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

Mountain View, Moffett Field (KNUQ)

Lat: 37.40583°NLon: 122.04806°WElev: 33.0ft.

Overcast

64°F

18°C

Humidity 82%
Wind Speed N 11 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 28 Aug 12:15 PM PDT
Extended Forecast for

Cupertino CA

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms.  Mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming north northwest 5 to 9 mph.

    High: 78 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 58. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 77. Calm wind becoming north northwest 5 to 9 mph in the afternoon.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. Northwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 78. Calm wind becoming west around 6 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 75.

    High: 75 °F

    Patchy Fog
    then Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming north northwest 5 to 9 mph.
Tonight
Mostly clear, with a low around 58. North northwest wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 77. Calm wind becoming north northwest 5 to 9 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 56. Northwest wind 5 to 8 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 78. Calm wind becoming west around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 56.
Monday
Mostly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 75.
Tuesday Night
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 57.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 76.
Wednesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 57.
Thursday
Patchy fog. Otherwise, mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Cupertino CA
 37.33°N 122.04°W (Elev. 243 ft)
11:26 am PDT Aug 28, 2026
12pm PDT Aug 28, 2026-6pm PDT Sep 3, 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