| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 44°F | 31°F | 2.0" |
| February | 23°F | 47°F | 33°F | 2.1" |
| March | 35°F | 61°F | 46°F | 3.0" |
| April | 44°F | 71°F | 57°F | 5.7" |
| May | 53°F | 78°F | 65°F | 4.3" |
| June | 63°F | 87°F | 75°F | 4.8" |
| July | 67°F | 90°F | 78°F | 5.1" |
| August | 65°F | 89°F | 76°F | 3.9" |
| September | 57°F | 82°F | 69°F | 4.8" |
| October | 45°F | 71°F | 57°F | 3.9" |
| November | 35°F | 59°F | 46°F | 2.4" |
| December | 25°F | 45°F | 34°F | 2.7" |
| Index | Fulton | Missouri | National |
| Air quality index | 38 | 97 | 42 |
| Pollution index | 1,482,560 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 245 |
| Days with good air quality | 239 |
| Days with moderate air quality | 6 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Auxvasse, MO | 1,229 | 38 | 24.0% |
| Kingdom City, MO | 156 | 38 | 24.0% |
| Chamois, MO | 431 | 39 | 22.0% |
| New Bloomfield, MO | 755 | 39 | 22.0% |
| Mokane, MO | 390 | 39 | 22.0% |
| Fulton, MO | 12,696 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Smithfield, NC | 12,697 | 40 | 20.0% |
| Crowley, LA | 12,689 | 41 | 18.0% |
| St. Ann, MO | 12,689 | 54 | 8.0% |
| Echelon, NJ | 12,687 | 51 | 2.0% |
| Endicott, NY | 12,684 | 36 | 28.0% |
| Fulton, MO | 12,696 | 38 | 24.0% |
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