Current Conditions

Belmont, California

71°F22°C

Partly Cloudy

Wind

W 4 mph7 km/h

Humidity

63%

Cloud Cover

85%

As of Tuesday, September 8, 2026 at 8:41 PM PDT

Today's Outlook

Night

Mostly cloudy, with a low around 67°F19°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 88°F31°C	Low 67°F19°C	Precip 0 in0 mm—	Cloud 71%	Wind NW 4 mph6 km/h	Wednesday: Mostly cloudy and hot, with a high of 88°F31°C and morning low of 68°F20°C. Breezy from the NNW at 5 to 7 mph8 to 12 km/h. Wednesday Night: Mostly cloudy, with a low around 67°F19°C. Light wind from the WNW around 3 mph5 km/h.
Clear	High 81°F27°C	Low 65°F18°C	Precip 0 in0 mm—	Cloud 25%	Wind W 5 mph8 km/h	Thursday: Partly cloudy and warm, with a high of 81°F27°C and morning low of 68°F20°C. Breezy from the W at 6 to 8 mph10 to 13 km/h. Thursday Night: Mostly clear, with a low around 65°F18°C. Light wind from the WSW around 4 mph7 km/h.
Clear	High 72°F22°C	Low 61°F16°C	Precip 0 in0 mm—	Cloud 32%	Wind W 6 mph9 km/h	Friday: Partly cloudy and warm, with a high of 72°F22°C and morning low of 63°F17°C. Breezy from the W at 7 to 8 mph11 to 13 km/h. Friday Night: Partly cloudy, with a low around 61°F16°C. Light wind from the WSW around 5 mph8 km/h.
Clear	High 69°F21°C	Low 59°F15°C	Precip 0 in0 mm—	Cloud 21%	Wind W 8 mph13 km/h	Saturday: Mostly clear and warm, with a high of 69°F21°C and morning low of 61°F16°C. Breezy from the W at 9 to 11 mph15 to 18 km/h. Saturday Night: Mostly clear, with a low around 59°F15°C. Breezy from the W at 7 to 9 mph11 to 15 km/h.
Clear	High 72°F22°C	Low 58°F14°C	Precip 0 in0 mm—	Cloud 10%	Wind WNW 7 mph12 km/h	Sunday: Mostly clear and warm, with a high of 72°F22°C and morning low of 60°F16°C. Breezy from the WNW at 8 to 10 mph13 to 17 km/h. Sunday Night: Mostly clear, with a low around 58°F14°C. Breezy from the WNW at 6 to 7 mph10 to 12 km/h.
Clear	High 73°F23°C	Low 57°F14°C	Precip 0 in0 mm—	Cloud 21%	Wind W 5 mph8 km/h	Monday: Mostly clear and warm, with a high of 73°F23°C and morning low of 59°F15°C. Breezy from the WNW at 6 to 9 mph9 to 14 km/h. Monday Night: Mostly clear, with a low around 57°F14°C. Light wind from the W around 4 mph7 km/h.
Partly Cloudy	High 70°F21°C	Low 58°F15°C	Precip 0 in0 mm—	Cloud 51%	Wind W 6 mph9 km/h	Tuesday: Partly cloudy and warm, with a high of 70°F21°C and morning low of 60°F16°C. Breezy from the W at 6 to 8 mph10 to 13 km/h. Tuesday Night: Mostly cloudy, with a low around 58°F15°C. Light wind from the W around 5 mph8 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 9	88°F31°C	67°F19°C	0 in0 mm· —	71%	Partly Cloudy	NW 4 mph6 km/h
DayMostly cloudy and hot, with a high of 88°F31°C and morning low of 68°F20°C. Breezy from the NNW at 5 to 7 mph8 to 12 km/h. NightMostly cloudy, with a low around 67°F19°C. Light wind from the WNW around 3 mph5 km/h.
	ThursdaySep 10	81°F27°C	65°F18°C	0 in0 mm· —	25%	Clear	W 5 mph8 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 68°F20°C. Breezy from the W at 6 to 8 mph10 to 13 km/h. NightMostly clear, with a low around 65°F18°C. Light wind from the WSW around 4 mph7 km/h.
	FridaySep 11	72°F22°C	61°F16°C	0 in0 mm· —	32%	Clear	W 6 mph9 km/h
DayPartly cloudy and warm, with a high of 72°F22°C and morning low of 63°F17°C. Breezy from the W at 7 to 8 mph11 to 13 km/h. NightPartly cloudy, with a low around 61°F16°C. Light wind from the WSW around 5 mph8 km/h.
	SaturdaySep 12	69°F21°C	59°F15°C	0 in0 mm· —	21%	Clear	W 8 mph13 km/h
DayMostly clear and warm, with a high of 69°F21°C and morning low of 61°F16°C. Breezy from the W at 9 to 11 mph15 to 18 km/h. NightMostly clear, with a low around 59°F15°C. Breezy from the W at 7 to 9 mph11 to 15 km/h.
