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

Heat Builds in the West; Severe Thunderstorms and Heavy Rain in the Upper Midwest and Mid-Mississippi Valley; Extremely Critical Fire Weather in the Northwest on Saturday

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms and heavy rainfall are expected over parts of the Upper Midwest to mid-Mississippi Valley today. Critical to extremely critical fire weather conditions from the Northwest and the northern Great Basin on Saturday and Sunday. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

57°F

14°C

Humidity 86%
Wind Speed NE 4 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 31 Jul 05:54 AM PDT
Extended Forecast for

2 Miles SW Castro Valley CA

  • Today

    Today: Sunny, with a high near 82. Light and variable wind becoming west 5 to 9 mph in the morning.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 58. South southwest wind 5 to 7 mph.

    Low: 58 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 85. West wind 3 to 8 mph.

    High: 85 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59. South southwest wind 7 to 9 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 86. South southwest wind 5 to 9 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 82. Light and variable wind becoming west 5 to 9 mph in the morning.
Tonight
Increasing clouds, with a low around 58. South southwest wind 5 to 7 mph.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 85. West wind 3 to 8 mph.
Saturday Night
Mostly clear, with a low around 59. South southwest wind 7 to 9 mph.
Sunday
Sunny, with a high near 86. South southwest wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 60.
Monday
Sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 60.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Castro Valley CA
 37.69°N 122.07°W (Elev. 197 ft)
Last Update:
1:26 am PDT Jul 31, 2026
Forecast Valid:
6am PDT Jul 31, 2026-6pm PDT Aug 6, 2026
 
Forecast Discussion
 
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Additional Resources

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