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Today | Weather | Wednesday, September 3, 2025

Weather in Knoxville, Tennessee

01:55 AM
Now
Cloudy WeatherCloudy weather, overcast skies with no rain.
64° F
Feels Like 64°
Precipitation 40 %
Wind 4 mph
Humidity 88 %
Today
Sunny with a Chance of ThunderstormsSunny weather with a possibility of isolated thunderstorms developing later in the day.
Day 79°
Night 61°
Precipitation 55 %
Wind 7 mph
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.

Knoxville Weather Forecast Updated

Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 3, 2024)

Cloudy NightCloudy night, overcast skies at night with no rain.

Day

86°

Night

64°

Wind

4 mph

Precipitation

0

Air quality in Knoxville

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

Pollutant Concentrations:

PM2.5 14.59 µg/m³
PM10 15.58 µg/m³
O₃ 24.54 ppb
NO₂ 11.05 ppb
SO₂ 0.86 ppb
CO 298.12 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.

View Hourly Air Quality Forecast