| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 48°F | 36°F | 3.5" |
| February | 27°F | 50°F | 38°F | 2.4" |
| March | 36°F | 61°F | 47°F | 3.8" |
| April | 45°F | 71°F | 57°F | 4.0" |
| May | 52°F | 77°F | 64°F | 4.8" |
| June | 61°F | 85°F | 73°F | 4.0" |
| July | 65°F | 88°F | 76°F | 3.9" |
| August | 64°F | 87°F | 75°F | 3.3" |
| September | 58°F | 80°F | 68°F | 3.5" |
| October | 46°F | 70°F | 57°F | 3.9" |
| November | 35°F | 60°F | 47°F | 3.3" |
| December | 30°F | 51°F | 40°F | 4.0" |
| Index | Glasgow | Virginia | National |
| Air quality index | 26 | 58 | 42 |
| Pollution index | 92,491 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 108 |
| Days with good air quality | 107 |
| Days with moderate air quality | 1 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.001% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Big Island, VA | 174 | 26 | 48.0% |
| Buena Vista, VA | 6,477 | 26 | 48.0% |
| East Lexington, VA | 1,959 | 26 | 48.0% |
| Lexington, VA | 7,205 | 26 | 48.0% |
| Buchanan, VA | 1,172 | 38 | 24.0% |
| Glasgow, VA | 1,306 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Shell Knob, MO | 1,306 | 18 | 64.0% |
| Tatum, TX | 1,306 | 38 | 24.0% |
| Charlo, NB | 1,306 | n/a | |
| Pointe-aux-Outardes, QC | 1,306 | n/a | |
| Minneota, MN | 1,307 | 32 | 36.0% |
| Glasgow, VA | 1,306 | 26 | 48.0% |
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