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September Weather in Hennebont, France

Last updated: August 23, 2025

In Hennebont, France, the average temperature in September is a pleasant 17°C (62°F). You can expect a minimum of 9°C (48°F) and a maximum of 27°C (81°F) during this time. Be prepared for some rain, as 47 mm (1.8 in) of precipitation can fall over 9 days. Additionally, the average humidity hovers around 79%, making for a comfortably mild atmosphere.

September Temperature in Hennebont

In September in Hennebont, the average temperature is 17°C (62°F). The maximum can reach 27°C (81°F), while the minimum can be as low as 9°C (48°F). This mild climate makes Hennebont an ideal destination for outdoor activities and exploration during this time of year.

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

The chart illustrates September temperature patterns in Hennebont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hennebont, September typically has an average temperature of 17°C (62°F), with highs reaching up to 27°C (81°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec464749525762656462575149
Data source: Temperature data for Hennebont 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 Hennebont

In Hennebont in September, the total precipitation amount is 47 mm (1.8 in), which falls over the course of 9 days.

September Precipitation Trends in Hennebont

The chart displays monthly precipitation patterns in Hennebont, 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 Hennebont, September typically receives around 47 mm (1.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec669072466267495247107100133
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hennebont

In Hennebont in September humidity is 79%. With an average temperature of 17°C (62°F), this humidity feels like a warm blanket wrapping around you, making strolling through the streets a bit heavier but still comfortably refreshing for travelers.

September Average Humidity in Hennebont

This chart illustrates the average monthly humidity levels in Hennebont, 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 Hennebont is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%81%82%82%80%77%78%79%82%81%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hennebont

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

Maximum UV Index Levels in Hennebont for September

The chart shows the monthly maximum UV Index (UVI) for Hennebont 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 Hennebont typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986522
Data source: Hennebont 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 Hennebont Compares to Other Months

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

This table compares monthly weather conditions in Hennebont, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)66 mm (2.6 inches)82%low
February Weather8°C (47°F)90 mm (3.5 inches)83%moderate
March Weather9°C (49°F)72 mm (2.8 inches)81%moderate
April Weather11°C (52°F)46 mm (1.8 inches)82%high
May Weather14°C (57°F)62 mm (2.4 inches)82%very high
June Weather17°C (62°F)67 mm (2.6 inches)80%very high
July Weather18°C (66°F)49 mm (1.9 inches)77%very high
August Weather18°C (65°F)52 mm (2.0 inches)78%very high
September Weather17°C (62°F)47 mm (1.8 inches)79%high
October Weather14°C (57°F)107 mm (4.2 inches)82%moderate
November Weather11°C (51°F)100 mm (3.9 inches)81%low
December Weather9°C (49°F)133 mm (5.2 inches)82%low

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