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Napa County Weather Forecast
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| Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 76°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 76°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 76°FHi: 24°C Lo: 55°FLo: 13°C | Hi: 76°FHi: 24°C Lo: 55°FLo: 13°C | Hi: 76°FHi: 24°C Lo: 55°FLo: 13°C | Lo: 59°FLo: 15°C | Hi: 76°FHi: 24°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 602 AM PDT Sun Aug 16 2026 
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Napa County Forecast Discussion
Issued: 850 AM PDT Sun Aug 16 2026
Key Messages
Updated at 1102 PM PDT Sat Aug 15 2026
- Gradual warming and drying trend into next week
Aviation
... (12Z TAFS) Issued at 435 AM PDT Sun Aug 16 2026
IFR to LIFR conditions are being observed across the Bay Area and Monterey Peninsula thanks to a compressing marine layer. LIFR CIGs are most likely directly along the coast while confidence is slightly higher in IFR CIGs across the interior. With the compressing marine layer there is some potential for fog to d...