Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Berkeley Lab (LBNL1)

Lat: 37.8771°NLon: 122.2486°WElev: 888.0ft.

NA

41°F

5°C

Humidity 93%
Wind Speed NW 0 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 08 Dec 03:45 AM PST
Extended Forecast for

Hercules CA

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 57. East northeast wind 3 to 5 mph.

    High: 57 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Patchy fog after 9pm.  Otherwise, partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 58. East northeast wind around 5 mph.

    High: 58 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog.  Otherwise, partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Patchy Fog

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. Northeast wind 3 to 5 mph.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 10pm.  Otherwise, mostly clear, with a low around 46.

    Low: 46 °F

    Patchy Fog

  • Thursday

    Thursday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 57. East northeast wind 3 to 5 mph.
Tonight
Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 44. Calm wind.
Tuesday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 58. East northeast wind around 5 mph.
Tuesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 46. Calm wind.
Wednesday
Mostly sunny, with a high near 61. Northeast wind 3 to 5 mph.
Wednesday Night
Patchy fog after 10pm. Otherwise, mostly clear, with a low around 46.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Mostly clear, with a low around 45.
Friday
Mostly sunny, with a high near 60.
Friday Night
Mostly clear, with a low around 44.
Saturday
Mostly sunny, with a high near 60.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 47.
Sunday
Partly sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
Hercules CA
 38.02°N 122.27°W (Elev. 92 ft)
2:09 am PST Dec 8, 2025
4am PST Dec 8, 2025-6pm PST Dec 14, 2025
 
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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