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

LOS ALTOS (LOAC1)

Lat: 37.35472°NLon: 122.14167°WElev: 539.0ft.

NA

54°F

12°C

Humidity 97%
Wind Speed WSW 3 MPH
Barometer NA
Dewpoint 53°F (12°C)
Visibility NA
Last update 15 Nov 12:10 AM PST
Extended Forecast for

Cupertino CA

  • Overnight

    Overnight: A 10 percent chance of showers after 4am. Mostly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers, mainly after 10am. Mostly cloudy, with a high near 64. Calm wind becoming west northwest around 6 mph in the afternoon. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 64 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely. Cloudy, with a low around 53. South southwest wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 53 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, mainly after 10am. Mostly cloudy, with a high near 64. South wind 6 to 9 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: 64 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers. Low around 51. South southeast wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 51 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 4pm. Mostly cloudy, with a high near 62. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 30 percent chance of showers before 10pm. Partly cloudy, with a low around 47.

    Low: 47 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Overnight
A 10 percent chance of showers after 4am. Mostly cloudy, with a low around 51. Calm wind.
Saturday
A 50 percent chance of showers, mainly after 10am. Mostly cloudy, with a high near 64. Calm wind becoming west northwest around 6 mph in the afternoon. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Showers likely. Cloudy, with a low around 53. South southwest wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Showers likely, mainly after 10am. Mostly cloudy, with a high near 64. South wind 6 to 9 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
Showers. Low around 51. South southeast wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
Showers likely, mainly before 4pm. Mostly cloudy, with a high near 62. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 30 percent chance of showers before 10pm. Partly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Mostly sunny, with a high near 66.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 49.
Thursday
A chance of showers. Partly sunny, with a high near 64.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 48.
Friday
A slight chance of showers. Mostly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cupertino CA
 37.33°N 122.07°W (Elev. 305 ft)
Last Update:
8:05 pm PST Nov 14, 2025
Forecast Valid:
12am PST Nov 15, 2025-6pm PST Nov 21, 2025
 
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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