| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 48°F | 38°F | 5.6" |
| February | 32°F | 52°F | 41°F | 4.8" |
| March | 43°F | 65°F | 53°F | 2.6" |
| April | 47°F | 69°F | 57°F | 6.0" |
| May | 56°F | 79°F | 67°F | 6.2" |
| June | 65°F | 87°F | 75°F | 5.7" |
| July | 68°F | 88°F | 77°F | 8.5" |
| August | 71°F | 95°F | 82°F | 6.3" |
| September | 63°F | 86°F | 73°F | 9.3" |
| October | 51°F | 72°F | 60°F | 3.4" |
| November | 40°F | 62°F | 50°F | 5.6" |
| December | 31°F | 49°F | 39°F | 2.7" |
| Index | Ava | Missouri | National |
| Air quality index | 39 | 97 | 42 |
| Pollution index | 554,466 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 322 |
| Days with moderate air quality | 43 |
| 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 | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Wasola, MO | 157 | 18 | 64.0% |
| Norwood, MO | 680 | 39 | 22.0% |
| Seymour, MO | 1,913 | 39 | 22.0% |
| Mansfield, MO | 1,257 | 39 | 22.0% |
| Diggins, MO | 314 | 39 | 22.0% |
| Ava, MO | 2,903 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Butler, AL | 2,902 | 36 | 28.0% |
| Grenville-sur-la-Rouge, QC | 2,904 | n/a | |
| Pretty Bayou, FL | 2,901 | 38 | 24.0% |
| Williamstown, WV | 2,901 | 35 | 30.0% |
| Port Richey, FL | 2,900 | 43 | 14.0% |
| Ava, MO | 2,903 | 39 | 22.0% |
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