Current Conditions

St. Catharines, Ontario

73°F23°C

Clear

Wind

SSW 7 mph12 km/h

Humidity

46%

Cloud Cover

As of Thursday, July 23, 2026 at 6:28 PM EDT

Today's Outlook

Night

Mostly clear, with a low around 66°F19°C. Breezy from the SSW at 8 to 9 mph14 to 15 km/h.

7-Day Forecast

Day	Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
ThursdayJul 23	Clear	High 73°F23°C	Low 66°F19°C	Precip 0 in0 mm—	Cloud 2%	Wind SW 8 mph12 km/h	Thursday: Mostly clear and warm, with a high of 73°F23°C. Breezy from the SW at 7 mph11 km/h. Dry air. Thursday Night: Mostly clear, with a low around 66°F19°C. Breezy from the SSW at 8 to 9 mph14 to 15 km/h.
FridayJul 24	Clear	High 76°F25°C	Low 61°F16°C	Precip 0 in0 mm—	Cloud 9%	Wind ESE 5 mph7 km/h	Friday: Mostly clear and warm, with a high of 76°F25°C and morning low of 65°F18°C. Light wind from the ESE around 3 mph5 km/h. Friday Night: Mostly clear, with a low around 61°F16°C. Breezy from the ESE at 6 to 8 mph10 to 13 km/h.
SaturdayJul 25	Drizzle	High 78°F25°C	Low 66°F19°C	Precip 0.01 in0.3 mm10%	Cloud 37%	Wind S 6 mph10 km/h	Saturday: Mostly cloudy and warm, with a high of 78°F25°C and morning low of 69°F21°C. Light wind from the S around 6 mph9 km/h. Saturday Night: Mostly clear, with a low around 66°F19°C. Light wind from the S around 6 mph10 km/h. 10% chance of drizzle in the evening.
SundayJul 26	Drizzle	High 79°F26°C	Low 68°F20°C	Precip 0.05 in1.2 mm32%	Cloud 32%	Wind SW 7 mph11 km/h	Sunday: Partly cloudy and warm, with a high of 79°F26°C and morning low of 70°F21°C. Breezy from the SW at 7 to 9 mph11 to 15 km/h. 31% chance of drizzle in the afternoon. Humid. Sunday Night: Partly cloudy, with a low around 68°F20°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h. 32% chance of drizzle in the evening.
MondayJul 27	Showers	High 78°F25°C	Low 69°F20°C	Precip 0.2 in5 mm38%	Cloud 62%	Wind SW 6 mph9 km/h	Monday: Mostly cloudy and warm, with a high of 78°F25°C and morning low of 70°F21°C. Breezy from the SW at 6 to 7 mph9 to 11 km/h. 38% chance of showers throughout the day. Humid. Monday Night: Mostly cloudy, with a low around 69°F20°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. 32% chance of showers throughout the night.
TuesdayJul 28	Rain	High 75°F24°C	Low 70°F21°C	Precip 0.5 in12.8 mm59%	Cloud 61%	Wind WNW 8 mph13 km/h	Tuesday: Mostly cloudy and warm, with a high of 75°F24°C. Breezy from the NW at 8 mph12 km/h. 59% chance of rain throughout the day. Humid. Tuesday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the WNW at 8 to 10 mph13 to 16 km/h. 53% chance of rain throughout the night.
WednesdayJul 29	Drizzle	High 75°F24°C	Low 67°F19°C	Precip 0.07 in1.9 mm20%	Cloud 41%	Wind NNW 9 mph15 km/h	Wednesday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 67°F20°C. Breezy from the NNW at 9 to 10 mph15 to 17 km/h. 20% chance of drizzle throughout the day. Wednesday Night: Partly cloudy, with a low around 67°F19°C. Breezy from the NNW at 9 to 10 mph15 to 17 km/h. 19% chance of drizzle throughout the night.

