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

CORRALITOS (CTOC1)

Lat: 36.99086°NLon: 121.80488°WElev: 327.0ft.

NA

57°F

14°C

Humidity 88%
Wind Speed SW 2 MPH
Barometer NA
Dewpoint 53°F (12°C)
Visibility NA
Last update 25 Dec 10:27 AM PST
Extended Forecast for

San Martin CA

Flood Watch December 25, 11:35am until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 25, 11:35am until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Christmas Day

    High: 57 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then showers likely after 1am. Some of the storms could be severe. Low around 46. South wind 10 to 20 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Severe
    Thunderstorms

  • Friday

    Friday: Showers likely, mainly after 5pm. Mostly cloudy, with a high near 56. Southeast wind 9 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 56 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 43. Southeast wind 3 to 6 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F

    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before 10am. Mostly sunny, with a high near 54. North northwest wind 3 to 6 mph.

    High: 54 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy frost after 3am. Otherwise, mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Frost

  • Sunday

    Sunday: Patchy frost before 8am. Otherwise, sunny, with a high near 56.

    High: 56 °F

    Patchy Frost
    then Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 4am. Otherwise, mostly clear, with a low around 36.

    Low: 36 °F

    Clear then
    Patchy Frost

Detailed Forecast

Christmas Day
Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then a chance of showers after 4pm. Some of the storms could be severe. Mostly cloudy, with a high near 57. South wind around 18 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then showers likely after 1am. Some of the storms could be severe. Low around 46. South wind 10 to 20 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers likely, mainly after 5pm. Mostly cloudy, with a high near 56. Southeast wind 9 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43. Southeast wind 3 to 6 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 20 percent chance of showers before 10am. Mostly sunny, with a high near 54. North northwest wind 3 to 6 mph.
Saturday Night
Patchy frost after 3am. Otherwise, mostly clear, with a low around 35.
Sunday
Patchy frost before 8am. Otherwise, sunny, with a high near 56.
Sunday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 36.
Monday
Patchy frost before 8am. Otherwise, sunny, with a high near 59.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 62.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Sunny, with a high near 63.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Martin CA
 37.08°N 121.6°W (Elev. 276 ft)
Last Update:
11:22 am PST Dec 25, 2025
Forecast Valid:
11am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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