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

Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

An atmospheric river will continue to bring gusty winds, moderate to heavy rainfall, and potential flooding to southern California and the southern Great Basin through Sunday. Periods of heavy snow will continue as well above 7,000 feet over the Sierra Nevada mountains associated with this atmospheric river. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

54°F

12°C

Humidity 89%
Wind Speed NNE 3 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 15 Nov 02:54 AM PST
Extended Forecast for

2 Miles SW Castro Valley CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Cloudy

  • Saturday

    Saturday: Rain likely, mainly after 4pm. Mostly cloudy, with a high near 65. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 65 °F

    Chance Rain
    then Rain
    Likely

  • Saturday Night

    Saturday Night: Rain. Low around 56. South southwest wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 56 °F

    Rain

  • Sunday

    Sunday: Rain likely. Mostly cloudy, with a high near 63. South southwest wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Rain Likely

  • Sunday Night

    Sunday Night: Rain. Low around 54. South southwest wind 11 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 54 °F

    Rain

  • Monday

    Monday: Rain likely, mainly before 4pm. Mostly cloudy, with a high near 61. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 61 °F

    Rain Likely

  • Monday Night

    Monday Night: A 20 percent chance of rain before 10pm. Partly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 53. Calm wind.
Saturday
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 65. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Rain. Low around 56. South southwest wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
Rain likely. Mostly cloudy, with a high near 63. South southwest wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain. Low around 54. South southwest wind 11 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
Rain likely, mainly before 4pm. Mostly cloudy, with a high near 61. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 20 percent chance of rain before 10pm. Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 48.
Wednesday
Partly sunny, with a high near 62.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 51.
Thursday
Rain likely. Mostly cloudy, with a high near 60.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 49.
Friday
A chance of rain. Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Castro Valley CA
 37.69°N 122.1°W (Elev. 174 ft)
Last Update:
2:52 am PST Nov 15, 2025
Forecast Valid:
3am PST Nov 15, 2025-6pm PST Nov 21, 2025
 
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