Current Conditions

Grimsby, Ontario

75°F24°C

Cloudy

Wind

SE 4 mph6 km/h

Humidity

58%

Cloud Cover

93%

As of Tuesday, September 8, 2026 at 12:54 PM EDT

Today's Outlook

Day

Overcast and warm, with a high of 75°F24°C and morning low of 64°F18°C. Light wind from the ESE around 3 mph5 km/h.

Night

Overcast, with a low around 69°F21°C. Light wind from the ESE around 5 mph9 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Cloudy	High 75°F24°C	Low 64°F18°C	Precip 0 in0 mm—	Cloud 87%	Wind ESE 4 mph6 km/h	Tuesday: Overcast and warm, with a high of 75°F24°C and morning low of 64°F18°C. Light wind from the ESE around 3 mph5 km/h. Tuesday Night: Overcast, with a low around 69°F21°C. Light wind from the ESE around 5 mph9 km/h.
Rain	High 75°F24°C	Low 70°F21°C	Precip 0.35 in8.8 mm97%	Cloud 89%	Wind SW 11 mph18 km/h	Wednesday: Overcast and warm, with a high of 75°F24°C. Breezy from the SW at 12 to 15 mph20 to 24 km/h. 97% chance of rain throughout the day. Humid. Wednesday Night: Overcast, with a low around 70°F21°C. Breezy from the SW at 10 to 12 mph15 to 20 km/h. 65% chance of light rain throughout the night.
Partly Cloudy	High 74°F23°C	Low 63°F17°C	Precip 0 in0.1 mm5%	Cloud 58%	Wind WNW 9 mph14 km/h	Thursday: Overcast and warm, with a high of 74°F23°C and morning low of 67°F20°C. Breezy from the W at 9 to 10 mph14 to 16 km/h. Thursday Night: Partly cloudy, with a low around 63°F17°C. Breezy from the WNW at 9 to 10 mph14 to 17 km/h.
Clear	High 72°F22°C	Low 58°F14°C	Precip 0 in0 mm—	Cloud 12%	Wind W 5 mph8 km/h	Friday: Mostly clear and warm, with a high of 72°F22°C and morning low of 59°F15°C. Light wind from the W around 4 mph7 km/h. Friday Night: Mostly clear, with a low around 58°F14°C. Light wind from the WSW around 6 mph10 km/h.
Drizzle	High 76°F25°C	Low 62°F16°C	Precip 0.03 in0.8 mm18%	Cloud 45%	Wind S 7 mph11 km/h	Saturday: Partly cloudy and warm, with a high of 76°F25°C and morning low of 63°F17°C. Breezy from the S at 6 to 7 mph10 to 12 km/h. Saturday Night: Mostly cloudy, with a low around 62°F16°C. Breezy from the S at 7 to 9 mph11 to 14 km/h. 18% chance of drizzle in the evening.
Showers	High 75°F24°C	Low 65°F18°C	Precip 0.09 in2.2 mm20%	Cloud 44%	Wind W 8 mph13 km/h	Sunday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 68°F20°C. Breezy from the W at 8 to 9 mph13 to 15 km/h. 20% chance of showers throughout the day. Sunday Night: Partly cloudy, with a low around 65°F18°C. Breezy from the W at 9 to 10 mph14 to 16 km/h. 16% chance of drizzle throughout the night.
Partly Cloudy	High 69°F20°C	Low 59°F15°C	Precip 0.04 in0.9 mm6%	Cloud 50%	Wind N 7 mph12 km/h	Monday: Mostly cloudy and warm, with a high of 69°F20°C and morning low of 59°F15°C. Breezy from the N at 7 to 8 mph11 to 13 km/h. Monday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the N at 8 mph13 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 8	75°F24°C	64°F18°C	0 in0 mm· —	87%	Cloudy	ESE 4 mph6 km/h
DayOvercast and warm, with a high of 75°F24°C and morning low of 64°F18°C. Light wind from the ESE around 3 mph5 km/h. NightOvercast, with a low around 69°F21°C. Light wind from the ESE around 5 mph9 km/h.
	WednesdaySep 9	75°F24°C	70°F21°C	0.35 in8.8 mm· 97%	89%	Rain	SW 11 mph18 km/h
DayOvercast and warm, with a high of 75°F24°C. Breezy from the SW at 12 to 15 mph20 to 24 km/h. 97% chance of rain throughout the day. Humid. NightOvercast, with a low around 70°F21°C. Breezy from the SW at 10 to 12 mph15 to 20 km/h. 65% chance of light rain throughout the night.
	ThursdaySep 10	74°F23°C	63°F17°C	0 in0.1 mm· 5%	58%	Partly Cloudy	WNW 9 mph14 km/h
DayOvercast and warm, with a high of 74°F23°C and morning low of 67°F20°C. Breezy from the W at 9 to 10 mph14 to 16 km/h. NightPartly cloudy, with a low around 63°F17°C. Breezy from the WNW at 9 to 10 mph14 to 17 km/h.
	FridaySep 11	72°F22°C	58°F14°C	0 in0 mm· —	12%	Clear	W 5 mph8 km/h
