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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

80°F

27°C

Humidity 41%
Wind Speed NNW 3 MPH
Barometer NA
Dewpoint 54°F (12°C)
Visibility NA
Heat Index80°F (27°C)
Last update 18 Sep 02:10 PM PDT
Extended Forecast for

Los Altos CASimilar City Names

  • This Afternoon

    This Afternoon: Sunny, with a high near 81. North northwest wind around 9 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, increasing clouds, with a low around 55. North northwest wind around 6 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming north northwest 5 to 8 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 56. North northwest wind around 6 mph becoming calm in the evening.

    Low: 56 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 78. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 80.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Monday Night

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

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 81. North northwest wind around 9 mph.
Tonight
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 55. North northwest wind around 6 mph becoming calm in the evening.
Saturday
Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming north northwest 5 to 8 mph in the afternoon.
Saturday Night
Increasing clouds, with a low around 56. North northwest wind around 6 mph becoming calm in the evening.
Sunday
Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 78. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Sunday Night
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 56.
Monday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 80.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Los Altos CASimilar City Names
 37.35°N 122.1°W (Elev. 335 ft)
Last Update:
1:26 pm PDT Sep 18, 2026
Forecast Valid:
2pm PDT Sep 18, 2026-6pm PDT Sep 24, 2026
 
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