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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Current conditions at

LA HONDA (LAHC1)

Lat: 37.30523°NLon: 122.25525°WElev: 804.0ft.

NA

57°F

14°C

Humidity 89%
Wind Speed SE 2 MPH
Barometer NA
Dewpoint 54°F (12°C)
Visibility NA
Last update 18 Jun 02:07 AM PDT
Extended Forecast for

4 Miles S Portola Valley CA

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 58. Calm wind.

    Low: 58 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 68. South wind 3 to 6 mph.

    High: 68 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 56. South wind 3 to 5 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Juneteenth

    Juneteenth: Cloudy through mid morning, then gradual clearing, with a high near 63. South wind around 6 mph.

    High: 63 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 55. South southwest wind around 6 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 58. Calm wind.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 68. South wind 3 to 6 mph.
Thursday Night
Increasing clouds, with a low around 56. South wind 3 to 5 mph.
Juneteenth
Cloudy through mid morning, then gradual clearing, with a high near 63. South wind around 6 mph.
Friday Night
Mostly cloudy, with a low around 55. South southwest wind around 6 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Partly cloudy, with a low around 52.
Monday
Mostly sunny, with a high near 69.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
Mostly sunny, with a high near 71.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Portola Valley CA
 37.3°N 122.23°W (Elev. 1447 ft)
Last Update:
2:37 am PDT Jun 18, 2026
Forecast Valid:
2am PDT Jun 18, 2026-6pm PDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

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