Today | Weather | Tuesday, September 15, 2026

Weather in Chattanooga, Tennessee

01:27 AM
Now
Night
75° F
Feels Like 81°
Precipitation 0 %
Wind 5 mph
Humidity 85 %
Today
Cloudy Weather
Day 97°
Night 72°
Precipitation 25 %
Wind 7 mph
UV Index (0 - 11+) 7

Chattanooga Weather Forecast Updated

30 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 15, 2025)
Cloudy Night

Day

88°

Night

64°

Wind

2 mph

Precipitation

8 %

Air Quality in Chattanooga

NOW
25 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 5.91 µg/m³
PM10 11.35 µg/m³
O3 0.017 ppm
NO2 2.9 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 9.07 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)
PM2.55.91 µg/m³
PM1011.35 µg/m³
O333.97 µg/m³
NO25.48 µg/m³
SO20.42 µg/m³
CO142.38 µg/m³
NH39.07 µg/m³
NO0 µg/m³