What is the UV index in Chicago, Illinois, USA today?

Check the live UV index in Chicago, Illinois, USA today on Daily UV Tracker. See peak UV level, safe sun time, hourly UV forecast and 7-day forecast with SPF sun protection advice. Data is updated continuously from Open-Meteo and OpenUV.

What is the UV index in Chicago, Illinois, USA?

The UV index in Chicago, Illinois, USA varies by season and time of day. Use Daily UV Tracker to see the current UV level, peak UV time, and hourly forecast so you can plan safe sun exposure.

When is UV highest in Chicago, Illinois, USA?

UV is usually highest in Chicago, Illinois, USA around solar noon, between 11 am and 3 pm local time. The daily peak depends on latitude, season, altitude and cloud cover.

How long can I stay in the sun in Chicago, Illinois, USA?

Safe sun time in Chicago, Illinois, USA depends on the current UV index and your skin type. Use the burn-time calculator on the page to get a personalised estimate based on the Fitzpatrick scale.

Chicago, Illinois今日紫外线指数、峰值UV与7天预报

Q: Do I need sunscreen in Chicago, Illinois, USA?

Yes, on most days. Whenever the UV index in Chicago, Illinois, USA reaches 3 or above, use broad-spectrum SPF 30–50 sunscreen, reapply every two hours and after swimming, and cover up around solar noon.

Q: What SPF should I wear in Chicago, Illinois, USA?

SPF 30 is a sensible baseline in Chicago, Illinois, USA, and SPF 50+ when the UV index is 8 or higher. Add sunglasses, a wide-brim hat and UPF clothing during peak UV hours.

Q: Can you get sunburnt on a cloudy day in Chicago, Illinois, USA?

Yes. Up to 80% of UV radiation passes through light cloud, so you can still burn in Chicago, Illinois, USA on overcast days. Check the hourly UV forecast rather than judging by brightness.

Chicago, Illinois紫外线指数与预报 — 今日峰值UV、安全日晒时间、晒伤计算器、每小时UV预报、7天UV预报、SPF防晒建议。

Chicago, Illinois, USA is in USA (North America). UV levels change through the day and across seasons. The strongest UV usually occurs around solar noon, so seek shade, wear sunscreen and protective clothing during the middle of the day.

Sun safety in Chicago, Illinois, USA — your questions answered

What time is UV highest in Chicago, Illinois, USA?

UV in Chicago, Illinois, USA peaks around solar noon, usually between 11:00 and 15:00 local time. The hourly UV forecast on this page shows the exact peak UV hour for today.

Do I need sunscreen in Chicago, Illinois, USA?

Whenever the UV index reaches 3 or above, use broad-spectrum SPF 30–50 sunscreen, reapply every two hours and after swimming, and cover up during peak UV hours.

What SPF should I wear in Chicago, Illinois, USA?

SPF 30 is a sensible baseline in Chicago, Illinois, USA; move to SPF 50+ when the UV index is 8 or higher. Add sunglasses, a wide-brim hat and UPF clothing. The burn-time calculator gives a personalised safe sun time by Fitzpatrick skin type.

Can you get sunburnt on a cloudy day in Chicago, Illinois, USA?

Yes — up to 80% of UV passes through light cloud, so sunburn is still possible in Chicago, Illinois, USA on overcast days.

UV index levels explained: UV 1 · UV 3 · UV 5 · UV 7 · UV 9 · UV 11

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