Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Clear

72°F

22°C

Humidity 33%
Wind Speed N 5 MPH
Barometer 30.16 in (1021.34 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 20 Mar 01:35 PM PDT
Extended Forecast for

4 Miles NE Montague CA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. Calm wind becoming north around 5 mph.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 45. North wind 5 to 7 mph becoming light and variable  in the evening.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 67. Light north wind increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 67 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Widespread frost, mainly after 2am.  Otherwise, mostly clear, with a low around 29. North wind 12 to 17 mph becoming light  after midnight. Winds could gust as high as 26 mph.

    Low: 29 °F

    Frost

  • Sunday

    Sunday: Widespread frost before 11am.  Otherwise, mostly sunny, with a high near 68. Light north northwest wind.

    High: 68 °F

    Frost then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Areas of frost after 5am.  Otherwise, partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy
    then Areas
    Frost

  • Monday

    Monday: Areas of frost before 8am.  Otherwise, mostly sunny, with a high near 73.

    High: 73 °F

    Areas Frost
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. Calm wind becoming north around 5 mph.
Tonight
Partly cloudy, with a low around 45. North wind 5 to 7 mph becoming light and variable in the evening.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 67. Light north wind increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
Widespread frost, mainly after 2am. Otherwise, mostly clear, with a low around 29. North wind 12 to 17 mph becoming light after midnight. Winds could gust as high as 26 mph.
Sunday
Widespread frost before 11am. Otherwise, mostly sunny, with a high near 68. Light north northwest wind.
Sunday Night
Areas of frost after 5am. Otherwise, partly cloudy, with a low around 36.
Monday
Areas of frost before 8am. Otherwise, mostly sunny, with a high near 73.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Mostly sunny, with a high near 65.
Wednesday Night
Partly cloudy, with a low around 30.
Thursday
Sunny, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NE Montague CA
 41.77°N 122.48°W (Elev. 2612 ft)
1:41 pm PDT Mar 20, 2026
1pm PDT Mar 20, 2026-6pm PDT Mar 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database