Weather in St. Catharines

Ontario, 102 m · continuously updated

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Wind: –
Humidity: –
Rain ahead: –
Sunset: –

Temperature · last 4 and next 28 hours

St. Catharines weather: the next 24 hours

Updated hourly.

St. Catharines 14-day forecast

Two-week trend.

Rain radar

Sun and golden hours

Sunrise –, golden light until –

Sunset –, golden light from –

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Air quality

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European index, measured continuously.

UV index

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Daily maximum — protection advised from 3.

Freezing level

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Snow settles about 300 m below it.

Around St. Catharines

Neighbouring towns, as the crow flies.

Thorold7 km Niagara-on-the-Lake16 km Niagara Falls16 km Chippawa20 km Welland21 km Grimsby26 km Port Colborne30 km Crystal Beach37 km

7-day forecast for St. Catharines

Today (Thursday 15 Oct) in St. Catharines: overcast, 10 to 14 °C, precipitation 0.0 mm (29 %), wind up to 16 km/h. Tomorrow: heavy drizzle, 7 to 20 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	overcast	10 °C	14 °C	0.0 mm	16 km/h
Tomorrow	heavy drizzle	7 °C	20 °C	3.8 mm	28 km/h
Sat 17 Oct	overcast	4 °C	9 °C	0.0 mm	31 km/h
Sun 18 Oct	overcast	5 °C	16 °C	0.0 mm	33 km/h
Mon 19 Oct	overcast	12 °C	18 °C	0.0 mm	26 km/h
Tue 20 Oct	overcast	10 °C	17 °C	0.0 mm	13 km/h
Wed 21 Oct	overcast	8 °C	14 °C	0.0 mm	21 km/h

Forecast updated on 15.10.2026 at 11:44 (Open-Meteo model, elevation 102 m). The live block at the top of the page is refreshed hourly and covers 14 days.

Tomorrow's weather in St. Catharines

Tomorrow, Friday 16 Oct, in St. Catharines: heavy drizzle, from 7 to 20 °C, 3.8 mm of precipitation (probability 70 %), wind up to 28 km/h.

Hour	Weather	Temp.	Precip.	Chance	Wind
00:00	overcast	13 °C	0.0 mm	38 %	3 km/h
03:00	light drizzle	13 °C	0.4 mm	60 %	4 km/h
06:00	overcast	20 °C	0.0 mm	22 %	27 km/h
09:00	overcast	20 °C	0.0 mm	34 %	25 km/h
12:00	overcast	16 °C	0.0 mm	9 %	27 km/h
15:00	light drizzle	12 °C	0.4 mm	3 %	25 km/h
18:00	overcast	10 °C	0.0 mm	10 %	25 km/h
21:00	overcast	8 °C	0.0 mm	2 %	20 km/h

Frequently asked questions

Will it rain tomorrow in St. Catharines?

Yes: 3.8 mm expected, probability 70 %.

How warm will it be tomorrow in St. Catharines?

Between 7 and 20 °C.

The weekend

This weekend in St. Catharines: Saturday overcast, 4 to 9 °C, Sunday overcast, 5 to 16 °C.

Day	Weather	Min	Max	Precip.	Wind
Sat 17 Oct	overcast	4 °C	9 °C	0.0 mm	31 km/h
Sun 18 Oct	overcast	5 °C	16 °C	0.0 mm	33 km/h

Hour by hour

The next 48 hours in St. Catharines, hour by hour: temperature from 4 to 20 °C, 3.8 mm of rain expected.

