Current Conditions

Belmont, Massachusetts

69°F20°C

Partly Cloudy

Wind

SE 4 mph6 km/h

Humidity

74%

Cloud Cover

81%

As of Tuesday, September 8, 2026 at 8:05 PM EDT

Today's Outlook

Night

Overcast, with a low around 64°F18°C. Light wind from the SSE around 3 mph5 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Partly Cloudy	High 77°F25°C	Low 64°F18°C	Precip 0 in0.1 mm4%	Cloud 72%	Wind N 4 mph7 km/h	Tuesday: Mostly cloudy and warm, with a high of 77°F25°C. Light wind from the NNW around 5 mph8 km/h. Tuesday Night: Overcast, with a low around 64°F18°C. Light wind from the SSE around 3 mph5 km/h.
Light Rain	High 77°F25°C	Low 60°F16°C	Precip 0.06 in1.6 mm67%	Cloud 96%	Wind SSW 8 mph12 km/h	Wednesday: Overcast and warm, with a high of 77°F25°C and morning low of 63°F17°C. Breezy from the S at 7 to 11 mph11 to 18 km/h. Wednesday Night: Overcast, with a low around 60°F16°C. Breezy from the SSW at 8 to 14 mph13 to 23 km/h. 67% chance of light rain in the evening.
Showers	High 85°F29°C	Low 71°F22°C	Precip 0.2 in5.1 mm91%	Cloud 68%	Wind WSW 12 mph19 km/h	Thursday: Mostly cloudy and warm, with a high of 85°F29°C and morning low of 71°F22°C. Breezy from the W at 11 to 13 mph18 to 21 km/h. 71% chance of showers in the morning. Thursday Night: Overcast, with a low around 72°F22°C. Windy from the WSW at 13 to 16 mph20 to 25 km/h. 91% chance of light rain overnight.
Clear	High 76°F24°C	Low 60°F16°C	Precip 0 in0 mm—	Cloud 15%	Wind NW 7 mph11 km/h	Friday: Mostly clear and warm, with a high of 76°F24°C and morning low of 65°F18°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. Dry air. Friday Night: Mostly clear, with a low around 60°F16°C. Breezy from the NW at 6 to 8 mph10 to 13 km/h.
Drizzle	High 76°F24°C	Low 54°F12°C	Precip 0.01 in0.3 mm17%	Cloud 65%	Wind S 6 mph9 km/h	Saturday: Mostly cloudy and warm, with a high of 76°F24°C and morning low of 59°F15°C. Breezy from the SSE at 5 to 8 mph8 to 13 km/h. Saturday Night: Mostly cloudy, with a low around 54°F12°C. Breezy from the SSW at 6 to 9 mph10 to 14 km/h. 17% chance of drizzle overnight.
Rain	High 76°F24°C	Low 66°F19°C	Precip 0.54 in13.6 mm67%	Cloud 78%	Wind SSW 7 mph12 km/h	Sunday: Overcast and warm, with a high of 76°F24°C and morning low of 67°F19°C. Breezy from the SSW at 7 mph11 km/h. 67% chance of rain throughout the day. Humid. Sunday Night: Mostly cloudy, with a low around 66°F19°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 60% chance of showers throughout the night.
Drizzle	High 75°F24°C	Low 60°F16°C	Precip 0.04 in0.9 mm12%	Cloud 31%	Wind NW 8 mph13 km/h	Monday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the NW at 9 mph14 km/h. Monday Night: Partly cloudy, with a low around 60°F16°C. Breezy from the NW at 8 mph12 km/h. 12% chance of drizzle overnight.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 8	77°F25°C	64°F18°C	0 in0.1 mm· 4%	72%	Partly Cloudy	N 4 mph7 km/h
DayMostly cloudy and warm, with a high of 77°F25°C. Light wind from the NNW around 5 mph8 km/h. NightOvercast, with a low around 64°F18°C. Light wind from the SSE around 3 mph5 km/h.
	WednesdaySep 9	77°F25°C	60°F16°C	0.06 in1.6 mm· 67%	96%	Light Rain	SSW 8 mph12 km/h
DayOvercast and warm, with a high of 77°F25°C and morning low of 63°F17°C. Breezy from the S at 7 to 11 mph11 to 18 km/h. NightOvercast, with a low around 60°F16°C. Breezy from the SSW at 8 to 14 mph13 to 23 km/h. 67% chance of light rain in the evening.
	ThursdaySep 10	85°F29°C	71°F22°C	0.2 in5.1 mm· 91%	68%	Showers	WSW 12 mph19 km/h
DayMostly cloudy and warm, with a high of 85°F29°C and morning low of 71°F22°C. Breezy from the W at 11 to 13 mph18 to 21 km/h. 71% chance of showers in the morning. NightOvercast, with a low around 72°F22°C. Windy from the WSW at 13 to 16 mph20 to 25 km/h. 91% chance of light rain overnight.
	FridaySep 11	76°F24°C	60°F16°C	0 in0 mm· —	15%	Clear	NW 7 mph11 km/h
