Sunnyvale, California Weather:
Thursday, May 21, 2026
Cloudy Weather
Day 72°
Night 54°
Precipitation 2 %
Wind 6 mph
Weather Forecast History
Last Year's Weather on This Day (May 21, 2025)
Sunny Weather

Day

82°

Night

52°

Wind

9 mph

UV Index

11

Precipitation

1 %