Current Conditions

Chelmsford, Massachusetts

82°F28°C

Drizzle

Wind

NW 7 mph11 km/h

Humidity

48%

Cloud Cover

38%

As of Thursday, August 13, 2026 at 3:20 PM EDT

Today's Outlook

Day

Partly cloudy and warm, with a high of 82°F28°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. 16% chance of drizzle throughout the day.

Night

Partly cloudy, with a low around 70°F21°C. Light wind from the WNW around 6 mph10 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Drizzle	High 82°F28°C	Low 70°F21°C	Precip 0.01 in0.3 mm16%	Cloud 32%	Wind WNW 7 mph11 km/h	Thursday: Partly cloudy and warm, with a high of 82°F28°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. 16% chance of drizzle throughout the day. Thursday Night: Partly cloudy, with a low around 70°F21°C. Light wind from the WNW around 6 mph10 km/h.
Clear	High 82°F28°C	Low 63°F17°C	Precip 0.01 in0.2 mm9%	Cloud 16%	Wind NW 7 mph11 km/h	Friday: Mostly clear and warm, with a high of 82°F28°C and morning low of 69°F21°C. Breezy from the NW at 8 to 9 mph12 to 15 km/h. Friday Night: Mostly clear, with a low around 63°F17°C. Light wind from the NW around 6 mph9 km/h.
Clear	High 81°F27°C	Low 59°F15°C	Precip 0 in0 mm—	Cloud 29%	Wind NNW 5 mph8 km/h	Saturday: Partly cloudy and warm, with a high of 81°F27°C and morning low of 66°F19°C. Breezy from the NNW at 6 to 7 mph9 to 11 km/h. Dry air. Saturday Night: Mostly clear, with a low around 59°F15°C. Light wind from the NNW around 4 mph7 km/h.
Showers	High 81°F27°C	Low 57°F14°C	Precip 0.08 in2.1 mm48%	Cloud 68%	Wind SSW 5 mph9 km/h	Sunday: Mostly cloudy and warm, with a high of 81°F27°C and morning low of 64°F18°C. Breezy from the S at 5 to 7 mph7 to 12 km/h. 18% chance of drizzle in the afternoon. Sunday Night: Mostly cloudy, with a low around 57°F14°C. Breezy from the SSW at 6 to 9 mph10 to 14 km/h. 48% chance of showers in the evening.
Rain	High 77°F25°C	Low 68°F20°C	Precip 0.49 in12.4 mm82%	Cloud 83%	Wind S 7 mph11 km/h	Monday: Overcast and warm, with a high of 77°F25°C and morning low of 69°F21°C. Breezy from the SSE at 7 mph11 km/h. 77% chance of rain throughout the day. Humid. Monday Night: Mostly cloudy, with a low around 68°F20°C. Breezy from the S at 7 to 9 mph11 to 14 km/h. 82% chance of rain throughout the night.
Drizzle	High 81°F27°C	Low 66°F19°C	Precip 0.03 in0.7 mm14%	Cloud 49%	Wind NNW 5 mph8 km/h	Tuesday: Mostly cloudy and warm, with a high of 81°F27°C and morning low of 69°F20°C. Light wind from the N around 5 mph8 km/h. 14% chance of drizzle in the afternoon. Tuesday Night: Partly cloudy, with a low around 66°F19°C. Light wind from the NNW around 5 mph8 km/h.
Partly Cloudy	High 84°F29°C	Low 62°F17°C	Precip 0.01 in0.3 mm9%	Cloud 50%	Wind SW 5 mph8 km/h	Wednesday: Mostly cloudy and warm, with a high of 84°F29°C and morning low of 68°F20°C. Light wind from the SW around 4 mph7 km/h. Wednesday Night: Partly cloudy, with a low around 62°F17°C. Light wind from the SW around 5 mph8 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	82°F28°C	70°F21°C	0.01 in0.3 mm· 16%	32%	Drizzle	WNW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 82°F28°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 70°F21°C. Light wind from the WNW around 6 mph10 km/h.
	FridayAug 14	82°F28°C	63°F17°C	0.01 in0.2 mm· 9%	16%	Clear	NW 7 mph11 km/h
DayMostly clear and warm, with a high of 82°F28°C and morning low of 69°F21°C. Breezy from the NW at 8 to 9 mph12 to 15 km/h. NightMostly clear, with a low around 63°F17°C. Light wind from the NW around 6 mph9 km/h.
	SaturdayAug 15	81°F27°C	59°F15°C	0 in0 mm· —	29%	Clear	NNW 5 mph8 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 66°F19°C. Breezy from the NNW at 6 to 7 mph9 to 11 km/h. Dry air. NightMostly clear, with a low around 59°F15°C. Light wind from the NNW around 4 mph7 km/h.
	SundayAug 16	81°F27°C	57°F14°C	0.08 in2.1 mm· 48%	68%	Showers	SSW 5 mph9 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 64°F18°C. Breezy from the S at 5 to 7 mph7 to 12 km/h. 18% chance of drizzle in the afternoon. NightMostly cloudy, with a low around 57°F14°C. Breezy from the SSW at 6 to 9 mph10 to 14 km/h. 48% chance of showers in the evening.
