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September Weather in Harbour Breton, Canada

Last updated: June 18, 2025

In September in Harbour Breton, Canada, the average temperature hovers around 14°C (57°F), with lows dipping to 4°C (40°F) and highs reaching up to 21°C (70°F). Expect to experience 120 mm (4.7 in) of precipitation over about 12 days, contributing to the region's high average humidity of 88%.

September Temperature in Harbour Breton

In September in Harbour Breton, the average temperature is 14°C (57°F), with a maximum that can reach 21°C (70°F) and a minimum that can drop to 4°C (40°F). It's a great time to explore Harbour Breton, so be sure to pack layers to enjoy the mild days and cooler evenings!

September Weather in Harbour Breton: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Harbour Breton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harbour Breton, September typically has an average temperature of 14°C (57°F), with highs reaching up to 21°C (70°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec272629354049576357484132
Data source: Temperature data for Harbour Breton generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Harbour Breton

In Harbour Breton in September, the precipitation amount is 120 mm (4.7 in) over a period of 12 days.

September Precipitation Trends in Harbour Breton

The chart displays monthly precipitation patterns in Harbour Breton, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Harbour Breton, September typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec118126145128105118124104120125164168
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Harbour Breton

In Harbour Breton in September humidity is 88%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier and giving a sense of stickiness that can drain your energy quickly while exploring.

September Average Humidity in Harbour Breton

This chart illustrates the average monthly humidity levels in Harbour Breton, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Harbour Breton is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%84%85%86%88%91%93%92%88%84%82%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Harbour Breton

In Harbour Breton in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Harbour Breton, you can refer to this Hourly UV Index in Harbour Breton.

Maximum UV Index Levels in Harbour Breton for September

The chart shows the monthly maximum UV Index (UVI) for Harbour Breton in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Harbour Breton typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356810886421
Data source: Harbour Breton September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Harbour Breton Compares to Other Months

Weather in Harbour Breton varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Harbour Breton, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Harbour Breton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (28°F)118 mm (4.6 inches)83%low
February Weather-4°C (26°F)126 mm (5.0 inches)84%moderate
March Weather-2°C (29°F)145 mm (5.7 inches)85%moderate
April Weather2°C (35°F)128 mm (5.0 inches)86%high
May Weather4°C (40°F)105 mm (4.1 inches)88%very high
June Weather10°C (50°F)118 mm (4.6 inches)91%very high
July Weather14°C (58°F)124 mm (4.9 inches)93%very high
August Weather17°C (63°F)104 mm (4.1 inches)92%very high
September Weather14°C (57°F)120 mm (4.7 inches)88%high
October Weather9°C (49°F)124 mm (4.9 inches)84%moderate
November Weather5°C (41°F)164 mm (6.5 inches)82%low
December Weather0°C (32°F)168 mm (6.6 inches)81%low

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