Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 28°F | 47°F | 37°F | 2.7" |
February | 29°F | 50°F | 38°F | 2.3" |
March | 37°F | 60°F | 47°F | 3.2" |
April | 47°F | 71°F | 58°F | 3.4" |
May | 56°F | 78°F | 67°F | 4.6" |
June | 67°F | 87°F | 77°F | 5.3" |
July | 72°F | 91°F | 81°F | 4.2" |
August | 70°F | 90°F | 79°F | 3.2" |
September | 63°F | 83°F | 72°F | 3.5" |
October | 52°F | 72°F | 61°F | 5.0" |
November | 40°F | 61°F | 50°F | 2.5" |
December | 33°F | 52°F | 42°F | 3.8" |
Index | Idylwood | Virginia | National |
Air quality index | 47 | 58 | 42 |
Pollution index | 208,434 | 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 | 0.002% |
Carbon Tetrachloride | 0.001% |
Lead | 0.001% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Riverdale Park, MD | 7,216 | 47 | 6.0% |
Aspen Hill, MD | 53,869 | 47 | 6.0% |
Fairland, MD | 25,649 | 47 | 6.0% |
Layhill, MD | 5,112 | 47 | 6.0% |
North Potomac, MD | 24,146 | 47 | 6.0% |
Idylwood, VA | 18,099 | 47 | 6.0% |
City | Population | Air Quality Index | National Avg. |
Manchester, MO | 18,102 | 54 | 8.0% |
North Aurora, IL | 18,089 | 55 | 10.0% |
Hurricane, UT | 18,112 | 44 | 12.0% |
Upper Grand Lagoon, FL | 18,114 | 38 | 24.0% |
North Grenville, ON | 18,083 | n/a | |
Idylwood, VA | 18,099 | 47 | 6.0% |