.0% |
| Braddyville, IA | 157 | 43 | 14.0% |
| Mount Auburn, IA | 157 | 39 | 22.0% |
| Mellott, IN | 157 | 42 | 16.0% |
| La Tour, MO | 157 | 47 | 6.0% |
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