| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 54°F | 42°F | 3.5" |
| February | 36°F | 57°F | 45°F | 3.7" |
| March | 45°F | 67°F | 55°F | 6.2" |
| April | 53°F | 76°F | 63°F | 6.6" |
| May | 61°F | 82°F | 70°F | 6.8" |
| June | 70°F | 91°F | 80°F | 4.2" |
| July | 73°F | 94°F | 82°F | 4.8" |
| August | 72°F | 93°F | 82°F | 4.1" |
| September | 64°F | 87°F | 75°F | 3.3" |
| October | 53°F | 76°F | 64°F | 4.7" |
| November | 44°F | 65°F | 53°F | 4.7" |
| December | 36°F | 56°F | 45°F | 5.4" |
| Index | Perla | Arkansas | National |
| Air quality index | 38 | 38 | 42 |
| Pollution index | 1,270,470 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 121 |
| Days with good air quality | 93 |
| Days with moderate air quality | 28 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Donaldson, AR | 348 | 32 | 36.0% |
| Friendship, AR | 230 | 32 | 36.0% |
| Leola, AR | 704 | 32 | 36.0% |
| Rockport, AR | 819 | 38 | 24.0% |
| Malvern, AR | 10,886 | 38 | 24.0% |
| Perla, AR | 204 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Bear Valley, CA | 204 | 48 | 4.0% |
| Bloomington, ID | 204 | 44 | 12.0% |
| Eldred, IL | 204 | 54 | 8.0% |
| Indianola, IL | 204 | 42 | 16.0% |
| Rockholds, KY | 204 | 39 | 22.0% |
| Perla, AR | 204 | 38 | 24.0% |
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