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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Mountain View, Moffett Field (KNUQ)

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

Overcast

59°F

15°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 20 Sep 04:55 AM PDT
Extended Forecast for

Sunnyvale CA

  • Today

    Today: Mostly cloudy, with a high near 74. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 74 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. North northwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 76. Calm wind becoming northwest 5 to 8 mph in the afternoon.

    High: 76 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 56. Northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 56 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 74. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 56. North northwest wind around 5 mph becoming calm in the evening.
Monday
Partly sunny, then gradually becoming sunny, with a high near 76. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 56. Northwest wind 5 to 8 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 78. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
Sunny, with a high near 89.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Mostly sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sunnyvale CA
 37.38°N 122.05°W (Elev. 118 ft)
Last Update:
1:26 am PDT Sep 20, 2026
Forecast Valid:
5am PDT Sep 20, 2026-6pm PDT Sep 26, 2026
 
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Additional Resources

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