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

Heat Wave Continues in the West; Critical Fire Weather Conditions in the High Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Clear

79°F

26°C

Humidity 22%
Wind Speed N 0 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 17 Mar 05:20 PM PDT
Extended Forecast for

Montague CA

  • Tonight

    Tonight: Clear, with a low around 38. Light east northeast wind.

    Low: 38 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 40. West southwest wind around 6 mph becoming calm in the evening.

    Low: 40 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 80. Light and variable wind.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45. West wind around 6 mph becoming calm in the evening.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 38. Light east northeast wind.
Wednesday
Sunny, with a high near 80. Calm wind becoming south southeast around 5 mph in the afternoon.
Wednesday Night
Clear, with a low around 40. West southwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 80. Light and variable wind.
Thursday Night
Mostly clear, with a low around 45. West wind around 6 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 45.
Saturday
Partly sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 34.
Sunday
Mostly sunny, with a high near 66.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Mostly sunny, with a high near 69.
Monday Night
A slight chance of rain. Mostly cloudy, with a low around 41.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Montague CA
 41.72°N 122.53°W (Elev. 2598 ft)
Last Update:
4:41 pm PDT Mar 17, 2026
Forecast Valid:
5pm PDT Mar 17, 2026-6pm PDT Mar 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation