Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 24°F | 46°F | 34°F | 2.7" |
February | 25°F | 48°F | 36°F | 2.1" |
March | 33°F | 58°F | 45°F | 3.2" |
April | 43°F | 71°F | 56°F | 3.7" |
May | 52°F | 78°F | 65°F | 5.6" |
June | 61°F | 86°F | 74°F | 4.5" |
July | 66°F | 90°F | 78°F | 4.2" |
August | 65°F | 88°F | 76°F | 2.8" |
September | 58°F | 82°F | 69°F | 3.5" |
October | 46°F | 71°F | 58°F | 5.4" |
November | 35°F | 59°F | 46°F | 2.6" |
December | 29°F | 50°F | 39°F | 3.8" |
Index | Countryside | Virginia | National |
Air quality index | 47 | 58 | 42 |
Pollution index | 380,124 | 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 | 0.003% |
Benzene | 0.005% |
Carbon Tetrachloride | 0.001% |
Lead | 0.001% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Bull Run Mountain Estates, VA | 1,777 | 38 | 24.0% |
Woodburn, VA | 10,081 | 38 | 24.0% |
Hamilton, VA | 708 | 38 | 24.0% |
Fairfax, VA | 23,312 | 47 | 6.0% |
Greenbriar, VA | 7,976 | 47 | 6.0% |
Countryside, VA | 9,517 | 47 | 6.0% |
City | Population | Air Quality Index | National Avg. |
Cross Lanes, WV | 9,517 | 40 | 20.0% |
La Plata, MD | 9,516 | 47 | 6.0% |
Midland, WA | 9,518 | 30 | 40.0% |
Cedar Hills, OR | 9,514 | 38 | 24.0% |
Independent Hill, VA | 9,514 | 47 | 6.0% |
Countryside, VA | 9,517 | 47 | 6.0% |