Current Conditions

Le Vieux-Longueuil, Quebec

64°F18°C

Rain

Wind

ENE 5 mph8 km/h

Humidity

72%

Cloud Cover

27%

As of Tuesday, September 1, 2026 at 10:07 PM EDT

Today's Outlook

Night

Mostly cloudy, with a low around 62°F16°C. Breezy from the SSE at 9 to 12 mph14 to 20 km/h. 100% chance of rain in the evening.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Rain	High 74°F23°C	Low 62°F16°C	Precip 0.49 in12.4 mm100%	Cloud 84%	Wind SSE 10 mph16 km/h	Wednesday: Overcast and warm, with a high of 74°F23°C and morning low of 65°F18°C. Breezy from the SSE at 11 to 13 mph18 to 21 km/h. 41% chance of drizzle in the afternoon. Wednesday Night: Mostly cloudy, with a low around 62°F16°C. Breezy from the SSE at 9 to 12 mph14 to 20 km/h. 100% chance of rain in the evening.
Heavy Rain	High 76°F25°C	Low 65°F18°C	Precip 0.7 in17.9 mm100%	Cloud 69%	Wind SW 7 mph12 km/h	Thursday: Mostly cloudy and warm, with a high of 76°F25°C and morning low of 66°F19°C. Breezy from the WSW at 7 mph11 km/h. 70% chance of showers throughout the day. Humid. Thursday Night: Mostly cloudy, with a low around 65°F18°C. Breezy from the S at 8 to 11 mph12 to 18 km/h. 100% chance of heavy rain throughout the night.
Drizzle	High 75°F24°C	Low 64°F18°C	Precip 0.03 in0.8 mm29%	Cloud 43%	Wind NW 7 mph11 km/h	Friday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 65°F19°C. Breezy from the NW at 8 to 9 mph12 to 15 km/h. 29% chance of drizzle in the afternoon. Friday Night: Partly cloudy, with a low around 64°F18°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. 11% chance of drizzle.
Drizzle	High 71°F21°C	Low 59°F15°C	Precip 0.02 in0.6 mm16%	Cloud 52%	Wind NNE 9 mph15 km/h	Saturday: Mostly cloudy and warm, with a high of 71°F21°C and morning low of 63°F17°C. Breezy from the NNE at 11 to 12 mph17 to 19 km/h. 16% chance of drizzle throughout the day. Saturday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the NNE at 7 to 8 mph12 to 13 km/h.
Clear	High 75°F24°C	Low 53°F12°C	Precip 0 in0 mm—	Cloud 29%	Wind N 6 mph10 km/h	Sunday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 57°F14°C. Breezy from the NNE at 7 to 8 mph11 to 13 km/h. Sunday Night: Mostly clear, with a low around 53°F12°C. Breezy from the N at 6 to 7 mph9 to 11 km/h.
Drizzle	High 76°F24°C	Low 53°F12°C	Precip 0.04 in1.1 mm21%	Cloud 41%	Wind W 6 mph10 km/h	Monday: Partly cloudy and warm, with a high of 76°F24°C and morning low of 57°F14°C. Breezy from the W at 7 to 8 mph10 to 13 km/h. 18% chance of drizzle in the afternoon. Monday Night: Partly cloudy, with a low around 53°F12°C. Breezy from the WNW at 6 to 7 mph10 to 12 km/h. 21% chance of drizzle in the evening.
Drizzle	High 71°F21°C	Low 54°F12°C	Precip 0.05 in1.2 mm12%	Cloud 54%	Wind NW 6 mph10 km/h	Tuesday: Mostly cloudy and warm, with a high of 71°F21°C and morning low of 56°F13°C. Breezy from the NW at 7 mph11 km/h. Dry air. Tuesday Night: Mostly cloudy, with a low around 54°F12°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. 12% chance of drizzle throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	74°F23°C	62°F16°C	0.49 in12.4 mm· 100%	84%	Rain	SSE 10 mph16 km/h
DayOvercast and warm, with a high of 74°F23°C and morning low of 65°F18°C. Breezy from the SSE at 11 to 13 mph18 to 21 km/h. 41% chance of drizzle in the afternoon. NightMostly cloudy, with a low around 62°F16°C. Breezy from the SSE at 9 to 12 mph14 to 20 km/h. 100% chance of rain in the evening.
	ThursdaySep 3	76°F25°C	65°F18°C	0.7 in17.9 mm· 100%	69%	Heavy Rain	SW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 66°F19°C. Breezy from the WSW at 7 mph11 km/h. 70% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 65°F18°C. Breezy from the S at 8 to 11 mph12 to 18 km/h. 100% chance of heavy rain throughout the night.
	FridaySep 4	75°F24°C	64°F18°C	0.03 in0.8 mm· 29%	43%	Drizzle	NW 7 mph11 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 8 to 9 mph12 to 15 km/h. 29% chance of drizzle in the afternoon. NightPartly cloudy, with a low around 64°F18°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. 11% chance of drizzle.
	SaturdaySep 5	71°F21°C	59°F15°C	0.02 in0.6 mm· 16%	52%	Drizzle	NNE 9 mph15 km/h
