Current Conditions

Cupertino, California

85°F30°C

Partly Cloudy

Wind

W 5 mph9 km/h

Humidity

30%

Cloud Cover

71%

As of Tuesday, September 8, 2026 at 5:44 PM PDT

Today's Outlook

Day

Partly cloudy and hot, with a high of 87°F31°C and morning low of 80°F27°C. Light wind from the W around 4 mph6 km/h. Dry air.

Night

Overcast, with a low around 70°F21°C. Light wind from the WNW around 3 mph5 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Partly Cloudy	High 87°F31°C	Low 70°F21°C	Precip 0 in0 mm—	Cloud 66%	Wind WNW 3 mph5 km/h	Tuesday: Partly cloudy and hot, with a high of 87°F31°C and morning low of 80°F27°C. Light wind from the W around 4 mph6 km/h. Dry air. Tuesday Night: Overcast, with a low around 70°F21°C. Light wind from the WNW around 3 mph5 km/h.
Partly Cloudy	High 93°F34°C	Low 67°F19°C	Precip 0 in0 mm—	Cloud 64%	Wind N 4 mph7 km/h	Wednesday: Mostly cloudy and hot, with a high of 93°F34°C and morning low of 70°F21°C. Breezy from the NNW at 5 to 7 mph7 to 11 km/h. Wednesday Night: Mostly cloudy, with a low around 67°F19°C. Light wind from the N around 4 mph6 km/h.
Clear	High 88°F31°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 15%	Wind WNW 4 mph7 km/h	Thursday: Mostly clear and hot, with a high of 88°F31°C and morning low of 73°F23°C. Breezy from the WNW at 5 to 8 mph9 to 13 km/h. Thursday Night: Mostly clear, with a low around 68°F20°C. Light wind from the WNW around 3 mph5 km/h.
Clear	High 79°F26°C	Low 62°F17°C	Precip 0 in0 mm—	Cloud 10%	Wind W 4 mph7 km/h	Friday: Mostly clear and warm, with a high of 79°F26°C and morning low of 65°F18°C. Light wind from the W around 5 mph8 km/h. Friday Night: Mostly clear, with a low around 62°F17°C. Light wind from the W around 3 mph5 km/h.
Clear	High 74°F23°C	Low 58°F15°C	Precip 0 in0 mm—	Cloud 11%	Wind WNW 5 mph9 km/h	Saturday: Mostly clear and warm, with a high of 74°F23°C and morning low of 61°F16°C. Breezy from the WNW at 6 to 9 mph10 to 14 km/h. Saturday Night: Mostly clear, with a low around 58°F15°C. Light wind from the WNW around 5 mph7 km/h.
Clear	High 76°F25°C	Low 57°F14°C	Precip 0 in0 mm—	Cloud 10%	Wind NW 6 mph9 km/h	Sunday: Mostly clear and warm, with a high of 76°F25°C and morning low of 60°F16°C. Breezy from the NW at 7 to 9 mph11 to 14 km/h. Dry air. Sunday Night: Mostly clear, with a low around 57°F14°C. Light wind from the NW around 5 mph8 km/h.
Clear	High 77°F25°C	Low 57°F14°C	Precip 0 in0 mm—	Cloud 14%	Wind WNW 4 mph7 km/h	Monday: Mostly clear and warm, with a high of 77°F25°C and morning low of 59°F15°C. Breezy from the WNW at 5 to 8 mph8 to 13 km/h. Monday Night: Mostly clear, with a low around 57°F14°C. Light wind from the WNW around 4 mph6 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 8	87°F31°C	70°F21°C	0 in0 mm· —	66%	Partly Cloudy	WNW 3 mph5 km/h
DayPartly cloudy and hot, with a high of 87°F31°C and morning low of 80°F27°C. Light wind from the W around 4 mph6 km/h. Dry air. NightOvercast, with a low around 70°F21°C. Light wind from the WNW around 3 mph5 km/h.
	WednesdaySep 9	93°F34°C	67°F19°C	0 in0 mm· —	64%	Partly Cloudy	N 4 mph7 km/h
DayMostly cloudy and hot, with a high of 93°F34°C and morning low of 70°F21°C. Breezy from the NNW at 5 to 7 mph7 to 11 km/h. NightMostly cloudy, with a low around 67°F19°C. Light wind from the N around 4 mph6 km/h.
	ThursdaySep 10	88°F31°C	68°F20°C	0 in0 mm· —	15%	Clear	WNW 4 mph7 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 73°F23°C. Breezy from the WNW at 5 to 8 mph9 to 13 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the WNW around 3 mph5 km/h.
	FridaySep 11	79°F26°C	62°F17°C	0 in0 mm· —	10%	Clear	W 4 mph7 km/h
