Expires:202512290200;;369420 FPUS56 KMTR 281102 ZFPMTR San Francisco Bay Area/Central California Zone Forecast National Weather Service San Francisco Bay Area 301 AM PST Sun Dec 28 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. CAZ506-290200- North Bay Interior Valleys- 301 AM PST Sun Dec 28 2025 .REST OF TONIGHT...Mostly cloudy. Patchy fog. Lows in the mid 30s to lower 40s. North winds up to 5 mph. .SUNDAY...Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the 50s. Northeast winds up to 5 mph...becoming southeast in the afternoon. .SUNDAY NIGHT...Mostly clear except patchy fog after midnight. Lows in the 30s to mid 40s. Northeast winds 5 to 10 mph. .MONDAY...Sunny. Patchy dense fog and frost in the morning. Highs in the upper 40s to lower 60s. East winds 5 to 10 mph. .MONDAY NIGHT...Mostly clear except patchy fog. Lows in the mid 30s to lower 40s. Northeast winds 5 to 10 mph. .TUESDAY...Sunny. Patchy dense fog. Highs in the upper 40s to lower 60s. .TUESDAY NIGHT...Mostly clear in the evening then becoming partly cloudy. Patchy fog. Lows in the 30s to mid 40s. .WEDNESDAY...Mostly cloudy. A slight chance of rain. Highs in the 40s to upper 50s. .WEDNESDAY NIGHT...Cloudy. Areas of fog. A chance of rain. Lows in the 40s. .NEW YEARS DAY AND THURSDAY NIGHT...Patchy fog. Rain likely. Highs in the upper 40s to mid 50s. Lows in the mid 40s to lower 50s. .FRIDAY...Patchy fog. Rain likely. Highs in the 50s. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. Patchy fog. A chance of rain. Lows in the mid 40s to lower 50s. Highs in the upper 40s to mid 50s. && TEMPERATURE / PRECIPITATION Santa Rosa 36 56 35 57 / 10 San Rafael 42 56 41 54 / 10 Napa 37 55 37 55 / 10 $$