Today | Weather | Wednesday, May 21, 2025
Sunnyvale, California. 09:58 PM
Now
NightNighttime, with dark skies and stars or a moon visible.
63° F
Feels Like 61°
Precipitation 0 %
Wind 6 mph
Humidity 55 %
Today
Sunny WeatherSunny weather, clear skies and sunny weather.
Day 82°
Night 52°
Precipitation 1 %
Wind 9 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Other:

Plenty of bright sunlight; breezy this afternoon.

Sunnyvale Weather Forecast Updated

Weather Forecast History

Last Year's Weather on This Day (May 21, 2024)

Day

77°

Night

52°