Today | Weather | Tuesday, October 21, 2025

Weather in Chattanooga, Tennessee

10:10 PM

Now

57° F

Feels Like 55°

Precipitation 0 %

Wind 6 mph

Humidity 83 %

Today

Day 73°

Night 45°

Precipitation 0 %

Wind 6 mph

Chattanooga Weather Forecast Updated

33 minutes ago

Last updated on October 21, 2025 9:36 PM

Weather Forecast History

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

Day

75°

Night

46°

Wind

2 mph

Precipitation

Air Quality in Chattanooga

NOW

35 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 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

PM_2.5 – 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)

PM_2.5 – 5.67 µg/m³

PM₁₀ – 6.99 µg/m³

O₃ – 74.4 µg/m³

NO₂ – 3.6 µg/m³

SO₂ – 0.93 µg/m³

CO – 136.25 µg/m³

NH₃ – 3.65 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast