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

San Jose, San Jose International Airport (KSJC)

Lat: 37.35917°NLon: 121.92417°WElev: 59.0ft.

Mostly Cloudy

63°F

17°C

Humidity 72%
Wind Speed N 3 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 20 Sep 10:53 AM PDT
Extended Forecast for

Santa Clara CA

  • Today

    Today: Mostly cloudy, with a high near 76. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 76 °F

    Mostly Cloudy

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 56. North northwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 78. Calm wind becoming north northwest 5 to 8 mph in the afternoon.

    High: 78 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 56. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 56 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 80. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Tuesday Night

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

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 76. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Tonight
Patchy fog after 3am. Otherwise, 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 78. Calm wind becoming north northwest 5 to 8 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 56. North northwest wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 80. Calm wind becoming west northwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Mostly sunny, with a high near 87.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Santa Clara CA
 37.35°N 121.96°W (Elev. 89 ft)
Last Update:
9:46 am PDT Sep 20, 2026
Forecast Valid:
11am PDT Sep 20, 2026-6pm PDT Sep 26, 2026
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation