National Weather Service Forecast for: Sunnyvale CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 11:26 am PDT May 26, 2026
 
This
Afternoon
This Afternoon: Mostly sunny, with a high near 67. West northwest wind around 16 mph, with gusts as high as 26 mph.
Mostly Sunny

 Tonight

Tonight: Partly cloudy, with a low around 51. West northwest wind 11 to 16 mph becoming light west after midnight. Winds could gust as high as 28 mph.
Partly Cloudy

 Wednesday

Wednesday: Mostly sunny, with a high near 71. Calm wind becoming west northwest 5 to 8 mph in the afternoon.
Mostly Sunny

 Wednesday
Night
Wednesday Night: A 20 percent chance of rain after 4am. Mostly cloudy, with a low around 51. West northwest wind 5 to 7 mph becoming light and variable in the evening.
Partly Cloudy
then Slight
Chance Rain
 Thursday

Thursday: A 40 percent chance of rain. Partly sunny, with a high near 71. South southeast wind around 5 mph becoming light and variable. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 52.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 71.
Mostly Sunny

 Friday
Night
Friday Night: Partly cloudy, with a low around 52.
Partly Cloudy

 Saturday

Saturday: Mostly sunny, with a high near 72.
Mostly Sunny
Hi 67 °F Lo 51 °F Hi 71 °F Lo 51 °F Hi 71 °F Lo 52 °F Hi 71 °F Lo 52 °F Hi 72 °F

 

This Afternoon
 
 Mostly sunny, with a high near 67. West northwest wind around 16 mph, with gusts as high as 26 mph.
Tonight
 
 Partly cloudy, with a low around 51. West northwest wind 11 to 16 mph becoming light west after midnight. Winds could gust as high as 28 mph.
Wednesday
 
 Mostly sunny, with a high near 71. Calm wind becoming west northwest 5 to 8 mph in the afternoon.
Wednesday Night
 
 A 20 percent chance of rain after 4am. Mostly cloudy, with a low around 51. West northwest wind 5 to 7 mph becoming light and variable in the evening.
Thursday
 
 A 40 percent chance of rain. Partly sunny, with a high near 71. South southeast wind around 5 mph becoming light and variable. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
 
 Partly cloudy, with a low around 52.
Friday
 
 Mostly sunny, with a high near 71.
Friday Night
 
 Partly cloudy, with a low around 52.
Saturday
 
 Mostly sunny, with a high near 72.
Saturday Night
 
 Mostly clear, with a low around 49.
Sunday
 
 Sunny, with a high near 78.
Sunday Night
 
 Clear, with a low around 52.
Monday
 
 Sunny, with a high near 80.

 

Forecast from NOAA-NWS for Sunnyvale CA.