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

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 >

Hazardous Weather Conditions

Current conditions at

LA HONDA (LAHC1)

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

NA

92°F

33°C

Humidity 22%
Wind Speed NNE 3 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Heat Index89°F (32°C)
Last update 20 Mar 02:07 PM PDT
Extended Forecast for

5 Miles WNW Portola Valley CA

Heat Advisory March 20, 02:58pm until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 20, 02:58pm until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • This Afternoon

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. West northwest wind 6 to 8 mph becoming south in the evening.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 72. Northwest wind 9 to 13 mph, with gusts as high as 25 mph.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 49. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 49 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 70. Northwest wind around 8 mph.

    High: 70 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 89. North wind around 6 mph.
Tonight
Mostly clear, with a low around 57. West northwest wind 6 to 8 mph becoming south in the evening.
Saturday
Mostly sunny, with a high near 72. Northwest wind 9 to 13 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 49. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 70. Northwest wind around 8 mph.
Sunday Night
Mostly clear, with a low around 48.
Monday
Sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 50.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Mostly sunny, with a high near 70.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Portola Valley CA
 37.4°N 122.31°W (Elev. 2198 ft)
Last Update:
2:07 pm PDT Mar 20, 2026
Forecast Valid:
2pm PDT Mar 20, 2026-6pm PDT Mar 26, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation