Today | Weather | Thursday, September 11, 2025

Weather in Chattanooga, Tennessee

12:31 AM
Now
Night
66° F
Feels Like 66°
Precipitation 0 %
Wind 4 mph
Humidity 86 %
Today
Cloudy Weather
Day 88°
Night 63°
Precipitation 3 %
Wind 10
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Other:

Mostly bright and clear.

Chattanooga Weather Forecast Updated

55 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 11, 2024)

Cloudy Weather

Day

90°

Night

70°

Wind

4 mph

UV Index

6

Precipitation

0

Air quality in Chattanooga

NOW
60 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 23.08 µg/m³
PM10 25.78 µg/m³
O₃ 26.65 ppb
NO₂ 13.11 ppb
SO₂ 0.84 ppb
CO 330.53 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.