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

40°F

4°C

Humidity 92%
Wind Speed N 3 MPH
Barometer 30.34 in (1027.43 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 07 Dec 08:53 PM PST
Extended Forecast for

3 Miles W Yreka CA

  • Tonight

    Tonight: Partly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Partly Cloudy

  • Monday

    Monday: Patchy fog before noon. Otherwise, mostly sunny, with a high near 52. Calm wind.

    High: 52 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38. Southwest wind 5 to 7 mph.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after 10am. Partly sunny, with a high near 54. West southwest wind around 6 mph.

    High: 54 °F

    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 41. Southwest wind 3 to 5 mph.

    Low: 41 °F

    Slight Chance
    Rain

  • Wednesday

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

    High: 57 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

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

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 37. Calm wind.
Monday
Patchy fog before noon. Otherwise, mostly sunny, with a high near 52. Calm wind.
Monday Night
Partly cloudy, with a low around 38. Southwest wind 5 to 7 mph.
Tuesday
A 20 percent chance of rain after 10am. Partly sunny, with a high near 54. West southwest wind around 6 mph.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 41. Southwest wind 3 to 5 mph.
Wednesday
A 20 percent chance of rain before 10am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 57.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
Sunny, with a high near 56.
Thursday Night
Mostly clear, with a low around 38.
Friday
Sunny, with a high near 55.
Friday Night
Mostly clear, with a low around 36.
Saturday
Sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Mostly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Yreka CA
 41.72°N 122.68°W (Elev. 3199 ft)
Last Update:
3:41 pm PST Dec 7, 2025
Forecast Valid:
9pm 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