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

Heavy Snow in the Sierra Nevada; Heavy Rainfall in Texas Sunday

Heavy snow is expected in the Sierra Nevada mountain ranges into Saturday causing hazardous travel conditions. Winter Storm Warnings have been issued. Thunderstorms and moderate to heavy rainfall are expected across portions of eastern Texas into Louisiana on Sunday. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

52°F

11°C

Humidity 87%
Wind Speed ESE 6 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 14 Nov 06:35 AM PST
Extended Forecast for

Castro Valley CA

  • Today

    Today: A 20 percent chance of rain before 8am. Partly sunny, with a high near 64. Calm wind becoming south around 5 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Tonight

    Tonight: Cloudy, with a low around 51. Calm wind becoming southeast around 6 mph after midnight.

    Low: 51 °F

    Cloudy

  • Sunday

    Sunday: Rain, mainly after noon. High near 63. South wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Cloudy then
    Rain

  • Sunday Night

    Sunday Night: Rain, mainly before 10pm. Low around 50. West wind around 5 mph becoming calm after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Rain then
    Chance Rain

  • Monday

    Monday: A 20 percent chance of rain. Mostly sunny, with a high near 60. Calm wind becoming west northwest 5 to 8 mph in the morning. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Slight Chance
    Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, sunny, with a high near 60.

    High: 60 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain after 10pm. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain. Cloudy, with a high near 59.

    High: 59 °F

    Rain

Detailed Forecast

Today
A 20 percent chance of rain before 8am. Partly sunny, with a high near 64. Calm wind becoming south around 5 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Cloudy, with a low around 51. Calm wind becoming southeast around 6 mph after midnight.
Sunday
Rain, mainly after noon. High near 63. South wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain, mainly before 10pm. Low around 50. West wind around 5 mph becoming calm after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 20 percent chance of rain. Mostly sunny, with a high near 60. Calm wind becoming west northwest 5 to 8 mph in the morning. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Patchy fog before 8am. Otherwise, sunny, with a high near 60.
Tuesday Night
A chance of rain after 10pm. Mostly cloudy, with a low around 47.
Wednesday
Rain. Cloudy, with a high near 59.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 45.
Thursday
A chance of rain. Partly sunny, with a high near 58.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 42.
Friday
Sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.71°N 122.08°W (Elev. 397 ft)
Last Update:
1:01 am PST Nov 14, 2026
Forecast Valid:
6am PST Nov 14, 2026-6pm PST Nov 20, 2026
 
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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