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Williams, California Weather Forecast
Williams, California Weather
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Weather Forecast for Williams, California : Sonoma County
Issued: 12:26 am PST Jan 25, 2026 Latitude: 38.4504686 Longitude: -122.8788828 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Cloudy on Overnight Mostly Cloudy on Sunday Mostly Sunny on Monday 10% chance of rain on Tuesday 20% chance of rain on Wednesday Morning Fog on Thursday Fog on Friday 10% chance of rain on Saturday
Low: 36°F High: 55°F High: 60°F High: 60°F High: 58°F High: 63°F High: 61°F High: 61°F
Low: 39°F Low: 38°F Low: 42°F Low: 41°F Low: 42°F Low: 43°F  
Cloudy Mostly Cloudy Mostly Sunny Rain Rain Morning Fog Fog Rain
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Current Conditions at
SANTA ROSA - (KSTS)
37°
Clear
as of 11:53 PM PST
Rel. Humidity: 80%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
7 MPH
280° West
Cloud Level(s): Clear
Current Conditions at
NAPA - (KAPC)
46°
Feels like 41°F
Clear
as of 11:54 PM PST
Rel. Humidity: 61%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
12 MPH
090° East
Cloud Level(s): Clear
Current Conditions at
VACAVILLE - (KVCB)
37°
Mostly Cloudy
Mist
as of 12:05 AM PST
Rel. Humidity: 100%
Dew Point: 37°F
Visibility: 6 Miles
Pressure: 30.14 in.
Flight Rule: IFR
Wind Data
Calm
Cloud Level(s): Broken at 500ft
Current Conditions at
TRAVIS AFB - (KSUU)
39°
Mostly Clear
Mist
as of 12:23 AM PST
Rel. Humidity: 93%
Dew Point: 37°F
Visibility: 1 1/8 Miles
Pressure: 30.11 in.
Flight Rule: IFR
Wind Data
5 MPH
0° North
Cloud Level(s): Few at 100ft
Cloudy on Overnight Overnight... Patchy frost after 4am. Otherwise, partly cloudy, with a low around 36. Northwest wind around 5 mph becoming calm.

Mostly Cloudy on Sunday Sunday... Areas of frost before 8am. Otherwise, mostly cloudy, with a high near 55. Light and variable wind.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 39. Calm wind.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 60. Calm wind becoming east southeast around 5 mph in the afternoon.

Patchy Fog on Monday Night Monday Night... Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 38. Calm wind.

10% chance of rain Tuesday Tuesday... A 10 percent chance of rain after 4pm. Patchy dense fog before 9am. Otherwise, mostly sunny, with a high near 60.

40% chance of rain Tuesday Night Tuesday Night... A 40 percent chance of rain, mainly after 10pm. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 42.

20% chance of rain Wednesday Wednesday... A chance of rain, mainly before 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 58.

10% chance of rain Wednesday Night Wednesday Night... A slight chance of rain before 10pm. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 41.

Morning Fog on Thursday Thursday... Patchy fog before 9am. Otherwise, mostly sunny, with a high near 63.

Patchy Fog on Thursday Night Thursday Night... Patchy fog. Otherwise, mostly cloudy, with a low around 42.

Fog on Friday Friday... Areas of fog. Otherwise, mostly cloudy, with a high near 61.

Patchy Fog on Friday Night Friday Night... Patchy fog. Otherwise, mostly cloudy, with a low around 43.

10% chance of rain Saturday Saturday... A slight chance of rain. Areas of fog. Otherwise, mostly cloudy, with a high near 61.

Current Radar Image


Sun Almanac for Williams, California
Sunrise: 07:22 AM
Sunset: 5:26 PM
Civil Sunrise:06:54 AM
Civil Sunset: 5:54 PM
Nautical Sunrise: 06:22 AM
Nautical Sunset: 6:26 PM
Astro Sunrise: 05:50 AM
Astro Sunset: 6:58 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.