National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Mostly Cloudy

43°F

6°C

Humidity 86%
Wind Speed E 3 MPH
Barometer 30.32 in (1026.75 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 07 Dec 07:20 PM PST
Extended Forecast for

5 Miles W Fort Jones CA

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 33. Light and variable wind.

    Low: 33 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 1pm. Otherwise, mostly sunny, with a high near 53. Calm wind.

    High: 53 °F

    Patchy Fog

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. Southwest wind 7 to 9 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after 10am. Partly sunny, with a high near 55. West southwest wind around 7 mph.

    High: 55 °F

    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 38. Southwest wind around 6 mph.

    Low: 38 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: A 20 percent chance of rain before 10am. Patchy fog between 10am and noon. Otherwise, partly sunny, with a high near 57.

    High: 57 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, sunny, with a high near 56.

    High: 56 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 33. Light and variable wind.
Monday
Patchy fog before 1pm. Otherwise, mostly sunny, with a high near 53. Calm wind.
Monday Night
Partly cloudy, with a low around 34. Southwest wind 7 to 9 mph.
Tuesday
A 20 percent chance of rain after 10am. Partly sunny, with a high near 55. West southwest wind around 7 mph.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 38. Southwest wind around 6 mph.
Wednesday
A 20 percent chance of rain before 10am. Patchy fog between 10am and noon. Otherwise, partly sunny, with a high near 57.
Wednesday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 34.
Thursday
Patchy fog before 11am. Otherwise, sunny, with a high near 56.
Thursday Night
Mostly clear, with a low around 34.
Friday
Sunny, with a high near 57.
Friday Night
Mostly clear, with a low around 33.
Saturday
Sunny, with a high near 58.
Saturday Night
Partly cloudy, with a low around 34.
Sunday
A slight chance of rain. Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles W Fort Jones CA
 41.61°N 122.94°W (Elev. 2999 ft)
Last Update:
3:41 pm PST Dec 7, 2025
Forecast Valid:
7pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation