What is the UV index in Knoxville right now?

See the live UV index for Knoxville above — it updates every 15 minutes from Open-Meteo data. The UV index runs from 0 (low) to 11+ (extreme); protection is advised once it reaches 3 or higher.

What time is UV highest in Knoxville?

UV in Knoxville usually peaks between noon and 3 PM local time, when the sun is highest. Check the hour-by-hour chart above for today's exact peak time.

What SPF do I need in Knoxville today?

At UV 3–5 use SPF 30; at UV 6–7 use SPF 50; at UV 8 or above use SPF 50+ and reapply every 2 hours. The tool shows the exact SPF for the current UV level.

How long can I stay in the sun before burning?

It depends on your skin type and the UV level. At UV 8 (very high), fair skin can burn in 15–25 minutes. Use the sunburn-time calculator above for a personalised estimate.

Does UV protective clothing actually work?

Yes. A UPF 50 garment blocks 98% of UV radiation — more reliably than most sunscreens. It's the most dependable protection for long periods outdoors.

UV Index in Knoxville Today — Check Current UV Levels in Knoxville, Tennessee

Current UV Index in Knoxville

0.3 Low

Low risk. Enjoy being outdoors.

Updated at 3:30 AM local time · Data from Open-Meteo

Check the real-time UV index in Knoxville right now. Get the current UV level, hourly UV forecast for today, and a 7-day UV outlook for Knoxville, Tennessee.

Current UV Index in Knoxville

The UV index in Knoxville changes throughout the day, typically peaking between 10am and 2pm local time. Great Smoky Mountains gateway with varying UV by elevation

Hourly UV Forecast for Knoxville Today

Planning outdoor activities in Knoxville, Tennessee? Check our hourly UV breakdown to find the safest windows. Our forecast updates every 15 minutes with data from Open-Meteo weather services.

7-Day UV Forecast for Knoxville

Plan your week in Knoxville with our 7-day UV index forecast. See which days will have the highest UV so you can prepare with the right level of sun protection.

Sun Protection Guide for Knoxville

UV Index	Level	What to Do in Knoxville
0–2	Low	Enjoy outdoor activities freely. Sunscreen optional for most skin types.
3–5	Moderate	Wear SPF 30+ sunscreen. Seek shade during midday hours.
6–7	High	Limit midday sun. Use SPF 50+, wear a hat and sunglasses.
8–10	Very High	Minimize outdoor time 10am–4pm. Full sun protection essential.
11+	Extreme	Avoid direct sun. Stay indoors or in full shade during peak hours.

Typical UV Levels in Knoxville

Knoxville typically experiences UV index values of 9-10 during peak season (May-September) and 2-3 during the off-season. UV follows a clear seasonal curve peaking in midsummer

Best Time for Outdoor Activities in Knoxville

The safest time for outdoor activities in Knoxville is before 10am and after 4pm when UV levels drop significantly. Always check the current UV index before extended outdoor plans.

Recommended SPF for Knoxville

During peak UV season in Knoxville (May-September), dermatologists recommend SPF 50+ broad-spectrum sunscreen. Apply 15–20 minutes before sun exposure and reapply every 2 hours.

Knoxville UV Index by Season

High UV Season in Knoxville

UV levels in Knoxville are highest from late spring through early fall, with the UV index regularly reaching 9-10. Protective clothing, wide-brim hats, and UV-blocking sunglasses are recommended alongside sunscreen.

Low UV Season in Knoxville

UV levels drop during the mild winter months, typically measuring 2-3. SPF 30 is still recommended for extended outdoor time even during cooler months.

Recommended Sun Protection

EltaMD UV Clear SPF 46 — Face sunscreen. $37
Neutrogena Ultra Sheer SPF 70 — Body sunscreen. $10
Banana Boat Light As Air SPF 50 — Twin pack. $15
Roadbox UPF 50+ Sun Shirt — UV clothing. $19
Outdoor Research Sombriolet Hat — UPF 50+ hat. $45

We may earn a commission from purchases through these links.

Sun Safety FAQ for Knoxville

What is the average UV index in Knoxville?

The average UV index in Knoxville ranges from 2-3 during the low season to 9-10 during peak months (May-September).

When is UV highest in Knoxville?

UV is highest in Knoxville from late spring through early fall, peaking between 10am and 2pm local time.

Do I need sunscreen in Knoxville?

Yes — whenever the UV index reaches 3 or higher. During peak season (May-September), daily sunscreen use is strongly advised.

UV Index Near Knoxville

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About UV Index in Knoxville

UV data for Knoxville, Tennessee is updated every 15 minutes via Open-Meteo weather services. Always check the current UV index before spending extended time outdoors.

Disclaimer: UV index data and sun protection recommendations for Knoxville are approximate and for informational purposes only — not medical advice.