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

Heavy Rainfall Continues in Florida; Critical Fire Weather in the Southeast; Heavy Rain and Flooding Concerns in Hawaii

Thunderstorms and periods of heavy to excessive rainfall will continue over Florida through Thursday. Gusty winds and low humidity will promote elevated to critical fire weather conditions from central Georgia into north-central North Carolina Wednesday. A Kona Low is expected to bring strong winds, widespread heavy rainfall, and flooding concerns to the island chain through the weekend. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

55°F

13°C

Humidity 57%
Wind Speed NW 16 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 08 Apr 03:05 AM PDT
Extended Forecast for

Clayton CA

  • Overnight

    Overnight: Mostly clear, with a low around 54. South southwest wind around 9 mph, with gusts as high as 18 mph.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 74. West wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56. Southwest wind 7 to 14 mph, with gusts as high as 23 mph.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after 11am. Mostly sunny, with a high near 71. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 71 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 56. West southwest wind 6 to 13 mph, with gusts as high as 22 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Chance Rain

  • Friday

    Friday: A chance of rain, then showers and possibly a thunderstorm after 11am. High near 64. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 64 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 8pm, then rain likely, mainly between 8pm and 11pm. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of rain, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 62.

    High: 62 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of rain. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 54. South southwest wind around 9 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 74. West wind 8 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 56. Southwest wind 7 to 14 mph, with gusts as high as 23 mph.
Thursday
A 20 percent chance of rain after 11am. Mostly sunny, with a high near 71. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 56. West southwest wind 6 to 13 mph, with gusts as high as 22 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of rain, then showers and possibly a thunderstorm after 11am. High near 64. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers likely and possibly a thunderstorm before 8pm, then rain likely, mainly between 8pm and 11pm. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Saturday
A chance of rain, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 62.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 49.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 58.
Sunday Night
A slight chance of rain. Partly cloudy, with a low around 47.
Monday
Sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
Last Update:
1:26 am PDT Apr 8, 2026
Forecast Valid:
3am PDT Apr 8, 2026-6pm PDT Apr 14, 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