| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 45°F | 35°F | 2.3" |
| February | 28°F | 48°F | 37°F | 3.2" |
| March | 36°F | 58°F | 46°F | 3.1" |
| April | 44°F | 69°F | 56°F | 4.4" |
| May | 53°F | 75°F | 63°F | 5.2" |
| June | 61°F | 83°F | 71°F | 4.6" |
| July | 64°F | 85°F | 74°F | 6.2" |
| August | 63°F | 84°F | 73°F | 7.2" |
| September | 57°F | 78°F | 66°F | 4.6" |
| October | 46°F | 68°F | 56°F | 7.1" |
| November | 36°F | 57°F | 46°F | 4.4" |
| December | 31°F | 49°F | 39°F | 3.5" |
| Index | Glen Lyn | Virginia | National |
| Air quality index | 41 | 58 | 42 |
| Pollution index | 1,956,300 | 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 | 0.003% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.002% |
| Mercury | 0.005% |
| City | Population | Air Quality Index | National Avg. |
| Pearisburg, VA | 2,637 | 41 | 18.0% |
| Pembroke, VA | 1,201 | 41 | 18.0% |
| Oakvale, WV | 201 | 41 | 18.0% |
| Belspring, VA | 186 | 41 | 18.0% |
| Narrows, VA | 2,108 | 41 | 18.0% |
| Glen Lyn, VA | 92 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Rock House, AZ | 92 | 44 | 12.0% |
| Big Lagoon, CA | 92 | 27 | 46.0% |
| Ricketts, IA | 92 | 35 | 30.0% |
| Bishop Hill, IL | 92 | 46 | 8.0% |
| Mount Auburn, IN | 92 | 28 | 44.0% |
| Glen Lyn, VA | 92 | 41 | 18.0% |
Here are the best places to live in Virginia
Most Dangerous Cities In The US
Safest States In The US
Check out the 10 most dangerous cities in Virginia