| National Weather Service Forecast for:
Grand Terrace CA Issued by: National Weather Service San Diego, CA |
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| Updated: 12:29 am PDT Jun 22, 2026 | ||||||||||||||||||
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| Overnight |
Mostly clear, with a low around 60. South wind around 5 mph. |
| Monday |
Sunny, with a high near 91. Light west wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. |
| Monday Night |
Mostly clear, with a low around 63. Southwest wind 5 to 10 mph. |
| Tuesday |
Sunny, with a high near 96. Light west wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. |
| Tuesday Night |
Partly cloudy, with a low around 68. Southwest wind 5 to 10 mph becoming light west after midnight. |
| Wednesday |
Mostly sunny, with a high near 97. |
| Wednesday Night |
Mostly clear, with a low around 64. |
| Thursday |
Sunny, with a high near 94. |
| Thursday Night |
Mostly clear, with a low around 62. |
| Friday |
Sunny, with a high near 91. |
| Friday Night |
Clear, with a low around 60. |
| Saturday |
Sunny, with a high near 89. |
| Saturday Night |
Mostly clear, with a low around 59. |
| Sunday |
Mostly sunny, with a high near 83. |
Forecast from NOAA-NWS for Grand Terrace CA.
