| 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 | Morrilton | Arkansas | National |
| Air quality index | 45 | 38 | 42 |
| Pollution index | 410,477 | 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 | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Adona, AR | 198 | 45 | 10.0% |
| Menifee, AR | 195 | 45 | 10.0% |
| Plumerville, AR | 745 | 45 | 10.0% |
| Bigelow, AR | 411 | 45 | 10.0% |
| Oppelo, AR | 832 | 45 | 10.0% |
| Morrilton, AR | 6,638 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Harrisville, UT | 6,637 | 45 | 10.0% |
| Cariboo A, BC | 6,636 | n/a | |
| Litchfield, MN | 6,640 | 32 | 36.0% |
| North Caldwell, NJ | 6,640 | 51 | 2.0% |
| Blackwell, OK | 6,634 | 40 | 20.0% |
| Morrilton, AR | 6,638 | 45 | 10.0% |
Here are the best places to live in Arkansas
See the best places to live in Morrilton
Check out the 10 most dangerous cities in Arkansas
Safest States In The US