Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

86°F

30°C

Humidity 42%
Wind Speed NE 2 MPH
Barometer NA
Dewpoint 60°F (16°C)
Visibility NA
Heat Index86°F (30°C)
Last update 27 Aug 04:10 PM PDT
Extended Forecast for

2 Miles WSW Cupertino CA

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms.  Cloudy, with a steady temperature around 83. Light north northeast wind.

    High: 83 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 60. Calm wind becoming west northwest around 5 mph.

    Low: 60 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A slight chance of showers and thunderstorms.  Cloudy, then gradually becoming mostly sunny, with a high near 80. Calm wind becoming north 5 to 7 mph in the afternoon.  Chance of precipitation is 20%.

    High: 80 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54. Light and variable wind.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78. Calm wind becoming west northwest 5 to 8 mph in the afternoon.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Monday

    Monday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 75.

    High: 75 °F

    Patchy Fog
    then Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Cloudy, with a steady temperature around 83. Light north northeast wind.
Tonight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Calm wind becoming west northwest around 5 mph.
Friday
A slight chance of showers and thunderstorms. Cloudy, then gradually becoming mostly sunny, with a high near 80. Calm wind becoming north 5 to 7 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 54. Light and variable wind.
Saturday
Sunny, with a high near 78. Calm wind becoming west northwest 5 to 8 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 53.
Sunday
Sunny, with a high near 77.
Sunday Night
Mostly clear, with a low around 52.
Monday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 52.
Tuesday
A slight chance of showers. Patchy fog. Otherwise, mostly sunny, with a high near 77.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 53.
Wednesday
Mostly sunny, with a high near 79.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 54.
Thursday
A slight chance of showers. Mostly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Cupertino CA
 37.3°N 122.09°W (Elev. 797 ft)
1:42 pm PDT Aug 27, 2026
4pm PDT Aug 27, 2026-6pm PDT Sep 3, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database