National Weather Service Forecast for: Fallbrook CA
Issued by: National Weather Service San Diego, CA
Updated: 2:58 am PST Dec 22, 2025
 
Today

Today: Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 69. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Areas Fog
then Mostly
Cloudy
 Tonight

Tonight: Cloudy, with a low around 53. Calm wind.
Cloudy

 Tuesday

Tuesday: A chance of rain, mainly after 4pm. Cloudy, with a high near 64. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain

 Tuesday
Night
Tuesday Night: Rain, mainly after 10pm. Low around 56. Southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Rain

 Wednesday

Wednesday: Rain, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 63. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Heavy Rain

 Wednesday
Night
Wednesday Night: Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 53. Chance of precipitation is 100%.
Heavy Rain

 Christmas
Day
Christmas Day: Rain. High near 63. Chance of precipitation is 80%.
Rain

 Thursday
Night
Thursday Night: Showers. Cloudy, with a low around 52.
Showers

 Friday

Friday: Showers. Mostly cloudy, with a high near 61.
Showers
Hi 69 °F Lo 53 °F Hi 64 °F Lo 56 °F Hi 63 °F Lo 53 °F Hi 63 °F Lo 52 °F Hi 61 °F

Flood Watch
Dense Fog Advisory
 

Today
 
 Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 69. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Tonight
 
 Cloudy, with a low around 53. Calm wind.
Tuesday
 
 A chance of rain, mainly after 4pm. Cloudy, with a high near 64. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 Rain, mainly after 10pm. Low around 56. Southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday
 
 Rain, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 63. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Wednesday Night
 
 Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 53. Chance of precipitation is 100%.
Christmas Day
 
 Rain. High near 63. Chance of precipitation is 80%.
Thursday Night
 
 Showers. Cloudy, with a low around 52.
Friday
 
 Showers. Mostly cloudy, with a high near 61.
Friday Night
 
 A chance of showers. Mostly cloudy, with a low around 47.
Saturday
 
 A chance of showers. Mostly sunny, with a high near 62.
Saturday Night
 
 A slight chance of showers. Partly cloudy, with a low around 45.
Sunday
 
 A slight chance of showers. Mostly sunny, with a high near 65.

 

Forecast from NOAA-NWS for Fallbrook CA.