Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. 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 26%
Wind Speed N 4 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 04 Aug 09:05 AM PDT
Extended Forecast for

12 Miles NNE Montague CA

Heat Advisory August 4, 11:00am until August 6, 11:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Areas of smoke before 2pm. Sunny and hot, with a high near 104. Light and variable wind.

    High: 104 °F

    Areas Smoke

  • Tonight

    Tonight: Patchy smoke after 8pm. Clear, with a low around 63. North northwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 63 °F

    Patchy Smoke

  • Wednesday

    Wednesday: Sunny and hot, with a high near 105. Light and variable wind.

    High: 105 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64. West northwest wind around 6 mph becoming calm  in the evening.

    Low: 64 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 105. Light and variable wind.

    High: 105 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 103.

    High: 103 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

Detailed Forecast

Today
Areas of smoke before 2pm. Sunny and hot, with a high near 104. Light and variable wind.
Tonight
Patchy smoke after 8pm. Clear, with a low around 63. North northwest wind 5 to 8 mph becoming calm in the evening.
Wednesday
Sunny and hot, with a high near 105. Light and variable wind.
Wednesday Night
Clear, with a low around 64. West northwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 105. Light and variable wind.
Thursday Night
Clear, with a low around 65.
Friday
Sunny and hot, with a high near 103.
Friday Night
Clear, with a low around 63.
Saturday
Sunny and hot, with a high near 100.
Saturday Night
Clear, with a low around 60.
Sunday
Sunny, with a high near 95.
Sunday Night
Clear, with a low around 56.
Monday
Sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NNE Montague CA
 41.9°N 122.49°W (Elev. 2198 ft)
8:21 am PDT Aug 4, 2026
9am PDT Aug 4, 2026-6pm PDT Aug 10, 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