Heat Persists in the South Central U.S. and Southwest; Heavy rains in the Desert Southwest and Central Plains

Sweltering heat remains across the South-Central Plains, Lower/Middle Mississippi Valley, and the Southwest this week with limited nighttime relief. Thunderstorms will bring heavy rainfall leading to localized flash flooding in portions of the Desert Southwest and central Plains. Isolated strong to severe thunderstorms are possible across portions of the central Plains into the Northeast. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

48°F

9°C

Humidity 96%
Wind Speed SSW 0 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 09 Sep 03:52 AM PDT
Extended Forecast for

Illinois Valley OR

  • Today

    Today: Sunny and hot, with a high near 99. North wind around 5 mph becoming calm  in the morning.

    High: 99 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 55. Calm wind becoming north around 5 mph.

    Low: 55 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 93. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 93 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. Northwest wind 5 to 7 mph becoming light and variable  after midnight.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am.  Mostly cloudy, with a high near 64. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A slight chance of rain before 11pm.  Partly cloudy, with a low around 40.

    Low: 40 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

Today
Sunny and hot, with a high near 99. North wind around 5 mph becoming calm in the morning.
Tonight
Clear, with a low around 55. Calm wind becoming north around 5 mph.
Thursday
Sunny, with a high near 93. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 54. Northwest wind 5 to 7 mph becoming light and variable after midnight.
Friday
Sunny, with a high near 82. Calm wind becoming west 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 43.
Saturday
Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 64. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A slight chance of rain before 11pm. Partly cloudy, with a low around 40.
Sunday
Sunny, with a high near 74.
Sunday Night
Clear, with a low around 43.
Monday
Sunny, with a high near 81.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
Illinois Valley OR
 42.11°N 123.69°W (Elev. 1398 ft)
11:46 pm PDT Sep 8, 2026
4am PDT Sep 9, 2026-6pm PDT Sep 15, 2026
 
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