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

Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

73°F

23°C

Humidity 23%
Wind Speed NW 8 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 18 May 08:00 PM PDT
Extended Forecast for

Monte Rio CA

Coastal Flood Advisory May 18, 08:22pm until May 19, 03:00am
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory May 18, 08:22pm until May 19, 03:00am

    NOW until 3:00am Tue

    Coastal Flood Advisory

  • Tonight

    Low: 55 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 55. West northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 81 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53. West southwest wind around 6 mph becoming calm in the evening.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Tonight
Clear, with a low around 55. Northwest wind 5 to 7 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 86. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Increasing clouds, with a low around 55. West northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 53. West southwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 52.
Friday
Mostly sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
Partly cloudy, with a low around 50.
Sunday
Mostly sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 51.
Memorial Day
Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Monte Rio CA
 38.47°N 123°W (Elev. 525 ft)
Last Update:
1:26 pm PDT May 18, 2026
Forecast Valid:
8pm PDT May 18, 2026-6pm PDT May 25, 2026
 
Forecast Discussion
 
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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