Spring Valley, CA Weather Forecast
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Spring Valley Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
| Partly Cloudy | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of T-Storm |
| Lo: 61°FLo: 16°C | Hi: 87°FHi: 31°C | Lo: 60°FLo: 16°C | Hi: 86°FHi: 30°C | Lo: 58°FLo: 14°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C | Lo: 63°FLo: 17°C | Hi: 86°FHi: 30°C | Lo: 67°FLo: 19°C | Hi: 88°FHi: 31°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1216 PM PDT Mon Aug 31 2026 

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Issued: 458 PM PDT Mon Aug 31 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
Today through Wednesday...
Current satellite and 500mb analysis reveals the upper ridge remains in control across the southeastern US with weak southwesterly flow aloft across southern California. The further displacement of the upper ridge allows for the continuation of the cooling trend observed through the last few days. ...
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