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

44°F

7°C

Humidity 86%
Wind Speed ESE 3 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 07 Dec 11:30 PM PST
Extended Forecast for

Hercules CA

  • Overnight

    Overnight: Patchy fog before 1am.  Otherwise, partly cloudy, with a low around 42. Light east wind.

    Low: 42 °F

    Patchy Fog

  • Monday

    Monday: Mostly sunny, with a high near 57. East northeast wind 3 to 5 mph.

    High: 57 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Patchy fog after 9pm.  Otherwise, partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Patchy Fog

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. East northeast wind around 6 mph.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog.  Otherwise, partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Patchy Fog

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 9pm.  Otherwise, mostly clear, with a low around 45.

    Low: 45 °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 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog before 1am. Otherwise, partly cloudy, with a low around 42. Light east wind.
Monday
Mostly sunny, with a high near 57. East northeast wind 3 to 5 mph.
Monday Night
Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 43. Calm wind.
Tuesday
Mostly sunny, with a high near 58. East northeast wind around 6 mph.
Tuesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 45. Calm wind.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
Patchy fog after 9pm. Otherwise, mostly clear, with a low around 45.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Mostly clear, with a low around 44.
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
Partly cloudy, with a low around 46.
Sunday
Partly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Hercules CA
 38°N 122.27°W (Elev. 377 ft)
11:01 pm PST Dec 7, 2025
12am PST Dec 8, 2025-6pm PST Dec 14, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database