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

Severe Weather and Flooding Threats for the Central U.S.; Fire Weather Concerns for the Western U.S.

Severe weather and flooding threats will continue for portions of the central U.S. through Thursday, focused from the central High Plains to the Mid-Mississippi Valley. Hot and dry conditions will fuel fire weather concerns for the Intermountain West, and dry thunderstorms may spark additional wildfires. Dangerous heat will build across the southern U.S. Friday into the weekend. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

Lat: 37.66083°NLon: 122.11833°WElev: 46.0ft.

Overcast

57°F

14°C

Humidity 87%
Wind Speed WNW 10 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 25 Jun 12:35 AM PDT
Extended Forecast for

Castro Valley CA

  • Overnight

    Overnight: Cloudy, with a low around 55. West southwest wind around 7 mph.

    Low: 55 °F

    Cloudy

  • Thursday

    Thursday: Cloudy through mid morning, then gradual clearing, with a high near 73. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 73 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 55. Southwest wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 69. West southwest wind around 14 mph, with gusts as high as 25 mph.

    High: 69 °F

    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of drizzle. Mostly cloudy, with a low around 56. West southwest wind 13 to 15 mph, with gusts as high as 29 mph.

    Low: 56 °F

    Slight Chance
    Drizzle

  • Saturday

    Saturday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Overnight
Cloudy, with a low around 55. West southwest wind around 7 mph.
Thursday
Cloudy through mid morning, then gradual clearing, with a high near 73. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Increasing clouds, with a low around 55. Southwest wind 11 to 13 mph, with gusts as high as 23 mph.
Friday
Partly sunny, with a high near 69. West southwest wind around 14 mph, with gusts as high as 25 mph.
Friday Night
A slight chance of drizzle. Mostly cloudy, with a low around 56. West southwest wind 13 to 15 mph, with gusts as high as 29 mph.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
Mostly clear, with a low around 52.
Sunday
Sunny, with a high near 76.
Sunday Night
Mostly clear, with a low around 54.
Monday
Mostly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.72°N 122.05°W (Elev. 397 ft)
Last Update:
12:40 am PDT Jun 25, 2026
Forecast Valid:
12am PDT Jun 25, 2026-6pm PDT Jul 1, 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