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 13 rainy days, and a total of 121.4 mm of precipitation.
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Temperatures
Rain 🌧️
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17
Dry days
13
Rainy days
0
Snow days
19°/12°
Temperatures
19 km/h
Avg max wind
81 %
Avg humidity
Cape Breton County in September average weather
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| 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° |
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Temperatures trend during September in Cape Breton County
See the weather trend as well as the moving average line
September weather day by day
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| 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 | |
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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 19° 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?
Significant rainfall exceeding 121.4 mm is expected in Cape Breton County during September, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cape Breton County during September?
The average wind speed in Cape Breton County during September is 19 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 ☀️
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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.
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