Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, 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 20%
Wind Speed SW 6 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Heat Index88°F (31°C)
Last update 18 Aug 06:52 PM PDT
Extended Forecast for

3 Miles SSE Illinois Valley OR

  • Tonight

    Tonight: Mostly clear, with a low around 53. North northeast wind 5 to 9 mph becoming calm  after midnight.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53. Southwest wind 5 to 9 mph becoming calm  in the evening.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Calm wind becoming west around 6 mph in the afternoon.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50. West wind 5 to 7 mph becoming calm  in the evening.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 53. North northeast wind 5 to 9 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 94. Calm wind becoming west 5 to 7 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 53. Southwest wind 5 to 9 mph becoming calm in the evening.
Thursday
Sunny, with a high near 91. Calm wind becoming west around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 50. West wind 5 to 7 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 83.
Saturday Night
Clear, with a low around 46.
Sunday
Sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 50.
Monday
Sunny, with a high near 89.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Illinois Valley OR
 42.05°N 123.64°W (Elev. 1801 ft)
4:40 pm PDT Aug 18, 2026
7pm PDT Aug 18, 2026-6pm PDT Aug 25, 2026
 
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Additional Resources

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