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

Heavy Rainfall 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; and will begin to impact the central Plains today. Dry and gusty conditions will promote elevated to critical fire weather conditions in the Southeast. 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

61°F

16°C

Humidity 63%
Wind Speed WNW 4 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Last update 08 Apr 01:35 PM PDT
Extended Forecast for

Clayton CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 74. West wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: 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 slight chance of showers between 2pm and 3pm. Mostly sunny, with a high near 70. Southwest wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    High: 70 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 56. West southwest wind 6 to 14 mph, with gusts as high as 22 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers, then showers and possibly a thunderstorm after 11am. High near 64. Southwest wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 55. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 59. Chance of precipitation is 80%.

    High: 59 °F

    Showers

  • Saturday Night

    Saturday Night: Rain likely. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Rain Likely

  • Sunday

    Sunday: Rain likely, mainly after 11am. Partly sunny, with a high near 56.

    High: 56 °F

    Rain Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 74. West wind 11 to 14 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a low around 56. Southwest wind 7 to 14 mph, with gusts as high as 23 mph.
Thursday
A slight chance of showers between 2pm and 3pm. Mostly sunny, with a high near 70. Southwest wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 56. West southwest wind 6 to 14 mph, with gusts as high as 22 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers, then showers and possibly a thunderstorm after 11am. High near 64. Southwest wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 55. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 59. Chance of precipitation is 80%.
Saturday Night
Rain likely. Mostly cloudy, with a low around 49.
Sunday
Rain likely, mainly after 11am. Partly sunny, with a high near 56.
Sunday Night
A chance of rain before 11pm. Partly cloudy, with a low around 46.
Monday
Sunny, with a high near 62.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Mostly sunny, with a high near 66.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
Last Update:
2:11 pm PDT Apr 8, 2026
Forecast Valid:
2pm PDT Apr 8, 2026-6pm PDT Apr 14, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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