Current Conditions

Acton, Massachusetts

63°F17°C

Light Rain

Wind

NNW 3 mph5 km/h

Humidity

84%

Cloud Cover

96%

As of Tuesday, September 8, 2026 at 10:57 PM EDT

Today's Outlook

Night

Overcast, with a low around 59°F15°C. Breezy from the SSW at 7 to 12 mph12 to 20 km/h. 61% chance of light rain in the evening.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Light Rain	High 78°F26°C	Low 59°F15°C	Precip 0.06 in1.4 mm61%	Cloud 97%	Wind SSW 7 mph11 km/h	Wednesday: Overcast and warm, with a high of 78°F26°C and morning low of 62°F17°C. Breezy from the S at 6 to 10 mph10 to 16 km/h. 11% chance of drizzle in the afternoon. Wednesday Night: Overcast, with a low around 59°F15°C. Breezy from the SSW at 7 to 12 mph12 to 20 km/h. 61% chance of light rain in the evening.
Rain	High 86°F30°C	Low 71°F22°C	Precip 0.2 in5.2 mm96%	Cloud 68%	Wind WSW 11 mph18 km/h	Thursday: Mostly cloudy and hot, with a high of 86°F30°C and morning low of 72°F22°C. Breezy from the W at 11 to 13 mph18 to 21 km/h. 59% chance of showers in the morning. Thursday Night: Overcast, with a low around 71°F22°C. Breezy from the WSW at 11 to 14 mph18 to 23 km/h. 96% chance of rain overnight.
Clear	High 75°F24°C	Low 58°F15°C	Precip 0 in0 mm—	Cloud 15%	Wind NW 7 mph10 km/h	Friday: Mostly clear and warm, with a high of 75°F24°C and morning low of 63°F17°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. Dry air. Friday Night: Partly cloudy, with a low around 58°F15°C. Breezy from the NW at 6 to 7 mph9 to 11 km/h.
Drizzle	High 76°F25°C	Low 51°F11°C	Precip 0.02 in0.5 mm21%	Cloud 62%	Wind S 5 mph8 km/h	Saturday: Mostly cloudy and warm, with a high of 76°F25°C and morning low of 56°F14°C. Light wind from the S around 4 mph7 km/h. Dry air. Saturday Night: Mostly cloudy, with a low around 51°F11°C. Breezy from the SSW at 5 to 7 mph9 to 12 km/h. 21% chance of drizzle in the evening.
Rain	High 76°F24°C	Low 64°F18°C	Precip 0.4 in10.2 mm68%	Cloud 80%	Wind SSW 6 mph10 km/h	Sunday: Overcast and warm, with a high of 76°F24°C and morning low of 65°F18°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. 68% chance of rain throughout the day. Humid. Sunday Night: Mostly cloudy, with a low around 64°F18°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. 61% chance of light rain throughout the night.
Drizzle	High 75°F24°C	Low 59°F15°C	Precip 0.03 in0.7 mm12%	Cloud 35%	Wind NW 7 mph12 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 8 to 9 mph13 to 14 km/h. Monday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the NW at 7 to 8 mph11 to 12 km/h. 12% chance of drizzle before dawn.
Partly Cloudy	High 74°F23°C	Low 53°F12°C	Precip 0.01 in0.2 mm4%	Cloud 42%	Wind SSW 7 mph11 km/h	Tuesday: Partly cloudy and warm, with a high of 74°F23°C and morning low of 57°F14°C. Breezy from the SSW at 6 to 8 mph10 to 13 km/h. Tuesday Night: Partly cloudy, with a low around 53°F12°C. Breezy from the SW at 7 to 9 mph11 to 15 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 9	78°F26°C	59°F15°C	0.06 in1.4 mm· 61%	97%	Light Rain	SSW 7 mph11 km/h
DayOvercast and warm, with a high of 78°F26°C and morning low of 62°F17°C. Breezy from the S at 6 to 10 mph10 to 16 km/h. 11% chance of drizzle in the afternoon. NightOvercast, with a low around 59°F15°C. Breezy from the SSW at 7 to 12 mph12 to 20 km/h. 61% chance of light rain in the evening.
	ThursdaySep 10	86°F30°C	71°F22°C	0.2 in5.2 mm· 96%	68%	Rain	WSW 11 mph18 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 72°F22°C. Breezy from the W at 11 to 13 mph18 to 21 km/h. 59% chance of showers in the morning. NightOvercast, with a low around 71°F22°C. Breezy from the WSW at 11 to 14 mph18 to 23 km/h. 96% chance of rain overnight.
	FridaySep 11	75°F24°C	58°F15°C	0 in0 mm· —	15%	Clear	NW 7 mph10 km/h
DayMostly clear and warm, with a high of 75°F24°C and morning low of 63°F17°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. Dry air. NightPartly cloudy, with a low around 58°F15°C. Breezy from the NW at 6 to 7 mph9 to 11 km/h.