	SundaySep 13	72°F22°C	58°F14°C	0 in0 mm· —	10%	Clear	WNW 7 mph12 km/h
DayMostly clear and warm, with a high of 72°F22°C and morning low of 60°F16°C. Breezy from the WNW at 8 to 10 mph13 to 17 km/h. NightMostly clear, with a low around 58°F14°C. Breezy from the WNW at 6 to 7 mph10 to 12 km/h.
	MondaySep 14	73°F23°C	57°F14°C	0 in0 mm· —	21%	Clear	W 5 mph8 km/h
DayMostly clear and warm, with a high of 73°F23°C and morning low of 59°F15°C. Breezy from the WNW at 6 to 9 mph9 to 14 km/h. NightMostly clear, with a low around 57°F14°C. Light wind from the W around 4 mph7 km/h.
	TuesdaySep 15	70°F21°C	58°F15°C	0 in0 mm· —	51%	Partly Cloudy	W 6 mph9 km/h
DayPartly cloudy and warm, with a high of 70°F21°C and morning low of 60°F16°C. Breezy from the W at 6 to 8 mph10 to 13 km/h. NightMostly cloudy, with a low around 58°F15°C. Light wind from the W around 5 mph8 km/h.
	WednesdaySep 16	69°F21°C	59°F15°C	0 in0 mm· —	44%	Partly Cloudy	W 5 mph9 km/h
DayPartly cloudy and warm, with a high of 69°F21°C and morning low of 60°F15°C. Breezy from the W at 6 to 7 mph10 to 12 km/h. NightMostly cloudy, with a low around 59°F15°C. Light wind from the WSW around 5 mph8 km/h.
	ThursdaySep 17	71°F21°C	58°F14°C	0 in0 mm· —	38%	Clear	W 5 mph8 km/h
DayPartly cloudy and warm, with a high of 71°F21°C and morning low of 59°F15°C. Breezy from the W at 6 to 7 mph9 to 12 km/h. NightPartly cloudy, with a low around 58°F14°C. Light wind from the W around 4 mph7 km/h.
	FridaySep 18	70°F21°C	59°F15°C	0.01 in0.2 mm· 4%	43%	Partly Cloudy	W 5 mph9 km/h
DayPartly cloudy and warm, with a high of 70°F21°C and morning low of 59°F15°C. Breezy from the WNW at 6 to 8 mph10 to 13 km/h. NightPartly cloudy, with a low around 59°F15°C. Light wind from the W around 5 mph7 km/h.
	SaturdaySep 19	70°F21°C	59°F15°C	0 in0.1 mm· 3%	45%	Partly Cloudy	WNW 6 mph9 km/h
DayPartly cloudy and warm, with a high of 70°F21°C and morning low of 60°F15°C. Breezy from the WNW at 7 to 9 mph11 to 14 km/h. NightPartly cloudy, with a low around 59°F15°C. Light wind from the W around 5 mph8 km/h.
	SundaySep 20	70°F21°C	59°F15°C	0 in0.1 mm· 3%	44%	Partly Cloudy	W 6 mph9 km/h
DayPartly cloudy and warm, with a high of 70°F21°C and morning low of 60°F15°C. Breezy from the W at 6 to 8 mph10 to 13 km/h. NightPartly cloudy, with a low around 59°F15°C. Light wind from the W around 5 mph8 km/h.
	MondaySep 21	71°F22°C	59°F15°C	0 in0 mm· —	40%	Clear	W 5 mph8 km/h
DayPartly cloudy and warm, with a high of 71°F22°C and morning low of 60°F16°C. Breezy from the W at 6 to 8 mph10 to 12 km/h. NightPartly cloudy, with a low around 59°F15°C. Light wind from the W around 5 mph7 km/h.
	TuesdaySep 22	72°F22°C	59°F15°C	0 in0.1 mm· 3%	39%	Clear	W 5 mph8 km/h
DayPartly cloudy and warm, with a high of 72°F22°C and morning low of 61°F16°C. Breezy from the W at 6 to 8 mph9 to 12 km/h. NightPartly cloudy, with a low around 59°F15°C. Light wind from the W around 4 mph7 km/h.
	WednesdaySep 23	73°F23°C	60°F15°C	0 in0 mm· —	41%	Partly Cloudy	W 5 mph8 km/h
DayPartly cloudy and warm, with a high of 73°F23°C and morning low of 61°F16°C. Breezy from the W at 6 to 8 mph9 to 12 km/h. NightMostly cloudy, with a low around 60°F15°C. Light wind from the WSW around 4 mph7 km/h.

Nearby Cities

San Carlos1 mi2 km Foster City3 mi4 km Redwood City3 mi5 km San Mateo4 mi6 km Burlingame7 mi11 km Menlo Park7 mi11 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.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 37.5202°N, 122.2758°W·Elevation: 13m·Timezone: America/Los_Angeles·Population: 27,218