Current Conditions

Grimsby, Ontario

80°F26°C

Rain

Wind

SSW 10 mph16 km/h

Humidity

82%

Cloud Cover

85%

As of Wednesday, September 2, 2026 at 1:29 PM EDT

Today's Outlook

Day

Overcast and warm, with a high of 80°F26°C and morning low of 74°F23°C. Breezy from the SW at 9 to 10 mph14 to 16 km/h. 60% chance of light rain throughout the day. Heavy, humid air.

Night

Overcast, with a low around 72°F22°C. Breezy from the SW at 7 to 8 mph11 to 12 km/h. 92% chance of rain throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Rain	High 80°F26°C	Low 72°F22°C	Precip 0.51 in12.9 mm92%	Cloud 94%	Wind SW 8 mph13 km/h	Wednesday: Overcast and warm, with a high of 80°F26°C and morning low of 74°F23°C. Breezy from the SW at 9 to 10 mph14 to 16 km/h. 60% chance of light rain throughout the day. Heavy, humid air. Wednesday Night: Overcast, with a low around 72°F22°C. Breezy from the SW at 7 to 8 mph11 to 12 km/h. 92% chance of rain throughout the night.
Light Rain	High 78°F26°C	Low 69°F21°C	Precip 0.24 in6.2 mm54%	Cloud 73%	Wind W 5 mph8 km/h	Thursday: Overcast and warm, with a high of 78°F26°C and morning low of 70°F21°C. Light wind from the W around 5 mph7 km/h. 44% chance of light rain throughout the day. Humid. Thursday Night: Mostly cloudy, with a low around 69°F21°C. Breezy from the W at 6 to 7 mph10 to 12 km/h. 54% chance of showers throughout the night.
Showers	High 77°F25°C	Low 67°F20°C	Precip 0.06 in1.5 mm32%	Cloud 57%	Wind NNW 5 mph9 km/h	Friday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 67°F20°C. Light wind from the NNW around 5 mph7 km/h. Friday Night: Partly cloudy, with a low around 68°F20°C. Breezy from the N at 6 to 9 mph10 to 14 km/h. 32% chance of showers overnight.
Clear	High 74°F23°C	Low 64°F18°C	Precip 0 in0 mm—	Cloud 25%	Wind NNE 7 mph11 km/h	Saturday: Partly cloudy and warm, with a high of 74°F23°C and morning low of 65°F18°C. Breezy from the NNE at 7 to 8 mph11 to 12 km/h. Saturday Night: Mostly clear, with a low around 64°F18°C. Breezy from the NNE at 7 to 8 mph11 to 12 km/h.
Drizzle	High 71°F22°C	Low 64°F18°C	Precip 0.02 in0.4 mm21%	Cloud 31%	Wind ENE 6 mph10 km/h	Sunday: Partly cloudy and warm, with a high of 71°F22°C and morning low of 64°F18°C. Breezy from the ENE at 7 to 8 mph12 to 13 km/h. 21% chance of drizzle around midday. Sunday Night: Partly cloudy, with a low around 64°F18°C. Light wind from the ENE around 5 mph9 km/h.
Clear	High 74°F23°C	Low 62°F17°C	Precip 0 in0 mm—	Cloud 38%	Wind E 4 mph7 km/h	Monday: Partly cloudy and warm, with a high of 74°F23°C and morning low of 63°F17°C. Light wind from the ENE around 4 mph7 km/h. Monday Night: Partly cloudy, with a low around 62°F17°C. Light wind from the E around 4 mph7 km/h.
Partly Cloudy	High 74°F24°C	Low 64°F18°C	Precip 0.02 in0.5 mm8%	Cloud 75%	Wind ESE 6 mph10 km/h	Tuesday: Overcast and warm, with a high of 74°F24°C and morning low of 65°F18°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h. Tuesday Night: Mostly cloudy, with a low around 64°F18°C. Breezy from the ESE at 6 to 7 mph9 to 12 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	80°F26°C	72°F22°C	0.51 in12.9 mm· 92%	94%	Rain	SW 8 mph13 km/h
DayOvercast and warm, with a high of 80°F26°C and morning low of 74°F23°C. Breezy from the SW at 9 to 10 mph14 to 16 km/h. 60% chance of light rain throughout the day. Heavy, humid air. NightOvercast, with a low around 72°F22°C. Breezy from the SW at 7 to 8 mph11 to 12 km/h. 92% chance of rain throughout the night.
	ThursdaySep 3	78°F26°C	69°F21°C	0.24 in6.2 mm· 54%	73%	Light Rain	W 5 mph8 km/h
DayOvercast and warm, with a high of 78°F26°C and morning low of 70°F21°C. Light wind from the W around 5 mph7 km/h. 44% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 69°F21°C. Breezy from the W at 6 to 7 mph10 to 12 km/h. 54% chance of showers throughout the night.
	FridaySep 4	77°F25°C	67°F20°C	0.06 in1.5 mm· 32%	57%	Showers	NNW 5 mph9 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 67°F20°C. Light wind from the NNW around 5 mph7 km/h. NightPartly cloudy, with a low around 68°F20°C. Breezy from the N at 6 to 9 mph10 to 14 km/h. 32% chance of showers overnight.
