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Riley School Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Partly Cloudy | Mostly Clear | Partly Cloudy | Partly Cloudy | Patchy Fog | Patchy Fog | Patchy Fog | Partly Cloudy | Partly Cloudy | Clear | Mostly Sunny | Clear |
| Hi: 83°FHi: 28°C | Lo: 57°FLo: 14°C | Hi: 88°FHi: 31°C | Lo: 59°FLo: 15°C | Hi: 86°FHi: 30°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 57°FLo: 14°C | Hi: 85°FHi: 29°C | Lo: 60°FLo: 16°C | Hi: 93°FHi: 34°C | Lo: 63°FLo: 17°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1135 PM PDT Fri Sep 18 2026 
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Issued: 151 AM PDT Sat Sep 19 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
The 00z sounding Friday afternoon shows a well mixed marine boundary layer, around 3000 feet deep. Low clouds will be patchy overnight through the coastal basin and scatter out to the coast between 8-11 AM this morning.
While the coastal basin will maintain modest minimum relative humidity values (30-60% inland, 60-80% coast) this afternoon, conditions will...