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

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

Critical fire weather conditions will persist in the central High Plains through Friday as gusty winds and dry conditions continue. The heat wave across the West and Southwest will continue to intensify through the week, with daily and monthly record highs expected to be broken. Read More >

Hazardous Weather Conditions

Current conditions at

LOS ALTOS (LOAC1)

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

NA

75°F

24°C

Humidity 59%
Wind Speed WSW 3 MPH
Barometer NA
Dewpoint 60°F (16°C)
Visibility NA
Last update 18 Mar 07:10 PM PDT
Extended Forecast for

5 Miles WSW Cupertino CA

Heat Advisory March 18, 08:10pm until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 18, 08:10pm until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 69 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 87. North northeast wind 3 to 6 mph.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 70. North northeast wind 3 to 5 mph.

    Low: 70 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 89. Light and variable wind becoming north northwest around 6 mph in the afternoon.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 66. West northwest wind 3 to 6 mph.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

Tonight
Clear, with a low around 69. North wind 3 to 5 mph.
Thursday
Sunny, with a high near 87. North northeast wind 3 to 6 mph.
Thursday Night
Clear, with a low around 70. North northeast wind 3 to 5 mph.
Friday
Sunny, with a high near 89. Light and variable wind becoming north northwest around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 66. West northwest wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Sunny, with a high near 74.
Sunday Night
Mostly clear, with a low around 51.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 50.
Wednesday
Sunny, with a high near 66.
Basemap Options
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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:
3:12 pm PDT Mar 18, 2026
Forecast Valid:
8pm PDT Mar 18, 2026-6pm PDT Mar 25, 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