National Weather Service Forecast for: Belmont CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 12:48 am PST Dec 23, 2025
 
Overnight

Overnight: A 30 percent chance of rain. Areas of fog. Otherwise, cloudy, with a low around 53. South southeast wind 3 to 5 mph.
Chance Rain
and Areas Fog

 Tuesday

Tuesday: Rain likely, mainly after 4pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 62. South wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
and Patchy
Fog then Rain
Likely
 Tuesday
Night
Tuesday Night: Rain. Low around 52. Breezy, with a southeast wind 14 to 19 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 50 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half 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 61. Light southeast wind becoming south southeast 9 to 14 mph in the morning. Winds could gust 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 after 7pm. Some of the storms could be severe. Low around 51. Breezy, with a south southeast wind around 23 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Breezy.
Severe
T-Storms
then Rain
 Christmas
Day
Christmas Day: Showers and possibly a thunderstorm. 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: Rain before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then rain after 1am. Low around 47. Breezy. Chance of precipitation is 100%.
Showers and
Breezy

 Friday

Friday: Rain. Cloudy, with a high near 56.
Rain

 Friday
Night
Friday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 45.
Rain Likely
Lo 53 °F Hi 62 °F Lo 52 °F Hi 61 °F Lo 51 °F Hi 57 °F Lo 47 °F Hi 56 °F Lo 45 °F

Flood Watch
Wind Advisory
 

Overnight
 
 A 30 percent chance of rain. Areas of fog. Otherwise, cloudy, with a low around 53. South southeast wind 3 to 5 mph.
Tuesday
 
 Rain likely, mainly after 4pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 62. South wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 Rain. Low around 52. Breezy, with a southeast wind 14 to 19 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 50 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half 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 61. Light southeast wind becoming south southeast 9 to 14 mph in the morning. Winds could gust 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 after 7pm. Some of the storms could be severe. Low around 51. Breezy, with a south southeast wind around 23 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Christmas Day
 
 Showers and possibly a thunderstorm. High near 57. Breezy. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
 
 Rain before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then rain after 1am. Low around 47. Breezy. Chance of precipitation is 100%.
Friday
 
 Rain. Cloudy, with a high near 56.
Friday Night
 
 Rain likely, mainly before 10pm. Mostly cloudy, with a low around 45.
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
 
 Mostly sunny, with a high near 57.

 

Forecast from NOAA-NWS for Belmont CA.