Expires:202512100500;;278888 FPUS56 KMTR 091402 ZFPMTR San Francisco Bay Area/Central California Zone Forecast National Weather Service San Francisco Bay Area 601 AM PST Tue Dec 9 2025 This is an automatically generated product that provides average values for large geographic areas. For a more site specific forecast...please visit weather.gov/sanfrancisco (1) Select a location from the drop down menu above the map... -- or -- (2) Click a location on the map. You can refine your selection by clicking on the map displayed on the resulting page. CAZ506-100500- North Bay Interior Valleys- 601 AM PST Tue Dec 9 2025 .TODAY...Mostly cloudy in the morning then becoming sunny. Areas of fog in the morning. Highs in the 50s to 60s. East winds up to 5 mph...becoming southeast in the afternoon. .TONIGHT...Mostly clear in the evening then becoming partly cloudy. Patchy fog in the evening. Areas of dense fog after midnight. Lows in the 40s to lower 50s. Northeast winds up to 5 mph. .WEDNESDAY...Partly cloudy in the morning then becoming sunny. Areas of dense fog in the morning. Highs in the mid 50s to lower 70s. Northeast winds 5 to 10 mph...becoming southeast in the afternoon. .WEDNESDAY NIGHT...Mostly clear except patchy fog in the evening. Areas of fog after midnight. Lows in the 40s to lower 50s. North winds up to 5 mph. .THURSDAY...Partly cloudy in the morning then becoming sunny. Areas of fog in the morning. Highs in the upper 50s to lower 70s. Northeast winds 5 to 10 mph...becoming southeast in the afternoon. .THURSDAY NIGHT...Mostly clear in the evening then becoming partly cloudy. Patchy fog. Lows in the 40s to lower 50s. .FRIDAY...Partly cloudy in the morning then becoming sunny. Highs in the mid 50s to lower 70s. .FRIDAY NIGHT...Mostly clear in the evening then becoming partly cloudy. Patchy fog. Lows in the 30s to upper 40s. .SATURDAY...Partly cloudy in the morning then becoming sunny. Highs in the 50s to 60s. .SATURDAY NIGHT...Partly cloudy. Areas of fog. Lows in the 40s. .SUNDAY...Mostly cloudy in the morning then becoming partly cloudy. Areas of fog. Highs in the lower 50s to mid 60s. .SUNDAY NIGHT...Mostly cloudy. Areas of fog. A slight chance of rain. Lows in the 40s to lower 50s. .MONDAY...Mostly cloudy. Areas of fog. A chance of rain. Highs in the 50s to mid 60s. && TEMPERATURE / PRECIPITATION Santa Rosa 64 42 67 / San Rafael 56 44 58 / Napa 59 42 61 / $$