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Alto, California Weather Forecast
Alto, California Weather
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Weather Forecast for Alto, California : Marin County
Issued: 1:24 pm PST Dec 17, 2025 Latitude: 37.9043701 Longitude: -122.5255306 View on Google Maps

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Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Morning Fog on Tonight 30% chance of rain on Thursday 80% chance of rain on Friday 80% chance of rain on Saturday Thunderstorms on Sunday 70% chance of rain on Monday Rain on Tuesday 70% chance of rain on Wednesday
Low: 45°F High: 57°F High: 57°F High: 55°F High: 57°F High: 56°F High: 53°F High: 54°F
Low: 50°F Low: 51°F Low: 52°F Low: 50°F Low: 47°F Low: 48°F  
Morning Fog Rain Rain Rain Thunderstorms Rain Rain Rain
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Current Conditions at
SAN FRANCISCO - (KSFO)
55°
Mostly Clear
as of 6:56 PM PST
Rel. Humidity: 76%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: VFR
Wind Data
6 MPH
300° Northwest
Cloud Level(s): Few at 1600ft
Current Conditions at
OAKLAND - (KOAK)
52°
Mostly Cloudy
Shallow Fog
as of 6:53 PM PST
Rel. Humidity: 100%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Few at 800ft, Broken at 1000ft
Current Conditions at
NAPA - (KAPC)
52°
Clear
as of 6:54 PM PST
Rel. Humidity: 87%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
6 MPH
120° Southeast
Cloud Level(s): Clear
Current Conditions at
CONCORD - (KCCR)
55°
Clear
as of 6:53 PM PST
Rel. Humidity: 87%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: VFR
Wind Data
5 MPH
010° North
Cloud Level(s): Clear
Morning Fog on Tonight Tonight... Patchy drizzle after 8pm. Widespread dense fog, mainly after 4am. Otherwise, increasing clouds, with a low around 45. Calm wind.
30% chance of rain Thursday Thursday... A 30 percent chance of rain after 4pm. Widespread dense fog, mainly before 10am. Otherwise, mostly cloudy, with a high near 57. Calm wind.
60% chance of rain Thursday Night Thursday Night... Rain likely, mainly between 10pm and 4am. Patchy fog between 9pm and 1am. Otherwise, cloudy, with a low around 50. Light south southwest wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
80% chance of rain Friday Friday... Rain, mainly after 10am. High near 57. South wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
90% chance of rain Friday Night Friday Night... Rain, mainly before 4am. Low around 51. Southwest wind 6 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
80% chance of rain Saturday Saturday... Rain, mainly after 10am. High near 55. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
90% chance of thunderstorms Saturday Night Saturday Night... Rain before 10pm, then showers and possibly a thunderstorm after 10pm. Low around 52. Chance of precipitation is 90%.
Thunderstorms on Sunday Sunday... Showers and possibly a thunderstorm. Cloudy, with a high near 57.
Rain on Sunday Night Sunday Night... Rain. Cloudy, with a low around 50.
70% chance of rain Monday Monday... Rain likely. Cloudy, with a high near 56.
70% chance of rain Monday Night Monday Night... Rain likely. Cloudy, with a low around 47.
Rain on Tuesday Tuesday... Rain. Cloudy, with a high near 53.
Rain on Tuesday Night Tuesday Night... Rain. Cloudy, with a low around 48.
70% chance of rain Wednesday Wednesday... Rain likely. Cloudy, with a high near 54.
Current Radar Image


Sun Almanac for Alto, California
Sunrise: 07:20 AM
Sunset: 4:53 PM
Civil Sunrise:06:51 AM
Civil Sunset: 5:22 PM
Nautical Sunrise: 06:18 AM
Nautical Sunset: 5:55 PM
Astro Sunrise: 05:46 AM
Astro Sunset: 6:27 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.