| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 45°F | 35°F | 3.7" |
| February | 29°F | 47°F | 37°F | 3.9" |
| March | 39°F | 61°F | 49°F | 5.6" |
| April | 47°F | 70°F | 58°F | 5.4" |
| May | 57°F | 78°F | 67°F | 6.0" |
| June | 67°F | 89°F | 77°F | 2.9" |
| July | 68°F | 89°F | 78°F | 4.2" |
| August | 67°F | 90°F | 78°F | 3.2" |
| September | 59°F | 82°F | 70°F | 3.9" |
| October | 46°F | 70°F | 57°F | 6.3" |
| November | 38°F | 59°F | 48°F | 3.0" |
| December | 29°F | 46°F | 37°F | 5.5" |
| Index | Grayridge | Missouri | National |
| Air quality index | 26 | 97 | 42 |
| Pollution index | 2,322,230 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 360 |
| Days with good air quality | 341 |
| Days with moderate air quality | 19 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.230% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.120% |
| City | Population | Air Quality Index | National Avg. |
| Baker, MO | 0 | 26 | 48.0% |
| Essex, MO | 453 | 26 | 48.0% |
| Morehouse, MO | 841 | 26 | 48.0% |
| Parma, MO | 616 | 26 | 48.0% |
| Penermon, MO | 122 | 26 | 48.0% |
| Grayridge, MO | 147 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Bassett, AR | 147 | 45 | 10.0% |
| Day, FL | 147 | 38 | 24.0% |
| Barnes City, IA | 147 | 35 | 30.0% |
| Rutland, IA | 147 | 37 | 26.0% |
| Norway, IN | 147 | 42 | 16.0% |
| Grayridge, MO | 147 | 26 | 48.0% |
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