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

Heavy Rainfall in Florida; Critical Fire Weather in the Southeast; Heavy Rain and Flooding Concerns in Hawaii

Thunderstorms and periods of heavy to excessive rainfall will continue over Florida through Thursday; and will begin to impact the central Plains today. Dry and gusty conditions will promote elevated to critical fire weather conditions in the Southeast. A Kona Low is expected to bring strong winds, widespread heavy rainfall, and flooding concerns to the island chain through the weekend. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

79°F

26°C

Humidity 47%
Wind Speed NE 2 MPH
Barometer NA
Dewpoint 57°F (14°C)
Visibility NA
Heat Index80°F (27°C)
Last update 08 Apr 03:10 PM PDT
Extended Forecast for

Cupertino CA

  • Tonight

    Tonight: Increasing clouds, with a low around 52. Northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 52 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 74. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 74 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 11pm. Partly cloudy, with a low around 53. Southwest wind 5 to 8 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.

    Low: 53 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 67. Calm wind becoming south southwest 5 to 9 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 67 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely, mainly after 11pm. Mostly cloudy, with a low around 51. South wind 5 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 62. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Showers

  • Saturday Night

    Saturday Night: Rain likely. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.

    Low: 45 °F

    Rain Likely

  • Sunday

    Sunday: A chance of rain. Partly sunny, with a high near 59.

    High: 59 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A slight chance of rain. Partly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Increasing clouds, with a low around 52. Northwest wind 5 to 8 mph becoming calm in the evening.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 74. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Thursday Night
A 30 percent chance of showers after 11pm. Partly cloudy, with a low around 53. Southwest wind 5 to 8 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 67. Calm wind becoming south southwest 5 to 9 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely, mainly after 11pm. Mostly cloudy, with a low around 51. South wind 5 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 62. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Rain likely. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.
Sunday
A chance of rain. Partly sunny, with a high near 59.
Sunday Night
A slight chance of rain. Partly cloudy, with a low around 44.
Monday
Sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Mostly sunny, with a high near 67.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Mostly sunny, with a high near 71.
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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:
2:11 pm PDT Apr 8, 2026
Forecast Valid:
3pm PDT Apr 8, 2026-6pm PDT Apr 15, 2026
 
Forecast Discussion
 
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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