Heavy Rain From the Plains to the Northeast; Heat Wave Begins

Severe thunderstorms and heavy rainfall are likely across parts of the Northeast, portions of the northern and central Plains, and the Ohio Valley. Portions of northeast Missouri and central Illinois could experience locally significant flash flooding. Dangerously hot conditions are expected in the Central Plains, Lower and Middle Mississippi Valley, and Southeast. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Overcast

63°F

17°C

Humidity 77%
Wind Speed WNW 11 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 20 Jul 10:55 AM PDT
Extended Forecast for

Castro Valley CA

  • Today

    Today: Sunny, with a high near 73. West wind 7 to 13 mph.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 58. Southwest wind 9 to 11 mph.

    Low: 58 °F

    Increasing
    Clouds

  • Monday

    Monday: Cloudy, then gradually becoming mostly sunny, with a high near 68. West wind 10 to 14 mph.

    High: 68 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Increasing clouds, with a low around 58. West southwest wind 8 to 13 mph.

    Low: 58 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 68. West southwest wind 8 to 14 mph.

    High: 68 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 73. West wind 7 to 13 mph.
Tonight
Increasing clouds, with a low around 58. Southwest wind 9 to 11 mph.
Monday
Cloudy, then gradually becoming mostly sunny, with a high near 68. West wind 10 to 14 mph.
Monday Night
Increasing clouds, with a low around 58. West southwest wind 8 to 13 mph.
Tuesday
Mostly cloudy, with a high near 68. West southwest wind 8 to 14 mph.
Tuesday Night
Mostly cloudy, with a low around 57.
Wednesday
Partly sunny, with a high near 69.
Wednesday Night
Mostly cloudy, with a low around 57.
Thursday
Partly sunny, with a high near 69.
Thursday Night
Mostly cloudy, with a low around 58.
Friday
Partly sunny, with a high near 69.
Friday Night
Mostly cloudy, with a low around 57.
Saturday
Partly sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.69°N 122.07°W (Elev. 197 ft)
5:22 am PDT Jul 20, 2025
11am PDT Jul 20, 2025-6pm PDT Jul 26, 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