What is the UV index in Boise right now?

See the live UV index for Boise 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 Boise?

UV in Boise 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 Boise 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 Boise Today — Check Current UV Levels in Boise, Idaho

Current UV Index in Boise

0 None

No UV radiation. No protection needed.

Updated at 11:15 PM local time · Data from Open-Meteo

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

Current UV Index in Boise

The UV index in Boise changes throughout the day, typically peaking between 10am and 2pm local time. Treasure Valley at 2,700 feet with clear summer skies

Hourly UV Forecast for Boise Today

Planning outdoor activities in Boise, Idaho? 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 Boise

Plan your week in Boise 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 Boise

UV Index	Level	What to Do in Boise
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 Boise

Boise typically experiences UV index values of 9-10 during peak season (June-August) and 1-3 during the off-season. Sharp seasonal contrast — summer UV can be surprisingly strong while winter UV is minimal The elevated altitude increases UV intensity compared to sea-level locations.

Best Time for Outdoor Activities in Boise

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

Recommended SPF for Boise

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

Boise UV Index by Season

High UV Season in Boise

UV levels in Boise are highest during summer when days are longest, 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 Boise

UV levels drop in winter when the sun sits low, typically measuring 1-3. 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 Boise

What is the average UV index in Boise?

The average UV index in Boise ranges from 1-3 during the low season to 9-10 during peak months (June-August).

When is UV highest in Boise?

UV is highest in Boise during summer when days are longest, peaking between 10am and 2pm local time.

Do I need sunscreen in Boise?

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

UV Index Near Boise

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About UV Index in Boise

UV data for Boise, Idaho 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 Boise are approximate and for informational purposes only — not medical advice.