| 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 | Danville | Arkansas | National |
| Air quality index | 38 | 38 | 42 |
| Pollution index | 1,468,480 | 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 | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.004% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Havana, AR | 435 | 36 | 28.0% |
| Plainview, AR | 588 | 38 | 24.0% |
| Belleville, AR | 852 | 38 | 24.0% |
| Corinth, AR | 42 | 38 | 24.0% |
| Dardanelle, AR | 4,541 | 38 | 24.0% |
| Danville, AR | 2,197 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Halstead, KS | 2,197 | 40 | 20.0% |
| Cuba City, WI | 2,197 | 29 | 42.0% |
| Cowichan, BC | 2,197 | n/a | |
| New Wilmington, PA | 2,196 | 31 | 38.0% |
| Purvis, MS | 2,198 | 35 | 30.0% |
| Danville, AR | 2,197 | 38 | 24.0% |
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