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 >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

NA

73°F

23°C

Humidity 21%
Wind Speed NNW 8 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 20 Mar 07:40 PM PDT
Extended Forecast for

4 Miles ENE Danville CA

  • Overnight

    Overnight: Partly cloudy, with a low around 53. South wind around 5 mph.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 82. Light west northwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 48. West wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 21 mph.

    Low: 48 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 79. West northwest wind 3 to 7 mph.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 47. Southwest wind around 9 mph.

    Low: 47 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Monday Night

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

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 53. South wind around 5 mph.
Saturday
Mostly sunny, with a high near 82. Light west northwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 48. West wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 21 mph.
Sunday
Sunny, with a high near 79. West northwest wind 3 to 7 mph.
Sunday Night
Mostly clear, with a low around 47. Southwest wind around 9 mph.
Monday
Sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
Mostly sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 47.
Thursday
Sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Danville CA
 37.85°N 121.94°W (Elev. 1362 ft)
Last Update:
2:22 am PDT Mar 21, 2026
Forecast Valid:
2am PDT Mar 21, 2026-6pm PDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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Chance of Precipitation