| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 47°F | 36°F | 3.2" |
| February | 30°F | 49°F | 39°F | 3.4" |
| March | 40°F | 62°F | 50°F | 5.9" |
| April | 49°F | 72°F | 60°F | 7.0" |
| May | 58°F | 79°F | 68°F | 5.6" |
| June | 68°F | 89°F | 78°F | 3.1" |
| July | 70°F | 90°F | 79°F | 4.3" |
| August | 68°F | 89°F | 77°F | 3.5" |
| September | 60°F | 83°F | 70°F | 4.2" |
| October | 48°F | 73°F | 59°F | 4.1" |
| November | 38°F | 60°F | 48°F | 4.7" |
| December | 32°F | 49°F | 39°F | 5.2" |
| Index | Greenway | Arkansas | National |
| Air quality index | 26 | 38 | 42 |
| Pollution index | 933,847 | 1,487,822 | 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 | 0.002% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Malden, MO | 4,136 | 26 | 48.0% |
| Piggott, AR | 3,579 | 26 | 48.0% |
| St. Francis, AR | 258 | 26 | 48.0% |
| Kennett, MO | 10,069 | 26 | 48.0% |
| McDougal, AR | 51 | 26 | 48.0% |
| Greenway, AR | 172 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Ethelsville, AL | 172 | 35 | 30.0% |
| Spring Garden, AL | 172 | 43 | 14.0% |
| East Nicolaus, CA | 172 | 44 | 12.0% |
| Honcut, CA | 172 | 44 | 12.0% |
| Florissant, CO | 172 | 45 | 10.0% |
| Greenway, AR | 172 | 26 | 48.0% |
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