Fire Weather Issues; Pacific System Moving Inland

Dry fuels, strong winds and dry weather will continue to bring elevated to critical fire weather conditions to the areas of the Plains, Midwest and Southeast today. A Pacific storm system will bring low elevation rain and heavy high elevation mountain snow to California through early week, expanding into the Pacific Northwest, Great Basin, and southern California on Tuesday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

50°F

10°C

Humidity 33%
Wind Speed S 11 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Wind Chill46°F (8°C)
Last update 20 Apr 12:15 PM PDT
Extended Forecast for

2 Miles S Clayton CA

  • This Afternoon

    This Afternoon: Rain likely, mainly between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm.  Mostly cloudy, with a high near 68. South southwest wind around 15 mph, with gusts as high as 28 mph.  Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Showers
    Likely

  • Tonight

    Tonight: Rain and possibly a thunderstorm.  Low around 53. South southwest wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 32 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 53 °F

    Rain

  • Tuesday

    Tuesday: Rain likely and possibly a thunderstorm, then showers and possibly a thunderstorm after 10am.  High near 61. Southwest wind 7 to 13 mph, with gusts as high as 25 mph.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 61 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then rain likely, mainly between 8pm and 11pm.  Mostly cloudy, with a low around 49. Southwest wind 9 to 13 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Showers
    Likely then
    Chance Rain

  • Wednesday

    Wednesday: A 30 percent chance of rain before 11am.  Mostly sunny, with a high near 63. South southwest wind 7 to 9 mph.  New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Chance Rain
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Rain likely, mainly between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 68. South southwest wind around 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and possibly a thunderstorm. Low around 53. South southwest wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Rain likely and possibly a thunderstorm, then showers and possibly a thunderstorm after 10am. High near 61. Southwest wind 7 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers likely and possibly a thunderstorm before 8pm, then rain likely, mainly between 8pm and 11pm. Mostly cloudy, with a low around 49. Southwest wind 9 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 30 percent chance of rain before 11am. Mostly sunny, with a high near 63. South southwest wind 7 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 69.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 70.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Clayton CA
 37.92°N 121.93°W (Elev. 600 ft)
1:26 pm PDT Apr 20, 2026
2pm PDT Apr 20, 2026-6pm PDT Apr 26, 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