DayMostly clear and warm, with a high of 76°F24°C and morning low of 65°F18°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. Dry air. NightMostly clear, with a low around 60°F16°C. Breezy from the NW at 6 to 8 mph10 to 13 km/h.
	SaturdaySep 12	76°F24°C	54°F12°C	0.01 in0.3 mm· 17%	65%	Drizzle	S 6 mph9 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 59°F15°C. Breezy from the SSE at 5 to 8 mph8 to 13 km/h. NightMostly cloudy, with a low around 54°F12°C. Breezy from the SSW at 6 to 9 mph10 to 14 km/h. 17% chance of drizzle overnight.
	SundaySep 13	76°F24°C	66°F19°C	0.54 in13.6 mm· 67%	78%	Rain	SSW 7 mph12 km/h
DayOvercast and warm, with a high of 76°F24°C and morning low of 67°F19°C. Breezy from the SSW at 7 mph11 km/h. 67% chance of rain throughout the day. Humid. NightMostly cloudy, with a low around 66°F19°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 60% chance of showers throughout the night.
	MondaySep 14	75°F24°C	60°F16°C	0.04 in0.9 mm· 12%	31%	Drizzle	NW 8 mph13 km/h
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the NW at 9 mph14 km/h. NightPartly cloudy, with a low around 60°F16°C. Breezy from the NW at 8 mph12 km/h. 12% chance of drizzle overnight.
	TuesdaySep 15	72°F22°C	55°F13°C	0 in0.1 mm· 3%	40%	Clear	S 7 mph11 km/h
DayPartly cloudy and warm, with a high of 72°F22°C and morning low of 58°F14°C. Breezy from the S at 6 to 9 mph10 to 14 km/h. NightPartly cloudy, with a low around 55°F13°C. Breezy from the SW at 7 to 9 mph12 to 15 km/h.
	WednesdaySep 16	79°F26°C	63°F17°C	0.07 in1.8 mm· 13%	52%	Drizzle	SW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 65°F19°C. Breezy from the SW at 8 mph12 km/h. 13% chance of drizzle throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 12% chance of drizzle throughout the night.
	ThursdaySep 17	75°F24°C	64°F18°C	0.06 in1.6 mm· 14%	59%	Drizzle	SE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the E at 6 to 7 mph10 to 11 km/h. 12% chance of drizzle throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the SW at 7 mph11 km/h. 14% chance of drizzle throughout the night.
	FridaySep 18	77°F25°C	64°F18°C	0.1 in2.5 mm· 17%	58%	Drizzle	SW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 66°F19°C. Breezy from the SW at 8 mph12 km/h. 17% chance of drizzle throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the SW at 7 to 8 mph12 to 14 km/h. 16% chance of drizzle throughout the night.
	SaturdaySep 19	75°F24°C	62°F17°C	0.12 in3 mm· 23%	51%	Showers	W 8 mph13 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 64°F18°C. Breezy from the W at 8 mph13 km/h. 20% chance of drizzle throughout the day. NightMostly cloudy, with a low around 62°F17°C. Breezy from the W at 8 mph13 km/h. 23% chance of showers throughout the night.
	SundaySep 20	69°F21°C	58°F15°C	0.12 in3 mm· 20%	56%	Drizzle	WNW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 69°F21°C and morning low of 60°F15°C. Breezy from the WNW at 8 mph12 km/h. 20% chance of drizzle throughout the day. NightMostly cloudy, with a low around 58°F15°C. Breezy from the WNW at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the night.
	MondaySep 21	67°F20°C	56°F13°C	0.12 in3 mm· 17%	56%	Drizzle	NW 7 mph12 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 57°F14°C. Breezy from the NW at 8 mph12 km/h. 16% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 56°F13°C. Breezy from the WNW at 7 mph12 km/h. 17% chance of drizzle throughout the night.
	TuesdaySep 22	68°F20°C	54°F12°C	0.12 in3 mm· 16%	52%	Drizzle	NW 7 mph11 km/h
DayMostly cloudy and mild, with a high of 68°F20°C and morning low of 56°F13°C. Breezy from the NNW at 7 mph11 km/h. 16% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the WNW at 7 mph11 km/h. 14% chance of drizzle throughout the night.

Nearby Cities

Watertown2 mi3 km Arlington2 mi3 km Waltham3 mi5 km Brighton3 mi5 km Allston4 mi6 km Cambridge4 mi6 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: 42.3959°N, 71.1787°W·Elevation: 21m·Timezone: America/New_York·Population: 24,729