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

69°F

21°C

Humidity 50%
Wind Speed WSW 2 MPH
Barometer NA
Dewpoint 50°F (10°C)
Visibility NA
Last update 20 Mar 09:10 PM PDT
Extended Forecast for

5 Miles WSW Cupertino CA

  • Tonight

    Tonight: Mostly clear, with a low around 62. Southwest wind 3 to 5 mph.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 73. North northwest wind 5 to 9 mph, with gusts as high as 22 mph.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 52. West northwest wind 7 to 9 mph, with gusts as high as 23 mph.

    Low: 52 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 72. North northwest wind 5 to 7 mph.

    High: 72 °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 71.

    High: 71 °F

    Sunny

  • Monday Night

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

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Tuesday Night

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

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 62. Southwest wind 3 to 5 mph.
Saturday
Mostly sunny, with a high near 73. North northwest wind 5 to 9 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 52. West northwest wind 7 to 9 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 72. North 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 71.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 68.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Mostly sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 52.
Friday
Mostly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Cupertino CA
 37.29°N 122.14°W (Elev. 1798 ft)
8:21 pm PDT Mar 20, 2026
9pm PDT Mar 20, 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