| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 51°F | 39°F | 3.2" |
| February | 30°F | 54°F | 41°F | 2.3" |
| March | 38°F | 63°F | 50°F | 3.4" |
| April | 46°F | 73°F | 59°F | 3.6" |
| May | 54°F | 79°F | 66°F | 4.5" |
| June | 63°F | 87°F | 75°F | 4.2" |
| July | 68°F | 90°F | 78°F | 5.2" |
| August | 67°F | 89°F | 77°F | 3.7" |
| September | 60°F | 83°F | 70°F | 4.0" |
| October | 48°F | 73°F | 59°F | 3.5" |
| November | 36°F | 63°F | 48°F | 3.8" |
| December | 32°F | 54°F | 42°F | 3.6" |
| Index | Danville | Virginia | National |
| Air quality index | 31 | 58 | 42 |
| Pollution index | 1,421,810 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 356 |
| Days with good air quality | 313 |
| Days with moderate air quality | 43 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.140% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Milton, NC | 239 | 31 | 38.0% |
| Blairs, VA | 819 | 31 | 38.0% |
| Ruffin, NC | 467 | 31 | 38.0% |
| Yanceyville, NC | 2,830 | 31 | 38.0% |
| Mount Hermon, VA | 4,417 | 31 | 38.0% |
| Danville, VA | 40,668 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Hutchinson, KS | 40,669 | 40 | 20.0% |
| Lakeshore, ON | 40,673 | n/a | |
| Florence, AL | 40,652 | 37 | 26.0% |
| Maplewood, MN | 40,684 | 46 | 8.0% |
| Brant, ON | 40,692 | n/a | |
| Danville, VA | 40,668 | 31 | 38.0% |
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