Cold Temperatures for the Eastern U.S.; Lake Effect Snow in the Great Lakes; Heavy Rain in the Pacific Northwest

Cold temperatures will continue across much of the eastern U.S. into today. Heavy lake effect snow continues into today east of Lakes Erie and Ontario. Two Pacific cold fronts will cross the Pacific Northwest early this week followed by another atmospheric river. Heavy rain and gusty winds are expected through midweek, with the potential for renewed urban and river flooding. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

50°F

10°C

Humidity 98%
Wind Speed ENE 1 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Last update 15 Dec 02:52 PM PST
Extended Forecast for

4 Miles S Agness OR

  • This Afternoon

    This Afternoon: Rain and possibly a thunderstorm.  High near 55. South southwest wind around 11 mph.  Chance of precipitation is 100%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 55 °F

    Rain

  • Tonight

    Tonight: Rain and possibly a thunderstorm before 7pm, then rain likely.  Low around 53. South southeast wind 3 to 6 mph.  Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Rain then
    Chance Rain

  • Tuesday

    Tuesday: Rain, mainly after 10am.  High near 56. Light south southeast wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 23 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain.  Low around 42. West southwest wind 11 to 17 mph, with gusts as high as 26 mph.  Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 42 °F

    Rain

  • Wednesday

    Wednesday: Rain, mainly before 10am.  Snow level 3900 feet. High near 52. West southwest wind 5 to 7 mph.  Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °F

    Rain then
    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain, mainly after 10pm.  Snow level 4100 feet rising to 6500 feet after midnight. Low around 47. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Rain

  • Thursday

    Thursday: Rain.  High near 55. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 55 °F

    Rain

  • Thursday Night

    Thursday Night: Rain.  Cloudy, with a low around 51.

    Low: 51 °F

    Rain

  • Friday

    Friday: Rain.  Cloudy, with a high near 51.

    High: 51 °F

    Rain

Detailed Forecast

This Afternoon
Rain and possibly a thunderstorm. High near 55. South southwest wind around 11 mph. Chance of precipitation is 100%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and possibly a thunderstorm before 7pm, then rain likely. Low around 53. South southeast wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Rain, mainly after 10am. High near 56. Light south southeast wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain. Low around 42. West southwest wind 11 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Wednesday
Rain, mainly before 10am. Snow level 3900 feet. High near 52. West southwest wind 5 to 7 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain, mainly after 10pm. Snow level 4100 feet rising to 6500 feet after midnight. Low around 47. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Rain. High near 55. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday Night
Rain. Cloudy, with a low around 51.
Friday
Rain. Cloudy, with a high near 51.
Friday Night
Rain likely, mainly before 10pm. Snow level 5000 feet lowering to 4400 feet after midnight . Mostly cloudy, with a low around 40.
Saturday
A chance of rain. Snow level 4400 feet. Mostly cloudy, with a high near 47.
Saturday Night
Rain likely. Snow level 4900 feet. Mostly cloudy, with a low around 43.
Sunday
Rain. Mostly cloudy, with a high near 52.
Sunday Night
Rain. Cloudy, with a low around 47.
Monday
Rain. Cloudy, with a high near 51.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Agness OR
 42.48°N 124.06°W (Elev. 1929 ft)
2:21 pm PST Dec 15, 2025
3pm PST Dec 15, 2025-6pm PST Dec 22, 2025
 
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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