Early Spring Heat Wave in the Southwest U.S.; Critical Fire Weather in the Central Rockies and Plains

An unusual early Spring heat wave will continue much above-normal temperatures over the Southwest U.S. through early next week. Periods of critical fire weather will persist from the central Rockies to the central Plains through the weekend as gusty winds and low relative humidity continue. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

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

Clear

42°F

6°C

Humidity 75%
Wind Speed N 0 MPH
Barometer 30.24 in (1024.04 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 20 Mar 01:53 AM PDT
Extended Forecast for

Montague CA

  • Overnight

    Overnight: Mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny during the morning, then sunny during the afternoon, with a high near 80. Calm wind becoming northwest 5 to 7 mph in the afternoon.

    High: 80 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 45. North wind 5 to 7 mph becoming calm  in the evening.

    Low: 45 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 69. Light north wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 23 mph.

    High: 69 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 28. North wind 12 to 17 mph becoming light  after midnight. Winds could gust as high as 26 mph.

    Low: 28 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 38. Calm wind.
Friday
Partly sunny during the morning, then sunny during the afternoon, with a high near 80. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Friday Night
Increasing clouds, with a low around 45. North wind 5 to 7 mph becoming calm in the evening.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 69. Light north wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
Mostly clear, with a low around 28. North wind 12 to 17 mph becoming light after midnight. Winds could gust as high as 26 mph.
Sunday
Sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 36.
Monday
Partly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
Mostly sunny, with a high near 73.
Tuesday Night
A slight chance of rain. Partly cloudy, with a low around 39.
Wednesday
Mostly sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 32.
Thursday
Sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
Montague CA
 41.74°N 122.53°W (Elev. 2589 ft)
1:31 am PDT Mar 20, 2026
2am PDT Mar 20, 2026-6pm PDT Mar 26, 2026
 
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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