| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 53°F | 40°F | 4.4" |
| February | 34°F | 56°F | 44°F | 5.2" |
| March | 43°F | 66°F | 54°F | 6.4" |
| April | 51°F | 75°F | 63°F | 8.7" |
| May | 60°F | 82°F | 70°F | 8.2" |
| June | 69°F | 91°F | 80°F | 3.8" |
| July | 71°F | 93°F | 82°F | 7.7" |
| August | 71°F | 92°F | 81°F | 5.9" |
| September | 63°F | 86°F | 73°F | 5.7" |
| October | 51°F | 76°F | 62°F | 5.3" |
| November | 41°F | 64°F | 51°F | 5.8" |
| December | 34°F | 54°F | 43°F | 8.1" |
| Index | Greenbrier | Arkansas | National |
| Air quality index | 45 | 38 | 42 |
| Pollution index | 2,326,950 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 235 |
| Days with moderate air quality | 130 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.040% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.160% |
| City | Population | Air Quality Index | National Avg. |
| Plumerville, AR | 745 | 45 | 10.0% |
| Holland, AR | 507 | 45 | 10.0% |
| Center Ridge, AR | 541 | 45 | 10.0% |
| Vilonia, AR | 4,556 | 45 | 10.0% |
| Mount Vernon, AR | 178 | 45 | 10.0% |
| Greenbrier, AR | 5,592 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Paoli, PA | 5,591 | 51 | 2.0% |
| Woodside, CA | 5,593 | 43 | 14.0% |
| Sansom Park, TX | 5,593 | 33 | 34.0% |
| Greenview No. 16, AB | 5,593 | n/a | |
| Berryville, AR | 5,594 | 18 | 64.0% |
| Greenbrier, AR | 5,592 | 45 | 10.0% |
Here are the best places to live in Arkansas
Top 10 cities in Arkansas with the best education system
These are the 10 most affordable cities in Arkansas
10 Best cities in Arkansas for employment