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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Partly Cloudy

59°F

15°C

Humidity 67%
Wind Speed S 11 MPH
Barometer 29.84 in (1010.5 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 25 Dec 10:20 AM PST
Extended Forecast for

San Leandro CA

Flood Watch December 25, 10:43am until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 25, 10:43am until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Christmas Day

    High: 58 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 10pm, then rain likely after 10pm. Some of the storms could be severe. Steady temperature around 53. South wind 13 to 21 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Severe
    Thunderstorms
    then Rain
    Likely

  • Friday

    Friday: Rain. High near 58. South wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 58 °F

    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 46. Southwest wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain. Partly sunny, with a high near 55. North wind around 6 mph.

    High: 55 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Christmas Day
Showers and possibly a thunderstorm. Some of the storms could be severe. High near 58. Southwest wind 17 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 10pm, then rain likely after 10pm. Some of the storms could be severe. Steady temperature around 53. South wind 13 to 21 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Rain. High near 58. South wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 46. Southwest wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 55. North wind around 6 mph.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Mostly sunny, with a high near 54.
Sunday Night
Mostly clear, with a low around 38.
Monday
Patchy frost before 7am. Otherwise, sunny, with a high near 56.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
Mostly cloudy, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Leandro CA
 37.7°N 122.16°W (Elev. 43 ft)
Last Update:
8:59 am PST Dec 25, 2025
Forecast Valid:
10am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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