Today | Weather | Tuesday, May 12, 2026

Weather in Knoxville, Tennessee

03:01 PM
Now
Cloudy Weather
77° F
Feels Like 88°
Precipitation 0 %
Wind 4 mph
UV Index (0 - 11+) 7
Humidity 27 %
Today
Sunny Weather
Day 79°
Night 54°
Precipitation 2 %
Wind 4 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

18 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 12, 2025)
Rainy Weather

Day

72°

Night

61°

Wind

4 mph

UV Index

3

Precipitation

100 %

Air Quality in Knoxville

NOW
32 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.96 µg/m³
PM10 7.21 µg/m³
O3 0.035 ppm
NO2 0.6 ppb
SO2 0.3 ppb
CO 0.11 ppm
NH3 5.3 µg/m³
NO 0.22 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)
PM2.54.96 µg/m³
PM107.21 µg/m³
O368.08 µg/m³
NO21.19 µg/m³
SO20.7 µg/m³
CO127.13 µg/m³
NH35.3 µg/m³
NO0.22 µg/m³