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September Weather in Bourbriac, France

Last updated: August 23, 2025

In Bourbriac, France, the average temperature in September hovers around 15°C (59°F), making it a comfortable time to explore. However, be prepared for fluctuations, as temperatures can dip to a minimum of 4°C (40°F) and soar to a maximum of 29°C (85°F). Expect a gentle precipitation of 48 mm (1.9 in) over approximately 10 days, and don't forget your umbrella! The average humidity is about 76%, adding a touch of mugginess to the air.

September Temperature in Bourbriac

In September in Bourbriac, the average temperature is 15°C (59°F), with maximums reaching up to 29°C (85°F) and minimums dropping as low as 4°C (40°F). This diverse weather makes it a perfect time for travelers to explore the outdoor attractions while packing layers for cooler evenings.

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

The chart illustrates September temperature patterns in Bourbriac, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bourbriac, September typically has an average temperature of 15°C (59°F), with highs reaching up to 29°C (85°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec434546505460636259544845
Data source: Temperature data for Bourbriac 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 Bourbriac

In Bourbriac in September, the precipitation amount is 48 mm (1.9 in) spread over a period of 10 days.

September Precipitation Trends in Bourbriac

The chart displays monthly precipitation patterns in Bourbriac, 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 Bourbriac, September typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec597470518111453494810774108
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bourbriac

In Bourbriac in September humidity is 76%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities less enjoyable and often leading to a quick sense of fatigue while traveling.

September Average Humidity in Bourbriac

This chart illustrates the average monthly humidity levels in Bourbriac, 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 Bourbriac 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 Bourbriac

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

Maximum UV Index Levels in Bourbriac for September

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

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

This table compares monthly weather conditions in Bourbriac, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)59 mm (2.3 inches)89%low
February Weather7°C (45°F)74 mm (2.9 inches)88%moderate
March Weather8°C (47°F)70 mm (2.8 inches)85%moderate
April Weather10°C (50°F)51 mm (2.0 inches)84%high
May Weather12°C (55°F)81 mm (3.2 inches)81%very high
June Weather16°C (60°F)114 mm (4.5 inches)77%very high
July Weather17°C (63°F)53 mm (2.1 inches)63%very high
August Weather17°C (62°F)49 mm (1.9 inches)71%very high
September Weather15°C (59°F)48 mm (1.9 inches)76%high
October Weather12°C (54°F)107 mm (4.2 inches)89%moderate
November Weather9°C (48°F)74 mm (2.9 inches)90%low
December Weather7°C (46°F)108 mm (4.2 inches)90%low

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