Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 28°F | 46°F | 36°F | 2.6" |
February | 29°F | 49°F | 38°F | 2.2" |
March | 37°F | 58°F | 46°F | 3.4" |
April | 47°F | 70°F | 57°F | 3.8" |
May | 57°F | 76°F | 66°F | 4.4" |
June | 66°F | 85°F | 75°F | 4.8" |
July | 71°F | 89°F | 79°F | 3.5" |
August | 69°F | 87°F | 77°F | 3.1" |
September | 62°F | 81°F | 71°F | 4.2" |
October | 50°F | 70°F | 59°F | 4.3" |
November | 39°F | 59°F | 48°F | 2.8" |
December | 32°F | 50°F | 40°F | 3.4" |
Index | Montclair | Virginia | National |
Air quality index | 47 | 58 | 42 |
Pollution index | 520,936 | 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 | 0.020% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.002% |
Lead | 0.050% |
Mercury | 0.001% |
City | Population | Air Quality Index | National Avg. |
Manassas Park, VA | 17,548 | 47 | 6.0% |
Bull Run, VA | 16,769 | 47 | 6.0% |
Huntington, VA | 13,526 | 47 | 6.0% |
Potomac Heights, MD | 1,247 | 47 | 6.0% |
County Center, VA | 4,104 | 47 | 6.0% |
Montclair, VA | 21,329 | 47 | 6.0% |
City | Population | Air Quality Index | National Avg. |
La Porte, IN | 21,328 | 37 | 26.0% |
Mountlake Terrace, WA | 21,328 | 45 | 10.0% |
Cartersville, GA | 21,331 | 44 | 12.0% |
Selden, NY | 21,338 | 43 | 14.0% |
Bellview, FL | 21,314 | 41 | 18.0% |
Montclair, VA | 21,329 | 47 | 6.0% |