DayMostly clear and warm, with a high of 72°F22°C and morning low of 59°F15°C. Light wind from the W around 4 mph7 km/h. NightMostly clear, with a low around 58°F14°C. Light wind from the WSW around 6 mph10 km/h.
	SaturdaySep 12	76°F25°C	62°F16°C	0.03 in0.8 mm· 18%	45%	Drizzle	S 7 mph11 km/h
DayPartly cloudy and warm, with a high of 76°F25°C and morning low of 63°F17°C. Breezy from the S at 6 to 7 mph10 to 12 km/h. NightMostly cloudy, with a low around 62°F16°C. Breezy from the S at 7 to 9 mph11 to 14 km/h. 18% chance of drizzle in the evening.
	SundaySep 13	75°F24°C	65°F18°C	0.09 in2.2 mm· 20%	44%	Showers	W 8 mph13 km/h
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 68°F20°C. Breezy from the W at 8 to 9 mph13 to 15 km/h. 20% chance of showers throughout the day. NightPartly cloudy, with a low around 65°F18°C. Breezy from the W at 9 to 10 mph14 to 16 km/h. 16% chance of drizzle throughout the night.
	MondaySep 14	69°F20°C	59°F15°C	0.04 in0.9 mm· 6%	50%	Partly Cloudy	N 7 mph12 km/h
DayMostly cloudy and warm, with a high of 69°F20°C and morning low of 59°F15°C. Breezy from the N at 7 to 8 mph11 to 13 km/h. NightPartly cloudy, with a low around 59°F15°C. Breezy from the N at 8 mph13 km/h.
	TuesdaySep 15	76°F24°C	63°F17°C	0.1 in2.6 mm· 25%	65%	Showers	SSW 11 mph17 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 66°F19°C. Breezy from the SSW at 12 to 13 mph19 to 21 km/h. 22% chance of drizzle throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the S at 10 to 11 mph16 to 18 km/h. 25% chance of showers in the evening.
	WednesdaySep 16	73°F23°C	66°F19°C	0.13 in3.2 mm· 30%	63%	Showers	WSW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 66°F19°C. Breezy from the WSW at 9 mph14 km/h. 18% chance of showers throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the WSW at 8 to 11 mph14 to 17 km/h. 30% chance of showers throughout the night.
	ThursdaySep 17	72°F22°C	64°F18°C	0.11 in2.7 mm· 19%	64%	Drizzle	SE 8 mph12 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 64°F18°C. Breezy from the SE at 8 mph12 km/h. 17% chance of drizzle throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the ESE at 8 to 9 mph12 to 15 km/h. 19% chance of drizzle throughout the night.
	FridaySep 18	72°F22°C	65°F18°C	0.15 in3.8 mm· 26%	60%	Showers	WSW 10 mph17 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 66°F19°C. Breezy from the WSW at 11 mph17 km/h. 26% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F18°C. Breezy from the WSW at 10 mph16 km/h. 23% chance of showers throughout the night.
	SaturdaySep 19	67°F19°C	60°F16°C	0.2 in5.1 mm· 24%	62%	Showers	WNW 10 mph15 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 61°F16°C. Breezy from the WNW at 10 mph16 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 60°F16°C. Breezy from the NW at 9 to 10 mph15 to 16 km/h. 21% chance of showers throughout the night.
	SundaySep 20	65°F18°C	57°F14°C	0.15 in3.8 mm· 20%	57%	Showers	NW 9 mph14 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 57°F14°C. Breezy from the NW at 9 mph15 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the NNW at 9 mph14 km/h. 18% chance of showers throughout the night.
	MondaySep 21	64°F18°C	56°F13°C	0.08 in2 mm· 14%	54%	Drizzle	N 9 mph14 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 56°F13°C. Breezy from the NNW at 9 mph14 km/h. 13% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 56°F13°C. Breezy from the N at 8 to 9 mph13 to 14 km/h. 14% chance of drizzle throughout the night.
	TuesdaySep 22	65°F18°C	56°F13°C	0.15 in3.8 mm· 16%	54%	Showers	NE 9 mph14 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 56°F13°C. Breezy from the ENE at 9 mph14 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 56°F13°C. Breezy from the NE at 8 mph13 km/h. 14% chance of showers 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