UV Index in Sunnyvale
About UV Exposure in Sunnyvale
Check the live UV index in Sunnyvale, United States before you head outside. This page shows the current UV level, how UV rises and falls through the day, the 7-day outlook and the sun protection the World Health Organization recommends at each level. UV in Sunnyvale peaks around solar noon and is stronger in summer, at altitude and under clear skies, so a quick look at today's curve helps you plan outdoor time safely.
Frequently Asked Questions
What is the UV index in Sunnyvale today?
The current UV index in Sunnyvale is shown at the top of this page and refreshes each time you open it, together with the WHO protection advice for that level.
When is UV strongest in Sunnyvale?
UV radiation in Sunnyvale is normally strongest between 11:00 and 15:00 local time. The hourly chart on this page shows exactly when today's peak falls.
How can I protect myself from UV in Sunnyvale?
From UV 3 upwards, use SPF 30+ sunscreen, a hat and sunglasses, and seek shade around midday. Apply sunscreen 20 minutes before going out and reapply every two hours.
Can the UV index in Sunnyvale be high when it is cloudy or cold?
Yes. Up to 80% of UV passes through light cloud, and cool air does not reduce UV. Snow, water and sand also reflect UV and increase your exposure.