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September Weather in Rimouski, Canada

Last updated: June 18, 2025

In Rimouski, Canada, the average temperature in September hovers around 13°C (55°F), with a minimum of 4°C (39°F) and a maximum reaching 22°C (72°F). Expect 83 mm (3.3 in) of precipitation spread over 11 days, contributing to an average humidity of 85%. Embrace the cozy, yet damp atmosphere this month offers!

September Temperature in Rimouski

In September in Rimouski, the average temperature is 13°C (55°F). Maximums can reach 22°C (72°F), while minimums can drop to as low as 4°C (39°F). This climate makes Rimouski a comfortable destination for travelers looking to enjoy mild weather and pleasant outdoor activities.

September Weather in Rimouski: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Rimouski, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rimouski, September typically has an average temperature of 13°C (55°F), with highs reaching up to 22°C (72°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec151624344555626255463322
Data source: Temperature data for Rimouski 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 Rimouski

In Rimouski in September, the precipitation amount is 83 mm (3.3 in) over the course of 11 days.

September Precipitation Trends in Rimouski

The chart displays monthly precipitation patterns in Rimouski, 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 Rimouski, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec786275104826964618412310886
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rimouski

In Rimouski in September, humidity is 85%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making even short walks feel exhausting and urging travelers to seek shade and refreshment frequently.

September Average Humidity in Rimouski

This chart illustrates the average monthly humidity levels in Rimouski, 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 Rimouski is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec94%93%91%89%82%74%80%83%85%88%89%94%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rimouski

In Rimouski 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 Rimouski, you can refer to this Hourly UV Index in Rimouski.

Maximum UV Index Levels in Rimouski for September

The chart shows the monthly maximum UV Index (UVI) for Rimouski 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 Rimouski typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789886421
Data source: Rimouski 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 Rimouski Compares to Other Months

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

This table compares monthly weather conditions in Rimouski, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (15°F)78 mm (3.1 inches)94%low
February Weather-9°C (16°F)62 mm (2.4 inches)93%moderate
March Weather-4°C (24°F)75 mm (3.0 inches)91%moderate
April Weather1°C (35°F)104 mm (4.1 inches)89%high
May Weather7°C (45°F)82 mm (3.2 inches)82%very high
June Weather13°C (55°F)69 mm (2.7 inches)74%very high
July Weather16°C (62°F)64 mm (2.5 inches)80%very high
August Weather17°C (63°F)61 mm (2.4 inches)83%very high
September Weather13°C (55°F)83 mm (3.3 inches)85%high
October Weather8°C (46°F)123 mm (4.8 inches)88%moderate
November Weather1°C (34°F)108 mm (4.3 inches)89%low
December Weather-5°C (23°F)86 mm (3.4 inches)94%low

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