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September Weather in Saint-Quay-Portrieux, France

Last updated: August 23, 2025

In September, the average temperature in Saint-Quay-Portrieux, France is a pleasant 17°C (63°F). You can expect the minimum temperature to dip to around 12°C (53°F), while the maximum can reach a comfortable 24°C (75°F). With precipitation totaling 70 mm (2.7 in) over 11 days, it's wise to be prepared for some rain. The average humidity level sits at a notable 76%, adding to the overall atmosphere of the season.

September Temperature in Saint-Quay-Portrieux

In September in Saint-Quay-Portrieux, the average temperature is 17°C (63°F). The maximum can reach 24°C (75°F) and the minimum can be as low as 12°C (53°F). This comfortable weather makes it an ideal time for outdoor activities and sightseeing.

September Weather in Saint-Quay-Portrieux: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint-Quay-Portrieux, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint-Quay-Portrieux, September typically has an average temperature of 17°C (63°F), with highs reaching up to 24°C (75°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec474748505459636462585350
Data source: Temperature data for Saint-Quay-Portrieux 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 Saint-Quay-Portrieux

In Saint-Quay-Portrieux in September, the precipitation amount is 70 mm (2.7 in) spread over 11 days.

September Precipitation Trends in Saint-Quay-Portrieux

The chart displays monthly precipitation patterns in Saint-Quay-Portrieux, 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 Saint-Quay-Portrieux, September typically receives around 70 mm (2.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec828764396482445070144102143
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint-Quay-Portrieux

In Saint-Quay-Portrieux in September humidity is 76%. With an average temperature of 17°C (63°F), this humidity feels like traveling through a warm, enveloping blanket, making every outdoor adventure feel sticky and heavy, yet pleasantly refreshing when you find a cool breeze.

September Average Humidity in Saint-Quay-Portrieux

This chart illustrates the average monthly humidity levels in Saint-Quay-Portrieux, 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 Saint-Quay-Portrieux is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%85%84%81%77%63%71%76%89%90%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint-Quay-Portrieux

In Saint-Quay-Portrieux 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 Saint-Quay-Portrieux, you can refer to this Hourly UV Index in Saint-Quay-Portrieux.

Maximum UV Index Levels in Saint-Quay-Portrieux for September

The chart shows the monthly maximum UV Index (UVI) for Saint-Quay-Portrieux 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 Saint-Quay-Portrieux typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Saint-Quay-Portrieux 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 Saint-Quay-Portrieux Compares to Other Months

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

This table compares monthly weather conditions in Saint-Quay-Portrieux, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)82 mm (3.2 inches)89%low
February Weather8°C (48°F)87 mm (3.4 inches)88%moderate
March Weather9°C (49°F)64 mm (2.5 inches)85%moderate
April Weather10°C (51°F)39 mm (1.5 inches)84%high
May Weather12°C (55°F)64 mm (2.5 inches)81%very high
June Weather15°C (59°F)82 mm (3.2 inches)77%very high
July Weather17°C (63°F)44 mm (1.7 inches)63%very high
August Weather18°C (64°F)50 mm (2.0 inches)71%very high
September Weather17°C (63°F)70 mm (2.7 inches)76%high
October Weather15°C (59°F)144 mm (5.6 inches)89%moderate
November Weather12°C (53°F)102 mm (4.0 inches)90%low
December Weather10°C (50°F)143 mm (5.6 inches)90%low

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