Heat Wave Continues in the West; Critical Fire Weather Conditions in the High Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. Read More >

Hazardous Weather Conditions

Current conditions at

LOS ALTOS (LOAC1)

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

NA

62°F

17°C

Humidity 70%
Wind Speed WSW 3 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 18 Mar 04:10 AM PDT
Extended Forecast for

5 Miles WSW Cupertino CA

Heat Advisory March 18, 04:31am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 18, 04:31am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 67. North wind 3 to 5 mph.

    Low: 67 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 88. North wind 3 to 5 mph.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 66. North northwest wind around 6 mph becoming light and variable  in the evening.

    Low: 66 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 88. Light and variable wind becoming north northwest around 6 mph in the afternoon.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 87. Calm wind becoming north around 5 mph in the afternoon.
Tonight
Clear, with a low around 67. North wind 3 to 5 mph.
Thursday
Sunny, with a high near 88. North wind 3 to 5 mph.
Thursday Night
Clear, with a low around 66. North northwest wind around 6 mph becoming light and variable in the evening.
Friday
Sunny, with a high near 88. Light and variable wind becoming north northwest around 6 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 62.
Saturday
Partly sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
Mostly sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 53.
Monday
Mostly sunny, with a high near 73.
Monday Night
Mostly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Cupertino CA
 37.29°N 122.14°W (Elev. 1798 ft)
1:59 am PDT Mar 18, 2026
4am PDT Mar 18, 2026-6pm PDT Mar 24, 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