| National Weather Service Forecast for:
Grand Terrace CA Issued by: National Weather Service San Diego, CA |
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| Updated: 12:51 pm PST Dec 23, 2025 | ||||||||||||||||||
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| 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.