| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 51°F | 40°F | 4.0" |
| February | 33°F | 54°F | 42°F | 4.4" |
| March | 40°F | 63°F | 50°F | 4.2" |
| April | 49°F | 72°F | 60°F | 4.4" |
| May | 56°F | 78°F | 66°F | 5.9" |
| June | 64°F | 86°F | 74°F | 7.1" |
| July | 68°F | 88°F | 77°F | 6.0" |
| August | 67°F | 87°F | 76°F | 5.8" |
| September | 61°F | 81°F | 70°F | 7.5" |
| October | 50°F | 71°F | 59°F | 4.6" |
| November | 39°F | 61°F | 49°F | 6.9" |
| December | 35°F | 54°F | 44°F | 6.3" |
| Index | Clarksville | Virginia | National |
| Air quality index | 44 | 58 | 42 |
| Pollution index | 357,964 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 275 |
| Days with moderate air quality | 90 |
| 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 | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Fairview, VA | 145 | 26 | 48.0% |
| Thynedale, VA | 49 | 26 | 48.0% |
| Scottsburg, VA | 112 | 26 | 48.0% |
| Chase City, VA | 2,763 | 26 | 48.0% |
| Stovall, NC | 286 | 44 | 12.0% |
| Clarksville, VA | 1,766 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Ogden, IA | 1,767 | 37 | 26.0% |
| Greilickville, MI | 1,765 | 36 | 28.0% |
| West Jefferson, NC | 1,767 | 26 | 48.0% |
| San Felipe Pueblo, NM | 1,767 | 53 | 6.0% |
| Houserville, PA | 1,765 | 44 | 12.0% |
| Clarksville, VA | 1,766 | 44 | 12.0% |
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