Today | Weather | Monday, September 21, 2026

Weather in Atlanta, Georgia

03:17 PM
Now
Cloudy Weather
90° F
Feels Like 100°
Precipitation 49 %
Wind 5 mph
UV Index (0 - 11+) 4
Humidity 57 %
Today
Sunny with a Chance of Thunderstorms
Day 91°
Night 68°
Precipitation 80 %
Wind 2 mph
UV Index (0 - 11+) 7

Atlanta Weather Forecast Updated

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

Day

86°

Night

66°

Wind

5 mph

Precipitation

14 %

Air Quality in Atlanta

NOW
47 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.61 µg/m³
PM10 3.98 µg/m³
O3 0.051 ppm
NO2 0.3 ppb
SO2 0.3 ppb
CO 0.12 ppm
NH3 0.19 µg/m³
NO 0.1 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)
PM2.53.61 µg/m³
PM103.98 µg/m³
O399.18 µg/m³
NO20.63 µg/m³
SO20.89 µg/m³
CO136.19 µg/m³
NH30.19 µg/m³
NO0.1 µg/m³