Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Clear

36°F

2°C

Humidity 93%
Wind Speed E 4 MPH
Barometer 30.3 in (1026.08 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 08 Dec 10:00 PM PST
Extended Forecast for

3 Miles W Yreka CA

  • Tonight

    Tonight: Partly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Patchy fog between 9am and 11am.  Otherwise, mostly sunny, with a high near 54. Light and variable wind.

    High: 54 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39. Light southwest wind.

    Low: 39 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Patchy fog between 9am and 11am.  Otherwise, mostly sunny, with a high near 56. Calm wind.

    High: 56 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 38. Calm wind.
Tuesday
Patchy fog between 9am and 11am. Otherwise, mostly sunny, with a high near 54. Light and variable wind.
Tuesday Night
Partly cloudy, with a low around 39. Light southwest wind.
Wednesday
Patchy fog between 9am and 11am. Otherwise, mostly sunny, with a high near 56. Calm wind.
Wednesday Night
Mostly clear, with a low around 37. Calm wind.
Thursday
Sunny, with a high near 55.
Thursday Night
Mostly clear, with a low around 36.
Friday
Sunny, with a high near 54.
Friday Night
Mostly clear, with a low around 36.
Saturday
Sunny, with a high near 54.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 51.
Sunday Night
Mostly cloudy, with a low around 39.
Monday
A chance of rain. Partly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Yreka CA
 41.72°N 122.68°W (Elev. 3199 ft)
9:41 pm PST Dec 8, 2025
10pm PST Dec 8, 2025-6pm PST Dec 15, 2025
 
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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