UV Index Today
UV Index in Mountain View, California Today
Live UV index and hourly forecast for Mountain View. Check the current level before you head out, see when the sun peaks today, and know exactly what protection you need.
Hourly UV forecast
Times shown in Mountain View local time (PDT). Data from currentuvindex.com, updated hourly.
What the UV index means in Mountain View
The UV index is a simple 0 to 11+ scale for the strength of the sun's ultraviolet radiation. The higher the number, the faster unprotected skin can burn. In Mountain View, like everywhere, the reading rises and falls through the day and shifts with the seasons, cloud cover, and how high the sun sits in the sky.
Use the live reading at the top of this page to decide what you need right now. As a rule of thumb: at UV 3 or above, wear sunscreen and a hat; at UV 6 and above, add shade during the middle of the day; at UV 8 and above, treat midday sun with real caution.
Sun-safety tips for Mountain View
- Check the current UV index above before spending time outdoors.
- Apply broad-spectrum SPF 30+ sunscreen 15 minutes before going out, and reapply every two hours.
- Seek shade between 10 a.m. and 4 p.m., when UV is strongest.
- Wear a wide-brim hat and UV-blocking sunglasses.
- Remember that UV passes through light cloud and reflects off water, sand, and snow.
UV index in nearby cities
Learn more about UV
Mountain View UV index FAQ
What is the UV index in Mountain View today?
It changes through the day, from near zero at sunrise to a peak in the early afternoon. The live reading and hourly forecast above show today's values for Mountain View.
When is UV highest in Mountain View?
Usually between 10 a.m. and 4 p.m., peaking around midday. The forecast bars above mark today's peak hour.
Do I need sunscreen in Mountain View?
Once UV hits 3 or higher, yes. Use SPF 30+ on exposed skin, add a hat and sunglasses, and limit midday sun on high-UV days.