A Wintry Mix in the Northeast; Rain and High Elevation Snow Returns to California

A clipper system tracking across the U.S./Canadian border will bring snowfall and mixed precipitation across the Northeast. A modest atmospheric river associated with a Pacific system will bring lower elevation/coastal rain, high elevation snow/wintry mix, and gusty winds in California into the Intermountain West. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

48°F

9°C

Humidity 61%
Wind Speed NNW 3 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 09 Feb 11:20 PM PST
Extended Forecast for

Castro Valley CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. Light east wind.

    Low: 47 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Rain likely, then showers and possibly a thunderstorm after 4pm.  High near 61. Light south southeast wind becoming south 5 to 9 mph in the morning.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 61 °F

    Chance Rain
    then Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 10pm, then rain after 10pm.  Low around 49. East wind 6 to 10 mph, with gusts as high as 18 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Showers

  • Wednesday

    Wednesday: Rain before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then rain likely and possibly a thunderstorm after 4pm.  High near 58. South wind 9 to 11 mph, with gusts as high as 21 mph.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 58 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain likely, mainly before 10pm.  Mostly cloudy, with a low around 48. Southeast wind 5 to 7 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Rain Likely
    then Chance
    Rain

  • Thursday

    Thursday: A 20 percent chance of rain before 10am.  Mostly sunny, with a high near 60.

    High: 60 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 47. Light east wind.
Tuesday
Rain likely, then showers and possibly a thunderstorm after 4pm. High near 61. Light south southeast wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Low around 49. East wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Rain before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then rain likely and possibly a thunderstorm after 4pm. High near 58. South wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 48. Southeast wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A 20 percent chance of rain before 10am. Mostly sunny, with a high near 60.
Thursday Night
Mostly clear, with a low around 45.
Friday
Mostly sunny, with a high near 63.
Friday Night
Mostly cloudy, with a low around 45.
Saturday
A slight chance of rain after 10am. Mostly cloudy, with a high near 60.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 44.
Sunday
Rain likely. Mostly cloudy, with a high near 57.
Sunday Night
Rain likely. Mostly cloudy, with a low around 42.
Washington's Birthday
Rain. Mostly cloudy, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.69°N 122.05°W (Elev. 364 ft)
12:27 pm PST Feb 9, 2026
11pm PST Feb 9, 2026-6pm PST Feb 16, 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