	SaturdaySep 12	76°F25°C	51°F11°C	0.02 in0.5 mm· 21%	62%	Drizzle	S 5 mph8 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 56°F14°C. Light wind from the S around 4 mph7 km/h. Dry air. NightMostly cloudy, with a low around 51°F11°C. Breezy from the SSW at 5 to 7 mph9 to 12 km/h. 21% chance of drizzle in the evening.
	SundaySep 13	76°F24°C	64°F18°C	0.4 in10.2 mm· 68%	80%	Rain	SSW 6 mph10 km/h
DayOvercast and warm, with a high of 76°F24°C and morning low of 65°F18°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. 68% chance of rain throughout the day. Humid. NightMostly cloudy, with a low around 64°F18°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. 61% chance of light rain throughout the night.
	MondaySep 14	75°F24°C	59°F15°C	0.03 in0.7 mm· 12%	35%	Drizzle	NW 7 mph12 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 8 to 9 mph13 to 14 km/h. NightPartly cloudy, with a low around 59°F15°C. Breezy from the NW at 7 to 8 mph11 to 12 km/h. 12% chance of drizzle before dawn.
	TuesdaySep 15	74°F23°C	53°F12°C	0.01 in0.2 mm· 4%	42%	Partly Cloudy	SSW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 74°F23°C and morning low of 57°F14°C. Breezy from the SSW at 6 to 8 mph10 to 13 km/h. NightPartly cloudy, with a low around 53°F12°C. Breezy from the SW at 7 to 9 mph11 to 15 km/h.
	WednesdaySep 16	81°F27°C	64°F18°C	0.05 in1.2 mm· 14%	55%	Drizzle	WSW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 67°F19°C. Breezy from the WSW at 7 to 8 mph12 to 12 km/h. 14% chance of drizzle throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the SW at 7 to 9 mph12 to 14 km/h.
	ThursdaySep 17	76°F24°C	63°F17°C	0.09 in2.3 mm· 18%	62%	Drizzle	SW 6 mph9 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 65°F18°C. Light wind from the SE around 5 mph9 km/h. 18% chance of drizzle throughout the day. NightMostly cloudy, with a low around 63°F17°C. Light wind from the WSW around 6 mph10 km/h. 15% chance of drizzle throughout the night.
	FridaySep 18	77°F25°C	64°F18°C	0.15 in3.9 mm· 20%	57%	Showers	WSW 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 WSW at 8 to 9 mph13 to 14 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the WSW at 7 to 8 mph12 to 12 km/h. 20% chance of showers throughout the night.
	SaturdaySep 19	71°F22°C	58°F14°C	0.14 in3.5 mm· 16%	51%	Showers	WNW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 61°F16°C. Breezy from the WNW at 7 to 8 mph12 to 12 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 58°F14°C. Breezy from the W at 7 mph11 km/h. 15% chance of showers throughout the night.
	SundaySep 20	68°F20°C	54°F12°C	0.11 in2.8 mm· 17%	53%	Showers	WNW 7 mph10 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 56°F13°C. Breezy from the WNW at 7 mph11 km/h. 17% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 54°F12°C. Breezy from the WNW at 6 to 7 mph10 to 11 km/h. 17% chance of showers throughout the night.
	MondaySep 21	66°F19°C	51°F11°C	0.16 in4 mm· 18%	53%	Showers	NNW 6 mph10 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 53°F12°C. Breezy from the NNW at 6 to 7 mph10 to 11 km/h. 18% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 51°F11°C. Light wind from the NW around 6 mph10 km/h. 17% chance of showers throughout the night.
	TuesdaySep 22	67°F20°C	50°F10°C	0.13 in3.2 mm· 14%	50%	Showers	NW 7 mph10 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 53°F12°C. Breezy from the NNW at 7 mph11 km/h. 14% chance of showers throughout the day. Dry air. NightPartly cloudy, with a low around 50°F10°C. Light wind from the WNW around 6 mph10 km/h. 13% chance of drizzle throughout the night.
	WednesdaySep 23	68°F20°C	51°F11°C	0.09 in2.4 mm· 15%	55%	Showers	NW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 53°F12°C. Breezy from the NW at 7 mph11 km/h. 15% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 51°F11°C. Light wind from the WNW around 6 mph10 km/h. 14% chance of drizzle throughout the night.

Nearby Cities

Concord5 mi7 km Westford7 mi10 km Sudbury7 mi11 km Chelmsford9 mi14 km Billerica10 mi16 km Lexington11 mi18 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: 42.4851°N, 71.4328°W·Elevation: 81m·Timezone: America/New_York·Population: 20,897