DayMostly clear and warm, with a high of 79°F26°C and morning low of 65°F18°C. Light wind from the W around 5 mph8 km/h. NightMostly clear, with a low around 62°F17°C. Light wind from the W around 3 mph5 km/h.
	SaturdaySep 12	74°F23°C	58°F15°C	0 in0 mm· —	11%	Clear	WNW 5 mph9 km/h
DayMostly clear and warm, with a high of 74°F23°C and morning low of 61°F16°C. Breezy from the WNW at 6 to 9 mph10 to 14 km/h. NightMostly clear, with a low around 58°F15°C. Light wind from the WNW around 5 mph7 km/h.
	SundaySep 13	76°F25°C	57°F14°C	0 in0 mm· —	10%	Clear	NW 6 mph9 km/h
DayMostly clear and warm, with a high of 76°F25°C and morning low of 60°F16°C. Breezy from the NW at 7 to 9 mph11 to 14 km/h. Dry air. NightMostly clear, with a low around 57°F14°C. Light wind from the NW around 5 mph8 km/h.
	MondaySep 14	77°F25°C	57°F14°C	0 in0 mm· —	14%	Clear	WNW 4 mph7 km/h
DayMostly clear and warm, with a high of 77°F25°C and morning low of 59°F15°C. Breezy from the WNW at 5 to 8 mph8 to 13 km/h. NightMostly clear, with a low around 57°F14°C. Light wind from the WNW around 4 mph6 km/h.
	TuesdaySep 15	73°F23°C	57°F14°C	0 in0 mm· —	33%	Clear	W 4 mph7 km/h
DayPartly cloudy and warm, with a high of 73°F23°C and morning low of 60°F16°C. Light wind from the W around 5 mph8 km/h. NightPartly cloudy, with a low around 57°F14°C. Light wind from the W around 4 mph6 km/h.
	WednesdaySep 16	72°F22°C	57°F14°C	0 in0 mm· —	34%	Clear	W 4 mph7 km/h
DayPartly cloudy and warm, with a high of 72°F22°C and morning low of 59°F15°C. Light wind from the WSW around 5 mph8 km/h. NightPartly cloudy, with a low around 57°F14°C. Light wind from the W around 3 mph6 km/h.
	ThursdaySep 17	75°F24°C	57°F14°C	0 in0 mm· —	26%	Clear	W 4 mph6 km/h
DayMostly clear and warm, with a high of 75°F24°C and morning low of 60°F15°C. Light wind from the W around 5 mph7 km/h. NightPartly cloudy, with a low around 57°F14°C. Light wind from the W around 3 mph5 km/h.
	FridaySep 18	75°F24°C	57°F14°C	0 in0 mm· —	26%	Clear	WNW 4 mph6 km/h
DayMostly clear and warm, with a high of 75°F24°C and morning low of 59°F15°C. Light wind from the WNW around 5 mph7 km/h. NightPartly cloudy, with a low around 57°F14°C. Light wind from the WNW around 3 mph5 km/h.
	SaturdaySep 19	76°F25°C	58°F14°C	0 in0 mm· —	33%	Clear	WNW 4 mph6 km/h
DayPartly cloudy and warm, with a high of 76°F25°C and morning low of 59°F15°C. Light wind from the WNW around 5 mph7 km/h. NightPartly cloudy, with a low around 58°F14°C. Light wind from the WNW around 3 mph5 km/h.
	SundaySep 20	76°F24°C	58°F14°C	0.01 in0.3 mm· 2%	37%	Clear	W 4 mph6 km/h
DayPartly cloudy and warm, with a high of 76°F24°C and morning low of 60°F15°C. Light wind from the W around 5 mph7 km/h. NightPartly cloudy, with a low around 58°F14°C. Light wind from the WNW around 3 mph5 km/h.
	MondaySep 21	76°F24°C	58°F15°C	0.01 in0.2 mm· 3%	41%	Partly Cloudy	W 4 mph6 km/h
DayPartly cloudy and warm, with a high of 76°F24°C and morning low of 60°F15°C. Light wind from the W around 5 mph8 km/h. NightPartly cloudy, with a low around 58°F15°C. Light wind from the W around 3 mph5 km/h.
	TuesdaySep 22	77°F25°C	58°F15°C	0.01 in0.2 mm· 4%	37%	Clear	WNW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 60°F16°C. Light wind from the W around 5 mph8 km/h. NightPartly cloudy, with a low around 58°F15°C. Light wind from the WNW around 3 mph5 km/h.

Nearby Cities

Sunnyvale3 mi5 km Saratoga4 mi7 km Santa Clara5 mi8 km Campbell5 mi8 km Mountain View5 mi8 km Los Altos6 mi10 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 37.3230°N, 122.0322°W·Elevation: 72m·Timezone: America/Los_Angeles·Population: 60,572