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September Weather in Port-Cartier, Canada

Last updated: June 18, 2025

In September, the average temperature in Port-Cartier, Canada hovers around 12°C (53°F). Expect a range from a cool 3°C (37°F) to a pleasant 21°C (71°F). This month also sees 145 mm (5.7 in) of precipitation spread over about 15 days, contributing to a notably high average humidity of 82%.

September Temperature in Port-Cartier

In September in Port-Cartier, the average temperature is 12°C (53°F). The maximum can reach 21°C (71°F) and the minimum can be as low as 3°C (37°F). Be sure to pack layers to stay comfortable during your travels.

September Weather in Port-Cartier: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Port-Cartier, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port-Cartier, September typically has an average temperature of 12°C (53°F), with highs reaching up to 21°C (71°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec111222334455636253433119
Data source: Temperature data for Port-Cartier 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 Port-Cartier

In Port-Cartier in September, the precipitation amount is 145 mm (5.7 in) spread over the course of 15 days.

September Precipitation Trends in Port-Cartier

The chart displays monthly precipitation patterns in Port-Cartier, 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 Port-Cartier, September typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec726378107837569105145122117109
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Port-Cartier

In Port-Cartier in September, humidity is 82%. With an average temperature of 12°C (53°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and sticky, as you navigate through the thick air that weighs heavily on your skin.

September Average Humidity in Port-Cartier

This chart illustrates the average monthly humidity levels in Port-Cartier, 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 Port-Cartier is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%91%89%80%69%77%81%82%87%87%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Port-Cartier

In Port-Cartier 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 Port-Cartier, you can refer to this Hourly UV Index in Port-Cartier.

Maximum UV Index Levels in Port-Cartier for September

The chart shows the monthly maximum UV Index (UVI) for Port-Cartier 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 Port-Cartier typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234799776421
Data source: Port-Cartier 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 Port-Cartier Compares to Other Months

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

This table compares monthly weather conditions in Port-Cartier, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-12°C (12°F)72 mm (2.8 inches)93%low
February Weather-11°C (13°F)63 mm (2.5 inches)92%moderate
March Weather-6°C (22°F)78 mm (3.1 inches)91%moderate
April Weather1°C (33°F)107 mm (4.2 inches)89%high
May Weather7°C (44°F)83 mm (3.3 inches)80%very high
June Weather13°C (56°F)75 mm (2.9 inches)69%very high
July Weather17°C (63°F)69 mm (2.7 inches)77%high
August Weather17°C (63°F)105 mm (4.1 inches)81%high
September Weather12°C (53°F)145 mm (5.7 inches)82%high
October Weather6°C (43°F)122 mm (4.8 inches)87%moderate
November Weather-1°C (31°F)117 mm (4.6 inches)87%low
December Weather-7°C (19°F)109 mm (4.3 inches)92%low

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