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Marconi, California Weather Forecast
Marconi, California Weather
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Weather Forecast for Marconi, California : Marin County
Issued: 12:26 am PST Dec 18, 2025 Latitude: 38.1438103 Longitude: -122.8783278 View on Google Maps

MouseOver for Detail Forecast
Overnight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Morning Fog on Overnight 60% chance of rain on Thursday 90% 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: 47°F High: 54°F High: 56°F High: 54°F High: 56°F High: 53°F High: 51°F High: 51°F
Low: 52°F Low: 51°F Low: 52°F Low: 50°F Low: 48°F Low: 49°F  
Morning Fog Rain Rain Rain Thunderstorms Rain Rain Rain
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Current Conditions at
SANTA ROSA - (KSTS)
41°
Mostly Cloudy
Fog
as of 12:53 AM PST
Rel. Humidity: 100%
Dew Point: 41°F
Visibility: 1/2 Miles
Pressure: 30.15 in.
Flight Rule: IFR
Wind Data
Calm
Current Conditions at
NAPA - (KAPC)
46°
Cloudy
Mist
as of 12:54 AM PST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 5 Miles
Pressure: 30.16 in.
Flight Rule: LIFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 200ft
Current Conditions at
SAN FRANCISCO - (KSFO)
50°
Mostly Clear
as of 12:56 AM PST
Rel. Humidity: 87%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.14 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Few at 1400ft
Current Conditions at
CONCORD - (KCCR)
52°
Cloudy
Mist
as of 12:53 AM PST
Rel. Humidity: 100%
Dew Point: 52°F
Visibility: 5 Miles
Pressure: 30.16 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 1500ft
Morning Fog on Overnight Overnight... Patchy drizzle. Patchy dense fog after 5am. Otherwise, mostly cloudy, with a low around 47. North northwest wind 3 to 5 mph.

60% chance of rain Thursday Thursday... Rain likely, mainly after 4pm. Patchy dense fog before 10am, then patchy dense fog after 5pm. Otherwise, mostly cloudy, with a high near 54. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.

80% chance of rain Thursday Night Thursday Night... Rain. Areas of fog before 10pm. Low around 52. Calm wind becoming south southwest around 6 mph in the evening. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

90% chance of rain Friday Friday... Rain. High near 56. South wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

90% chance of rain Friday Night Friday Night... Rain, mainly before 4am. Low around 51. West wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

80% chance of rain Saturday Saturday... Rain, mainly after 10am. High near 54. 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 56.

Rain on Sunday Night Sunday Night... Rain. Cloudy, with a low around 50.

70% chance of rain Monday Monday... Rain likely. Mostly cloudy, with a high near 53.

70% chance of rain Monday Night Monday Night... Rain likely. Mostly cloudy, with a low around 48.

Rain on Tuesday Tuesday... Rain. Mostly cloudy, with a high near 51.

Rain on Tuesday Night Tuesday Night... Rain. Cloudy, with a low around 49.

70% chance of rain Wednesday Wednesday... Rain likely. Mostly cloudy, with a high near 51.

Current Radar Image


Sun Almanac for Marconi, California
Sunrise: 07:23 AM
Sunset: 4:54 PM
Civil Sunrise:06:53 AM
Civil Sunset: 5:23 PM
Nautical Sunrise: 06:20 AM
Nautical Sunset: 5:56 PM
Astro Sunrise: 05:48 AM
Astro Sunset: 6:29 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.