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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

54°F

12°C

Humidity 93%
Wind Speed WSW 2 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 18 Jun 05:10 AM PDT
Extended Forecast for

5 Miles WSW Cupertino CA

  • Today

    Today: Sunny, with a high near 72. South wind around 7 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 61. South southwest wind around 8 mph.

    Low: 61 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a steady temperature around 65. South wind around 8 mph, with gusts as high as 18 mph.

    High: 65 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60. Southwest wind 3 to 7 mph.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 70. Calm wind becoming west around 5 mph in the afternoon.

    High: 70 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 72. South wind around 7 mph.
Tonight
Partly cloudy, with a low around 61. South southwest wind around 8 mph.
Juneteenth
Mostly sunny, with a steady temperature around 65. South wind around 8 mph, with gusts as high as 18 mph.
Friday Night
Partly cloudy, with a low around 60. Southwest wind 3 to 7 mph.
Saturday
Sunny, with a high near 70. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 55.
Sunday
Sunny, with a high near 72.
Sunday Night
Mostly clear, with a low around 58.
Monday
Sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Cupertino CA
 37.29°N 122.14°W (Elev. 1798 ft)
Last Update:
2:56 am PDT Jun 18, 2026
Forecast Valid:
5am PDT Jun 18, 2026-6pm PDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation