Today | Weather | Monday, September 21, 2026

Weather in Johns Creek, Georgia

01:56 PM
Now
Cloudy Weather
90° F
Feels Like 100°
Precipitation 43 %
Wind 4 mph
UV Index (0 - 11+) 6
Humidity 49 %
Today
Sunny with a Chance of Thunderstorms
Day 90°
Night 66°
Precipitation 55 %
Wind 2 mph
UV Index (0 - 11+) 7

Johns Creek Weather Forecast Updated

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

Day

86°

Night

63°

Wind

6 mph

UV Index

70

Precipitation

25 %

Air Quality in Johns Creek

NOW
47 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.97 µg/m³
PM10 4.37 µg/m³
O3 0.051 ppm
NO2 0.3 ppb
SO2 0.6 ppb
CO 0.12 ppm
NH3 0.16 µg/m³
NO 0.09 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)
PM2.53.97 µg/m³
PM104.37 µg/m³
O399.4 µg/m³
NO20.6 µg/m³
SO21.46 µg/m³
CO133.53 µg/m³
NH30.16 µg/m³
NO0.09 µg/m³