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

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125.0ft.

Clear

74°F

23°C

Humidity 22%
Wind Speed SW 4 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 18 Apr 01:53 PM PDT
Extended Forecast for

Guerneville CA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 74. Southwest wind around 5 mph.

    High: 74 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 68. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 68 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: A 40 percent chance of showers after 11pm.  Mostly cloudy, with a low around 49. Southwest wind around 5 mph becoming calm  in the evening.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Chance
    Showers

  • Monday

    Monday: Showers.  High near 62. Calm wind becoming south 5 to 7 mph in the morning.  Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 62 °F

    Showers

  • Monday Night

    Monday Night: Showers.  Low around 51. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 51 °F

    Showers

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after 11am.  Patchy fog before 8am. High near 62. Chance of precipitation is 90%.

    High: 62 °F

    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 11pm, then a chance of showers.  Mostly cloudy, with a low around 48.

    Low: 48 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers.  Partly sunny, with a high near 65.

    High: 65 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 74. Southwest wind around 5 mph.
Tonight
Mostly cloudy, with a low around 48. Calm wind.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 68. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
A 40 percent chance of showers after 11pm. Mostly cloudy, with a low around 49. Southwest wind around 5 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers. High near 62. Calm wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
Showers. Low around 51. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday
Showers, with thunderstorms also possible after 11am. Patchy fog before 8am. High near 62. Chance of precipitation is 90%.
Tuesday Night
Showers likely and possibly a thunderstorm before 11pm, then a chance of showers. Mostly cloudy, with a low around 48.
Wednesday
A chance of showers. Partly sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 72.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.52°N 122.98°W (Elev. 95 ft)
1:26 pm PDT Apr 18, 2026
2pm PDT Apr 18, 2026-6pm PDT Apr 24, 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