Current Conditions

Ancaster, Ontario

68°F20°C

Cloudy

Wind

SE 4 mph7 km/h

Humidity

76%

Cloud Cover

96%

As of Tuesday, September 8, 2026 at 8:07 PM EDT

Today's Outlook

Night

Overcast, with a low around 65°F19°C. Light wind from the SE around 4 mph7 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Cloudy	High 76°F24°C	Low 65°F19°C	Precip 0 in0 mm—	Cloud 98%	Wind SE 4 mph7 km/h	Tuesday: Overcast and warm, with a high of 76°F24°C. Light wind from the SSE around 5 mph7 km/h. Tuesday Night: Overcast, with a low around 65°F19°C. Light wind from the SE around 4 mph7 km/h.
Light Rain	High 75°F24°C	Low 67°F19°C	Precip 0.36 in9.1 mm95%	Cloud 90%	Wind SW 9 mph14 km/h	Wednesday: Overcast and warm, with a high of 75°F24°C and morning low of 70°F21°C. Breezy from the SW at 10 to 12 mph16 to 19 km/h. 95% chance of light rain throughout the day. Humid. Wednesday Night: Overcast, with a low around 67°F19°C. Breezy from the WSW at 8 to 11 mph12 to 18 km/h. 87% chance of light rain throughout the night.
Partly Cloudy	High 75°F24°C	Low 59°F15°C	Precip 0 in0 mm—	Cloud 66%	Wind WNW 7 mph12 km/h	Thursday: Overcast and warm, with a high of 75°F24°C and morning low of 64°F18°C. Breezy from the WNW at 8 to 10 mph12 to 16 km/h. Thursday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the WNW at 7 to 9 mph11 to 15 km/h.
Clear	High 74°F23°C	Low 50°F10°C	Precip 0 in0 mm—	Cloud 16%	Wind W 4 mph6 km/h	Friday: Mostly clear and warm, with a high of 74°F23°C and morning low of 52°F11°C. Light wind from the WNW around 4 mph6 km/h. Friday Night: Mostly clear, with a low around 50°F10°C. Light wind from the SW around 5 mph7 km/h.
Drizzle	High 78°F26°C	Low 55°F13°C	Precip 0.04 in1.1 mm19%	Cloud 56%	Wind S 6 mph9 km/h	Saturday: Mostly cloudy and warm, with a high of 78°F26°C and morning low of 58°F14°C. Breezy from the S at 6 to 8 mph10 to 13 km/h. 19% chance of drizzle throughout the day. Saturday Night: Mostly cloudy, with a low around 55°F13°C. Breezy from the S at 5 to 7 mph8 to 11 km/h. 11% chance of drizzle overnight.
Drizzle	High 75°F24°C	Low 59°F15°C	Precip 0.08 in2.1 mm20%	Cloud 42%	Wind WNW 8 mph13 km/h	Sunday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the WNW at 8 to 11 mph13 to 18 km/h. 20% chance of drizzle throughout the day. Sunday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the WNW at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the night.
Partly Cloudy	High 69°F20°C	Low 52°F11°C	Precip 0.02 in0.6 mm6%	Cloud 47%	Wind NW 6 mph9 km/h	Monday: Mostly cloudy and warm, with a high of 69°F20°C and morning low of 53°F12°C. Light wind from the NNW around 6 mph9 km/h. Dry air. Monday Night: Partly cloudy, with a low around 52°F11°C. Light wind from the NW around 6 mph9 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 8	76°F24°C	65°F19°C	0 in0 mm· —	98%	Cloudy	SE 4 mph7 km/h
DayOvercast and warm, with a high of 76°F24°C. Light wind from the SSE around 5 mph7 km/h. NightOvercast, with a low around 65°F19°C. Light wind from the SE around 4 mph7 km/h.
	WednesdaySep 9	75°F24°C	67°F19°C	0.36 in9.1 mm· 95%	90%	Light Rain	SW 9 mph14 km/h
DayOvercast and warm, with a high of 75°F24°C and morning low of 70°F21°C. Breezy from the SW at 10 to 12 mph16 to 19 km/h. 95% chance of light rain throughout the day. Humid. NightOvercast, with a low around 67°F19°C. Breezy from the WSW at 8 to 11 mph12 to 18 km/h. 87% chance of light rain throughout the night.
	ThursdaySep 10	75°F24°C	59°F15°C	0 in0 mm· —	66%	Partly Cloudy	WNW 7 mph12 km/h
DayOvercast and warm, with a high of 75°F24°C and morning low of 64°F18°C. Breezy from the WNW at 8 to 10 mph12 to 16 km/h. NightPartly cloudy, with a low around 59°F15°C. Breezy from the WNW at 7 to 9 mph11 to 15 km/h.
	FridaySep 11	74°F23°C	50°F10°C	0 in0 mm· —	16%	Clear	W 4 mph6 km/h
DayMostly clear and warm, with a high of 74°F23°C and morning low of 52°F11°C. Light wind from the WNW around 4 mph6 km/h. NightMostly clear, with a low around 50°F10°C. Light wind from the SW around 5 mph7 km/h.
