| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 50°F | 38°F | 6.7" |
| February | 29°F | 54°F | 40°F | 5.6" |
| March | 37°F | 63°F | 49°F | 5.3" |
| April | 46°F | 74°F | 59°F | 9.4" |
| May | 53°F | 79°F | 66°F | 8.4" |
| June | 61°F | 87°F | 73°F | 8.4" |
| July | 65°F | 89°F | 76°F | 6.9" |
| August | 64°F | 88°F | 75°F | 8.4" |
| September | 58°F | 82°F | 68°F | 7.6" |
| October | 46°F | 72°F | 57°F | 9.4" |
| November | 35°F | 61°F | 47°F | 8.1" |
| December | 32°F | 53°F | 41°F | 7.1" |
| Index | Collinsville | Virginia | National |
| Air quality index | 38 | 58 | 42 |
| Pollution index | 533,491 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 326 |
| Days with moderate air quality | 39 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| 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. |
| Oak Level, VA | 466 | 38 | 24.0% |
| Fieldale, VA | 1,095 | 38 | 24.0% |
| Ferrum, VA | 2,148 | 38 | 24.0% |
| Stanleytown, VA | 1,264 | 38 | 24.0% |
| Villa Heights, VA | 605 | 38 | 24.0% |
| Collinsville, VA | 7,019 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Souderton, PA | 7,019 | 42 | 16.0% |
| Elkins, WV | 7,017 | 31 | 38.0% |
| Crete, NE | 7,013 | 31 | 38.0% |
| St. Augustine Beach, FL | 7,010 | 31 | 38.0% |
| Commerce, GA | 7,008 | 44 | 12.0% |
| Collinsville, VA | 7,019 | 38 | 24.0% |
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