Cape Breton County (Sydney)
September
Weather in Cape Breton County for September 2025
Your guide to Cape Breton County weather in September - trends and predictions
In general, the average temperature in Cape Breton County at the beginning of September is 21.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17 °C by the end of September.
The climate of Cape Breton County in September is notably wet, with an average of 11 rainy days.
- New! Chat with our AI weatherman - it’s amazing and free.
19
Dry days
11
Rainy days
0
Snow days
20°/12°
Temperatures
18 km/h
Avg max wind
84 %
Avg humidity
Cape Breton County in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2  22° | 3 21° | 4  22° | 5  21° | 6  22° | 7 20° |
| 8 24° | 9 23° | 10 22° | 11 18° | 12 19° | 13 22° | 14 19° |
| 15  20° | 16 22° | 17 22° | 18 24° | 19  21° | 20 18° | 21 14° |
| 22 14° | 23 17° | 24 18° | 25 15° | 26  16° | 27 16° | 28 18° |
| 29 18° | 30 18° |
You can click on date
Access Cape Breton County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Cape Breton County
See the weather trend as well as the moving average line
September weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Cloudy | 21° /12° | 0 mm | 5 | |
| 2 Sept. | Partly cloudy | 22° /11° | 2.3 mm | 6 | |
| 3 Sept. | Partly cloudy | 21° /11° | 0.5 mm | 5 | |
| 4 Sept. | Fog | 22° /11° | 0 mm | 5 | |
| 5 Sept. | Light drizzle | 21° /12° | 0.3 mm | 5 | |
| 6 Sept. | Light rain shower | 22° /15° | 3.5 mm | 5 | |
| 7 Sept. | Light rain shower | 20° /16° | 15 mm | 5 | |
| 8 Sept. | Fog | 24° /17° | 1.2 mm | 6 | |
| 9 Sept. | Fog | 23° /15° | 1.8 mm | 6 | |
| 10 Sept. | Mist | 22° /13° | 1.2 mm | 5 | |
| 11 Sept. | Light rain shower | 18° /12° | 2.5 mm | 4 | |
| 12 Sept. | Fog | 19° /12° | 0 mm | 4 | |
| 13 Sept. | Fog | 22° /13° | 0 mm | 5 | |
| 14 Sept. | Light rain | 19° /13° | 0.7 mm | 5 | |
| 15 Sept. | Moderate rain at times | 20° /11° | 3.8 mm | 5 | |
| 16 Sept. | Moderate or heavy rain shower | 22° /13° | 5.8 mm | 5 | |
| 17 Sept. | Light rain | 22° /16° | 1.6 mm | 5 | |
| 18 Sept. | Mist | 24° /14° | 0 mm | 6 | |
| 19 Sept. | Heavy rain | 21° /13° | 21.5 mm | 5 | |
| 20 Sept. | Patchy rain possible | 18° /13° | 0.1 mm | 4 | |
| 21 Sept. | Light drizzle | 14° /11° | 0.5 mm | 3 | |
| 22 Sept. | Patchy rain possible | 14° /9° | 0.1 mm | 3 | |
| 23 Sept. | Cloudy | 17° /9° | 0 mm | 4 | |
| 24 Sept. | Cloudy | 18° /10° | 0 mm | 5 | |
| 25 Sept. | Light rain shower | 15° /10° | 0.3 mm | 4 | |
| 26 Sept. | Overcast | 16° /8° | 0 mm | 4 | |
| 27 Sept. | Overcast | 16° /9° | 13 mm | 4 | |
| 28 Sept. | Fog | 18° /10° | 45.7 mm | 5 | |
| 29 Sept. | Mist | 18° /8° | 0 mm | 4 | |
| 30 Sept. | Mist | 18° /8° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Cape Breton County 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 Cape Breton County forecast closer to your planned date for the most up-to-date weather information.
Cape Breton County in September - FAQ
What are the expected maximum and minimum temperatures in Cape Breton County during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cape Breton County during September?
Moderate rainfall is anticipated in Cape Breton County during September, with a total of 82.6 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Cape Breton County during September?
The average wind speed in Cape Breton County during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Cape Breton County
Explore the daily rainfall trends and prepare for Cape Breton Countys September weather 💧
UV exposure in Cape Breton County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Cape Breton County
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Cape Breton County?Get accurate weather forecasts for Cape Breton County, located at latitude 46.135 and longitude -60.183. Stay updated with localized weather information tailored for Cape Breton County.
Found a mistake?
We appreciate your attention to details. Tell us here.