Today | Weather | Wednesday, May 20, 2026

Weather in Roswell, Georgia

05:53 PM
Now
Stormy Weather
90° F
Feels Like 90°
Precipitation 52 %
Wind 7 mph
UV Index (0 - 11+) 0
Humidity 55 %
Today
Sunny with a Chance of Thunderstorms
Day 91°
Night 64°
Precipitation 60 %
Wind 5 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Roswell Weather Forecast Updated

Last updated on

Air Quality in Roswell

NOW
36 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.43 µg/m³
PM10 4.01 µg/m³
O3 0.039 ppm
NO2 0.7 ppb
SO2 0.1 ppb
CO 0.10 ppm
NH3 1.42 µg/m³
NO 0.13 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)
PM2.52.43 µg/m³
PM104.01 µg/m³
O377 µg/m³
NO21.24 µg/m³
SO20.14 µg/m³
CO112.05 µg/m³
NH31.42 µg/m³
NO0.13 µg/m³