| 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 | Fairlawn | 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. |
| Christiansburg, VA | 22,482 | 41 | 18.0% |
| Belview, VA | 999 | 41 | 18.0% |
| Merrimac, VA | 2,893 | 41 | 18.0% |
| Pembroke, VA | 1,201 | 41 | 18.0% |
| Riner, VA | 1,196 | 41 | 18.0% |
| Fairlawn, VA | 2,656 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Lexington Hills, CA | 2,656 | 35 | 30.0% |
| La Mesilla, NM | 2,656 | 41 | 18.0% |
| Gastonville, PA | 2,656 | 56 | 12.0% |
| Hartley, CA | 2,655 | 35 | 30.0% |
| Casey, IL | 2,655 | 40 | 20.0% |
| Fairlawn, VA | 2,656 | 41 | 18.0% |
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