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

Late January Extreme Cold; Watching East Coast Storm Threat This Weekend

The next blast of Arctic air surges south down the Plains, across the Great Lakes and through the Southeast and East Friday through Saturday. This could be longest duration of cold in several decades. Forecast models are being closely monitored for potential of another significant winter storm to impact the eastern United States this coming weekend. Confidence in coastal impacts has increased. Read More >

Current conditions at

Berkeley Lab (LBNL1)

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

NA

55°F

13°C

Humidity 72%
Wind Speed SE 3 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 27 Jan 06:00 PM PST
Extended Forecast for

Hercules CA

  • Tonight

    Tonight: Rain likely, mainly before 10pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 50. South wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Rain Likely
    and Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 59. Light and variable wind becoming east northeast 5 to 7 mph in the morning.

    High: 59 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45. North wind 3 to 5 mph.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 60. Northeast wind 3 to 6 mph.

    High: 60 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain after 4am. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Tonight
Rain likely, mainly before 10pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 50. South wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 59. Light and variable wind becoming east northeast 5 to 7 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 45. North wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 60. Northeast wind 3 to 6 mph.
Thursday Night
Mostly cloudy, with a low around 45. Calm wind.
Friday
Partly sunny, with a high near 61.
Friday Night
Mostly cloudy, with a low around 46.
Saturday
Partly sunny, with a high near 61.
Saturday Night
A slight chance of rain after 4am. Mostly cloudy, with a low around 47.
Sunday
A chance of rain, mainly after 10am. Mostly cloudy, with a high near 60.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 49.
Monday
Mostly sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 46.
Tuesday
Sunny, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hercules CA
 38.02°N 122.27°W (Elev. 92 ft)
Last Update:
12:26 pm PST Jan 27, 2026
Forecast Valid:
6pm PST Jan 27, 2026-6pm PST Feb 3, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation