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

Frigid Airmass to Bring Significantly Colder Temperatures; Snow Continues Downwind of the Great Lakes

A frigid cold airmass will bring significantly colder weather across the eastern two thirds of the country early this week. Record low temperatures are expected in the Southeast by Tuesday morning. Moderate to heavy lake effect snow will continue downwind of the Great Lakes through Monday. Several inches of snow accumulation is expected, including in portions of the Chicago Metro Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Clear

48°F

9°C

Humidity 87%
Wind Speed NE 3 MPH
Barometer 30.28 in (1025.4 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 09 Nov 07:00 PM PST
Extended Forecast for

Montague CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 69. Calm wind.

    High: 69 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39. Calm wind.

    Low: 39 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 66. Calm wind.

    High: 66 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. South southeast wind 6 to 10 mph.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely after 4pm. Mostly cloudy, with a high near 63. Breezy. Chance of precipitation is 60%.

    High: 63 °F

    Breezy.
    Mostly Cloudy
    then Rain
    Likely

  • Wednesday Night

    Wednesday Night: Rain. Low around 39. Breezy. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain and
    Breezy

  • Thursday

    Thursday: Rain. Snow level 6400 feet lowering to 5400 feet in the afternoon . Cloudy, with a high near 50.

    High: 50 °F

    Rain

  • Thursday Night

    Thursday Night: A chance of rain. Snow level 4500 feet. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly cloudy, with a low around 40. Calm wind.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 69. Calm wind.
Monday Night
Partly cloudy, with a low around 39. Calm wind.
Veterans Day
Partly sunny, with a high near 66. Calm wind.
Tuesday Night
Mostly cloudy, with a low around 42. South southeast wind 6 to 10 mph.
Wednesday
Rain likely after 4pm. Mostly cloudy, with a high near 63. Breezy. Chance of precipitation is 60%.
Wednesday Night
Rain. Low around 39. Breezy. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Rain. Snow level 6400 feet lowering to 5400 feet in the afternoon . Cloudy, with a high near 50.
Thursday Night
A chance of rain. Snow level 4500 feet. Mostly cloudy, with a low around 32.
Friday
A chance of rain. Snow level 4100 feet rising to 4900 feet in the afternoon. Mostly cloudy, with a high near 48.
Friday Night
A chance of rain. Snow level 5500 feet. Mostly cloudy, with a low around 34.
Saturday
A chance of rain. Mostly cloudy, with a high near 51.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 35.
Sunday
Rain likely. Snow level 5500 feet. Mostly cloudy, with a high near 50.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Montague CA
 41.72°N 122.53°W (Elev. 2598 ft)
Last Update:
2:21 pm PST Nov 9, 2025
Forecast Valid:
7pm PST Nov 9, 2025-6pm PST Nov 16, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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