National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Arctic Front Brings Winter Weather and Colder Temperatures to the Eastern U.S.

A series of cold fronts will bring heavy lake effect snow to the northern Great Lakes. The fronts will merge over the Ohio Valley and bring colder temperatures east of the Mississippi River later today into the end of the week. Additionally, wintry weather will develop over the Ohio Valley, Appalachians, and Northeast as rain switches over to snow tonight into Thursday morning. Read More >

Hazardous Weather Conditions

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

36°F

2°C

Humidity 98%
Wind Speed E 1 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 14 Jan 01:52 PM PST
Extended Forecast for

Illinois Valley OR

Air Stagnation Advisory January 14, 02:41pm until January 20, 10:00am
Freezing Fog Advisory January 14, 10:00pm until January 15, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
Freezing Fog Advisory
  •  
    Air Stagnation Advisory January 14, 02:41pm until January 20, 10:00am

    NOW until 10:00am Tue

    Air Stagnation Advisory

  • This Afternoon

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Widespread fog between 7pm and 1am. Widespread freezing fog after 1am. Otherwise, mostly clear, with a low around 30. North wind around 7 mph.

    Low: 30 °F

    Freezing Fog
    and Fog

  • Thursday

    Thursday: Widespread dense fog between 10am and 1pm. Widespread freezing fog before 10am. Otherwise, sunny, with a high near 46. North wind 5 to 7 mph.

    High: 46 °F

    Freezing Fog
    and Dense Fog

  • Thursday Night

    Thursday Night: Patchy freezing fog. Clear, with a low around 30. North wind around 5 mph becoming calm in the evening.

    Low: 30 °F

    Patchy
    Freezing Fog

  • Friday

    Friday: Patchy freezing fog before 10am. Sunny, with a high near 48. Calm wind.

    High: 48 °F

    Patchy
    Freezing Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 10pm. Otherwise, clear, with a low around 30.

    Low: 30 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 10am. Otherwise, sunny, with a high near 52.

    High: 52 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 10pm. Otherwise, mostly clear, with a low around 30.

    Low: 30 °F

    Patchy Fog

Detailed Forecast

This Afternoon
Sunny, with a high near 54. Light north northeast wind.
Tonight
Widespread fog between 7pm and 1am. Widespread freezing fog after 1am. Otherwise, mostly clear, with a low around 30. North wind around 7 mph.
Thursday
Widespread dense fog between 10am and 1pm. Widespread freezing fog before 10am. Otherwise, sunny, with a high near 46. North wind 5 to 7 mph.
Thursday Night
Patchy freezing fog. Clear, with a low around 30. North wind around 5 mph becoming calm in the evening.
Friday
Patchy freezing fog before 10am. Sunny, with a high near 48. Calm wind.
Friday Night
Patchy fog after 10pm. Otherwise, clear, with a low around 30.
Saturday
Patchy fog before 10am. Otherwise, sunny, with a high near 52.
Saturday Night
Patchy fog after 10pm. Otherwise, mostly clear, with a low around 30.
Sunday
Patchy fog before 10am. Otherwise, sunny, with a high near 43.
Sunday Night
Patchy fog. Otherwise, mostly clear, with a low around 27.
M.L.King Day
Patchy fog. Otherwise, sunny, with a high near 51.
Monday Night
Patchy fog. Otherwise, mostly clear, with a low around 27.
Tuesday
Patchy fog. Otherwise, sunny, with a high near 43.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Illinois Valley OR
 42.09°N 123.68°W (Elev. 1394 ft)
Last Update:
2:21 pm PST Jan 14, 2026
Forecast Valid:
2pm PST Jan 14, 2026-6pm PST Jan 20, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation