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

Areas of Excessive Rainfall; Watching for Tropical Cyclone Development in the Atlantic

Heavy to excessive rainfall Wednesday may bring areas of flash and urban flooding over portions of the Ohio and Tennessee Valleys. In Arizona and New Mexico, heavy to excessive rainfall from monsoon thunderstorms may bring isolated flash and urban flooding Thursday into Saturday. Two tropical waves in the Atlantic are being monitored for tropical cyclone formation within the next few days. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

65°F

18°C

Humidity 43%
Wind Speed WSW 28 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 24 Sep 04:20 AM PDT
Extended Forecast for

8 Miles NNE Livermore Municipal CA

  • Today

    Today: A slight chance of showers before 2pm, then a slight chance of showers and thunderstorms between 2pm and 5pm, then a slight chance of showers after 5pm. Partly sunny, with a high near 79. West southwest wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 20%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a slight chance of showers after 11pm. Mostly cloudy, with a low around 68. West southwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 81. West wind around 6 mph.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64. West southwest wind around 7 mph.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. West southwest wind around 5 mph becoming calm in the morning.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 66.

    Low: 66 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers before 2pm, then a slight chance of showers and thunderstorms between 2pm and 5pm, then a slight chance of showers after 5pm. Partly sunny, with a high near 79. West southwest wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 20%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A slight chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a slight chance of showers after 11pm. Mostly cloudy, with a low around 68. West southwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Mostly sunny, with a high near 81. West wind around 6 mph.
Thursday Night
Mostly clear, with a low around 64. West southwest wind around 7 mph.
Friday
Sunny, with a high near 87. West southwest wind around 5 mph becoming calm in the morning.
Friday Night
Clear, with a low around 66.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 64.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 74.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
8 Miles NNE Livermore Municipal CA
 37.83°N 121.79°W (Elev. 2001 ft)
Last Update:
2:10 am PDT Sep 24, 2025
Forecast Valid:
4am PDT Sep 24, 2025-6pm PDT Sep 30, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation