Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

81°F

27°C

Humidity 39%
Wind Speed N 2 MPH
Barometer NA
Dewpoint 54°F (12°C)
Visibility NA
Heat Index81°F (27°C)
Last update 21 Mar 03:10 PM PDT
Extended Forecast for

5 Miles WSW Cupertino CA

  • Tonight

    Tonight: Mostly clear, with a low around 54. Northwest wind 5 to 9 mph, with gusts as high as 23 mph.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74. Light and variable wind becoming north 5 to 7 mph in the morning.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 54. Northwest wind around 6 mph.

    Low: 54 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 72. Northwest wind 5 to 7 mph.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. Northwest wind 3 to 7 mph.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Tuesday Night

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

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 54. Northwest wind 5 to 9 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 74. Light and variable wind becoming north 5 to 7 mph in the morning.
Sunday Night
Mostly clear, with a low around 54. Northwest wind around 6 mph.
Monday
Sunny, with a high near 72. Northwest wind 5 to 7 mph.
Monday Night
Mostly clear, with a low around 54. Northwest wind 3 to 7 mph.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 53.
Wednesday
Sunny, with a high near 70.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Mostly sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 72.
Friday Night
Mostly cloudy, with a low around 53.
Saturday
Mostly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Cupertino CA
 37.29°N 122.14°W (Elev. 1798 ft)
2:07 pm PDT Mar 21, 2026
4pm PDT Mar 21, 2026-6pm PDT Mar 28, 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