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Harper School, CA Weather Forecast
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Harper School Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  |  |  |  | |  | | |  | |
| Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Showers Likely | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Clear | Partly Cloudy |
| Lo: 67°FLo: 19°C | Hi: 80°FHi: 27°C | Lo: 66°FLo: 19°C | Hi: 76°FHi: 24°C | Lo: 65°FLo: 18°C | Hi: 73°FHi: 23°C | Lo: 60°FLo: 16°C | Hi: 70°FHi: 21°C | Lo: 57°FLo: 14°C | Hi: 71°FHi: 22°C | Lo: 58°FLo: 14°C | Hi: 74°FHi: 23°C |
| POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 114 PM PDT Thu Oct 08 2026 
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Issued: 418 PM PDT Thu Oct 8 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
Tonight through Saturday...
The ridge is continuing to break down, which is allowing for a cooling trend beginning today into tomorrow, and then even moreso on Saturday as we begin to become influenced by an approaching trough and tropical system moving into the region. Mostly clear skies will persist through tomorrow, with ...