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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Rain

45°F

7°C

Humidity 81%
Wind Speed SE 31 MPH
Barometer 29.41 in (995.94 mb)
Dewpoint 39°F (4°C)
Visibility 8.00 mi
Wind Chill35°F (2°C)
Last update 25 Dec 04:35 AM PST
Extended Forecast for

10 Miles NNE Montague CA

High Wind Warning December 25, 07:00am until December 25, 01:00pm
Click here for hazard details and duration
High Wind Warning

  • Overnight

    Overnight: Showers. Snow level 5300 feet. Steady temperature around 38. Breezy, with a south southeast wind around 29 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Showers and
    Breezy

  • Christmas Day

    Christmas Day: Showers. Snow level 5000 feet lowering to 4300 feet. High near 44. Windy, with a south southeast wind 25 to 30 mph, with gusts as high as 47 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 44 °F

    Showers and
    Windy

  • Thursday Night

    Thursday Night: Rain showers before 4am, then rain and snow showers likely between 4am and 5am, then rain showers likely after 5am. Snow level 4000 feet. Low around 32. South southeast wind 6 to 11 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 32 °F

    Showers then
    Rain/Snow
    Likely

  • Friday

    Friday: Showers likely before 10am, then rain, mainly between 10am and 4pm. Snow level 3900 feet. High near 43. South southeast wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 43 °F

    Rain

  • Friday Night

    Friday Night: A 40 percent chance of rain before 10pm. Snow level 3600 feet lowering to 2700 feet after midnight . Mostly cloudy, with a low around 28. West wind 3 to 5 mph.

    Low: 28 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 20.

    Low: 20 °F

    Mostly Clear

Detailed Forecast

Overnight
Showers. Snow level 5300 feet. Steady temperature around 38. Breezy, with a south southeast wind around 29 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Christmas Day
Showers. Snow level 5000 feet lowering to 4300 feet. High near 44. Windy, with a south southeast wind 25 to 30 mph, with gusts as high as 47 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain showers before 4am, then rain and snow showers likely between 4am and 5am, then rain showers likely after 5am. Snow level 4000 feet. Low around 32. South southeast wind 6 to 11 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Friday
Showers likely before 10am, then rain, mainly between 10am and 4pm. Snow level 3900 feet. High near 43. South southeast wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A 40 percent chance of rain before 10pm. Snow level 3600 feet lowering to 2700 feet after midnight . Mostly cloudy, with a low around 28. West wind 3 to 5 mph.
Saturday
Partly sunny, with a high near 39.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
Mostly sunny, with a high near 40.
Sunday Night
Mostly clear, with a low around 20.
Monday
Sunny, with a high near 44.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Sunny, with a high near 47.
Tuesday Night
Mostly clear, with a low around 25.
Wednesday
Sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles NNE Montague CA
 41.86°N 122.45°W (Elev. 2598 ft)
Last Update:
3:41 am PST Dec 25, 2025
Forecast Valid:
4am PST Dec 25, 2025-6pm PST Dec 31, 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