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

Montague Siskiyou County Airport (KSIY)

Lat: 41.77375°NLon: 122.46817°WElev: 2644.0ft.

Clear

28°F

-2°C

Humidity 92%
Wind Speed N 0 MPH
Barometer 30.22 in (1023.37 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 21 Jan 12:35 AM PST
Extended Forecast for

5 Miles W Fort Jones CA

  • Overnight

    Overnight: Areas of fog.  Otherwise, mostly cloudy, with a low around 30. Light southeast wind.

    Low: 30 °F

    Areas Fog

  • Wednesday

    Wednesday: Patchy fog before 10am.  Otherwise, mostly cloudy, with a high near 50. Light and variable wind.

    High: 50 °F

    Patchy Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 4am.  Otherwise, mostly cloudy, with a low around 31. Light and variable wind.

    Low: 31 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 10am.  Otherwise, sunny, with a high near 50. Calm wind.

    High: 50 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 33.

    Low: 33 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 45.

    High: 45 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

Detailed Forecast

Overnight
Areas of fog. Otherwise, mostly cloudy, with a low around 30. Light southeast wind.
Wednesday
Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 50. Light and variable wind.
Wednesday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 31. Light and variable wind.
Thursday
Patchy fog before 10am. Otherwise, sunny, with a high near 50. Calm wind.
Thursday Night
Mostly clear, with a low around 26. Calm wind.
Friday
Sunny, with a high near 48.
Friday Night
Clear, with a low around 33.
Saturday
Sunny, with a high near 45.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Partly sunny, with a high near 46.
Sunday Night
Mostly cloudy, with a low around 28.
Monday
Partly sunny, with a high near 49.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Partly sunny, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles W Fort Jones CA
 41.61°N 122.94°W (Elev. 2999 ft)
12:41 am PST Jan 21, 2026
12am PST Jan 21, 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