Current Conditions

Sunnyvale, California

56°F13°C
Clear

Wind

SSW 2 mph4 km/h

Humidity

94%

Cloud Cover

52%

As of Wednesday, September 23, 2026 at 1:20 AM PDT

Today's Outlook

Day

Mostly clear and warm, with a high of 80°F27°C and morning low of 57°F14°C. Light wind from the WNW around 4 mph6 km/h.

Night

Partly cloudy, with a low around 55°F13°C. Light wind from the W around 3 mph4 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
ClearHigh 80°F27°CLow 55°F13°CPrecip 0 in0 mmCloud 24%Wind WNW 3 mph5 km/hWednesday: Mostly clear and warm, with a high of 80°F27°C and morning low of 57°F14°C. Light wind from the WNW around 4 mph6 km/h. Wednesday Night: Partly cloudy, with a low around 55°F13°C. Light wind from the W around 3 mph4 km/h.
Partly CloudyHigh 80°F27°CLow 59°F15°CPrecip 0 in0 mmCloud 52%Wind W 4 mph6 km/hThursday: Mostly cloudy and warm, with a high of 80°F27°C and morning low of 61°F16°C. Breezy from the W at 5 to 7 mph7 to 11 km/h. Thursday Night: Mostly cloudy, with a low around 59°F15°C. Light wind from the W around 3 mph5 km/h.
ClearHigh 75°F24°CLow 58°F14°CPrecip 0 in0 mmCloud 24%Wind WNW 5 mph8 km/hFriday: Mostly clear and warm, with a high of 75°F24°C and morning low of 61°F16°C. Breezy from the WNW at 6 to 8 mph9 to 12 km/h. Friday Night: Partly cloudy, with a low around 58°F14°C. Light wind from the WNW around 4 mph6 km/h.
ClearHigh 73°F23°CLow 55°F13°CPrecip 0 in0 mmCloud 34%Wind WSW 4 mph6 km/hSaturday: Partly cloudy and warm, with a high of 73°F23°C and morning low of 57°F14°C. Light wind from the WSW around 4 mph7 km/h. Dry air. Saturday Night: Partly cloudy, with a low around 55°F13°C. Light wind from the W around 3 mph5 km/h.
ClearHigh 70°F21°CLow 54°F12°CPrecip 0 in0 mmCloud 35%Wind WSW 4 mph7 km/hSunday: Partly cloudy and warm, with a high of 70°F21°C and morning low of 58°F14°C. Light wind from the WSW around 5 mph8 km/h. Dry air. Sunday Night: Partly cloudy, with a low around 54°F12°C. Light wind from the WSW around 3 mph5 km/h.
ClearHigh 74°F23°CLow 55°F13°CPrecip 0 in0 mmCloud 21%Wind WNW 4 mph6 km/hMonday: Mostly clear and warm, with a high of 74°F23°C and morning low of 56°F14°C. Light wind from the WNW around 4 mph7 km/h. Monday Night: Mostly clear, with a low around 55°F13°C. Light wind from the W around 3 mph5 km/h.
ClearHigh 80°F27°CLow 57°F14°CPrecip 0 in0 mmCloud 14%Wind WNW 3 mph5 km/hTuesday: Mostly clear and warm, with a high of 80°F27°C and morning low of 58°F15°C. Light wind from the WNW around 4 mph6 km/h. Dry air. Tuesday Night: Mostly clear, with a low around 57°F14°C. Light wind from the WNW around 3 mph5 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 2380°F27°C55°F13°C0 in0 mm· —24%ClearWNW 3 mph5 km/h
ThursdaySep 2480°F27°C59°F15°C0 in0 mm· —52%Partly CloudyW 4 mph6 km/h
FridaySep 2575°F24°C58°F14°C0 in0 mm· —24%ClearWNW 5 mph8 km/h
SaturdaySep 2673°F23°C55°F13°C0 in0 mm· —34%ClearWSW 4 mph6 km/h
SundaySep 2770°F21°C54°F12°C0 in0 mm· —35%ClearWSW 4 mph7 km/h
MondaySep 2874°F23°C55°F13°C0 in0 mm· —21%ClearWNW 4 mph6 km/h
TuesdaySep 2980°F27°C57°F14°C0 in0 mm· —14%ClearWNW 3 mph5 km/h
WednesdaySep 3081°F27°C59°F15°C0.01 in0.3 mm· 3%27%ClearWNW 3 mph5 km/h
ThursdayOct 178°F26°C60°F15°C0.02 in0.5 mm· 3%40%ClearWNW 4 mph6 km/h
FridayOct 280°F27°C59°F15°C0.01 in0.3 mm· 3%27%ClearNW 4 mph6 km/h
SaturdayOct 382°F28°C60°F16°C0 in0.1 mm· 2%22%ClearNW 3 mph5 km/h
SundayOct 482°F28°C61°F16°C0.02 in0.5 mm· 4%21%ClearWNW 4 mph6 km/h
MondayOct 580°F27°C60°F16°C0.02 in0.4 mm· 3%21%ClearWNW 3 mph5 km/h
TuesdayOct 680°F27°C60°F16°C0.02 in0.5 mm· 5%20%ClearWNW 4 mph6 km/h
WednesdayOct 780°F26°C60°F16°C0.02 in0.6 mm· 4%22%ClearWNW 4 mph6 km/h

Nearby Cities

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: 37.3688°N, 122.0363°W·Elevation: 39m·Timezone: America/Los_Angeles·Population: 155,805