Current Conditions

Châteauguay, Quebec

45°F7°C

Clear

Feels like41°F5°C

Wind

NE 7 mph11 km/h

Humidity

88%

Cloud Cover

As of Wednesday, September 23, 2026 at 6:33 AM EDT

Today's Outlook

Day

Mostly clear and mild, with a high of 66°F19°C and morning low of 45°F7°C. Breezy from the NE at 7 to 8 mph12 to 12 km/h. Dry air.

Night

Mostly clear, with a low around 42°F6°C. Breezy from the NE at 6 to 7 mph10 to 11 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 66°F19°C	Low 42°F6°CFeels 38°F3°C	Precip 0 in0 mm—	Cloud 1%	Wind NE 7 mph11 km/h	Wednesday: Mostly clear and mild, with a high of 66°F19°C and morning low of 45°F7°C. Breezy from the NE at 7 to 8 mph12 to 12 km/h. Dry air. Wednesday Night: Mostly clear, with a low around 42°F6°C. Breezy from the NE at 6 to 7 mph10 to 11 km/h.
Clear	High 69°F20°C	Low 41°F5°CFeels 38°F3°C	Precip 0 in0 mm—	Cloud 1%	Wind NE 4 mph7 km/h	Thursday: Mostly clear and warm, with a high of 69°F20°C and morning low of 44°F7°C. Light wind from the NE around 4 mph7 km/h. Dry air. Thursday Night: Mostly clear, with a low around 41°F5°C. Light wind from the NNE around 4 mph7 km/h.
Clear	High 73°F23°C	Low 45°F7°CFeels 42°F6°C	Precip 0 in0 mm—	Cloud 29%	Wind NNE 6 mph10 km/h	Friday: Partly cloudy and warm, with a high of 73°F23°C and morning low of 47°F9°C. Breezy from the NE at 6 to 8 mph10 to 13 km/h. Dry air. Friday Night: Partly cloudy, with a low around 45°F7°C. Breezy from the NNE at 6 to 7 mph9 to 11 km/h.
Drizzle	High 70°F21°C	Low 51°F10°C	Precip 0.02 in0.4 mm11%	Cloud 72%	Wind NNE 9 mph14 km/h	Saturday: Mostly cloudy and warm, with a high of 70°F21°C and morning low of 52°F11°C. Breezy from the NE at 9 to 10 mph15 to 16 km/h. Dry air. Saturday Night: Mostly cloudy, with a low around 51°F10°C. Breezy from the NNE at 8 to 10 mph13 to 17 km/h. 11% chance of drizzle in the evening.
Light Rain	High 64°F18°C	Low 56°F13°C	Precip 0.24 in6.1 mm61%	Cloud 93%	Wind NE 12 mph20 km/h	Sunday: Overcast and mild, with a high of 64°F18°C and morning low of 56°F14°C. Breezy from the NE at 13 mph21 km/h. 61% chance of light rain throughout the day. Dry air. Sunday Night: Overcast, with a low around 56°F13°C. Breezy from the NE at 11 to 12 mph18 to 19 km/h. 57% chance of light rain throughout the night.
Light Rain	High 60°F15°C	Low 56°F13°C	Precip 0.14 in3.5 mm39%	Cloud 93%	Wind NE 8 mph13 km/h	Monday: Overcast and mild, with a high of 60°F15°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h. 38% chance of light rain throughout the day. Monday Night: Overcast, with a low around 56°F13°C. Breezy from the NE at 8 to 10 mph12 to 17 km/h. 39% chance of light rain throughout the night.
Drizzle	High 65°F18°C	Low 54°F12°C	Precip 0.02 in0.5 mm14%	Cloud 73%	Wind W 4 mph7 km/h	Tuesday: Mostly cloudy and mild, with a high of 65°F18°C and morning low of 55°F13°C. Light wind from the WNW around 4 mph6 km/h. Tuesday Night: Mostly cloudy, with a low around 54°F12°C. Light wind from the W around 4 mph7 km/h. 14% chance of drizzle overnight.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	66°F19°C	42°F6°C Feels 38°F3°C	0 in0 mm· —	1%	Clear	NE 7 mph11 km/h
DayMostly clear and mild, with a high of 66°F19°C and morning low of 45°F7°C. Breezy from the NE at 7 to 8 mph12 to 12 km/h. Dry air. NightMostly clear, with a low around 42°F6°C. Breezy from the NE at 6 to 7 mph10 to 11 km/h.
	ThursdaySep 24	69°F20°C	41°F5°C Feels 38°F3°C	0 in0 mm· —	1%	Clear	NE 4 mph7 km/h
DayMostly clear and warm, with a high of 69°F20°C and morning low of 44°F7°C. Light wind from the NE around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 41°F5°C. Light wind from the NNE around 4 mph7 km/h.
	FridaySep 25	73°F23°C	45°F7°C Feels 42°F6°C	0 in0 mm· —	29%	Clear	NNE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 73°F23°C and morning low of 47°F9°C. Breezy from the NE at 6 to 8 mph10 to 13 km/h. Dry air. NightPartly cloudy, with a low around 45°F7°C. Breezy from the NNE at 6 to 7 mph9 to 11 km/h.
	SaturdaySep 26	70°F21°C	51°F10°C	0.02 in0.4 mm· 11%	72%	Drizzle	NNE 9 mph14 km/h
DayMostly cloudy and warm, with a high of 70°F21°C and morning low of 52°F11°C. Breezy from the NE at 9 to 10 mph15 to 16 km/h. Dry air. NightMostly cloudy, with a low around 51°F10°C. Breezy from the NNE at 8 to 10 mph13 to 17 km/h. 11% chance of drizzle in the evening.