	MondayAug 17	77°F25°C	68°F20°C	0.49 in12.4 mm· 82%	83%	Rain	S 7 mph11 km/h
DayOvercast and warm, with a high of 77°F25°C and morning low of 69°F21°C. Breezy from the SSE at 7 mph11 km/h. 77% chance of rain throughout the day. Humid. NightMostly cloudy, with a low around 68°F20°C. Breezy from the S at 7 to 9 mph11 to 14 km/h. 82% chance of rain throughout the night.
	TuesdayAug 18	81°F27°C	66°F19°C	0.03 in0.7 mm· 14%	49%	Drizzle	NNW 5 mph8 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 69°F20°C. Light wind from the N around 5 mph8 km/h. 14% chance of drizzle in the afternoon. NightPartly cloudy, with a low around 66°F19°C. Light wind from the NNW around 5 mph8 km/h.
	WednesdayAug 19	84°F29°C	62°F17°C	0.01 in0.3 mm· 9%	50%	Partly Cloudy	SW 5 mph8 km/h
DayMostly cloudy and warm, with a high of 84°F29°C and morning low of 68°F20°C. Light wind from the SW around 4 mph7 km/h. NightPartly cloudy, with a low around 62°F17°C. Light wind from the SW around 5 mph8 km/h.
	ThursdayAug 20	83°F28°C	69°F20°C	0.14 in3.6 mm· 37%	65%	Showers	SW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 83°F28°C and morning low of 72°F22°C. Breezy from the SW at 8 to 9 mph12 to 14 km/h. 37% chance of showers throughout the day. NightMostly cloudy, with a low around 69°F20°C. Breezy from the SW at 7 mph11 km/h. 29% chance of showers throughout the night.
	FridayAug 21	79°F26°C	65°F18°C	0.13 in3.4 mm· 25%	49%	Showers	NW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 67°F19°C. Light wind from the NW around 6 mph10 km/h. 16% chance of showers throughout the day. NightPartly cloudy, with a low around 65°F18°C. Breezy from the WNW at 6 to 7 mph10 to 11 km/h. 25% chance of showers throughout the night.
	SaturdayAug 22	79°F26°C	61°F16°C	0.08 in2 mm· 17%	48%	Drizzle	W 5 mph8 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 65°F18°C. Light wind from the W around 5 mph8 km/h. 17% chance of drizzle throughout the day. NightPartly cloudy, with a low around 61°F16°C. Light wind from the W around 5 mph8 km/h. 14% chance of drizzle throughout the night.
	SundayAug 23	80°F27°C	61°F16°C	0.11 in2.8 mm· 18%	49%	Drizzle	W 5 mph8 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 66°F19°C. Light wind from the W around 5 mph8 km/h. 18% chance of drizzle throughout the day. NightPartly cloudy, with a low around 61°F16°C. Light wind from the WSW around 5 mph8 km/h. 12% chance of drizzle throughout the night.
	MondayAug 24	81°F27°C	62°F16°C	0.08 in2 mm· 15%	43%	Drizzle	W 6 mph9 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 66°F19°C. Light wind from the W around 6 mph9 km/h. 15% chance of drizzle throughout the day. NightPartly cloudy, with a low around 62°F16°C. Light wind from the WSW around 6 mph9 km/h. 10% chance of drizzle throughout the night.
	TuesdayAug 25	83°F28°C	63°F17°C	0.07 in1.9 mm· 16%	42%	Drizzle	WSW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 83°F28°C and morning low of 68°F20°C. Breezy from the W at 6 to 7 mph10 to 11 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 63°F17°C. Light wind from the WSW around 6 mph10 km/h. 12% chance of drizzle throughout the night.
	WednesdayAug 26	82°F28°C	64°F18°C	0.07 in1.7 mm· 19%	44%	Drizzle	W 7 mph11 km/h
DayPartly cloudy and warm, with a high of 82°F28°C and morning low of 68°F20°C. Breezy from the W at 7 to 8 mph11 to 12 km/h. 19% chance of drizzle throughout the day. NightPartly cloudy, with a low around 64°F18°C. Light wind from the W around 6 mph10 km/h. 18% chance of drizzle in the evening.
	ThursdayAug 27	81°F27°C	63°F17°C	0.08 in2.1 mm· 18%	46%	Drizzle	W 6 mph10 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 67°F19°C. Breezy from the WNW at 6 to 7 mph10 to 11 km/h. 18% chance of drizzle throughout the day. NightPartly cloudy, with a low around 63°F17°C. Light wind from the W around 6 mph9 km/h. 12% chance of drizzle throughout the night.

Nearby Cities

Lowell3 mi6 km Westford4 mi6 km Billerica6 mi9 km Dracut6 mi9 km Tewksbury7 mi11 km Acton9 mi14 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: 42.5998°N, 71.3673°W·Elevation: 75m·Timezone: America/New_York·Population: 33,925