Current Conditions

Grimsby, Ontario

74°F24°C

Cloudy

Wind

WNW 5 mph8 km/h

Humidity

66%

Cloud Cover

85%

As of Thursday, August 13, 2026 at 9:33 AM EDT

Today's Outlook

Day

Overcast and warm, with a high of 80°F27°C and morning low of 68°F20°C. Light wind from the W around 6 mph9 km/h.

Night

Mostly cloudy, with a low around 72°F22°C. Light wind from the NW around 6 mph9 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Cloudy	High 80°F27°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 83%	Wind WNW 6 mph9 km/h	Thursday: Overcast and warm, with a high of 80°F27°C and morning low of 68°F20°C. Light wind from the W around 6 mph9 km/h. Thursday Night: Mostly cloudy, with a low around 72°F22°C. Light wind from the NW around 6 mph9 km/h.
Partly Cloudy	High 78°F26°C	Low 66°F19°C	Precip 0 in0 mm—	Cloud 58%	Wind NNE 4 mph7 km/h	Friday: Mostly cloudy and warm, with a high of 78°F26°C and morning low of 68°F20°C. Light wind from the NNE around 4 mph6 km/h. Friday Night: Partly cloudy, with a low around 66°F19°C. Light wind from the N around 5 mph7 km/h.
Clear	High 77°F25°C	Low 67°F20°C	Precip 0 in0.1 mm2%	Cloud 36%	Wind ENE 7 mph12 km/h	Saturday: Partly cloudy and warm, with a high of 77°F25°C and morning low of 69°F20°C. Breezy from the ENE at 7 to 9 mph12 to 14 km/h. Saturday Night: Partly cloudy, with a low around 67°F20°C. Breezy from the ENE at 7 to 9 mph11 to 14 km/h.
Light Rain	High 77°F25°C	Low 68°F20°C	Precip 0.21 in5.4 mm67%	Cloud 76%	Wind SSE 6 mph10 km/h	Sunday: Overcast and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the S at 6 to 7 mph10 to 11 km/h. 67% chance of light rain throughout the day. Humid. Sunday Night: Mostly cloudy, with a low around 68°F20°C. Breezy from the E at 6 to 7 mph10 to 12 km/h. 58% chance of showers throughout the night.
Drizzle	High 76°F24°C	Low 69°F20°C	Precip 0.07 in1.8 mm32%	Cloud 61%	Wind NNW 7 mph11 km/h	Monday: Mostly cloudy and warm, with a high of 76°F24°C and morning low of 70°F21°C. Breezy from the NNW at 7 to 8 mph11 to 13 km/h. 32% chance of drizzle throughout the day. Humid. Monday Night: Mostly cloudy, with a low around 69°F20°C. Breezy from the NNW at 6 to 7 mph10 to 11 km/h. 17% chance of drizzle overnight.
Clear	High 77°F25°C	Low 64°F18°C	Precip 0 in0.1 mm2%	Cloud 39%	Wind W 6 mph10 km/h	Tuesday: Partly cloudy and warm, with a high of 77°F25°C and morning low of 65°F19°C. Light wind from the W around 5 mph8 km/h. Tuesday Night: Partly cloudy, with a low around 64°F18°C. Breezy from the W at 7 to 8 mph11 to 13 km/h.
Light Rain	High 76°F24°C	Low 67°F20°C	Precip 0.13 in3.4 mm37%	Cloud 72%	Wind SW 9 mph14 km/h	Wednesday: Overcast and warm, with a high of 76°F24°C and morning low of 69°F20°C. Breezy from the SW at 10 to 11 mph15 to 18 km/h. 37% chance of light rain throughout the day. Wednesday Night: Mostly cloudy, with a low around 67°F20°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 35% chance of showers in the evening.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	80°F27°C	68°F20°C	0 in0 mm· —	83%	Cloudy	WNW 6 mph9 km/h
DayOvercast and warm, with a high of 80°F27°C and morning low of 68°F20°C. Light wind from the W around 6 mph9 km/h. NightMostly cloudy, with a low around 72°F22°C. Light wind from the NW around 6 mph9 km/h.
	FridayAug 14	78°F26°C	66°F19°C	0 in0 mm· —	58%	Partly Cloudy	NNE 4 mph7 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 68°F20°C. Light wind from the NNE around 4 mph6 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the N around 5 mph7 km/h.
	SaturdayAug 15	77°F25°C	67°F20°C	0 in0.1 mm· 2%	36%	Clear	ENE 7 mph12 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 69°F20°C. Breezy from the ENE at 7 to 9 mph12 to 14 km/h. NightPartly cloudy, with a low around 67°F20°C. Breezy from the ENE at 7 to 9 mph11 to 14 km/h.
	SundayAug 16	77°F25°C	68°F20°C	0.21 in5.4 mm· 67%	76%	Light Rain	SSE 6 mph10 km/h
DayOvercast and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the S at 6 to 7 mph10 to 11 km/h. 67% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 68°F20°C. Breezy from the E at 6 to 7 mph10 to 12 km/h. 58% chance of showers throughout the night.
