Today | Weather | Tuesday, June 30, 2026

Active Weather Warnings

Heat Advisory

Weather in Knoxville, Tennessee

12:05 AM

Now

81° F

Feels Like 90°

Precipitation 0 %

Wind 4 mph

Humidity 80 %

Today

Day 95°

Night 75°

Precipitation 25 %

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

34 minutes ago

Last updated on June 29, 2026 at 11:31 PM

Weather Forecast History

Last Year's Weather on This Day (June 30, 2025)

Day

91°

Night

72°

Wind

6 mph

UV Index

Precipitation

40 %

Air Quality in Knoxville

NOW

18 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 4.31 µg/m³

PM₁₀ 11.85 µg/m³

O₃ 0.005 ppm

NO₂ 1.6 ppb

SO₂ 0 ppb

CO 0.09 ppm

NH₃ 9.46 µg/m³

NO 0.03 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 – 4.31 µg/m³

PM₁₀ – 11.85 µg/m³

O₃ – 9.71 µg/m³

NO₂ – 3.1 µg/m³

SO₂ – 0.03 µg/m³

CO – 108.02 µg/m³

NH₃ – 9.46 µg/m³

NO – 0.03 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Knoxville

Moderate Expected Likely

Heat Advisory

Heat Advisory issued June 29 at 1:34PM EDT until July 2 at 9:00PM EDT by NWS Morristown TN

Jun 30, 11:00 AM → Jul 2, 9:00 PM

WHAT: Afternoon heat index values will approach or exceed 100 at
times over all but the higher elevations, and some valley
locations may see heat index values exceed 105.

WHERE: Portions of southwest North Carolina, east Tennessee, and
southwest Virginia.

WHEN: From 11 AM EDT /10 AM CDT/ Tuesday to 9 PM EDT /8 PM CDT/
Thursday.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.

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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Updated: Jun 29, 11:31 PM Source: NWS Alert