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

Tropical Moisture Brings Slight Risk of Excessive Rainfall to the Southwest; Strong to Locally Severe Storms on the Plains

Heavy rain and flash flooding are possible across portions of the Southwest through Friday, where Flood Watches are in effect. Strong to locally severe thunderstorms are possible today across portions of the Plains. A tropical wave is causing heavy rainfall in Puerto Rico and the Virgin Islands, which may cause urban and small stream flooding and landslides today. Read More >

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 49%
Wind Speed S 11 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Sep 03:05 PM PDT
Extended Forecast for

Calistoga CA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 86. Southwest wind around 6 mph.

    High: 86 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 11am. Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 80. Light and variable wind.

    High: 80 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 55. South southwest wind around 6 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Areas of fog before 9am. Otherwise, sunny, with a high near 82. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 82 °F

    Areas Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, sunny, with a high near 87.

    High: 87 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 86. Southwest wind around 6 mph.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 20 percent chance of showers before 11am. Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 80. Light and variable wind.
Friday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 55. South southwest wind around 6 mph becoming calm in the evening.
Saturday
Areas of fog before 9am. Otherwise, sunny, with a high near 82. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Patchy fog before 9am. Otherwise, sunny, with a high near 87.
Sunday Night
Clear, with a low around 60.
Monday
Sunny, with a high near 92.
Monday Night
Mostly clear, with a low around 59.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 83.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 57.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 78.
Wednesday Night
Patchy fog. Otherwise, mostly clear, with a low around 55.
Thursday
Patchy fog. Otherwise, sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Calistoga CA
 38.58°N 122.59°W (Elev. 525 ft)
Last Update:
1:26 pm PDT Sep 18, 2025
Forecast Valid:
3pm PDT Sep 18, 2025-6pm PDT Sep 25, 2025
 
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Additional Resources

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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