| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 49°F | 40°F | 10.9" |
| February | 34°F | 52°F | 41°F | 7.4" |
| March | 43°F | 68°F | 53°F | 5.4" |
| April | 49°F | 71°F | 59°F | 8.1" |
| May | 59°F | 83°F | 70°F | 9.3" |
| June | 69°F | 90°F | 79°F | 3.3" |
| July | 70°F | 89°F | 79°F | 9.9" |
| August | 72°F | 95°F | 82°F | 1.9" |
| September | 65°F | 87°F | 74°F | 4.3" |
| October | 52°F | 76°F | 62°F | 15.9" |
| November | 42°F | 64°F | 51°F | 5.4" |
| December | 32°F | 50°F | 39°F | 7.9" |
| Index | Highland | Arkansas | National |
| Air quality index | 36 | 38 | 42 |
| Pollution index | 1,415,520 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 347 |
| Days with moderate air quality | 18 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.003% |
| Lead | 0.004% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Ash Flat, AR | 1,198 | 36 | 28.0% |
| Hardy, AR | 765 | 36 | 28.0% |
| Cherokee Village, AR | 4,883 | 36 | 28.0% |
| Horseshoe Bend, AR | 2,692 | 36 | 28.0% |
| Evening Shade, AR | 347 | 36 | 28.0% |
| Highland, AR | 1,232 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Indian Shores, FL | 1,232 | 43 | 14.0% |
| Edmore, MI | 1,232 | 38 | 24.0% |
| Litchfield, MI | 1,232 | 39 | 22.0% |
| Country Club Hills, MO | 1,232 | 54 | 8.0% |
| Upton, WY | 1,232 | 40 | 20.0% |
| Highland, AR | 1,232 | 36 | 28.0% |
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