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Stephen Decatur School Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT |
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| Mostly Sunny | Partly Cloudy | Mostly Sunny | Patchy Fog | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 81°FHi: 27°C | Lo: 63°FLo: 17°C | Hi: 80°FHi: 27°C | Lo: 63°FLo: 17°C | Hi: 81°FHi: 27°C | Lo: 66°FLo: 19°C | Hi: 84°FHi: 29°C | Lo: 70°FLo: 21°C | Hi: 87°FHi: 31°C | Lo: 70°FLo: 21°C | Hi: 86°FHi: 30°C | Lo: 69°FLo: 21°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1206 AM PDT Wed Sep 02 2026 
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Issued: 1030 PM PDT Tue Sep 1 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
A low pressure system near the west coast will maintain onshore flow with a deeper marine layer and cooler, drier conditions through Friday. Inland high temperatures will be 5 to 10 degrees below average. High temperatures will range from the mid to upper 70s near the coast, the mid 80s to lower 90s for the Inland Empire an...