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St. Catharines in September average weather

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Temperatures trend during September in St. Catharines

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September weather day by day

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August October

Date	Weather	Temperatures	Rain	UV
1 Sept.	Mist	23° /15°	0.4 mm	5
2 Sept.	Mist	22° /14°	0.2 mm	6
3 Sept.	Thundery outbreaks possible	25° /16°	0 mm	6
4 Sept.	Partly cloudy	27° /17°	0 mm	7
5 Sept.	Partly cloudy	29° /18°	0 mm	8
6 Sept.	Thundery outbreaks possible	29° /18°	0.7 mm	7
7 Sept.	Light rain shower	22° /15°	4.8 mm	5
8 Sept.	Mist	21° /13°	0.1 mm	5
9 Sept.	Overcast	21° /15°	0.4 mm	5
10 Sept.	Light rain shower	20° /16°	0.5 mm	5
11 Sept.	Overcast	23° /15°	0 mm	5
12 Sept.	Mist	24° /16°	0.6 mm	6
13 Sept.	Overcast	20° /14°	0 mm	5
14 Sept.	Partly cloudy	22° /14°	0 mm	6
15 Sept.	Partly cloudy	23° /14°	0 mm	6
16 Sept.	Mist	23° /14°	0 mm	6
17 Sept.	Mist	21° /14°	0.1 mm	5
18 Sept.	Patchy rain possible	21° /15°	0.3 mm	5
19 Sept.	Overcast	22° /13°	0 mm	5
20 Sept.	Sunny	22° /13°	0 mm	6
21 Sept.	Mist	25° /14°	1.6 mm	6
22 Sept.	Partly cloudy	24° /13°	0 mm	6
23 Sept.	Overcast	21° /14°	6.5 mm	5
24 Sept.	Overcast	21° /13°	0 mm	5
25 Sept.	Partly cloudy	23° /16°	4.2 mm	6
26 Sept.	Mist	23° /14°	0 mm	5
27 Sept.	Overcast	19° /13°	0 mm	5
28 Sept.	Patchy rain possible	19° /13°	1.9 mm	5
29 Sept.	Overcast	21° /16°	0 mm	5
30 Sept.	Mist	20° /14°	0 mm	5
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Important Notice

Our weather forecast for St. Catharines in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the St. Catharines forecast closer to your planned date for the most up-to-date weather information.

St. Catharines in September - FAQ

What are the expected maximum and minimum temperatures in St. Catharines during September?

Enjoy moderate daytime temperatures of up to 23° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in St. Catharines during September?

Expect minimal rainfall in St. Catharines during September, with a total of 10.8 mm over approximately 7 days. This minimal precipitation is unlikely to significantly impact plans.

What are the typical wind conditions in St. Catharines during September?

The average wind speed in St. Catharines during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in St. Catharines

Explore the daily rainfall trends and prepare for St. Cathariness September weather 💧

UV exposure in St. Catharines during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Where is St. Catharines?

Get accurate weather forecasts for St. Catharines, located at latitude 43.171 and longitude -79.243. Stay updated with localized weather information tailored for St. Catharines.

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Mon.	Tue.	Wed.	Thu.	Fri.	Sat.	Sun.
1 23°	2 22°	3 25°	4 27°	5 29°	6 29°	7 22°
8 21°	9 21°	10 20°	11 23°	12 24°	13 20°	14 22°
15 23°	16 23°	17 21°	18 21°	19 22°	20 22°	21 25°
22 24°	23 21°	24 21°	25 23°	26 23°	27 19°	28 19°
29 21°	30 20°