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

Today: Partly sunny, with a high near 75. Calm wind becoming southwest around 5 mph in the afternoon.
Partly Sunny
 Tonight

Tonight: Mostly cloudy, with a low around 52. South wind around 5 mph becoming calm.
Mostly Cloudy
 Tuesday

Tuesday: A chance of rain, mainly after 4pm. Mostly cloudy, with a high near 66. South wind 5 to 10 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. The rain could be heavy at times. Low around 55. Southeast wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Heavy Rain
 Wednesday

Wednesday: Rain, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 63. South wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust 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 51. 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 50.
Showers
 Friday

Friday: Showers. Cloudy, with a high near 61.
Showers
Hi 75 °F Lo 52 °F Hi 66 °F Lo 55 °F Hi 63 °F Lo 51 °F Hi 63 °F Lo 50 °F Hi 61 °F

Air Quality Alert
Flood Watch
Dense Fog Advisory
 

Today
 
 Partly sunny, with a high near 75. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
 
 Mostly cloudy, with a low around 52. South wind around 5 mph becoming calm.
Tuesday
 
 A chance of rain, mainly after 4pm. Mostly cloudy, with a high near 66. South wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 Rain, mainly after 10pm. The rain could be heavy at times. Low around 55. Southeast wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Wednesday
 
 Rain, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 63. South wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust 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 51. Chance of precipitation is 100%.
Christmas Day
 
 Rain. High near 63. Chance of precipitation is 80%.
Thursday Night
 
 Showers. Cloudy, with a low around 50.
Friday
 
 Showers. Cloudy, with a high near 61.
Friday Night
 
 A chance of showers. Mostly cloudy, with a low around 45.
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 44.
Sunday
 
 A slight chance of showers. Mostly sunny, with a high near 65.

 

Forecast from NOAA-NWS for Grand Terrace CA.