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

Rapid Warm-Up Forecast Across Much of the Lower 48 Today and Tuesday

Most of the U.S. starts the week calm and unseasonably warm. The Heartland will be warmest, with highs 25–30° above average. Only the Gulf Coast stays chilly. Rain today is limited to western Washington while lake effect snow continues east of Lake Ontario. Cooler air returns after Tuesday, bringing a wintry mix to the Midwest and Northeast by Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Berkeley Lab (LBNL1)

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

NA

59°F

15°C

Humidity 41%
Wind Speed ENE 5 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 12 Jan 01:45 PM PST
Extended Forecast for

Hercules CA

Cold Weather Advisory January 13, 01:00am until January 13, 09:00am
Click here for hazard details and duration
Cold Weather Advisory

  • This Afternoon

    This Afternoon: Sunny, with a high near 57. East northeast wind around 10 mph.

    High: 57 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 43. East wind around 8 mph.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 59. East wind 11 to 13 mph, with gusts as high as 21 mph.

    High: 59 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42. East wind around 7 mph.

    Low: 42 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 60. Northeast wind around 8 mph.

    High: 60 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 57. East northeast wind around 10 mph.
Tonight
Mostly clear, with a low around 43. East wind around 8 mph.
Tuesday
Sunny, with a high near 59. East wind 11 to 13 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly clear, with a low around 42. East wind around 7 mph.
Wednesday
Sunny, with a high near 60. Northeast wind around 8 mph.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Sunny, with a high near 60.
Thursday Night
Mostly clear, with a low around 46.
Friday
Sunny, with a high near 60.
Friday Night
Mostly clear, with a low around 45.
Saturday
Mostly sunny, with a high near 60.
Saturday Night
Mostly clear, with a low around 45.
Sunday
Mostly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hercules CA
 38.02°N 122.27°W (Elev. 92 ft)
Last Update:
12:41 pm PST Jan 12, 2026
Forecast Valid:
2pm PST Jan 12, 2026-6pm PST Jan 18, 2026
 
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