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

Heavy Rain Return to the Southwest U.S.; Potential Atlantic Tropical System Interaction

Heavy to excessive rainfall from monsoon thunderstorms may bring isolated flash and urban flooding to the Desert Southwest into Sunday. The tropical wave (AL94) continues to bring heavy rainfall to Puerto Rico and the US Virgin Islands. The close proximity of Tropical Storm Humberto and AL94 could lead to interaction between them, but details of their track and intensity forecasts remain uncertain Read More >

Current conditions at

Novato / Gnoss Field (KDVO)

Lat: 38.14178°NLon: 122.55463°WElev: 3.0ft.

Clear

N/A

Humidity NA
Wind Speed NNE 4 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint N/A
Visibility 10.00 mi
Last update NA
Extended Forecast for

Petaluma CA

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 78. Light west northwest wind becoming west 5 to 10 mph in the afternoon.

    High: 78 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 54. West wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. Calm wind becoming west around 6 mph in the afternoon.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 54. West wind 5 to 9 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of rain after 11pm. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Slight Chance
    Rain

  • Monday

    Monday: A chance of rain. Mostly cloudy, with a high near 72.

    High: 72 °F

    Chance Rain

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 78. Light west northwest wind becoming west 5 to 10 mph in the afternoon.
Tonight
Mostly clear, with a low around 54. West wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 87. Calm wind becoming west around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 54. West wind 5 to 9 mph becoming calm in the evening.
Saturday
Sunny, with a high near 80. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 55.
Sunday
Partly sunny, with a high near 72.
Sunday Night
A slight chance of rain after 11pm. Mostly cloudy, with a low around 56.
Monday
A chance of rain. Mostly cloudy, with a high near 72.
Monday Night
A chance of rain. Mostly cloudy, with a low around 56.
Tuesday
A chance of rain. Mostly cloudy, with a high near 70.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 52.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Petaluma CA
 38.23°N 122.65°W (Elev. 98 ft)
Last Update:
5:48 am PDT Sep 25, 2025
Forecast Valid:
8am PDT Sep 25, 2025-6pm PDT Oct 1, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation