Questions about San Francisco today

What is the UV index in San Francisco right now?

The UV index in San Francisco, California is 4.3 — categorised as Moderate. A hat and SPF 30 are enough for most people.

Is it safe to go outside in San Francisco today?

Yes — UV is moderate (4.3) in San Francisco right now. A hat and SPF 30 are enough for most people.

How long does it take to get sunburn in San Francisco?

Average unprotected skin starts to burn in roughly 46 min at the current UV index of 4.3 in San Francisco. SPF 30 multiplies that window by about 30×. Lighter skin burns faster; darker skin burns more slowly.

What does the heat feel like in San Francisco today?

Air temperature is 17°C with 56% humidity, giving a "feels like" reading of 17°C — comfortable.

When is the safest time to step outside in San Francisco?

UV is highest between 11 am and 4 pm. Early mornings (before 9 am) and late afternoons (after 5 pm) are the safest windows for unprotected skin in San Francisco, especially through summer.