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

Critical Fire Weather in the Plains; Unseasonably Warm in the Southwest and Southern U.S.

Unseasonably warm temperatures continue through the weekend across the Southwest and southern U.S., with more than 100 record or near record maximum temperatures forecast through the rest of the week and over the weekend. Elevated to critical fire weather conditions will persist across the Plains and Southeast U.S. this weekend. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

63°F

17°C

Humidity 55%
Wind Speed N 0 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 28 Mar 10:20 PM PDT
Extended Forecast for

Castro Valley CA

  • Tonight

    Tonight: Mostly clear, with a low around 54. Light and variable wind.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 54. Southwest wind 5 to 7 mph.

    Low: 54 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 75. West wind 3 to 8 mph.

    High: 75 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 51. West southwest wind 6 to 8 mph.

    Low: 51 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain. Partly sunny, with a high near 69.

    High: 69 °F

    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance Rain

  • Wednesday

    Wednesday: A chance of rain, mainly after 11am. Partly sunny, with a high near 69.

    High: 69 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 54. Light and variable wind.
Sunday
Sunny, with a high near 84. Calm wind becoming west 5 to 8 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 54. Southwest wind 5 to 7 mph.
Monday
Mostly cloudy, with a high near 75. West wind 3 to 8 mph.
Monday Night
Mostly cloudy, with a low around 51. West southwest wind 6 to 8 mph.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 69.
Tuesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 50.
Wednesday
A chance of rain, mainly after 11am. Partly sunny, with a high near 69.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 48.
Thursday
A slight chance of rain before 11am. Mostly sunny, with a high near 65.
Thursday Night
Clear, with a low around 44.
Friday
Sunny, with a high near 73.
Friday Night
Clear, with a low around 48.
Saturday
Sunny, with a high near 78.
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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:
2:26 pm PDT Mar 28, 2026
Forecast Valid:
10pm PDT Mar 28, 2026-6pm PDT Apr 4, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation