Current Conditions

Chestnut Hill, Massachusetts

64°F18°C

Drizzle

Wind

S 3 mph5 km/h

Humidity

86%

Cloud Cover

96%

As of Wednesday, September 9, 2026 at 12:19 AM EDT

Today's Outlook

Day

Overcast and warm, with a high of 77°F25°C and morning low of 64°F18°C. Breezy from the S at 7 to 11 mph12 to 19 km/h.

Night

Overcast, with a low around 61°F16°C. Breezy from the SSW at 8 to 15 mph13 to 23 km/h. 44% chance of drizzle in the evening.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Drizzle	High 77°F25°C	Low 61°F16°C	Precip 0.03 in0.8 mm44%	Cloud 97%	Wind SSW 8 mph12 km/h	Wednesday: Overcast and warm, with a high of 77°F25°C and morning low of 64°F18°C. Breezy from the S at 7 to 11 mph12 to 19 km/h. Wednesday Night: Overcast, with a low around 61°F16°C. Breezy from the SSW at 8 to 15 mph13 to 23 km/h. 44% chance of drizzle in the evening.
Light Rain	High 85°F29°C	Low 71°F22°C	Precip 0.2 in5 mm90%	Cloud 70%	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 WSW at 11 to 13 mph18 to 20 km/h. 83% 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 26 km/h. 90% chance of light rain overnight.
Clear	High 75°F24°C	Low 60°F16°C	Precip 0 in0 mm—	Cloud 17%	Wind NW 7 mph11 km/h	Friday: Mostly clear and warm, with a high of 75°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: Partly cloudy, with a low around 60°F16°C. Breezy from the NW at 6 to 8 mph10 to 13 km/h.
Drizzle	High 75°F24°C	Low 54°F12°C	Precip 0.01 in0.2 mm11%	Cloud 62%	Wind S 6 mph9 km/h	Saturday: Mostly cloudy and warm, with a high of 75°F24°C and morning low of 58°F15°C. Breezy from the SSE at 5 to 8 mph8 to 12 km/h. Saturday Night: Mostly cloudy, with a low around 54°F12°C. Breezy from the SSW at 6 to 8 mph10 to 13 km/h. 11% chance of drizzle overnight.
Rain	High 74°F23°C	Low 65°F18°C	Precip 0.42 in10.6 mm68%	Cloud 81%	Wind SSW 7 mph11 km/h	Sunday: Overcast and warm, with a high of 74°F23°C and morning low of 66°F19°C. Breezy from the S at 7 to 8 mph11 to 12 km/h. 68% chance of rain throughout the day. Humid. Sunday Night: Mostly cloudy, with a low around 65°F18°C. Breezy from the SSW at 7 to 8 mph11 to 12 km/h. 45% chance of light rain throughout the night.
Drizzle	High 75°F24°C	Low 61°F16°C	Precip 0.04 in1 mm12%	Cloud 33%	Wind NW 8 mph13 km/h	Monday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 65°F19°C. Breezy from the NW at 9 mph14 km/h. Monday Night: Partly cloudy, with a low around 61°F16°C. Breezy from the NW at 8 mph12 km/h. 12% chance of drizzle overnight.
Partly Cloudy	High 73°F23°C	Low 55°F13°C	Precip 0 in0.1 mm2%	Cloud 41%	Wind SSW 7 mph12 km/h	Tuesday: Partly cloudy and warm, with a high of 73°F23°C and morning low of 59°F15°C. Breezy from the S at 7 to 9 mph11 to 14 km/h. Tuesday Night: Partly cloudy, with a low around 55°F13°C. Breezy from the SW at 8 to 10 mph13 to 16 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 9	77°F25°C	61°F16°C	0.03 in0.8 mm· 44%	97%	Drizzle	SSW 8 mph12 km/h
DayOvercast and warm, with a high of 77°F25°C and morning low of 64°F18°C. Breezy from the S at 7 to 11 mph12 to 19 km/h. NightOvercast, with a low around 61°F16°C. Breezy from the SSW at 8 to 15 mph13 to 23 km/h. 44% chance of drizzle in the evening.
	ThursdaySep 10	85°F29°C	71°F22°C	0.2 in5 mm· 90%	70%	Light Rain	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 WSW at 11 to 13 mph18 to 20 km/h. 83% chance of showers in the morning. NightOvercast, with a low around 72°F22°C. Windy from the WSW at 13 to 16 mph20 to 26 km/h. 90% chance of light rain overnight.
	FridaySep 11	75°F24°C	60°F16°C	0 in0 mm· —	17%	Clear	NW 7 mph11 km/h
DayMostly clear and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. Dry air. NightPartly cloudy, with a low around 60°F16°C. Breezy from the NW at 6 to 8 mph10 to 13 km/h.
	SaturdaySep 12	75°F24°C	54°F12°C	0.01 in0.2 mm· 11%	62%	Drizzle	S 6 mph9 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 58°F15°C. Breezy from the SSE at 5 to 8 mph8 to 12 km/h. NightMostly cloudy, with a low around 54°F12°C. Breezy from the SSW at 6 to 8 mph10 to 13 km/h. 11% chance of drizzle overnight.
	SundaySep 13	74°F23°C	65°F18°C	0.42 in10.6 mm· 68%	81%	Rain	SSW 7 mph11 km/h
DayOvercast and warm, with a high of 74°F23°C and morning low of 66°F19°C. Breezy from the S at 7 to 8 mph11 to 12 km/h. 68% chance of rain throughout the day. Humid. NightMostly cloudy, with a low around 65°F18°C. Breezy from the SSW at 7 to 8 mph11 to 12 km/h. 45% chance of light rain throughout the night.
	MondaySep 14	75°F24°C	61°F16°C	0.04 in1 mm· 12%	33%	Drizzle	NW 8 mph13 km/h
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 65°F19°C. Breezy from the NW at 9 mph14 km/h. NightPartly cloudy, with a low around 61°F16°C. Breezy from the NW at 8 mph12 km/h. 12% chance of drizzle overnight.
	TuesdaySep 15	73°F23°C	55°F13°C	0 in0.1 mm· 2%	41%	Partly Cloudy	SSW 7 mph12 km/h
DayPartly cloudy and warm, with a high of 73°F23°C and morning low of 59°F15°C. Breezy from the S at 7 to 9 mph11 to 14 km/h. NightPartly cloudy, with a low around 55°F13°C. Breezy from the SW at 8 to 10 mph13 to 16 km/h.
	WednesdaySep 16	80°F27°C	64°F18°C	0.04 in1.1 mm· 14%	53%	Drizzle	SW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 67°F19°C. Breezy from the SW at 8 mph12 km/h. 14% chance of drizzle throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the SW at 8 to 9 mph13 to 15 km/h. 10% chance of drizzle in the evening.
	ThursdaySep 17	76°F25°C	65°F18°C	0.12 in3 mm· 17%	58%	Showers	SSW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 66°F19°C. Breezy from the SE at 6 to 7 mph10 to 12 km/h. 17% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F18°C. Breezy from the SW at 7 to 8 mph11 to 13 km/h. 16% chance of showers throughout the night.
	FridaySep 18	76°F25°C	65°F18°C	0.14 in3.5 mm· 20%	55%	Showers	WSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 67°F19°C. Breezy from the WSW at 8 to 9 mph13 to 14 km/h. 20% chance of drizzle throughout the day. NightMostly cloudy, with a low around 65°F18°C. Breezy from the WSW at 8 to 9 mph13 to 14 km/h. 17% chance of showers throughout the night.
	SaturdaySep 19	71°F22°C	61°F16°C	0.1 in2.6 mm· 18%	52%	Drizzle	W 8 mph13 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 62°F17°C. Breezy from the WNW at 8 mph13 km/h. 18% chance of drizzle throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the W at 8 mph12 km/h. 17% chance of drizzle throughout the night.
	SundaySep 20	68°F20°C	57°F14°C	0.14 in3.5 mm· 20%	54%	Showers	NW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 58°F15°C. Breezy from the NW at 7 mph12 km/h. 20% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 57°F14°C. Breezy from the WNW at 7 mph12 km/h. 19% chance of showers throughout the night.
	MondaySep 21	66°F19°C	54°F12°C	0.14 in3.6 mm· 19%	57%	Showers	NNW 7 mph11 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 55°F13°C. Breezy from the N at 7 to 8 mph12 to 12 km/h. 19% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the NW at 7 mph11 km/h. 19% chance of showers throughout the night.
	TuesdaySep 22	67°F20°C	54°F12°C	0.15 in3.9 mm· 17%	55%	Showers	NNW 8 mph12 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 56°F14°C. Breezy from the N at 8 mph13 km/h. 17% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the NW at 7 to 8 mph12 to 12 km/h. 17% chance of showers throughout the night.
	WednesdaySep 23	66°F19°C	54°F12°C	0.15 in3.7 mm· 18%	54%	Showers	N 7 mph12 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 56°F13°C. Breezy from the N at 7 to 8 mph12 to 12 km/h. 18% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the NNW at 7 mph12 km/h. 16% chance of showers throughout the night.

Nearby Cities

Brighton1 mi2 km Newton2 mi4 km Brookline2 mi4 km Jamaica Plain3 mi4 km Allston3 mi5 km Watertown3 mi5 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: 42.3306°N, 71.1662°W·Elevation: 60m·Timezone: America/New_York·Population: 23,649