Dangerous Heat in the Central and Southern U.S.; Thunderstorms and Heavy Rain in the Northern Plains

Dangerous, prolonged heat is expected across portions of the Central and Southeast U.S. through July. Scattered severe thunderstorms are expected over parts of the northern Plains into the upper Mississippi Valley Tuesday, with damaging winds and large hail as the primary threats. Heavy rainfall could lead to areas of flooding across the northern Plains, Upper Midwest, Southeast and Southwest. Read More >

Current conditions at

Mount Diablo Summit Museum and Trailhead Rooftop (SJS02)

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

NA

54°F

12°C

Humidity 49%
Wind Speed WSW 19 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 21 Jul 11:05 PM PDT
Extended Forecast for

4 Miles ENE Danville CA

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around 56. West southwest wind around 8 mph, with gusts as high as 21 mph.

    Low: 56 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 73. West southwest wind 7 to 9 mph, with gusts as high as 20 mph.

    High: 73 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 53. West southwest wind 5 to 7 mph.

    Low: 53 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 78. West southwest wind 5 to 9 mph.

    High: 78 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. West southwest wind 5 to 9 mph.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around 56. West southwest wind around 8 mph, with gusts as high as 21 mph.
Tuesday
Mostly cloudy, with a high near 73. West southwest wind 7 to 9 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 53. West southwest wind 5 to 7 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 78. West southwest wind 5 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 53. West southwest wind 5 to 9 mph.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 53.
Saturday
Mostly sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
Sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 53.
Monday
Sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Danville CA
 37.85°N 121.94°W (Elev. 1362 ft)
3:03 pm PDT Jul 21, 2025
11pm PDT Jul 21, 2025-6pm PDT Jul 28, 2025
 
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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