California · NWS MTR office

Cupertino, CA weather

It is 54°F and partly cloudy at Mountain View, Moffett Field as of Oct 27, 10:35 PM PDT. Tonight: Partly Cloudy then Patchy Fog, low near 46°F. Forecast from the National Weather Service, issued Oct 27, 3:07 PM PDT.

Updated Oct 27, 11:22 PM PDT (snapshot)

Current conditions

Temperature

54°F

Partly Cloudy

Wind

Calm

Humidity 77% · dew point 46°F

Pressure · visibility

30.02 inHg

Visibility 9 mi

Observed at Mountain View, Moffett Field (KNUQ), Oct 27, 10:35 PM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Cupertino forecast zone right now.

Around the NWS MTR forecast area

2 active alerts cover zones served by the MTR office near Cupertino:

  • Coastal Flood Advisory (2)

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Cupertino (local time)
TimeTempForecastPrecip. chanceWind
Tue 11 PM53°FPartly Cloudy0%W 2 mph
Wed 12 AM52°FPartly Cloudy0%W 2 mph
Wed 1 AM51°FPartly Cloudy0%W 1 mph
Wed 2 AM49°FPartly Cloudy0%W 1 mph
Wed 3 AM48°FPartly Cloudy0%W 1 mph
Wed 4 AM47°FPartly Cloudy0%W 1 mph
Wed 5 AM46°FPatchy Fog0%W 1 mph
Wed 6 AM46°FPatchy Fog0%W 1 mph
Wed 7 AM46°FPatchy Fog0%WNW 2 mph
Wed 8 AM46°FPatchy Fog0%WNW 2 mph
Wed 9 AM52°FSunny0%WNW 2 mph
Wed 10 AM58°FSunny0%NW 2 mph
Wed 11 AM61°FSunny0%NNW 5 mph
Wed 12 PM64°FSunny0%NNW 5 mph
Wed 1 PM67°FSunny0%NNW 6 mph
Wed 2 PM68°FSunny0%NNW 7 mph
Wed 3 PM68°FSunny0%NNW 7 mph
Wed 4 PM68°FMostly Sunny0%NNW 7 mph
Wed 5 PM68°FPartly Sunny0%NNW 5 mph
Wed 6 PM65°FMostly Cloudy0%NNW 5 mph
Wed 7 PM62°FMostly Cloudy0%NNW 5 mph
Wed 8 PM58°FMostly Cloudy0%NNW 1 mph
Wed 9 PM57°FMostly Cloudy0%NNW 1 mph
Wed 10 PM55°FMostly Cloudy0%NNW 1 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Cupertino can differ.

7-day forecast

Tonight

Low 46°F

Patchy fog after 5am. Partly cloudy, with a low around 46. West wind around 2 mph.

Wednesday

High 69°F·Low 50°F

Patchy fog before 9am. Sunny, with a high near 69. Northwest wind 1 to 7 mph.

Wednesday Night: Mostly cloudy, with a low around 50. South southeast wind 0 to 5 mph.

Thursday

High 69°F·Low 48°F

Mostly cloudy, with a high near 69. South wind 0 to 5 mph.

Thursday Night: Patchy fog after 5am. Mostly cloudy, with a low around 48. Southwest wind 1 to 5 mph.

Friday

High 66°F·Low 45°F

Patchy fog before 9am. Mostly sunny, with a high near 66.

Friday Night: Partly cloudy, with a low around 45.

Saturday

High 63°F·Low 45°F

Patchy fog before 9am, then a slight chance of rain. Partly sunny, with a high near 63.

Saturday Night: A slight chance of rain before 4am. Partly cloudy, with a low around 45.

Sunday

High 66°F·Low 47°F

Patchy fog before 8am. Sunny, with a high near 66.

Sunday Night: Mostly clear, with a low around 47.

Monday

High 70°F·Low 50°F

Mostly sunny, with a high near 70.

Monday Night: A slight chance of rain after 4am. Partly cloudy, with a low around 50.

Tuesday

High 70°F

A chance of rain before 5pm. Partly sunny, with a high near 70.

Nearby cities

Larger cities in the area

Other cities in Santa Clara County

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
Cupertino is served by the National Weather Service MTR forecast office, forecast zone CAZ513, county zone CAC085.
Location used
The Census Bureau's internal point for Cupertino (37.3194, -122.0450), in Santa Clara County. Population: 58,710 (2024 estimate), number 157 of the 296 California cities on this site.
Radar
Nearest NWS radar: KMUX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/37.3194,-122.045 (forecast issued Oct 27, 3:07 PM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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