Fairfax, CA Weather Forecast
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Fairfax Weather Forecast
| REST OF TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
| Patchy Fog | Patchy Fog | Partly Cloudy | Patchy Fog | Patchy Fog | Patchy Fog | Mostly Clear | Partly Cloudy | Partly Cloudy | Chance of Rain | Partly Cloudy | Chance of Rain |
| Lo: 46°FLo: 8°C | Hi: 75°FHi: 24°C | Lo: 46°FLo: 8°C | Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C | Hi: 81°FHi: 27°C | Lo: 56°FLo: 13°C | Hi: 85°FHi: 29°C Lo: 56°FLo: 13°C | Hi: 85°FHi: 29°C Lo: 56°FLo: 13°C | Hi: 85°FHi: 29°C | Lo: 60°FLo: 16°C | Hi: 85°FHi: 29°C Lo: 56°FLo: 13°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 302 AM PDT Sat Sep 05 2026 

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Issued: 440 AM PDT Sat Sep 5 2026
Key Messages
Updated at 1122 AM PDT Fri Sep 4 2026- Hazardous conditions at Pacific Coast beaches Friday through Monday
- Below normal temperatures through the weekend, gradual warming and drying trend kicks off Monday
- Remnant tropical moisture likely Tuesday through Thursday
Aviation
... (12Z TAFS) Issued at 426 AM PDT Sat Sep 5 2026
Patchy stratus is developing along the SF Bay shoreline while fog is developing across the North Bay Valleys. Not anticipating stratus/fog to spread beyond the already im...
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