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Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

37°F

3°C

Humidity 100%
Wind Speed SSW 13 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Wind Chill29°F (-2°C)
Last update 12 Apr 01:30 PM PDT
Extended Forecast for

4 Miles ENE Danville CA

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm. High near 56. Southwest wind 14 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 56 °F

    Showers

  • Tonight

    Tonight: A chance of showers before 11pm, then a chance of showers after midnight. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 42. West southwest wind 5 to 10 mph becoming light southwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Chance
    Showers and
    Patchy Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 62. Calm wind becoming west northwest 5 to 8 mph in the afternoon.

    High: 62 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. Southwest wind around 8 mph.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64. Southwest wind 7 to 9 mph, with gusts as high as 20 mph.

    High: 64 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm. High near 56. Southwest wind 14 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers before 11pm, then a chance of showers after midnight. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 42. West southwest wind 5 to 10 mph becoming light southwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 62. Calm wind becoming west northwest 5 to 8 mph in the afternoon.
Monday Night
Mostly clear, with a low around 43. Southwest wind around 8 mph.
Tuesday
Sunny, with a high near 64. Southwest wind 7 to 9 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Partly sunny, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Sunny, with a high near 67.
Thursday Night
Clear, with a low around 43.
Friday
Sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 42.
Saturday
Sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Danville CA
 37.85°N 121.94°W (Elev. 1362 ft)
Last Update:
1:26 pm PDT Apr 12, 2026
Forecast Valid:
1pm PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation