Above Average Temperatures for Most Today; Winter Weather Returns to the Upper Midwest and Great Lakes

Well above average temperatures are forecast today into Wednesday over most of the lower 48 states away from the Gulf Coast. A storm system passing across southern Canada will bring a wintry mix to the upper Great Lakes today. A trailing cold front will then bring the wintry mix from the central Appalachians through the Northeast U.S. Wednesday and Thursday. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10375°NLon: 123.68508°WElev: 1389.0ft.

NA

33°F

1°C

Humidity 98%
Wind Speed E 1 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 13 Jan 11:52 AM PST
Extended Forecast for

9 Miles WNW Illinois Valley OR

Air Stagnation Advisory January 13, 12:43pm until January 16, 10:00am
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory January 13, 12:43pm until January 16, 10:00am

    NOW until 10:00am Fri

    Air Stagnation Advisory

  • This Afternoon

    High: 59 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 45. East wind around 8 mph.

    Low: 45 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 56. East northeast wind around 11 mph.

    High: 56 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 42. East northeast wind around 16 mph, with gusts as high as 24 mph.

    Low: 42 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 56. East northeast wind 14 to 17 mph, with gusts as high as 26 mph.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 39.

    Low: 39 °F

    Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 59. South southeast wind around 6 mph.
Tonight
Clear, with a low around 45. East wind around 8 mph.
Wednesday
Sunny, with a high near 56. East northeast wind around 11 mph.
Wednesday Night
Clear, with a low around 42. East northeast wind around 16 mph, with gusts as high as 24 mph.
Thursday
Sunny, with a high near 56. East northeast wind 14 to 17 mph, with gusts as high as 26 mph.
Thursday Night
Clear, with a low around 40.
Friday
Sunny, with a high near 56.
Friday Night
Clear, with a low around 39.
Saturday
Sunny, with a high near 57.
Saturday Night
Clear, with a low around 40.
Sunday
Sunny, with a high near 55.
Sunday Night
Mostly clear, with a low around 40.
M.L.King Day
Sunny, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WNW Illinois Valley OR
 42.15°N 123.85°W (Elev. 3356 ft)
3:41 am PST Jan 13, 2026
12pm PST Jan 13, 2026-6pm PST Jan 19, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database