September

January February March April May June July August

September

October November December

Saint John in September average weather

Move between months or click on a day

August

October

You can click on date

Access Saint John weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.

Got it

Temperatures trend during September in Saint John

See the weather trend as well as the moving average line

September weather day by day

Click on a date for more information

August October

Date	Weather	Temperatures	Rain	UV
1 Sept.	Sunny	19° /10°	10.8 mm	5
2 Sept.	Overcast	20° /11°	0.8 mm	5
3 Sept.	Overcast	19° /10°	0 mm	5
4 Sept.	Fog	20° /11°	0 mm	5
5 Sept.	Fog	23° /13°	0 mm	6
6 Sept.	Overcast	22° /12°	0 mm	5
7 Sept.	Mist	20° /14°	0.6 mm	5
8 Sept.	Light rain shower	18° /11°	4.3 mm	5
9 Sept.	Fog	17° /10°	3.5 mm	5
10 Sept.	Light rain shower	19° /11°	7.2 mm	4
11 Sept.	Moderate or heavy rain shower	18° /10°	12.1 mm	5
12 Sept.	Fog	19° /12°	0 mm	5
13 Sept.	Fog	19° /12°	3.3 mm	5
14 Sept.	Heavy rain	19° /12°	5.4 mm	5
15 Sept.	Overcast	19° /8°	0 mm	5
16 Sept.	Light rain shower	20° /12°	33.8 mm	5
17 Sept.	Overcast	19° /12°	4.9 mm	5
18 Sept.	Light drizzle	16° /11°	1.8 mm	4
19 Sept.	Moderate rain	18° /12°	3.8 mm	4
20 Sept.	Patchy rain possible	17° /13°	0 mm	4
21 Sept.	Mist	18° /10°	0 mm	4
22 Sept.	Sunny	16° /8°	0 mm	5
23 Sept.	Overcast	15° /9°	0 mm	4
24 Sept.	Mist	18° /10°	0 mm	5
25 Sept.	Patchy rain possible	17° /10°	0.1 mm	4
26 Sept.	Sunny	16° /7°	4.9 mm	4
27 Sept.	Sunny	18° /9°	37.1 mm	5
28 Sept.	Mist	18° /8°	0 mm	5
29 Sept.	Fog	17° /9°	0 mm	4
30 Sept.	Mist	19° /9°	0 mm	4
Next

Important Notice

Our weather forecast for Saint John 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 Saint John forecast closer to your planned date for the most up-to-date weather information.

Saint John in September - FAQ

What are the expected maximum and minimum temperatures in Saint John during September?

Enjoy moderate daytime temperatures of up to 19° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Saint John during September?

Significant rainfall exceeding 151.1 mm is expected in Saint John during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Saint John during September?

The average wind speed in Saint John during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Saint John

Explore the daily rainfall trends and prepare for Saint Johns September weather 💧

UV exposure in Saint John during September

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

Quick links

You are here

Where is Saint John?

Get accurate weather forecasts for Saint John, located at latitude 45.271 and longitude -66.056. Stay updated with localized weather information tailored for Saint John.

Found a mistake?

We appreciate your attention to details. Tell us here.

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