15-Day Forecast

	Day	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Condition	Wind (mph)
	ThursdayJul 23	73°F23°C	66°F19°C	0 in0 mm· —	2%	Clear	SW 8 mph12 km/h
DayMostly clear and warm, with a high of 73°F23°C. Breezy from the SW at 7 mph11 km/h. Dry air. NightMostly clear, with a low around 66°F19°C. Breezy from the SSW at 8 to 9 mph14 to 15 km/h.
	FridayJul 24	76°F25°C	61°F16°C	0 in0 mm· —	9%	Clear	ESE 5 mph7 km/h
DayMostly clear and warm, with a high of 76°F25°C and morning low of 65°F18°C. Light wind from the ESE around 3 mph5 km/h. NightMostly clear, with a low around 61°F16°C. Breezy from the ESE at 6 to 8 mph10 to 13 km/h.
	SaturdayJul 25	78°F25°C	66°F19°C	0.01 in0.3 mm· 10%	37%	Drizzle	S 6 mph10 km/h
DayMostly cloudy and warm, with a high of 78°F25°C and morning low of 69°F21°C. Light wind from the S around 6 mph9 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the S around 6 mph10 km/h. 10% chance of drizzle in the evening.
	SundayJul 26	79°F26°C	68°F20°C	0.05 in1.2 mm· 32%	32%	Drizzle	SW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 70°F21°C. Breezy from the SW at 7 to 9 mph11 to 15 km/h. 31% chance of drizzle in the afternoon. Humid. NightPartly cloudy, with a low around 68°F20°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h. 32% chance of drizzle in the evening.
	MondayJul 27	78°F25°C	69°F20°C	0.2 in5 mm· 38%	62%	Showers	SW 6 mph9 km/h
DayMostly cloudy and warm, with a high of 78°F25°C and morning low of 70°F21°C. Breezy from the SW at 6 to 7 mph9 to 11 km/h. 38% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 69°F20°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. 32% chance of showers throughout the night.
	TuesdayJul 28	75°F24°C	70°F21°C	0.5 in12.8 mm· 59%	61%	Rain	WNW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 75°F24°C. Breezy from the NW at 8 mph12 km/h. 59% chance of rain throughout the day. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the WNW at 8 to 10 mph13 to 16 km/h. 53% chance of rain throughout the night.
	WednesdayJul 29	75°F24°C	67°F19°C	0.07 in1.9 mm· 20%	41%	Drizzle	NNW 9 mph15 km/h
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 67°F20°C. Breezy from the NNW at 9 to 10 mph15 to 17 km/h. 20% chance of drizzle throughout the day. NightPartly cloudy, with a low around 67°F19°C. Breezy from the NNW at 9 to 10 mph15 to 17 km/h. 19% chance of drizzle throughout the night.
	ThursdayJul 30	77°F25°C	65°F18°C	0.04 in1 mm· 10%	25%	Drizzle	NW 7 mph12 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 67°F19°C. Breezy from the NW at 7 to 8 mph11 to 12 km/h. 10% chance of drizzle throughout the day. NightMostly clear, with a low around 65°F18°C. Breezy from the NW at 7 to 9 mph12 to 14 km/h.
	FridayJul 31	79°F26°C	67°F19°C	0.06 in1.4 mm· 12%	38%	Drizzle	SW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 69°F20°C. Breezy from the SW at 7 to 8 mph11 to 14 km/h. 12% chance of drizzle in the afternoon. NightPartly cloudy, with a low around 67°F19°C. Breezy from the WSW at 7 to 8 mph11 to 13 km/h. 11% chance of drizzle throughout the night.
	SaturdayAug 1	78°F26°C	69°F21°C	0.11 in2.7 mm· 22%	49%	Drizzle	WSW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 70°F21°C. Breezy from the WSW at 8 mph12 km/h. 22% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 69°F21°C. Breezy from the WSW at 7 to 8 mph12 to 12 km/h. 19% chance of drizzle throughout the night.
	SundayAug 2	78°F25°C	68°F20°C	0.09 in2.4 mm· 21%	44%	Showers	WSW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 78°F25°C and morning low of 69°F21°C. Breezy from the WSW at 7 mph11 km/h. 21% chance of showers throughout the day. NightPartly cloudy, with a low around 68°F20°C. Breezy from the WSW at 7 mph11 km/h. 18% chance of drizzle throughout the night.
	MondayAug 3	79°F26°C	68°F20°C	0.07 in1.7 mm· 14%	45%	Drizzle	SW 7 mph12 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 70°F21°C. Breezy from the SW at 8 mph12 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 68°F20°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the night.
	TuesdayAug 4	79°F26°C	70°F21°C	0.14 in3.6 mm· 27%	56%	Showers	SW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 71°F22°C. Breezy from the SW at 10 mph15 km/h. 24% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 27% chance of showers throughout the night.
	WednesdayAug 5	78°F25°C	69°F20°C	0.11 in2.9 mm· 21%	51%	Showers	WSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 78°F25°C and morning low of 70°F21°C. Breezy from the WSW at 8 to 9 mph14 to 15 km/h. 19% chance of drizzle throughout the day. NightMostly cloudy, with a low around 69°F20°C. Breezy from the WSW at 8 mph13 km/h. 21% chance of showers throughout the night.
	ThursdayAug 6	76°F25°C	68°F20°C	0.12 in3.1 mm· 20%	49%	Showers	WSW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 69°F20°C. Breezy from the WSW at 7 to 8 mph12 to 12 km/h. 20% chance of showers throughout the day. NightPartly cloudy, with a low around 68°F20°C. Breezy from the WSW at 7 to 8 mph11 to 12 km/h. 16% 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

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