Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

92°F

33°C

Humidity 24%
Wind Speed SSW 7 MPH
Barometer NA
Dewpoint 50°F (10°C)
Visibility NA
Heat Index89°F (32°C)
Last update 19 Aug 06:52 PM PDT
Extended Forecast for

17 Miles WNW Illinois Valley OR

  • Tonight

    Tonight: Mostly clear, with a low around 60. West wind around 6 mph becoming calm  after midnight.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 72. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57. West southwest wind around 6 mph becoming calm  in the evening.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 65. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.

    High: 65 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 50. West southwest wind 5 to 10 mph becoming light west  in the evening.

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 60. West wind around 6 mph becoming calm after midnight.
Thursday
Sunny, with a high near 72. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 57. West southwest wind around 6 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 65. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 50. West southwest wind 5 to 10 mph becoming light west in the evening.
Saturday
Sunny, with a high near 63.
Saturday Night
Clear, with a low around 52.
Sunday
Sunny, with a high near 75.
Sunday Night
Mostly clear, with a low around 59.
Monday
Mostly sunny, with a high near 72.
Monday Night
Mostly clear, with a low around 58.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles WNW Illinois Valley OR
 42.2°N 123.98°W (Elev. 3786 ft)
4:40 pm PDT Aug 19, 2026
7pm PDT Aug 19, 2026-6pm PDT Aug 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database