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

LOS ALTOS (LOAC1)

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

NA

54°F

12°C

Humidity 78%
Wind Speed WSW 1 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 15 Sep 01:10 AM PDT
Extended Forecast for

Cupertino CA

  • Overnight

    Overnight: Mostly clear, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. Calm wind becoming north 5 to 8 mph in the afternoon.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55. North wind around 5 mph becoming calm after midnight.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. Light and variable wind becoming west northwest 5 to 9 mph in the afternoon.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 55. West northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 80.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 11pm. Otherwise, mostly clear, with a low around 56.

    Low: 56 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 83.

    High: 83 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 55. Calm wind.
Tuesday
Sunny, with a high near 82. Calm wind becoming north 5 to 8 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 55. North wind around 5 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 78. Light and variable wind becoming west northwest 5 to 9 mph in the afternoon.
Wednesday Night
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 55. West northwest wind 5 to 8 mph becoming calm in the evening.
Thursday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 80.
Thursday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 56.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 56.
Saturday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 81.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cupertino CA
 37.31°N 122.03°W (Elev. 262 ft)
Last Update:
1:26 am PDT Sep 15, 2026
Forecast Valid:
1am PDT Sep 15, 2026-6pm PDT Sep 21, 2026
 
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Additional Resources

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