Current Conditions

St. Catharines, Ontario

73°F23°C

Cloudy

Wind

ESE 3 mph4 km/h

Humidity

63%

Cloud Cover

95%

As of Tuesday, September 8, 2026 at 3:17 PM EDT

Today's Outlook

Day

Overcast and warm, with a high of 74°F23°C. Light wind from the ESE around 3 mph5 km/h.

Night

Overcast, with a low around 69°F21°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Cloudy	High 74°F23°C	Low 69°F21°C	Precip 0 in0 mm—	Cloud 97%	Wind ESE 4 mph7 km/h	Tuesday: Overcast and warm, with a high of 74°F23°C. Light wind from the ESE around 3 mph5 km/h. Tuesday Night: Overcast, with a low around 69°F21°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h.
Light Rain	High 75°F24°C	Low 70°F21°C	Precip 0.26 in6.7 mm81%	Cloud 88%	Wind SW 12 mph19 km/h	Wednesday: Overcast and warm, with a high of 75°F24°C. Breezy from the SW at 13 to 15 mph20 to 24 km/h. 81% chance of light rain throughout the day. Humid. Wednesday Night: Overcast, with a low around 70°F21°C. Breezy from the SW at 10 to 13 mph17 to 21 km/h. 74% chance of light rain in the evening.
Partly Cloudy	High 72°F22°C	Low 63°F17°C	Precip 0 in0.1 mm2%	Cloud 63%	Wind WNW 9 mph15 km/h	Thursday: Overcast and warm, with a high of 72°F22°C. Breezy from the WNW at 9 to 10 mph15 to 17 km/h. Thursday Night: Partly cloudy, with a low around 63°F17°C. Breezy from the WNW at 9 to 11 mph15 to 18 km/h.
Clear	High 71°F21°C	Low 57°F14°C	Precip 0 in0 mm—	Cloud 9%	Wind W 5 mph8 km/h	Friday: Mostly clear and warm, with a high of 71°F21°C and morning low of 58°F15°C. Light wind from the W around 4 mph7 km/h. Friday Night: Mostly clear, with a low around 57°F14°C. Light wind from the WSW around 6 mph10 km/h.
Drizzle	High 75°F24°C	Low 60°F16°C	Precip 0.04 in0.9 mm16%	Cloud 47%	Wind S 7 mph11 km/h	Saturday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 62°F17°C. Light wind from the S around 6 mph10 km/h. 11% chance of drizzle in the afternoon. Saturday Night: Mostly cloudy, with a low around 60°F16°C. Breezy from the S at 7 to 9 mph11 to 14 km/h. 16% chance of drizzle in the evening.
Showers	High 73°F23°C	Low 65°F18°C	Precip 0.16 in4 mm32%	Cloud 49%	Wind W 9 mph14 km/h	Sunday: Mostly cloudy and warm, with a high of 73°F23°C and morning low of 68°F20°C. Breezy from the W at 8 to 9 mph13 to 15 km/h. 31% 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 mph15 to 16 km/h. 32% chance of showers throughout the night.
Partly Cloudy	High 69°F20°C	Low 60°F15°C	Precip 0.02 in0.6 mm7%	Cloud 45%	Wind N 8 mph12 km/h	Monday: Mostly cloudy and warm, with a high of 69°F20°C and morning low of 60°F15°C. Breezy from the N at 7 to 9 mph12 to 14 km/h. Monday Night: Partly cloudy, with a low around 60°F15°C. Breezy from the NNW at 8 to 9 mph13 to 15 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 8	74°F23°C	69°F21°C	0 in0 mm· —	97%	Cloudy	ESE 4 mph7 km/h
DayOvercast and warm, with a high of 74°F23°C. Light wind from the ESE around 3 mph5 km/h. NightOvercast, with a low around 69°F21°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h.
	WednesdaySep 9	75°F24°C	70°F21°C	0.26 in6.7 mm· 81%	88%	Light Rain	SW 12 mph19 km/h
DayOvercast and warm, with a high of 75°F24°C. Breezy from the SW at 13 to 15 mph20 to 24 km/h. 81% chance of light rain throughout the day. Humid. NightOvercast, with a low around 70°F21°C. Breezy from the SW at 10 to 13 mph17 to 21 km/h. 74% chance of light rain in the evening.
	ThursdaySep 10	72°F22°C	63°F17°C	0 in0.1 mm· 2%	63%	Partly Cloudy	WNW 9 mph15 km/h
DayOvercast and warm, with a high of 72°F22°C. Breezy from the WNW at 9 to 10 mph15 to 17 km/h. NightPartly cloudy, with a low around 63°F17°C. Breezy from the WNW at 9 to 11 mph15 to 18 km/h.
	FridaySep 11	71°F21°C	57°F14°C	0 in0 mm· —	9%	Clear	W 5 mph8 km/h
DayMostly clear and warm, with a high of 71°F21°C and morning low of 58°F15°C. Light wind from the W around 4 mph7 km/h. NightMostly clear, with a low around 57°F14°C. Light wind from the WSW around 6 mph10 km/h.
