Questions about San Francisco today

What is the UV index in San Francisco right now?

The UV index in San Francisco, Heredia Province is 0.5 — categorised as Low. You can step out without sun protection.

Is it safe to go outside in San Francisco today?

Yes — UV is low (0.5) in San Francisco right now. You can step out without sun protection.

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

Average unprotected skin starts to burn in roughly 6 hr 40 min at the current UV index of 0.5 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 22°C with 74% humidity, giving a "feels like" reading of 22°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.