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

55°F

13°C

Humidity 79%
Wind Speed WSW 3 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Last update 21 Mar 07:10 AM PDT
Extended Forecast for

5 Miles WSW Cupertino CA

  • Today

    Today: Mostly sunny, with a high near 74. North wind 5 to 9 mph, with gusts as high as 23 mph.

    High: 74 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. Northwest wind 5 to 9 mph, with gusts as high as 23 mph.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 73. Northwest wind 5 to 7 mph.

    High: 73 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. West northwest wind 5 to 7 mph.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 70. West northwest wind 3 to 7 mph.

    High: 70 °F

    Sunny

  • Monday Night

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

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Tuesday Night

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

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 74. North wind 5 to 9 mph, with gusts as high as 23 mph.
Tonight
Mostly clear, with a low around 53. Northwest wind 5 to 9 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 73. Northwest wind 5 to 7 mph.
Sunday Night
Mostly clear, with a low around 50. West northwest wind 5 to 7 mph.
Monday
Sunny, with a high near 70. West northwest wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Mostly sunny, with a high near 69.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Sunny, with a high near 68.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 71.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Cupertino CA
 37.29°N 122.14°W (Elev. 1798 ft)
2:22 am PDT Mar 21, 2026
7am PDT Mar 21, 2026-6pm PDT Mar 27, 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