Hour	Weather	Temp.	Precip.	Chance	Wind
11:00	overcast	10 °C	0.0 mm	0 %	13 km/h
12:00	overcast	12 °C	0.0 mm	0 %	10 km/h
13:00	overcast	13 °C	0.0 mm	0 %	14 km/h
14:00	mostly sunny	13 °C	0.0 mm	0 %	14 km/h
15:00	mostly sunny	14 °C	0.0 mm	0 %	14 km/h
16:00	partly cloudy	14 °C	0.0 mm	0 %	14 km/h
17:00	mostly sunny	14 °C	0.0 mm	0 %	14 km/h
18:00	overcast	13 °C	0.0 mm	1 %	14 km/h
19:00	overcast	12 °C	0.0 mm	2 %	16 km/h
20:00	overcast	11 °C	0.0 mm	7 %	16 km/h
21:00	overcast	11 °C	0.0 mm	5 %	13 km/h
22:00	overcast	11 °C	0.0 mm	12 %	12 km/h
23:00	overcast	12 °C	0.0 mm	29 %	8 km/h
00:00	overcast	13 °C	0.0 mm	38 %	3 km/h
01:00	light drizzle	12 °C	0.4 mm	38 %	3 km/h
02:00	heavy drizzle	12 °C	1.1 mm	37 %	2 km/h
03:00	light drizzle	13 °C	0.4 mm	60 %	4 km/h
04:00	heavy drizzle	15 °C	1.1 mm	70 %	10 km/h
05:00	overcast	19 °C	0.0 mm	45 %	26 km/h
06:00	overcast	20 °C	0.0 mm	22 %	27 km/h
07:00	overcast	20 °C	0.0 mm	21 %	22 km/h
08:00	overcast	20 °C	0.0 mm	23 %	24 km/h
09:00	overcast	20 °C	0.0 mm	34 %	25 km/h
10:00	light drizzle	19 °C	0.4 mm	38 %	25 km/h
11:00	overcast	18 °C	0.0 mm	24 %	23 km/h
12:00	overcast	16 °C	0.0 mm	9 %	27 km/h
13:00	overcast	17 °C	0.0 mm	11 %	28 km/h
14:00	overcast	16 °C	0.0 mm	4 %	26 km/h
15:00	light drizzle	12 °C	0.4 mm	3 %	25 km/h
16:00	overcast	12 °C	0.0 mm	8 %	23 km/h
17:00	overcast	11 °C	0.0 mm	11 %	23 km/h
18:00	overcast	10 °C	0.0 mm	10 %	25 km/h
19:00	overcast	9 °C	0.0 mm	4 %	23 km/h
20:00	overcast	8 °C	0.0 mm	4 %	21 km/h
21:00	overcast	8 °C	0.0 mm	2 %	20 km/h
22:00	overcast	8 °C	0.0 mm	2 %	18 km/h
23:00	overcast	7 °C	0.0 mm	6 %	22 km/h
00:00	overcast	7 °C	0.0 mm	6 %	22 km/h
01:00	overcast	6 °C	0.0 mm	6 %	21 km/h
02:00	overcast	5 °C	0.0 mm	6 %	19 km/h
03:00	sunny	4 °C	0.0 mm	2 %	19 km/h
04:00	overcast	4 °C	0.0 mm	2 %	19 km/h
05:00	overcast	4 °C	0.0 mm	2 %	18 km/h
06:00	overcast	4 °C	0.0 mm	2 %	23 km/h
07:00	overcast	4 °C	0.0 mm	2 %	25 km/h
08:00	overcast	4 °C	0.0 mm	2 %	29 km/h
09:00	sunny	4 °C	0.0 mm	0 %	31 km/h
10:00	sunny	5 °C	0.0 mm	0 %	28 km/h

Location of St. Catharines

St. Catharines lies at 102 m, 102 m below the average of the 187 places we cover in Ontario (204 m). That makes it the 41st lowest of the 187. The main town, Toronto, lies 61 km to the north. The nearest places we cover are Thorold (7 km to the south-east), Niagara-on-the-Lake (16 km to the north-east), Niagara Falls (16 km to the south-east) and Chippawa (20 km to the south-east). With about 136,803 inhabitants according to GeoNames, St. Catharines is the 22nd largest of the 187 places we cover in Ontario.