| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 53°F | 40°F | 3.1" |
| February | 32°F | 56°F | 43°F | 2.3" |
| March | 42°F | 67°F | 54°F | 5.0" |
| April | 50°F | 76°F | 62°F | 5.1" |
| May | 59°F | 82°F | 70°F | 5.6" |
| June | 68°F | 91°F | 79°F | 3.4" |
| July | 71°F | 94°F | 81°F | 4.1" |
| August | 70°F | 93°F | 81°F | 4.0" |
| September | 62°F | 86°F | 73°F | 3.4" |
| October | 51°F | 76°F | 62°F | 3.7" |
| November | 40°F | 65°F | 51°F | 4.1" |
| December | 33°F | 54°F | 42°F | 4.7" |
| Index | Perryville | Arkansas | National |
| Air quality index | 45 | 38 | 50 |
| Pollution index | 1,468,480 | 1,270,108 | 5,066,862 |
| 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 | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.004% |
| Mercury | 0.001% |
| City, State | Population | Air Quality Index | National Avg. |
| Casa, AR | 207 | 38 | 24% |
| Bigelow, AR | 377 | 45 | 10% |
| Menifee, AR | 247 | 45 | 10% |
| Plumerville, AR | 1,031 | 45 | 10% |
| Morrilton, AR | 6,746 | 45 | 10% |
| Perryville, AR | 1,616 | 45 | 10% |
| City, State | Population | Air Quality Index | National Avg. |
| Dayton, IN | 1,616 | 42 | 16% |
| Lewisport, KY | 1,617 | 43 | 14% |
| Brownsville, OR | 1,615 | 28 | 44% |
| Slater, IA | 1,617 | 37 | 26% |
| Smith Center, KS | 1,615 | 19 | 62% |
| Perryville, AR | 1,616 | 45 | 10% |
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