National Weather Service Forecast for: Sunnyvale CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 2:54 pm PST Dec 22, 2025
 
This
Afternoon
This Afternoon: A 50 percent chance of rain. Mostly cloudy, with a high near 61. South southeast wind around 6 mph.
Chance Rain

 Tonight

Tonight: A 40 percent chance of rain. Cloudy, with a low around 53. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain

 Tuesday

Tuesday: Rain likely, mainly after 10am. Cloudy, with a high near 61. South southeast wind 9 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely

 Tuesday
Night
Tuesday Night: Rain. Low around 50. Breezy, with a southeast wind 18 to 23 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Rain and
Breezy
 Wednesday

Wednesday: Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe. High near 59. South southeast wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Rain then
Severe
T-Storms
 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 4am, then showers and possibly a thunderstorm after 4am. Some of the storms could be severe. Low around 52. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Severe
T-Storms
then Showers
 Christmas
Day
Christmas Day: Showers and possibly a thunderstorm before 7am, then rain between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 55. Chance of precipitation is 100%.
Showers

 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm. Cloudy, with a low around 46.
Showers

 Friday

Friday: Rain. Cloudy, with a high near 54.
Rain
Hi 61 °F Lo 53 °F Hi 61 °F Lo 50 °F Hi 59 °F Lo 52 °F Hi 55 °F Lo 46 °F Hi 54 °F

High Wind Watch
Flood Watch
 

This Afternoon
 
 A 50 percent chance of rain. Mostly cloudy, with a high near 61. South southeast wind around 6 mph.
Tonight
 
 A 40 percent chance of rain. Cloudy, with a low around 53. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
 
 Rain likely, mainly after 10am. Cloudy, with a high near 61. South southeast wind 9 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
 Rain. Low around 50. Breezy, with a southeast wind 18 to 23 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday
 
 Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe. High near 59. South southeast wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
 Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 4am, then showers and possibly a thunderstorm after 4am. Some of the storms could be severe. Low around 52. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Christmas Day
 
 Showers and possibly a thunderstorm before 7am, then rain between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 55. Chance of precipitation is 100%.
Thursday Night
 
 Showers and possibly a thunderstorm. Cloudy, with a low around 46.
Friday
 
 Rain. Cloudy, with a high near 54.
Friday Night
 
 Rain likely, mainly before 10pm. Mostly cloudy, with a low around 42.
Saturday
 
 Mostly sunny, with a high near 54.
Saturday Night
 
 Mostly clear, with a low around 38.
Sunday
 
 Sunny, with a high near 55.
Sunday Night
 
 Mostly clear, with a low around 39.
Monday
 
 Sunny, with a high near 57.

 

Forecast from NOAA-NWS for Sunnyvale CA.