Current Conditions

Waterdown, Ontario

72°F22°C

Rain

Wind

S 4 mph7 km/h

Humidity

97%

Cloud Cover

99%

As of Wednesday, September 2, 2026 at 5:05 AM EDT

Today's Outlook

Day

Overcast and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the SW at 8 to 10 mph13 to 15 km/h. 69% chance of rain throughout the day. Heavy, humid air.

Night

Overcast, with a low around 70°F21°C. Light wind from the SW around 4 mph7 km/h. 91% chance of rain throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Rain	High 80°F27°C	Low 70°F21°C	Precip 0.54 in13.6 mm91%	Cloud 91%	Wind SW 6 mph10 km/h	Wednesday: Overcast and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the SW at 8 to 10 mph13 to 15 km/h. 69% chance of rain throughout the day. Heavy, humid air. Wednesday Night: Overcast, with a low around 70°F21°C. Light wind from the SW around 4 mph7 km/h. 91% chance of rain throughout the night.
Showers	High 80°F27°C	Low 67°F20°C	Precip 0.14 in3.6 mm39%	Cloud 68%	Wind WNW 5 mph7 km/h	Thursday: Mostly cloudy and warm, with a high of 80°F27°C and morning low of 68°F20°C. Light wind from the W around 5 mph7 km/h. 35% chance of light rain throughout the day. Humid. Thursday Night: Mostly cloudy, with a low around 67°F20°C. Light wind from the WNW around 5 mph7 km/h. 39% chance of showers throughout the night.
Drizzle	High 78°F26°C	Low 65°F18°C	Precip 0.04 in1.1 mm20%	Cloud 55%	Wind NNW 5 mph8 km/h	Friday: Mostly cloudy and warm, with a high of 78°F26°C and morning low of 65°F18°C. Light wind from the NNW around 5 mph7 km/h. 12% chance of drizzle throughout the day. Friday Night: Partly cloudy, with a low around 65°F18°C. Breezy from the NNW at 6 to 7 mph9 to 12 km/h. 20% chance of drizzle overnight.
Clear	High 75°F24°C	Low 60°F16°C	Precip 0 in0 mm—	Cloud 29%	Wind NNE 6 mph10 km/h	Saturday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 61°F16°C. Breezy from the NNE at 7 to 8 mph11 to 12 km/h. Saturday Night: Mostly clear, with a low around 60°F16°C. Light wind from the NNE around 6 mph10 km/h.
Clear	High 73°F23°C	Low 59°F15°C	Precip 0.01 in0.2 mm7%	Cloud 32%	Wind ENE 5 mph9 km/h	Sunday: Partly cloudy and warm, with a high of 73°F23°C and morning low of 61°F16°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h. Sunday Night: Mostly clear, with a low around 59°F15°C. Light wind from the NE around 5 mph7 km/h.
Clear	High 76°F24°C	Low 56°F13°C	Precip 0 in0 mm—	Cloud 37%	Wind ENE 4 mph6 km/h	Monday: Partly cloudy and warm, with a high of 76°F24°C and morning low of 58°F14°C. Light wind from the ENE around 4 mph6 km/h. Monday Night: Partly cloudy, with a low around 56°F13°C. Light wind from the NE around 4 mph6 km/h.
Partly Cloudy	High 75°F24°C	Low 59°F15°C	Precip 0.01 in0.2 mm5%	Cloud 77%	Wind ESE 5 mph8 km/h	Tuesday: Overcast and warm, with a high of 75°F24°C and morning low of 60°F16°C. Light wind from the ESE around 5 mph9 km/h. Tuesday Night: Mostly cloudy, with a low around 59°F15°C. Light wind from the E around 5 mph8 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	80°F27°C	70°F21°C	0.54 in13.6 mm· 91%	91%	Rain	SW 6 mph10 km/h
DayOvercast and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the SW at 8 to 10 mph13 to 15 km/h. 69% chance of rain throughout the day. Heavy, humid air. NightOvercast, with a low around 70°F21°C. Light wind from the SW around 4 mph7 km/h. 91% chance of rain throughout the night.
	ThursdaySep 3	80°F27°C	67°F20°C	0.14 in3.6 mm· 39%	68%	Showers	WNW 5 mph7 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 68°F20°C. Light wind from the W around 5 mph7 km/h. 35% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 67°F20°C. Light wind from the WNW around 5 mph7 km/h. 39% chance of showers throughout the night.
	FridaySep 4	78°F26°C	65°F18°C	0.04 in1.1 mm· 20%	55%	Drizzle	NNW 5 mph8 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 65°F18°C. Light wind from the NNW around 5 mph7 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 65°F18°C. Breezy from the NNW at 6 to 7 mph9 to 12 km/h. 20% chance of drizzle overnight.
