Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

63°F

17°C

Humidity 32%
Wind Speed SSW 4 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 18 Apr 07:52 PM PDT
Extended Forecast for

9 Miles WNW Illinois Valley OR

  • Tonight

    Tonight: Mostly cloudy, with a low around 46. South wind 3 to 8 mph.

    Low: 46 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 57. Southeast wind 5 to 10 mph becoming west southwest in the afternoon.

    High: 57 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 40 percent chance of rain, mainly after 11pm.  Mostly cloudy, with a low around 45. West southwest wind 6 to 9 mph becoming northeast after midnight.

    Low: 45 °F

    Chance Rain

  • Monday

    Monday: Rain, mainly after 11am.  Snow level 6400 feet. High near 50. East wind 6 to 10 mph becoming southwest in the afternoon.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 50 °F

    Rain

  • Monday Night

    Monday Night: Rain.  Snow level 6600 feet lowering to 5900 feet after midnight . Low around 42. West wind 5 to 9 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Rain

  • Tuesday

    Tuesday: Rain before 11am, then showers and possibly a thunderstorm after 11am.  Snow level 5500 feet. High near 47. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 47 °F

    Showers

  • Tuesday Night

    Tuesday Night: Rain.  Snow level 5400 feet lowering to 4800 feet after midnight . Low around 40. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Rain

  • Wednesday

    Wednesday: Rain.  Snow level 4700 feet. Cloudy, with a high near 43.

    High: 43 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 5am, then a chance of rain and snow.  Snow level 4800 feet lowering to 4100 feet after midnight . Mostly cloudy, with a low around 38.

    Low: 38 °F

    Rain Likely
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 46. South wind 3 to 8 mph.
Sunday
Mostly cloudy, with a high near 57. Southeast wind 5 to 10 mph becoming west southwest in the afternoon.
Sunday Night
A 40 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 45. West southwest wind 6 to 9 mph becoming northeast after midnight.
Monday
Rain, mainly after 11am. Snow level 6400 feet. High near 50. East wind 6 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
Rain. Snow level 6600 feet lowering to 5900 feet after midnight . Low around 42. West wind 5 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Rain before 11am, then showers and possibly a thunderstorm after 11am. Snow level 5500 feet. High near 47. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Rain. Snow level 5400 feet lowering to 4800 feet after midnight . Low around 40. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Rain. Snow level 4700 feet. Cloudy, with a high near 43.
Wednesday Night
Rain likely before 5am, then a chance of rain and snow. Snow level 4800 feet lowering to 4100 feet after midnight . Mostly cloudy, with a low around 38.
Thursday
A chance of rain and snow before 8am, then a chance of rain. Snow level 3900 feet rising to 5100 feet in the afternoon. Partly sunny, with a high near 51.
Thursday Night
A slight chance of rain. Snow level 5400 feet. Mostly clear, with a low around 39.
Friday
A slight chance of rain. Snow level 5300 feet rising to 6200 feet in the afternoon. Sunny, with a high near 58.
Friday Night
Mostly clear, with a low around 41.
Saturday
A slight chance of rain. Snow level 6100 feet rising to 6600 feet in the afternoon. Mostly sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WNW Illinois Valley OR
 42.15°N 123.85°W (Elev. 3356 ft)
4:41 pm PDT Apr 18, 2026
8pm PDT Apr 18, 2026-6pm PDT Apr 25, 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