UV Index

Check UV index by location and understand ultraviolet exposure levels for sun protection and outdoor planning.

Common use cases

UV data becomes more useful when it answers what to do before you head outside.

Daily commute and errands — Check the peak UV window before walking, biking, or doing midday errands so you know whether basic sunscreen is enough or you need more coverage.
Outdoor exercise and events — For hiking, running, sports days, or beach trips, the hourly chart helps you decide whether to shift the schedule earlier or later.
Family and school planning — If children or older adults will stay outside for a long stretch, use the page to plan hats, shade breaks, and reapplication timing.

The peak value tells you how strong the risk gets, while the hourly chart shows when that risk builds and fades.

Today's peak — The peak UV value is the fastest way to judge the day's overall exposure level. Use it to decide the baseline level of sun protection.
Hourly UV chart — The chart matters when you can choose your time window. Even on strong-UV days, early morning and late afternoon can be meaningfully safer.
Level guide and actions — The action beside each level lists matching sun protection and exposure-time adjustments.

Different activities react to weather differently. Running cares about heat and UV, hiking about rain and wind, and coastal plans about tide too.

Weather

Rain, apparent temperature, and wind belong together

No rain does not always mean comfortable. High apparent temperature or strong wind can reduce activity quality, so the score compares these conditions by time slot.
Sun

UV changes the best time to go out

UV often peaks around midday. Running, family outings, and long walks may be better in the morning, evening, or lower-UV windows.
Coast

Surfing and fishing need more than weather

Coastal activities also depend on the tide station. Tide turns, wind, and rain together affect safety and comfort.

The same time slot can feel very different depending on the activity. Choose the activity first so the score matches the experience.

Running

Avoid heat, strong UV, and muggy windows

Running is highly affected by apparent temperature. Short runs tolerate ordinary conditions, but long runs need cooler, lower-UV, stable weather.
Hiking

Rain and wind matter more than pretty sunshine

Mountain weather changes quickly. Rain, wind, and cloud can affect safety. A high score does not replace trail status and official alerts.
Coast

Treat tide, wind, and swell conservatively

Fishing, surfing, and intertidal plans cannot rely only on sunny weather. If tide or wind is wrong, a land-based backup is often safer.