National Weather Service Forecast for: Grand Terrace CA
Issued by: National Weather Service San Diego, CA
Updated: 10:18 am PDT May 26, 2026
 
Tonight

Tonight: Patchy drizzle after 2am. Increasing clouds, with a low around 52. West wind 5 to 15 mph becoming south after midnight. Winds could gust as high as 25 mph.
Mostly Cloudy
then Patchy
Drizzle
 Wednesday

Wednesday: Patchy drizzle before 11am. Mostly cloudy, with a high near 66. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Patchy
Drizzle then
Partly Sunny
 Wednesday
Night
Wednesday Night: Patchy drizzle after 2am. Mostly cloudy, with a low around 52. Southwest wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 25 mph.
Mostly Cloudy
then Patchy
Drizzle
 Thursday

Thursday: Patchy drizzle before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 70. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Patchy
Drizzle then
Mostly Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 52. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 25 mph.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 75.
Mostly Sunny

 Friday
Night
Friday Night: Mostly clear, with a low around 54.
Mostly Clear

 Saturday

Saturday: Sunny, with a high near 82.
Sunny

 Saturday
Night
Saturday Night: Clear, with a low around 57.
Clear
Lo 52 °F Hi 66 °F Lo 52 °F Hi 70 °F Lo 52 °F Hi 75 °F Lo 54 °F Hi 82 °F Lo 57 °F

 

Tonight
 
 Patchy drizzle after 2am. Increasing clouds, with a low around 52. West wind 5 to 15 mph becoming south after midnight. Winds could gust as high as 25 mph.
Wednesday
 
 Patchy drizzle before 11am. Mostly cloudy, with a high near 66. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
 
 Patchy drizzle after 2am. Mostly cloudy, with a low around 52. Southwest wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 25 mph.
Thursday
 
 Patchy drizzle before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 70. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
 
 Partly cloudy, with a low around 52. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 25 mph.
Friday
 
 Mostly sunny, with a high near 75.
Friday Night
 
 Mostly clear, with a low around 54.
Saturday
 
 Sunny, with a high near 82.
Saturday Night
 
 Clear, with a low around 57.
Sunday
 
 Sunny, with a high near 86.
Sunday Night
 
 Clear, with a low around 58.
Monday
 
 Sunny, with a high near 90.
Monday Night
 
 Mostly clear, with a low around 60.
Tuesday
 
 Sunny, with a high near 91.

 

Forecast from NOAA-NWS for Grand Terrace CA.