| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 48°F | 38°F | 3.6" |
| February | 30°F | 50°F | 40°F | 2.6" |
| March | 38°F | 60°F | 48°F | 3.5" |
| April | 48°F | 71°F | 59°F | 4.1" |
| May | 57°F | 77°F | 66°F | 4.7" |
| June | 65°F | 86°F | 75°F | 5.0" |
| July | 69°F | 89°F | 78°F | 3.9" |
| August | 67°F | 87°F | 76°F | 4.2" |
| September | 61°F | 80°F | 70°F | 4.1" |
| October | 50°F | 71°F | 59°F | 4.8" |
| November | 39°F | 60°F | 48°F | 3.9" |
| December | 33°F | 52°F | 42°F | 4.3" |
| Index | Mechanicsville | Virginia | National |
| Air quality index | 44 | 58 | 42 |
| Pollution index | 93,686 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 272 |
| Days with moderate air quality | 93 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Short Pump, VA | 27,385 | 44 | 12.0% |
| Bellwood, VA | 7,808 | 44 | 12.0% |
| Dumbarton, VA | 8,411 | 44 | 12.0% |
| Laurel, VA | 17,678 | 44 | 12.0% |
| Rockwood, VA | 8,008 | 44 | 12.0% |
| Mechanicsville, VA | 37,141 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Aventura, FL | 37,151 | 41 | 18.0% |
| Richmond West, FL | 37,123 | 41 | 18.0% |
| Cottage Grove, MN | 37,120 | 46 | 8.0% |
| Greenfield, WI | 37,117 | 44 | 12.0% |
| Côte-Saint-Luc, QC | 37,097 | n/a | |
| Mechanicsville, VA | 37,141 | 44 | 12.0% |
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