Monsoons Return to the Southwest U.S.; Potential Atlantic Tropical System Interaction

In Arizona and New Mexico, heavy to excessive rainfall from monsoon thunderstorms may bring isolated flash and urban flooding Thursday into Sunday. The close proximity of Tropical Storm Humberto and a tropical wave (AL94) could lead to interaction between them, and details of their long-range track and intensity forecasts, and any potential impacts, are more uncertain than usual. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

73°F

23°C

Humidity 53%
Wind Speed N 4 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 24 Sep 08:05 PM PDT
Extended Forecast for

2 Miles SW Castro Valley CA

  • Tonight

    Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers.  Mostly cloudy, with a low around 64. Calm wind.  Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 78 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60. West wind 5 to 9 mph becoming calm  after midnight.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 83. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. West wind 5 to 8 mph becoming calm  in the evening.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 61.

    Low: 61 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming west 5 to 8 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 60. West wind 5 to 9 mph becoming calm after midnight.
Friday
Sunny, with a high near 83. Calm wind becoming west 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 60. West wind 5 to 8 mph becoming calm in the evening.
Saturday
Sunny, with a high near 78.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
Partly sunny, with a high near 74.
Sunday Night
Mostly cloudy, with a low around 61.
Monday
A chance of rain. Partly sunny, with a high near 74.
Monday Night
A chance of rain. Mostly cloudy, with a low around 60.
Tuesday
A chance of rain. Partly sunny, with a high near 73.
Tuesday Night
A chance of rain. Partly cloudy, with a low around 57.
Wednesday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Castro Valley CA
 37.69°N 122.07°W (Elev. 197 ft)
3:20 pm PDT Sep 24, 2025
8pm PDT Sep 24, 2025-6pm PDT Oct 1, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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