Fallon, California Weather
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Weather Forecast for Fallon, California : Marin County
Issued: 1:26 pm PDT Sep 15, 2025 Latitude: 38.2746396 Longitude: -122.9058295 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Patchy Fog on Overnight Morning Fog on Tuesday Sunny on Wednesday 20% chance of on Thursday 20% chance of on Friday 10% chance of rain on Saturday Patchy Fog on Sunday Mostly Sunny on Monday
Low: 53°F High: 77°F High: 75°F High: 69°F High: 70°F High: 70°F High: 69°F High: 71°F
Low: 54°F Low: 55°F Low: 57°F Low: 56°F Low: 55°F Low: 55°F  
Patchy Fog Morning Fog Sunny Partly Sunny Partly Sunny Rain Patchy Fog Mostly Sunny
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Current Conditions at
SANTA ROSA - (KSTS)
63°
Clear
as of 11:53 PM PDST
Rel. Humidity: 72%
Dew Point: 54°F
Visibility: 10 Miles
Pressure: 29.87 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
NAPA - (KAPC)
66°
Clear
as of 11:54 PM PDST
Rel. Humidity: 72%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.86 in.
Flight Rule: VFR
Wind Data
3 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
CONCORD - (KCCR)
72°
Clear
as of 11:53 PM PDST
Rel. Humidity: 53%
Dew Point: 54°F
Visibility: 10 Miles
Pressure: 29.86 in.
Flight Rule: VFR
Wind Data
5 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
VACAVILLE - (KVCB)
64°
Clear
as of 11:53 PM PDST
Rel. Humidity: 55%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
3 MPH
220° Southwest
Cloud Level(s): Clear
Patchy Fog on Overnight Overnight... Patchy fog. Otherwise, mostly clear, with a low around 53. Calm wind.
Morning Fog on Tuesday Tuesday... Areas of fog before 9am. Otherwise, sunny, with a high near 77. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 54. West wind 5 to 10 mph becoming light west northwest in the evening.
Sunny on Wednesday Wednesday... Sunny, with a high near 75. Light northwest wind becoming west 5 to 10 mph in the afternoon.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 55. West wind 6 to 11 mph becoming light in the evening. Winds could gust as high as 18 mph.
20% chance of Thursday Thursday... A 20 percent chance of showers after 11am. Partly sunny, with a high near 69. New precipitation amounts of less than a tenth of an inch possible.
30% chance of thunderstorms Thursday Night Thursday Night... A slight chance of showers, then a chance of showers and thunderstorms after 11pm. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.
20% chance of Friday Friday... A chance of showers, mainly before 11am. Partly sunny, with a high near 70.
10% chance of rain Friday Night Friday Night... A slight chance of showers. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 56.
10% chance of rain Saturday Saturday... A slight chance of showers before 11am. Patchy fog before 11am. Otherwise, mostly sunny, with a high near 70.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 55.
Patchy Fog on Sunday Sunday... Patchy fog. Otherwise, mostly sunny, with a high near 69.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 55.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 71.
Current Radar Image


Sun Almanac for Fallon, California
Sunrise: 06:55 AM
Sunset: 7:18 PM
Civil Sunrise:06:28 AM
Civil Sunset: 7:44 PM
Nautical Sunrise: 05:57 AM
Nautical Sunset: 8:15 PM
Astro Sunrise: 05:26 AM
Astro Sunset: 8:47 PM
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