	SundaySep 27	64°F18°C	56°F13°C	0.24 in6.1 mm· 61%	93%	Light Rain	NE 12 mph20 km/h
DayOvercast and mild, with a high of 64°F18°C and morning low of 56°F14°C. Breezy from the NE at 13 mph21 km/h. 61% chance of light rain throughout the day. Dry air. NightOvercast, with a low around 56°F13°C. Breezy from the NE at 11 to 12 mph18 to 19 km/h. 57% chance of light rain throughout the night.
	MondaySep 28	60°F15°C	56°F13°C	0.14 in3.5 mm· 39%	93%	Light Rain	NE 8 mph13 km/h
DayOvercast and mild, with a high of 60°F15°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h. 38% chance of light rain throughout the day. NightOvercast, with a low around 56°F13°C. Breezy from the NE at 8 to 10 mph12 to 17 km/h. 39% chance of light rain throughout the night.
	TuesdaySep 29	65°F18°C	54°F12°C	0.02 in0.5 mm· 14%	73%	Drizzle	W 4 mph7 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 55°F13°C. Light wind from the WNW around 4 mph6 km/h. NightMostly cloudy, with a low around 54°F12°C. Light wind from the W around 4 mph7 km/h. 14% chance of drizzle overnight.
	WednesdaySep 30	69°F20°C	55°F13°C	0.02 in0.6 mm· 12%	72%	Drizzle	S 5 mph8 km/h
DayMostly cloudy and warm, with a high of 69°F20°C and morning low of 55°F13°C. Light wind from the S around 5 mph8 km/h. NightMostly cloudy, with a low around 55°F13°C. Light wind from the S around 5 mph9 km/h. 12% chance of drizzle in the evening.
	ThursdayOct 1	69°F21°C	57°F14°C	0.13 in3.3 mm· 18%	69%	Showers	S 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 SSW at 8 to 9 mph13 to 14 km/h. 18% chance of drizzle throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the S at 8 to 9 mph12 to 14 km/h. 18% chance of showers throughout the night.
	FridayOct 2	65°F18°C	56°F13°C	0.24 in6.1 mm· 25%	69%	Showers	WSW 8 mph14 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 57°F14°C. Breezy from the WSW at 9 mph14 km/h. 25% chance of light rain throughout the day. NightMostly cloudy, with a low around 56°F13°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 23% chance of showers throughout the night.
	SaturdayOct 3	64°F18°C	53°F11°C	0.17 in4.2 mm· 22%	64%	Showers	WSW 8 mph13 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 53°F12°C. Breezy from the WSW at 8 to 9 mph13 to 14 km/h. 22% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 53°F11°C. Breezy from the WSW at 8 mph12 km/h. 21% chance of showers throughout the night.
	SundayOct 4	64°F18°C	52°F11°C	0.13 in3.4 mm· 23%	67%	Showers	SSW 8 mph13 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 53°F11°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 23% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 52°F11°C. Breezy from the SSW at 8 mph12 km/h. 20% chance of drizzle throughout the night.
	MondayOct 5	61°F16°C	52°F11°C	0.15 in3.9 mm· 24%	66%	Showers	SW 8 mph13 km/h
DayMostly cloudy and mild, with a high of 61°F16°C and morning low of 52°F11°C. Breezy from the WSW at 9 mph14 km/h. 24% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 52°F11°C. Breezy from the SW at 8 mph12 km/h. 20% chance of showers throughout the night.
	TuesdayOct 6	58°F15°C	50°F10°C Feels 46°F8°C	0.17 in4.2 mm· 25%	67%	Showers	WSW 8 mph13 km/h
DayMostly cloudy and mild, with a high of 58°F15°C and morning low of 50°F10°C. Breezy from the W at 9 mph14 km/h. 23% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 50°F10°C. Breezy from the WSW at 8 mph13 km/h. 25% chance of showers throughout the night.
	WednesdayOct 7	57°F14°C	48°F9°C Feels 44°F7°C	0.17 in4.2 mm· 27%	65%	Showers	W 9 mph14 km/h
DayMostly cloudy and mild, with a high of 57°F14°C and morning low of 48°F9°C. Breezy from the W at 9 to 10 mph15 to 17 km/h. 27% chance of light rain throughout the day. Dry air. NightMostly cloudy, with a low around 48°F9°C. Breezy from the WSW at 8 to 9 mph13 to 14 km/h. 23% chance of showers throughout the night.

Nearby Cities

Dorval4 mi7 km Pointe-Claire6 mi9 km Beaconsfield7 mi11 km Côte-Saint-Luc7 mi11 km Kirkland7 mi12 km Sainte-Catherine8 mi13 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.

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Coordinates: 45.3834°N, 73.7492°W·Elevation: 19m·Timezone: America/Toronto·Population: 42,786