National Weather Service Forecast for: Grand Terrace CA
Issued by: National Weather Service San Diego, CA
Updated: 12:51 pm PST Dec 23, 2025
 
This
Afternoon
This Afternoon: A chance of showers, mainly after 4pm. Mostly cloudy, with a high near 68. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Chance
Showers
 Tonight

Tonight: Showers, mainly after 10pm. Low around 54. Light and variable wind becoming southeast 10 to 15 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Showers

 Wednesday

Wednesday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 65. Breezy, with a southeast wind 15 to 20 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Heavy Rain
and Breezy
 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 53. South wind around 5 mph becoming calm after midnight. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Heavy Rain

 Christmas
Day
Christmas Day: A chance of showers, then showers likely and possibly a thunderstorm after 4pm. Cloudy, with a high near 64. East wind 10 to 20 mph becoming south in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely
 Thursday
Night
Thursday Night: Showers likely and possibly a thunderstorm, then showers after 10pm. Low around 51. Breezy. Chance of precipitation is 80%.
Showers and
Breezy
 Friday

Friday: Showers. High near 61. Chance of precipitation is 90%.
Showers then
Showers
Likely
 Friday
Night
Friday Night: Showers likely, mainly before 10pm. Mostly cloudy, with a low around 43.
Showers
Likely
 Saturday

Saturday: Sunny, with a high near 61.
Sunny
Hi 68 °F Lo 54 °F Hi 65 °F Lo 53 °F Hi 64 °F Lo 51 °F Hi 61 °F Lo 43 °F Hi 61 °F

Flood Watch
Wind Advisory
 

This Afternoon
 
 A chance of showers, mainly after 4pm. Mostly cloudy, with a high near 68. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Tonight
 
 Showers, mainly after 10pm. Low around 54. Light and variable wind becoming southeast 10 to 15 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
 
 Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 65. Breezy, with a southeast wind 15 to 20 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Wednesday Night
 
 Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 53. South wind around 5 mph becoming calm after midnight. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Christmas Day
 
 A chance of showers, then showers likely and possibly a thunderstorm after 4pm. Cloudy, with a high near 64. East wind 10 to 20 mph becoming south in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
 
 Showers likely and possibly a thunderstorm, then showers after 10pm. Low around 51. Breezy. Chance of precipitation is 80%.
Friday
 
 Showers. High near 61. Chance of precipitation is 90%.
Friday Night
 
 Showers likely, mainly before 10pm. Mostly cloudy, with a low around 43.
Saturday
 
 Sunny, with a high near 61.
Saturday Night
 
 Clear, with a low around 42.
Sunday
 
 Sunny, with a high near 65.
Sunday Night
 
 Clear, with a low around 44.
Monday
 
 Sunny, with a high near 68.

 

Forecast from NOAA-NWS for Grand Terrace CA.