Weather Forecast for Castro Valley

National Weather Service Forecast for: Castro Valley CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 5:31 pm PST Feb 17, 2018
 
Tonight

Tonight: Mostly cloudy, with a low around 42. South wind 7 to 13 mph becoming west after midnight.
Mostly Cloudy

Sunday

Sunday: Mostly sunny, with a high near 58. Breezy, with a west northwest wind 16 to 23 mph, with gusts as high as 30 mph.
Partly Sunny
then Mostly
Sunny and
Breezy
Sunday
Night
Sunday Night: Partly cloudy, with a low around 36. West northwest wind 10 to 17 mph, with gusts as high as 23 mph.
Partly Cloudy

Washington's
Birthday
Washington's Birthday: Sunny, with a high near 53. North northwest wind 13 to 15 mph, with gusts as high as 20 mph.
Sunny

Monday
Night
Monday Night: Areas of frost after 10pm.  Otherwise, mostly clear, with a low around 30. North wind 7 to 11 mph.
Areas Frost

Tuesday

Tuesday: Areas of frost before 10am.  Otherwise, sunny, with a high near 55.
Areas Frost
then Sunny

Tuesday
Night
Tuesday Night: Patchy frost after 10pm.  Otherwise, partly cloudy, with a low around 32.
Patchy Frost

Wednesday

Wednesday: Patchy frost before 10am.  Otherwise, sunny, with a high near 59.
Patchy Frost
then Sunny

Wednesday
Night
Wednesday Night: Mostly clear, with a low around 35.
Mostly Clear

Lo 42 °F Hi 58 °F Lo 36 °F Hi 53 °F Lo 30 °F Hi 55 °F Lo 32 °F Hi 59 °F Lo 35 °F

Hazardous Weather Outlook
 

Tonight
 
Mostly cloudy, with a low around 42. South wind 7 to 13 mph becoming west after midnight.
Sunday
 
Mostly sunny, with a high near 58. Breezy, with a west northwest wind 16 to 23 mph, with gusts as high as 30 mph.
Sunday Night
 
Partly cloudy, with a low around 36. West northwest wind 10 to 17 mph, with gusts as high as 23 mph.
Washington's Birthday
 
Sunny, with a high near 53. North northwest wind 13 to 15 mph, with gusts as high as 20 mph.
Monday Night
 
Areas of frost after 10pm. Otherwise, mostly clear, with a low around 30. North wind 7 to 11 mph.
Tuesday
 
Areas of frost before 10am. Otherwise, sunny, with a high near 55.
Tuesday Night
 
Patchy frost after 10pm. Otherwise, partly cloudy, with a low around 32.
Wednesday
 
Patchy frost before 10am. Otherwise, sunny, with a high near 59.
Wednesday Night
 
Mostly clear, with a low around 35.
Thursday
 
Mostly sunny, with a high near 60.
Thursday Night
 
Partly cloudy, with a low around 38.
Friday
 
Mostly sunny, with a high near 63.
Friday Night
 
Partly cloudy, with a low around 40.
Saturday
 
Mostly sunny, with a high near 64.

 

Forecast from NOAA-NWS for Castro Valley CA.