	MondayAug 17	76°F24°C	69°F20°C	0.07 in1.8 mm· 32%	61%	Drizzle	NNW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 70°F21°C. Breezy from the NNW at 7 to 8 mph11 to 13 km/h. 32% chance of drizzle throughout the day. Humid. NightMostly cloudy, with a low around 69°F20°C. Breezy from the NNW at 6 to 7 mph10 to 11 km/h. 17% chance of drizzle overnight.
	TuesdayAug 18	77°F25°C	64°F18°C	0 in0.1 mm· 2%	39%	Clear	W 6 mph10 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 65°F19°C. Light wind from the W around 5 mph8 km/h. NightPartly cloudy, with a low around 64°F18°C. Breezy from the W at 7 to 8 mph11 to 13 km/h.
	WednesdayAug 19	76°F24°C	67°F20°C	0.13 in3.4 mm· 37%	72%	Light Rain	SW 9 mph14 km/h
DayOvercast and warm, with a high of 76°F24°C and morning low of 69°F20°C. Breezy from the SW at 10 to 11 mph15 to 18 km/h. 37% chance of light rain throughout the day. NightMostly cloudy, with a low around 67°F20°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 35% chance of showers in the evening.
	ThursdayAug 20	73°F23°C	66°F19°C	0.19 in4.8 mm· 37%	57%	Showers	WNW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 68°F20°C. Breezy from the WNW at 9 to 10 mph15 to 15 km/h. 30% chance of showers throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the W at 9 mph14 km/h. 37% chance of showers throughout the night.
	FridayAug 21	73°F23°C	62°F17°C	0.07 in1.8 mm· 12%	41%	Drizzle	NW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 73°F23°C and morning low of 63°F17°C. Breezy from the NW at 7 mph12 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 62°F17°C. Breezy from the NW at 7 to 8 mph11 to 12 km/h. 12% chance of drizzle throughout the night.
	SaturdayAug 22	74°F24°C	63°F17°C	0.07 in1.8 mm· 13%	44%	Drizzle	W 7 mph11 km/h
DayPartly cloudy and warm, with a high of 74°F24°C and morning low of 64°F18°C. Breezy from the WSW at 7 mph11 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 63°F17°C. Breezy from the W at 7 mph11 km/h. 10% chance of drizzle throughout the night.
	SundayAug 23	76°F24°C	64°F18°C	0.05 in1.3 mm· 14%	47%	Drizzle	W 7 mph11 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 65°F19°C. Breezy from the WSW at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the day. NightPartly cloudy, with a low around 64°F18°C. Breezy from the W at 7 mph11 km/h. 12% chance of drizzle throughout the night.
	MondayAug 24	77°F25°C	65°F19°C	0.05 in1.3 mm· 14%	41%	Drizzle	W 7 mph11 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 66°F19°C. Breezy from the WSW at 7 to 8 mph11 to 13 km/h. 14% chance of drizzle throughout the day. NightPartly cloudy, with a low around 65°F19°C. Breezy from the W at 7 mph11 km/h. 12% chance of drizzle overnight.
	TuesdayAug 25	77°F25°C	65°F19°C	0.06 in1.5 mm· 11%	40%	Drizzle	W 7 mph11 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 66°F19°C. Breezy from the WSW at 7 mph11 km/h. 11% chance of drizzle throughout the day. NightPartly cloudy, with a low around 65°F19°C. Breezy from the W at 7 mph11 km/h.
	WednesdayAug 26	75°F24°C	65°F18°C	0.07 in1.7 mm· 17%	44%	Drizzle	WNW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 66°F19°C. Breezy from the WNW at 7 to 8 mph12 to 12 km/h. 17% chance of drizzle throughout the day. NightPartly cloudy, with a low around 65°F18°C. Breezy from the WNW at 7 mph11 km/h. 10% chance of drizzle throughout the night.
	ThursdayAug 27	75°F24°C	64°F18°C	0.05 in1.2 mm· 15%	43%	Drizzle	WNW 8 mph12 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 mph12 km/h. 15% chance of drizzle in the afternoon. NightPartly cloudy, with a low around 64°F18°C. Breezy from the NW at 7 to 8 mph12 to 12 km/h. 12% chance of drizzle throughout the night.

Nearby Cities

Stoney Creek10 mi16 km Hamilton15 mi24 km St. Catharines16 mi26 km Oakville18 mi29 km Waterdown18 mi30 km Burlington19 mi30 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: 43.2001°N, 79.5663°W·Elevation: 88m·Timezone: America/Toronto·Population: 27,314