Today | Weather | Monday, September 21, 2026

Weather in Roswell, Georgia

01:55 PM
Now
Cloudy Weather
88° F
Feels Like 100°
Precipitation 49 %
Wind 4 mph
UV Index (0 - 11+) 6
Humidity 52 %
Today
Sunny with a Chance of Thunderstorms
Day 90°
Night 66°
Precipitation 80 %
Wind 2 mph
UV Index (0 - 11+) 7

Roswell Weather Forecast Updated

6 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Rainy Night

Day

86°

Night

64°

Wind

5 mph

Precipitation

86 %

Air Quality in Roswell

NOW
46 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.53 µg/m³
PM10 3.93 µg/m³
O3 0.049 ppm
NO2 0.3 ppb
SO2 0.3 ppb
CO 0.12 ppm
NH3 0.32 µg/m³
NO 0.08 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.53.53 µg/m³
PM103.93 µg/m³
O397.02 µg/m³
NO20.52 µg/m³
SO20.89 µg/m³
CO132.3 µg/m³
NH30.32 µg/m³
NO0.08 µg/m³