| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 44°F | 34°F | 3.0" |
| February | 28°F | 46°F | 36°F | 5.4" |
| March | 37°F | 56°F | 45°F | 4.1" |
| April | 46°F | 66°F | 55°F | 8.1" |
| May | 54°F | 72°F | 62°F | 6.4" |
| June | 61°F | 80°F | 70°F | 4.2" |
| July | 64°F | 82°F | 72°F | 5.2" |
| August | 64°F | 81°F | 71°F | 8.4" |
| September | 57°F | 75°F | 65°F | 12.4" |
| October | 47°F | 66°F | 56°F | 13.8" |
| November | 37°F | 56°F | 45°F | 6.0" |
| December | 32°F | 48°F | 39°F | 5.2" |
| Index | Allisonia | Virginia | National |
| Air quality index | 41 | 58 | 42 |
| Pollution index | 243,902 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 306 |
| Days with moderate air quality | 55 |
| Days w/ poor A.Q. for sensitive groups | 4 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Pulaski, VA | 9,058 | 41 | 18.0% |
| Hillsville, VA | 2,737 | 41 | 18.0% |
| Radford, VA | 18,418 | 41 | 18.0% |
| Fort Chiswell, VA | 821 | 41 | 18.0% |
| Draper, VA | 705 | 41 | 18.0% |
| Allisonia, VA | 117 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Martell, CA | 117 | 39 | 22.0% |
| Snelling, CA | 117 | 48 | 4.0% |
| Derby, IA | 117 | 39 | 22.0% |
| North Buena Vista, IA | 117 | 29 | 42.0% |
| Brussels, IL | 117 | 54 | 8.0% |
| Allisonia, VA | 117 | 41 | 18.0% |