	SaturdaySep 12	75°F24°C	60°F16°C	0.04 in0.9 mm· 16%	47%	Drizzle	S 7 mph11 km/h
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 62°F17°C. Light wind from the S around 6 mph10 km/h. 11% chance of drizzle in the afternoon. NightMostly cloudy, with a low around 60°F16°C. Breezy from the S at 7 to 9 mph11 to 14 km/h. 16% chance of drizzle in the evening.
	SundaySep 13	73°F23°C	65°F18°C	0.16 in4 mm· 32%	49%	Showers	W 9 mph14 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 68°F20°C. Breezy from the W at 8 to 9 mph13 to 15 km/h. 31% chance of showers throughout the day. NightPartly cloudy, with a low around 65°F18°C. Breezy from the W at 9 to 10 mph15 to 16 km/h. 32% chance of showers throughout the night.
	MondaySep 14	69°F20°C	60°F15°C	0.02 in0.6 mm· 7%	45%	Partly Cloudy	N 8 mph12 km/h
DayMostly cloudy and warm, with a high of 69°F20°C and morning low of 60°F15°C. Breezy from the N at 7 to 9 mph12 to 14 km/h. NightPartly cloudy, with a low around 60°F15°C. Breezy from the NNW at 8 to 9 mph13 to 15 km/h.
	TuesdaySep 15	75°F24°C	64°F18°C	0.08 in2.1 mm· 26%	61%	Showers	SSW 11 mph18 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the SSW at 12 mph19 km/h. 16% chance of drizzle throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the S at 10 to 11 mph16 to 17 km/h. 26% chance of showers throughout the night.
	WednesdaySep 16	72°F22°C	66°F19°C	0.15 in3.7 mm· 28%	63%	Showers	SW 8 mph13 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 8 to 9 mph13 to 14 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the SW at 8 to 10 mph14 to 16 km/h. 28% chance of showers throughout the night.
	ThursdaySep 17	72°F22°C	64°F18°C	0.15 in3.8 mm· 21%	56%	Showers	S 8 mph13 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 65°F18°C. Breezy from the S at 8 mph13 km/h. 19% chance of showers throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the S at 8 to 9 mph13 to 14 km/h. 21% chance of drizzle throughout the night.
	FridaySep 18	71°F22°C	65°F18°C	0.21 in5.4 mm· 30%	60%	Showers	WSW 10 mph16 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 66°F19°C. Breezy from the WSW at 10 to 11 mph17 to 17 km/h. 30% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F18°C. Breezy from the WSW at 10 mph16 km/h. 27% chance of showers throughout the night.
	SaturdaySep 19	68°F20°C	62°F17°C	0.12 in3.1 mm· 19%	59%	Showers	W 10 mph16 km/h
DayMostly cloudy and mild, with a high of 68°F20°C and morning low of 62°F17°C. Breezy from the W at 10 mph16 km/h. 14% chance of drizzle throughout the day. NightMostly cloudy, with a low around 62°F17°C. Breezy from the W at 10 mph16 km/h. 19% chance of showers throughout the night.
	SundaySep 20	65°F18°C	59°F15°C	0.18 in4.5 mm· 23%	63%	Showers	WNW 10 mph16 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 59°F15°C. Breezy from the WNW at 10 mph16 km/h. 23% chance of showers throughout the day. NightMostly cloudy, with a low around 59°F15°C. Breezy from the NW at 10 mph16 km/h. 20% chance of showers throughout the night.
	MondaySep 21	64°F18°C	57°F14°C	0.14 in3.5 mm· 23%	58%	Showers	NNW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 57°F14°C. Breezy from the NNW at 9 to 10 mph15 to 15 km/h. 19% chance of showers throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the N at 9 to 10 mph15 to 16 km/h. 23% chance of showers throughout the night.
	TuesdaySep 22	64°F18°C	56°F13°C	0.11 in2.9 mm· 17%	58%	Drizzle	E 9 mph15 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 56°F13°C. Breezy from the SSW at 9 mph15 km/h. 15% chance of drizzle throughout the day. NightMostly cloudy, with a low around 56°F13°C. Breezy from the ENE at 9 mph15 km/h. 17% chance of drizzle throughout the night.

Nearby Cities

Thorold4 mi7 km Niagara-on-the-Lake10 mi16 km Niagara Falls10 mi16 km Welland13 mi21 km Grimsby16 mi26 km Port Colborne19 mi30 km

About This Forecast

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Coordinates: 43.1713°N, 79.2427°W·Elevation: 102m·Timezone: America/Toronto·Population: 136,803