	SaturdaySep 12	78°F26°C	55°F13°C	0.04 in1.1 mm· 19%	56%	Drizzle	S 6 mph9 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 58°F14°C. Breezy from the S at 6 to 8 mph10 to 13 km/h. 19% chance of drizzle throughout the day. NightMostly cloudy, with a low around 55°F13°C. Breezy from the S at 5 to 7 mph8 to 11 km/h. 11% chance of drizzle overnight.
	SundaySep 13	75°F24°C	59°F15°C	0.08 in2.1 mm· 20%	42%	Drizzle	WNW 8 mph13 km/h
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the WNW at 8 to 11 mph13 to 18 km/h. 20% chance of drizzle throughout the day. NightPartly cloudy, with a low around 59°F15°C. Breezy from the WNW at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the night.
	MondaySep 14	69°F20°C	52°F11°C	0.02 in0.6 mm· 6%	47%	Partly Cloudy	NW 6 mph9 km/h
DayMostly cloudy and warm, with a high of 69°F20°C and morning low of 53°F12°C. Light wind from the NNW around 6 mph9 km/h. Dry air. NightPartly cloudy, with a low around 52°F11°C. Light wind from the NW around 6 mph9 km/h.
	TuesdaySep 15	77°F25°C	56°F13°C	0.12 in3.1 mm· 32%	65%	Showers	SSW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 60°F16°C. Breezy from the SSW at 10 to 12 mph17 to 19 km/h. 19% chance of drizzle throughout the day. NightMostly cloudy, with a low around 56°F13°C. Breezy from the SSW at 8 to 9 mph12 to 14 km/h. 32% chance of showers throughout the night.
	WednesdaySep 16	75°F24°C	63°F17°C	0.15 in3.8 mm· 32%	65%	Showers	W 7 mph11 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 63°F17°C. Breezy from the W at 7 mph11 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the WSW at 7 to 8 mph11 to 13 km/h. 32% chance of showers throughout the night.
	ThursdaySep 17	74°F24°C	60°F16°C	0.14 in3.5 mm· 20%	64%	Showers	SSE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 74°F24°C and morning low of 61°F16°C. Breezy from the S at 7 to 8 mph11 to 12 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 60°F16°C. Breezy from the ESE at 6 to 7 mph10 to 12 km/h. 20% chance of showers throughout the night.
	FridaySep 18	75°F24°C	63°F17°C	0.15 in3.7 mm· 25%	54%	Showers	WSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 64°F18°C. Breezy from the WSW at 9 to 10 mph14 to 15 km/h. 25% chance of showers throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the WSW at 8 mph13 km/h. 20% chance of showers throughout the night.
	SaturdaySep 19	68°F20°C	57°F14°C	0.14 in3.5 mm· 23%	60%	Showers	WNW 8 mph13 km/h
DayMostly cloudy and mild, with a high of 68°F20°C and morning low of 58°F14°C. Breezy from the WNW at 8 to 9 mph14 to 15 km/h. 23% chance of drizzle throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the WNW at 8 mph12 km/h. 18% chance of showers throughout the night.
	SundaySep 20	65°F18°C	53°F12°C	0.11 in2.7 mm· 20%	59%	Showers	NW 8 mph12 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 53°F12°C. Breezy from the NW at 8 to 9 mph13 to 14 km/h. 15% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 53°F12°C. Breezy from the NW at 7 mph11 km/h. 20% chance of showers throughout the night.
	MondaySep 21	64°F18°C	49°F10°C	0.08 in2.1 mm· 14%	51%	Drizzle	NW 7 mph11 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 49°F10°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 49°F10°C. Light wind from the NW around 6 mph10 km/h. 12% chance of drizzle throughout the night.
	TuesdaySep 22	65°F18°C	49°F9°C Feels 46°F8°C	0.09 in2.3 mm· 14%	53%	Drizzle	WSW 7 mph11 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 50°F10°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 49°F9°C. Light wind from the WNW around 6 mph10 km/h. 11% chance of drizzle throughout the night.

Nearby Cities

Hamilton7 mi12 km Waterdown10 mi15 km Stoney Creek11 mi18 km Burlington14 mi22 km Brantford15 mi25 km Christopher-Champlain18 mi29 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: 43.2181°N, 79.9872°W·Elevation: 253m·Timezone: America/Toronto·Population: 40,557