Today | Weather | Tuesday, October 21, 2025

Weather in Chattanooga, Tennessee

10:10 PM
Now
Night
57° F
Feels Like 55°
Precipitation 0 %
Wind 6 mph
Humidity 83 %
Today
Night
Day 73°
Night 45°
Precipitation 0 %
Wind 6 mph

Chattanooga Weather Forecast Updated

33 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (October 21, 2024)

Night

Day

75°

Night

46°

Wind

2 mph

Precipitation

2

Air Quality in Chattanooga

NOW
35 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.67 µg/m³
PM10 6.99 µg/m³
O3 0.038 ppm
NO2 1.9 ppb
SO2 0.4 ppb
CO 0.12 ppm
NH3 3.65 µg/m³
NO 0 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)
PM2.55.67 µg/m³
PM106.99 µg/m³
O374.4 µg/m³
NO23.6 µg/m³
SO20.93 µg/m³
CO136.25 µg/m³
NH33.65 µg/m³
NO0 µg/m³