Severe Thunderstorms and Heavy Rain in the Mississippi Valley; Critical Fire Weather in the Southern Plains

Severe thunderstorms will persist tonight across the Middle Mississippi Valley, producing damaging winds, large to very large hail and several tornadoes. Low humidity and windy conditions will continue to produce elevated to critical fire weather conditions across the southern High Plains into midweek. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

44°F

7°C

Humidity 77%
Wind Speed WSW 7 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Wind Chill40°F (4°C)
Last update 27 Apr 07:55 PM PDT
Extended Forecast for

4 Miles SSE Clayton CA

  • Tonight

    Tonight: Partly cloudy, with a low around 46. Southwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 46 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 63. Southwest wind 6 to 8 mph becoming north northwest in the morning.

    High: 63 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 51. West southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 68. West wind 6 to 9 mph.

    High: 68 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50. Southwest wind around 14 mph, with gusts as high as 24 mph.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Friday Night

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

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 46. Southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 63. Southwest wind 6 to 8 mph becoming north northwest in the morning.
Tuesday Night
Clear, with a low around 51. West southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 68. West wind 6 to 9 mph.
Wednesday Night
Mostly clear, with a low around 50. Southwest wind around 14 mph, with gusts as high as 24 mph.
Thursday
Sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 51.
Monday
A slight chance of rain. Mostly sunny, with a high near 61.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.9°N 121.9°W (Elev. 1814 ft)
8:51 pm PDT Apr 27, 2026
11pm PDT Apr 27, 2026-6pm PDT May 4, 2026
 
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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