DayMostly cloudy and warm, with a high of 71°F21°C and morning low of 63°F17°C. Breezy from the NNE at 11 to 12 mph17 to 19 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 59°F15°C. Breezy from the NNE at 7 to 8 mph12 to 13 km/h.
	SundaySep 6	75°F24°C	53°F12°C	0 in0 mm· —	29%	Clear	N 6 mph10 km/h
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 57°F14°C. Breezy from the NNE at 7 to 8 mph11 to 13 km/h. NightMostly clear, with a low around 53°F12°C. Breezy from the N at 6 to 7 mph9 to 11 km/h.
	MondaySep 7	76°F24°C	53°F12°C	0.04 in1.1 mm· 21%	41%	Drizzle	W 6 mph10 km/h
DayPartly cloudy and warm, with a high of 76°F24°C and morning low of 57°F14°C. Breezy from the W at 7 to 8 mph10 to 13 km/h. 18% chance of drizzle in the afternoon. NightPartly cloudy, with a low around 53°F12°C. Breezy from the WNW at 6 to 7 mph10 to 12 km/h. 21% chance of drizzle in the evening.
	TuesdaySep 8	71°F21°C	54°F12°C	0.05 in1.2 mm· 12%	54%	Drizzle	NW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 71°F21°C and morning low of 56°F13°C. Breezy from the NW at 7 mph11 km/h. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. 12% chance of drizzle throughout the night.
	WednesdaySep 9	72°F22°C	54°F12°C	0.12 in3 mm· 25%	73%	Light Rain	SSW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 57°F14°C. Breezy from the SSW at 7 to 8 mph11 to 12 km/h. 20% chance of drizzle throughout the day. NightMostly cloudy, with a low around 54°F12°C. Breezy from the SSW at 7 to 8 mph11 to 13 km/h. 25% chance of light rain throughout the night.
	ThursdaySep 10	74°F23°C	63°F17°C	0.28 in7.1 mm· 35%	71%	Light Rain	WSW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 64°F18°C. Breezy from the WSW at 10 to 11 mph16 to 18 km/h. 35% chance of light rain throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the WSW at 8 mph13 km/h. 30% chance of showers throughout the night.
	FridaySep 11	71°F22°C	61°F16°C	0.11 in2.9 mm· 21%	62%	Showers	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 W at 9 mph14 km/h. 21% chance of drizzle throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the W at 7 to 8 mph12 to 13 km/h. 21% chance of showers throughout the night.
	SaturdaySep 12	70°F21°C	57°F14°C	0.15 in3.7 mm· 23%	61%	Showers	W 8 mph13 km/h
DayMostly cloudy and warm, with a high of 70°F21°C and morning low of 58°F15°C. Breezy from the W at 9 to 10 mph14 to 16 km/h. 23% chance of showers throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the W at 7 to 8 mph12 to 12 km/h. 18% chance of showers throughout the night.
	SundaySep 13	69°F20°C	55°F13°C	0.13 in3.2 mm· 19%	54%	Showers	W 8 mph13 km/h
DayMostly cloudy and warm, with a high of 69°F20°C and morning low of 57°F14°C. Breezy from the W at 8 to 9 mph14 to 15 km/h. 19% chance of showers throughout the day. NightMostly cloudy, with a low around 55°F13°C. Breezy from the W at 7 mph11 km/h. 16% chance of showers throughout the night.
	MondaySep 14	69°F21°C	54°F12°C	0.13 in3.2 mm· 19%	60%	Showers	WSW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 69°F21°C and morning low of 56°F13°C. Breezy from the WSW at 8 mph12 km/h. 19% chance of drizzle throughout the day. NightMostly cloudy, with a low around 54°F12°C. Breezy from the SW at 7 mph11 km/h. 16% chance of showers throughout the night.
	TuesdaySep 15	69°F21°C	56°F13°C	0.13 in3.3 mm· 24%	62%	Showers	SW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 69°F21°C and morning low of 57°F14°C. Breezy from the WSW at 8 mph13 km/h. 18% chance of drizzle throughout the day. NightMostly cloudy, with a low around 56°F13°C. Breezy from the SW at 7 mph11 km/h. 24% chance of showers throughout the night.
	WednesdaySep 16	69°F21°C	55°F13°C	0.11 in2.8 mm· 25%	59%	Showers	SW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 69°F21°C and morning low of 57°F14°C. Breezy from the WSW at 8 to 9 mph14 to 15 km/h. 25% chance of drizzle throughout the day. NightMostly cloudy, with a low around 55°F13°C. Breezy from the SW at 7 mph11 km/h. 21% chance of showers throughout the night.

Nearby Cities

Longueuil2 mi4 km Mercier–Hochelaga-Maisonneuve3 mi5 km Laflèche3 mi5 km Le Plateau-Mont-Royal4 mi6 km Ville-Marie4 mi6 km Greenfield Park4 mi7 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: 45.5372°N, 73.5077°W·Elevation: 15m·Timezone: America/Toronto·Population: 135,218