Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 33°F | 54°F | 43°F | 4.1" |
February | 35°F | 57°F | 45°F | 4.0" |
March | 43°F | 67°F | 54°F | 4.2" |
April | 51°F | 75°F | 63°F | 4.1" |
May | 59°F | 82°F | 70°F | 3.8" |
June | 67°F | 90°F | 78°F | 3.6" |
July | 70°F | 91°F | 79°F | 3.9" |
August | 70°F | 90°F | 79°F | 4.7" |
September | 64°F | 84°F | 73°F | 4.6" |
October | 51°F | 75°F | 62°F | 3.4" |
November | 40°F | 65°F | 52°F | 3.5" |
December | 38°F | 58°F | 47°F | 5.1" |
Index | Roswell | Georgia | National |
Air quality index | 52 | 41 | 42 |
Pollution index | 19,982,200 | 1,874,972 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 162 |
Days with moderate air quality | 184 |
Days w/ poor A.Q. for sensitive groups | 18 |
Days with unhealthy air quality | 1 |
Pollutant | Total |
Arsenic | 0.210% |
Benzene | 0.260% |
Carbon Tetrachloride | 0.050% |
Lead | 0.100% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Cumming, GA | 6,528 | 37 | 26.0% |
Holly Springs, GA | 13,682 | 52 | 4.0% |
Doraville, GA | 10,244 | 52 | 4.0% |
Smyrna, GA | 56,333 | 52 | 4.0% |
Johns Creek, GA | 84,551 | 52 | 4.0% |
Roswell, GA | 94,884 | 52 | 4.0% |
City | Population | Air Quality Index | National Avg. |
South Gate, CA | 94,905 | 72 | 44.0% |
Portsmouth, VA | 94,961 | 40 | 20.0% |
North Vancouver, BC | 94,662 | n/a | |
Sunrise, FL | 94,657 | 41 | 18.0% |
Hesperia, CA | 95,163 | 89 | 78.0% |
Roswell, GA | 94,884 | 52 | 4.0% |