	SaturdaySep 5	74°F23°C	64°F18°C	0 in0 mm· —	25%	Clear	NNE 7 mph11 km/h
DayPartly cloudy and warm, with a high of 74°F23°C and morning low of 65°F18°C. Breezy from the NNE at 7 to 8 mph11 to 12 km/h. NightMostly clear, with a low around 64°F18°C. Breezy from the NNE at 7 to 8 mph11 to 12 km/h.
	SundaySep 6	71°F22°C	64°F18°C	0.02 in0.4 mm· 21%	31%	Drizzle	ENE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 71°F22°C and morning low of 64°F18°C. Breezy from the ENE at 7 to 8 mph12 to 13 km/h. 21% chance of drizzle around midday. NightPartly cloudy, with a low around 64°F18°C. Light wind from the ENE around 5 mph9 km/h.
	MondaySep 7	74°F23°C	62°F17°C	0 in0 mm· —	38%	Clear	E 4 mph7 km/h
DayPartly cloudy and warm, with a high of 74°F23°C and morning low of 63°F17°C. Light wind from the ENE around 4 mph7 km/h. NightPartly cloudy, with a low around 62°F17°C. Light wind from the E around 4 mph7 km/h.
	TuesdaySep 8	74°F24°C	64°F18°C	0.02 in0.5 mm· 8%	75%	Partly Cloudy	ESE 6 mph10 km/h
DayOvercast and warm, with a high of 74°F24°C and morning low of 65°F18°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h. NightMostly cloudy, with a low around 64°F18°C. Breezy from the ESE at 6 to 7 mph9 to 12 km/h.
	WednesdaySep 9	81°F27°C	69°F21°C	0.06 in1.4 mm· 15%	57%	Drizzle	SW 11 mph17 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 71°F22°C. Breezy from the SW at 11 to 13 mph18 to 20 km/h. 15% chance of drizzle throughout the day. Humid. NightMostly cloudy, with a low around 69°F21°C. Breezy from the SW at 10 to 11 mph16 to 18 km/h. 13% chance of drizzle throughout the night.
	ThursdaySep 10	78°F26°C	70°F21°C	0.12 in3.1 mm· 24%	52%	Showers	WSW 10 mph16 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 71°F22°C. Breezy from the WSW at 10 to 11 mph17 to 18 km/h. 24% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 70°F21°C. Breezy from the WSW at 10 to 11 mph15 to 17 km/h. 17% chance of showers throughout the night.
	FridaySep 11	74°F23°C	67°F19°C	0.11 in2.9 mm· 19%	59%	Drizzle	WSW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 67°F19°C. Breezy from the WSW at 8 mph13 km/h. 19% chance of drizzle throughout the day. NightMostly cloudy, with a low around 67°F19°C. Breezy from the W at 8 mph12 km/h. 14% chance of drizzle throughout the night.
	SaturdaySep 12	74°F24°C	66°F19°C	0.15 in3.9 mm· 25%	61%	Showers	SW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 74°F24°C and morning low of 66°F19°C. Breezy from the SW at 9 mph14 km/h. 22% chance of showers throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 25% chance of showers throughout the night.
	SundaySep 13	74°F23°C	66°F19°C	0.16 in4 mm· 19%	59%	Showers	WSW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 66°F19°C. Breezy from the WSW at 10 mph16 km/h. 18% chance of showers throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the WSW at 9 mph14 km/h. 19% chance of showers throughout the night.
	MondaySep 14	72°F22°C	64°F18°C	0.11 in2.7 mm· 18%	58%	Drizzle	W 9 mph14 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 64°F18°C. Breezy from the W at 9 mph14 km/h. 18% chance of drizzle throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the W at 8 to 9 mph14 to 14 km/h. 18% chance of drizzle throughout the night.
	TuesdaySep 15	72°F22°C	63°F17°C	0.09 in2.3 mm· 15%	48%	Drizzle	W 9 mph14 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 63°F17°C. Breezy from the W at 9 mph14 km/h. 15% chance of drizzle throughout the day. NightPartly cloudy, with a low around 63°F17°C. Breezy from the W at 8 to 9 mph13 to 14 km/h. 14% chance of drizzle throughout the night.
	WednesdaySep 16	71°F22°C	62°F16°C	0.08 in2 mm· 16%	49%	Drizzle	SW 8 mph14 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 62°F17°C. Breezy from the SW at 9 mph14 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 62°F16°C. Breezy from the SW at 8 to 9 mph13 to 14 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