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 >

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Clear

34°F

1°C

Humidity 96%
Wind Speed S 6 MPH
Barometer 29.65 in (1004.06 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 26 Dec 12:53 AM PST
Extended Forecast for

10 Miles NNE Montague CA

  • Overnight

    Overnight: A slight chance of rain before 3am, then rain likely, possibly mixed with snow.  Snow level 3900 feet. Mostly cloudy, with a low around 31. South wind around 11 mph, with gusts as high as 18 mph.  Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 31 °F

    Rain/Snow
    Likely

  • Friday

    Friday: Rain.  Snow level 3900 feet. High near 44. South wind 8 to 17 mph, with gusts as high as 26 mph.  Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 44 °F

    Rain

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly before 7pm.  Snow level 3600 feet lowering to 2800 feet after midnight . Mostly cloudy, with a low around 27. North wind 5 to 8 mph becoming west after midnight.

    Low: 27 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 39. North northwest wind 5 to 8 mph becoming west in the morning.

    High: 39 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 19. Calm wind.

    Low: 19 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 43.

    High: 43 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Overnight
A slight chance of rain before 3am, then rain likely, possibly mixed with snow. Snow level 3900 feet. Mostly cloudy, with a low around 31. South wind around 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Friday
Rain. Snow level 3900 feet. High near 44. South wind 8 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A 30 percent chance of rain, mainly before 7pm. Snow level 3600 feet lowering to 2800 feet after midnight . Mostly cloudy, with a low around 27. North wind 5 to 8 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 39. North northwest wind 5 to 8 mph becoming west in the morning.
Saturday Night
Mostly cloudy, with a low around 19. Calm wind.
Sunday
Mostly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 19.
Monday
Sunny, with a high near 43.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 47.
Tuesday Night
Partly cloudy, with a low around 25.
Wednesday
Mostly sunny, with a high near 48.
Wednesday Night
A slight chance of rain. Snow level 6300 feet lowering to 5400 feet after midnight . Mostly cloudy, with a low around 27.
New Year's Day
A chance of rain. Snow level 4800 feet. Mostly cloudy, with a high near 47.
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles NNE Montague CA
 41.86°N 122.45°W (Elev. 2598 ft)
12:41 am PST Dec 26, 2025
1am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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