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

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10386°NLon: 123.68519°WElev: 1389.0ft.

NA

93°F

34°C

Humidity 19%
Wind Speed ESE 5 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Heat Index89°F (32°C)
Last update 04 Aug 12:52 PM PDT
Extended Forecast for

12 Miles SSE Agness OR

Heat Advisory until August 6, 11:00pm
Red Flag Warning August 4, 01:44pm until August 4, 09:00pm
Red Flag Warning August 5, 02:00pm until August 5, 09:00pm
Click here for hazard details and duration
Heat Advisory
Red Flag Warning
Red Flag Warning
  •  
    Heat Advisory until August 6, 11:00pm
    Red Flag Warning August 4, 01:44pm until August 4, 09:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • This Afternoon

    High: 92 °F

    Patchy Smoke

  • Tonight

    Tonight: Areas of smoke. Clear, with a low around 65. Northwest wind around 7 mph becoming east northeast after midnight.

    Low: 65 °F

    Areas Smoke

  • Wednesday

    Wednesday: Areas of smoke. Sunny, with a high near 87. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 87 °F

    Areas Smoke

  • Wednesday Night

    Wednesday Night: Patchy smoke. Mostly clear, with a low around 64. West southwest wind 5 to 7 mph becoming light and variable  in the evening.

    Low: 64 °F

    Patchy Smoke

  • Thursday

    Thursday: Sunny, with a high near 86. Light and variable wind becoming west 5 to 7 mph in the afternoon.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

Detailed Forecast

This Afternoon
Patchy smoke. Sunny, with a high near 92. North northeast wind 5 to 8 mph becoming west northwest.
Tonight
Areas of smoke. Clear, with a low around 65. Northwest wind around 7 mph becoming east northeast after midnight.
Wednesday
Areas of smoke. Sunny, with a high near 87. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Wednesday Night
Patchy smoke. Mostly clear, with a low around 64. West southwest wind 5 to 7 mph becoming light and variable in the evening.
Thursday
Sunny, with a high near 86. Light and variable wind becoming west 5 to 7 mph in the afternoon.
Thursday Night
Clear, with a low around 63.
Friday
Sunny, with a high near 89.
Friday Night
Clear, with a low around 63.
Saturday
Sunny, with a high near 82.
Saturday Night
Clear, with a low around 59.
Sunday
Sunny, with a high near 76.
Sunday Night
Clear, with a low around 58.
Monday
Sunny, with a high near 75.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles SSE Agness OR
 42.4°N 123.98°W (Elev. 2628 ft)
1:01 pm PDT Aug 4, 2026
1pm 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