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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

K2MRS Orinda (D1132)

Lat: 37.87444°NLon: 122.15819°WElev: 688.98ft.

NA

80°F

27°C

Humidity 43%
Wind Speed W 0 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 55°F (13°C)
Visibility NA
Heat Index80°F (27°C)
Last update 27 Aug 06:11 PM PDT
Extended Forecast for

Walnut Creek CA

  • Tonight

    Tonight: A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 62. South wind 6 to 8 mph.

    Low: 62 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 84. Southwest wind 6 to 11 mph.

    High: 84 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. South wind around 8 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81. Southwest wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. South southwest wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 62. South wind 6 to 8 mph.
Friday
A 20 percent chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 84. Southwest wind 6 to 11 mph.
Friday Night
Mostly clear, with a low around 58. South wind around 8 mph.
Saturday
Sunny, with a high near 81. Southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 56. South southwest wind 8 to 10 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 56.
Monday
Sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
A slight chance of showers. Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Walnut Creek CA
 37.9°N 122.07°W (Elev. 203 ft)
Last Update:
1:42 pm PDT Aug 27, 2026
Forecast Valid:
6pm PDT Aug 27, 2026-6pm PDT Sep 3, 2026
 
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Additional Resources

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Chance of Precipitation