| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 49°F | 38°F | 3.9" |
| February | 30°F | 51°F | 39°F | 3.3" |
| March | 38°F | 61°F | 49°F | 4.0" |
| April | 48°F | 72°F | 59°F | 5.4" |
| May | 57°F | 79°F | 67°F | 7.3" |
| June | 66°F | 87°F | 75°F | 4.4" |
| July | 70°F | 91°F | 79°F | 6.3" |
| August | 68°F | 88°F | 77°F | 6.0" |
| September | 61°F | 82°F | 71°F | 4.8" |
| October | 50°F | 72°F | 60°F | 5.4" |
| November | 38°F | 61°F | 49°F | 3.9" |
| December | 33°F | 53°F | 42°F | 4.5" |
| Index | Falmouth | Virginia | National |
| Air quality index | 47 | 58 | 42 |
| Pollution index | 658,482 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 209 |
| Days with moderate air quality | 145 |
| Days w/ poor A.Q. for sensitive groups | 10 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.004% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Lake Wilderness, VA | 2,837 | 40 | 20.0% |
| Laurel Hill, VA | 8,771 | 40 | 20.0% |
| Long Branch, VA | 7,906 | 44 | 12.0% |
| Port Royal, VA | 151 | 44 | 12.0% |
| Spotsylvania Courthouse, VA | 5,027 | 44 | 12.0% |
| Falmouth, VA | 4,911 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Demarest, NJ | 4,911 | 51 | 2.0% |
| Northvale, NJ | 4,911 | 51 | 2.0% |
| Pascoag, RI | 4,911 | 44 | 12.0% |
| Eagar, AZ | 4,910 | 44 | 12.0% |
| Silver Springs, NV | 4,910 | 39 | 22.0% |
| Falmouth, VA | 4,911 | 47 | 6.0% |
Here are the best places to live in Virginia
See the best places to live in Falmouth
Check out the 10 safest cities in Virginia
These are the 10 cheapest cities in Virginia