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City of Walnut, CAWalnut, CA Weather Forecast
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| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Mostly Cloudy | Patchy Drizzle | Mostly Cloudy | Sunny | Mostly Clear | Sunny | Clear | Sunny | Mostly Clear | Partly Cloudy | Mostly Clear | Partly Cloudy |
| Lo: 60°FLo: 16°C | Hi: 76°FHi: 24°C | Lo: 60°FLo: 16°C | Hi: 80°FHi: 27°C | Hi: 90°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 90°FHi: 32°C | Lo: 67°FLo: 19°C | Hi: 90°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 86°FHi: 30°C | |
POP = Probability of Precipitation.
Weather Outlook Updated: 201 PM PDT Sun Sep 20 2026 
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Issued: 230 PM PDT Sun Sep 20 2026
Aviation
...20/2007Z.
At 2000Z at KLAX, the marine layer was 2700 ft deep. The top of the inversion was at 4000 ft with a temperature of 21 C.
High confidence in VFR conds for KPMD & KWJF.
Low to moderate confidence in the remaining sites. The timing of CIG and any VSBY restrictions may be off 3 hrs and flight minimums by one category. High clouds may disturb the marine layer and sites with cigs may bounce between categories at times. There is a 5-10 percent chance of -DZ/-SHRA focused through 18Z. ...