National Weather Service Forecast for: San Mateo CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 2:30 pm PST Dec 23, 2025
 
Tonight

Tonight: Showers, with thunderstorms also possible after 1am. Low around 52. Breezy, with a southeast wind 14 to 19 mph increasing to 23 to 28 mph after midnight. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Showers and
Breezy
 Wednesday

Wednesday: Showers. High near 61. South southeast wind 8 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Showers

 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 52. Breezy, with a south wind around 24 mph, with gusts as high as 43 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Severe
T-Storms
and Breezy
 Christmas
Day
Christmas Day: Showers and possibly a thunderstorm before 7am, then showers between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 58. Breezy, with a south wind 20 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Showers and
Breezy
 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm. Low around 49. Breezy, with a south southwest wind 15 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Showers and
Breezy
 Friday

Friday: Showers. High near 57. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Showers

 Friday
Night
Friday Night: Showers and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms after 10pm. Low around 45. Chance of precipitation is 80%.
Showers then
Chance
Showers
 Saturday

Saturday: A chance of showers, mainly before 10am. Mostly sunny, with a high near 57.
Chance
Showers
 Saturday
Night
Saturday Night: Mostly clear, with a low around 41.
Mostly Clear
Lo 52 °F Hi 61 °F Lo 52 °F Hi 58 °F Lo 49 °F Hi 57 °F Lo 45 °F Hi 57 °F Lo 41 °F

Flood Watch
Wind Advisory
 

Tonight
 
 Showers, with thunderstorms also possible after 1am. Low around 52. Breezy, with a southeast wind 14 to 19 mph increasing to 23 to 28 mph after midnight. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
 
 Showers. High near 61. South southeast wind 8 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
 
 Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 52. Breezy, with a south wind around 24 mph, with gusts as high as 43 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Christmas Day
 
 Showers and possibly a thunderstorm before 7am, then showers between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 58. Breezy, with a south wind 20 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
 
 Showers and possibly a thunderstorm. Low around 49. Breezy, with a south southwest wind 15 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday
 
 Showers. High near 57. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
 
 Showers and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms after 10pm. Low around 45. Chance of precipitation is 80%.
Saturday
 
 A chance of showers, mainly before 10am. Mostly sunny, with a high near 57.
Saturday Night
 
 Mostly clear, with a low around 41.
Sunday
 
 Sunny, with a high near 56.
Sunday Night
 
 Mostly clear, with a low around 40.
Monday
 
 Sunny, with a high near 57.
Monday Night
 
 Mostly clear, with a low around 42.
Tuesday
 
 Sunny, with a high near 59.

 

Forecast from NOAA-NWS for San Mateo CA.