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

Sinlaku Continues to Impact the Marianas; Severe Weather for the Central Plains and Northeast; Record Warmth for mid-Atlantic to Southeast

Sinlaku continues to affect the Marianas as it moves north through Friday. Meanwhile, severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley today and for the Central/Southern Plains on Friday. Considerable flooding impacts are ongoing in the Upper Great Lakes, and expected to continue through the weekend. Fire weather concerns persist in the Plains. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

63°F

17°C

Humidity 27%
Wind Speed NNE 2 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 16 Apr 11:10 AM PDT
Extended Forecast for

Cupertino CA

  • Today

    Today: Sunny, with a high near 68. North northwest wind 11 to 14 mph, with gusts as high as 25 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 45. Northwest wind 7 to 11 mph, with gusts as high as 22 mph.

    Low: 45 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 71. North northwest wind 5 to 9 mph.

    High: 71 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45. North northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 76. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of rain after 11pm. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance Rain

  • Monday

    Monday: Rain likely, mainly before 11am. Partly sunny, with a high near 67.

    High: 67 °F

    Rain Likely

Detailed Forecast

Today
Sunny, with a high near 68. North northwest wind 11 to 14 mph, with gusts as high as 25 mph.
Tonight
Clear, with a low around 45. Northwest wind 7 to 11 mph, with gusts as high as 22 mph.
Friday
Sunny, with a high near 71. North northwest wind 5 to 9 mph.
Friday Night
Partly cloudy, with a low around 45. North northwest wind 5 to 8 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 76. Calm wind becoming west northwest around 6 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 49.
Sunday
Partly sunny, with a high near 71.
Sunday Night
A chance of rain after 11pm. Mostly cloudy, with a low around 50.
Monday
Rain likely, mainly before 11am. Partly sunny, with a high near 67.
Monday Night
A chance of rain. Mostly cloudy, with a low around 49.
Tuesday
Rain likely. Mostly cloudy, with a high near 65.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 48.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cupertino CA
 37.31°N 122.06°W (Elev. 610 ft)
Last Update:
10:41 am PDT Apr 16, 2026
Forecast Valid:
11am PDT Apr 16, 2026-6pm PDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation