| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 40°F | 31°F | 6.8" |
| February | 27°F | 44°F | 34°F | 4.4" |
| March | 39°F | 60°F | 48°F | 3.5" |
| April | 45°F | 66°F | 55°F | 5.5" |
| May | 58°F | 78°F | 67°F | 4.3" |
| June | 66°F | 85°F | 75°F | 13.6" |
| July | 68°F | 89°F | 78°F | 5.0" |
| August | 70°F | 91°F | 80°F | 12.7" |
| September | 62°F | 83°F | 72°F | 6.1" |
| October | 50°F | 70°F | 59°F | 4.9" |
| November | 38°F | 58°F | 47°F | 4.1" |
| December | 25°F | 40°F | 32°F | 2.7" |
| Index | Versailles | Missouri | National |
| Air quality index | 39 | 97 | 42 |
| Pollution index | 803,186 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 245 |
| Days with good air quality | 238 |
| Days with moderate air quality | 7 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| 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. |
| Bagnell, MO | 69 | 39 | 22.0% |
| Stover, MO | 1,004 | 39 | 22.0% |
| Barnett, MO | 226 | 39 | 22.0% |
| Eldon, MO | 4,671 | 39 | 22.0% |
| Gravois Mills, MO | 151 | 39 | 22.0% |
| Versailles, MO | 2,983 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Byrnes Mill, MO | 2,983 | 54 | 8.0% |
| Tularosa, NM | 2,983 | 10 | 80.0% |
| Walsenburg, CO | 2,982 | 20 | 60.0% |
| De Leon Springs, FL | 2,982 | 37 | 26.0% |
| Nocona, TX | 2,982 | 43 | 14.0% |
| Versailles, MO | 2,983 | 39 | 22.0% |
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