Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Rain

48°F

9°C

Humidity 93%
Wind Speed S 6 MPH
Barometer 29.72 in (1006.44 mb)
Dewpoint 46°F (8°C)
Visibility 8.00 mi
Wind Chill45°F (7°C)
Last update 11 Apr 09:00 PM PDT
Extended Forecast for

Guerneville CA

  • Overnight

    Overnight: Showers and possibly a thunderstorm.  Low around 46. Southwest wind around 5 mph.  Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm before 2pm, then showers likely.  High near 59. West southwest wind 6 to 8 mph, with gusts as high as 20 mph.  Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 59 °F

    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers before 7pm.  Patchy fog after 3am.  Otherwise, partly cloudy, with a low around 42. West wind around 6 mph becoming calm  in the evening.

    Low: 42 °F

    Slight Chance
    Showers then
    Patchy Fog

  • Monday

    Monday: Patchy fog before 8am.  Otherwise, sunny, with a high near 65. Calm wind becoming west around 6 mph in the afternoon.

    High: 65 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44. Northwest wind 3 to 7 mph.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 46. Southwest wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and possibly a thunderstorm before 2pm, then showers likely. High near 59. West southwest wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 20 percent chance of showers before 7pm. Patchy fog after 3am. Otherwise, partly cloudy, with a low around 42. West wind around 6 mph becoming calm in the evening.
Monday
Patchy fog before 8am. Otherwise, sunny, with a high near 65. Calm wind becoming west around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 44. Northwest wind 3 to 7 mph.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Mostly sunny, with a high near 67.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Sunny, with a high near 70.
Thursday Night
Clear, with a low around 44.
Friday
Sunny, with a high near 72.
Friday Night
Mostly clear, with a low around 45.
Saturday
Mostly sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.5°N 122.98°W (Elev. 397 ft)
1:25 am PDT Apr 12, 2026
4am PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database