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

Severe Weather in the Central U.S.; Critical Fire Weather in the Southern Plains

Severe thunderstorms are expected to form today from northern Oklahoma into southern Minnesota. Very large hail and tornadoes will be the initial threats this afternoon, then transition into a wind threat tonight. Gusty winds, warm temperatures, and very dry conditions will create a Critical Risk of fire weather across portions of the southern Plains today. 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 59%
Wind Speed W 8 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 23 Apr 11:00 AM PDT
Extended Forecast for

Castro Valley CA

  • Today

    Today: Sunny, with a high near 69. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 49. Southwest wind 5 to 7 mph.

    Low: 49 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 65. Light southwest wind becoming west 5 to 10 mph in the morning.

    High: 65 °F

    Partly Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 50. West wind 7 to 10 mph.

    Low: 50 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 64. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 64 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain before 11am. Mostly sunny, with a high near 65.

    High: 65 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 69. Calm wind becoming west 5 to 8 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 49. Southwest wind 5 to 7 mph.
Friday
Partly sunny, with a high near 65. Light southwest wind becoming west 5 to 10 mph in the morning.
Friday Night
Increasing clouds, with a low around 50. West wind 7 to 10 mph.
Saturday
Partly sunny, with a high near 64. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Saturday Night
Mostly cloudy, with a low around 50.
Sunday
A 20 percent chance of rain before 11am. Mostly sunny, with a high near 65.
Sunday Night
Mostly clear, with a low around 48.
Monday
Mostly sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Mostly sunny, with a high near 71.
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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:
8:31 am PDT Apr 23, 2026
Forecast Valid:
11am PDT Apr 23, 2026-6pm PDT Apr 29, 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