Coastal Storm Along the East Coast; Pacific Storm System in the West on Friday

A strengthening coastal storm will bring soaking rains to portions of the Mid-Atlantic and Northeast, with accumulating snow likely across the higher elevations of northern New England through Friday. A Pacific storm system will bring heavy low elevation rain, and gusty winds to northern California and the Pacific Northwest, as well as possible blizzard conditions to the Sierra Nevada on Friday. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

51°F

11°C

Humidity 86%
Wind Speed WSW 3 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 12 Nov 06:10 AM PST
Extended Forecast for

Cupertino CA

  • Today

    Today: Mostly sunny, with a high near 73. Light south southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 73 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of rain, mainly after 5am.  Increasing clouds, with a low around 54. South southeast wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 54 °F

    Partly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain and thunderstorms likely before noon, then showers and possibly a thunderstorm between noon and 4pm, then rain likely and possibly a thunderstorm after 4pm.  High near 63. South southwest wind 14 to 18 mph, with gusts as high as 32 mph.  Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 63 °F

    Showers
    Likely then
    Showers

  • Friday Night

    Friday Night: Rain likely, mainly before 10pm.  Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 48. South wind 3 to 6 mph.  Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Rain Likely
    then Chance
    Rain and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 65. Calm wind.

    High: 65 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain likely, mainly after 4pm.  Mostly cloudy, with a high near 64. Chance of precipitation is 60%.

    High: 64 °F

    Rain Likely

  • Sunday Night

    Sunday Night: Rain.  Mostly cloudy, with a low around 49.

    Low: 49 °F

    Rain

  • Monday

    Monday: Rain likely, mainly before 10am.  Mostly cloudy, with a high near 59.

    High: 59 °F

    Rain Likely

Detailed Forecast

Today
Mostly sunny, with a high near 73. Light south southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Tonight
A 30 percent chance of rain, mainly after 5am. Increasing clouds, with a low around 54. South southeast wind 9 to 13 mph, with gusts as high as 21 mph.
Friday
Rain and thunderstorms likely before noon, then showers and possibly a thunderstorm between noon and 4pm, then rain likely and possibly a thunderstorm after 4pm. High near 63. South southwest wind 14 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Rain likely, mainly before 10pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 48. South wind 3 to 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 65. Calm wind.
Saturday Night
Mostly cloudy, with a low around 48.
Sunday
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Sunday Night
Rain. Mostly cloudy, with a low around 49.
Monday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 59.
Monday Night
A slight chance of rain before 10pm. Partly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
A chance of rain. Partly cloudy, with a low around 45.
Wednesday
Rain likely. Mostly cloudy, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Cupertino CA
 37.31°N 122.03°W (Elev. 262 ft)
2:26 am PST Nov 12, 2026
6am PST Nov 12, 2026-6pm PST Nov 18, 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