National Weather Service Forecast for: San Mateo CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 2:54 pm PST Dec 22, 2025
 
Tonight

Tonight: A 50 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, mainly after 10am. High near 62. South southeast wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain

 Tuesday
Night
Tuesday Night: Rain. Low around 50. Breezy, with a south wind 20 to 24 mph, with gusts as high as 47 mph. Chance of precipitation is 80%. 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. High near 61. South wind 8 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers

 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 1am, then showers and possibly a thunderstorm after 1am. Some of the storms could be severe. Low around 52. South southeast wind 18 to 21 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Showers then
Severe
T-Storms
 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 57. Breezy. 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 before 10pm, then rain after 10pm. Low around 47. Breezy. Chance of precipitation is 100%.
Showers and
Breezy
 Friday

Friday: Rain before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then rain likely and possibly a thunderstorm after 4pm. Cloudy, with a high near 56.
Showers

 Friday
Night
Friday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 44.
Rain Likely
Lo 53 °F Hi 62 °F Lo 50 °F Hi 61 °F Lo 52 °F Hi 57 °F Lo 47 °F Hi 56 °F Lo 44 °F

Flood Watch
Wind Advisory
 

Tonight
 
 A 50 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, mainly after 10am. High near 62. South southeast wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
 Rain. Low around 50. Breezy, with a south wind 20 to 24 mph, with gusts as high as 47 mph. Chance of precipitation is 80%. 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. High near 61. South wind 8 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. 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 1am, then showers and possibly a thunderstorm after 1am. Some of the storms could be severe. Low around 52. South southeast wind 18 to 21 mph, with gusts as high as 44 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 rain between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 57. Breezy. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
 
 Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Low around 47. Breezy. Chance of precipitation is 100%.
Friday
 
 Rain before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then rain likely and possibly a thunderstorm after 4pm. Cloudy, with a high near 56.
Friday Night
 
 Rain likely, mainly before 10pm. Mostly cloudy, with a low around 44.
Saturday
 
 A slight chance of rain before 10am. Mostly sunny, with a high near 56.
Saturday Night
 
 Mostly clear, with a low around 41.
Sunday
 
 Sunny, with a high near 56.
Sunday Night
 
 Mostly clear, with a low around 41.
Monday
 
 Sunny, with a high near 57.

 

Forecast from NOAA-NWS for San Mateo CA.