	SaturdaySep 5	75°F24°C	60°F16°C	0 in0 mm· —	29%	Clear	NNE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 61°F16°C. Breezy from the NNE at 7 to 8 mph11 to 12 km/h. NightMostly clear, with a low around 60°F16°C. Light wind from the NNE around 6 mph10 km/h.
	SundaySep 6	73°F23°C	59°F15°C	0.01 in0.2 mm· 7%	32%	Clear	ENE 5 mph9 km/h
DayPartly cloudy and warm, with a high of 73°F23°C and morning low of 61°F16°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h. NightMostly clear, with a low around 59°F15°C. Light wind from the NE around 5 mph7 km/h.
	MondaySep 7	76°F24°C	56°F13°C	0 in0 mm· —	37%	Clear	ENE 4 mph6 km/h
DayPartly cloudy and warm, with a high of 76°F24°C and morning low of 58°F14°C. Light wind from the ENE around 4 mph6 km/h. NightPartly cloudy, with a low around 56°F13°C. Light wind from the NE around 4 mph6 km/h.
	TuesdaySep 8	75°F24°C	59°F15°C	0.01 in0.2 mm· 5%	77%	Partly Cloudy	ESE 5 mph8 km/h
DayOvercast and warm, with a high of 75°F24°C and morning low of 60°F16°C. Light wind from the ESE around 5 mph9 km/h. NightMostly cloudy, with a low around 59°F15°C. Light wind from the E around 5 mph8 km/h.
	WednesdaySep 9	80°F27°C	65°F18°C	0.07 in1.7 mm· 20%	68%	Drizzle	SW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 67°F19°C. Breezy from the SW at 9 to 10 mph14 to 16 km/h. 20% chance of drizzle throughout the day. Humid. NightMostly cloudy, with a low around 65°F18°C. Breezy from the SW at 7 to 8 mph12 to 14 km/h. 13% chance of drizzle throughout the night.
	ThursdaySep 10	80°F27°C	69°F21°C	0.13 in3.2 mm· 20%	58%	Showers	W 9 mph14 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 70°F21°C. Breezy from the W at 10 to 11 mph16 to 17 km/h. 20% chance of showers throughout the day. Humid. NightPartly cloudy, with a low around 69°F21°C. Breezy from the W at 8 mph13 km/h. 19% chance of showers throughout the night.
	FridaySep 11	75°F24°C	65°F18°C	0.15 in3.9 mm· 20%	57%	Showers	W 7 mph12 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the W at 8 mph13 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F18°C. Breezy from the WNW at 7 mph11 km/h. 18% chance of showers throughout the night.
	SaturdaySep 12	74°F23°C	62°F17°C	0.16 in4.1 mm· 23%	62%	Showers	WSW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 63°F17°C. Breezy from the WSW at 8 to 9 mph13 to 15 km/h. 23% chance of drizzle throughout the day. NightMostly cloudy, with a low around 62°F17°C. Breezy from the WSW at 7 to 8 mph11 to 12 km/h. 23% chance of showers throughout the night.
	SundaySep 13	74°F23°C	63°F17°C	0.24 in6 mm· 26%	66%	Showers	WSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 64°F18°C. Breezy from the SW at 9 to 10 mph14 to 15 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 mph12 to 12 km/h. 26% chance of showers throughout the night.
	MondaySep 14	73°F23°C	62°F17°C	0.14 in3.5 mm· 19%	61%	Showers	WSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 62°F17°C. Breezy from the WSW at 9 to 10 mph14 to 15 km/h. 16% chance of showers throughout the day. NightMostly cloudy, with a low around 62°F17°C. Breezy from the W at 7 mph11 km/h. 19% chance of showers throughout the night.
	TuesdaySep 15	72°F22°C	60°F15°C	0.1 in2.5 mm· 17%	53%	Showers	WSW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 60°F16°C. Breezy from the WSW at 8 mph12 km/h. 17% chance of drizzle throughout the day. NightPartly cloudy, with a low around 60°F15°C. Breezy from the WSW at 7 mph11 km/h. 13% chance of showers throughout the night.
	WednesdaySep 16	72°F22°C	59°F15°C	0.09 in2.3 mm· 16%	52%	Drizzle	WSW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 60°F16°C. Breezy from the WSW at 8 mph12 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 59°F15°C. Breezy from the W at 7 mph11 km/h. 14% chance of drizzle throughout the night.

Nearby Cities

Burlington4 mi7 km Hamilton6 mi10 km Ancaster10 mi15 km Stoney Creek10 mi16 km Milton13 mi20 km Oakville13 mi21 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: 43.3334°N, 79.8829°W·Elevation: 236m·Timezone: America/Toronto·Population: 24,400