Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

SAC NWR (NWRC1)

Lat: 39.41722°NLon: 122.1825°WElev: 120.0ft.

NA

53°F

12°C

Humidity 89%
Wind Speed NE 2 MPH
Barometer NA
Dewpoint 50°F (10°C)
Visibility NA
Last update 20 Jan 04:29 PM PST
Extended Forecast for

4 Miles W Williams CA

  • Tonight

    Tonight: Patchy dense fog before 11pm, then widespread dense fog after 4am.  Otherwise, cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Dense Fog

  • Wednesday

    Wednesday: Widespread dense fog before 10am.  Otherwise, cloudy, with a high near 55. Calm wind.

    High: 55 °F

    Dense Fog
    then Cloudy

  • Wednesday Night

    Wednesday Night: Cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Cloudy

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 61. Light and variable wind.

    High: 61 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43. Calm wind.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy dense fog before 11pm, then widespread dense fog after 4am. Otherwise, cloudy, with a low around 46. Calm wind.
Wednesday
Widespread dense fog before 10am. Otherwise, cloudy, with a high near 55. Calm wind.
Wednesday Night
Cloudy, with a low around 48. Calm wind.
Thursday
Cloudy, then gradually becoming mostly sunny, with a high near 61. Light and variable wind.
Thursday Night
Mostly clear, with a low around 43. Calm wind.
Friday
Mostly sunny, with a high near 59.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 60.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Mostly cloudy, with a high near 55.
Sunday Night
Mostly cloudy, with a low around 39.
Monday
Partly sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Partly sunny, with a high near 57.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Williams CA
 39.14°N 122.22°W (Elev. 121 ft)
1:26 pm PST Jan 20, 2026
5pm PST Jan 20, 2026-6pm PST Jan 27, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database