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Sierra Intermediate School Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  |  | | | |  |  | | | | |
| Patchy Fog | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Sunny | Clear | Mostly Sunny | Mostly Clear | Partly Cloudy |
| Lo: 63°FLo: 17°C | Hi: 82°FHi: 28°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 83°FHi: 28°C | Lo: 61°FLo: 16°C | Hi: 82°FHi: 28°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1123 AM PDT Mon Sep 14 2026 
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Issued: 1043 PM PDT Mon Sep 14 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
A weak troughing pattern over the West will be reinforced with another shot of cooler air as another low pressure system moves southward Tuesday through Thursday. Pressure heights will continue fall, leading to a continued subtle cooling trend. Wednesday and Thursday will see the coolest temperatures of the week. There is a...