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September Weather in Bru, France

Last updated: August 23, 2025

In Bru, France, the average temperature in September hovers around 15°C (59°F), with a range that can dip to a chilly 3°C (37°F) or rise to a warm 30°C (87°F). Expect about 57 mm (2.3 in) of precipitation spread over 9 days, and stay prepared for a high average humidity of 83%.

September Temperature in Bru

In September in Bru, the average temperature is 15°C (59°F). Maximum temperatures can reach 30°C (87°F), while minimums can drop to as low as 3°C (37°F). It’s advisable to pack a mix of clothing for your travels, as the weather can vary significantly during this time.

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

The chart illustrates September temperature patterns in Bru, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bru, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (87°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec343943495564666659514238
Data source: Temperature data for Bru 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 Bru

In Bru in September, the precipitation amount is 57 mm (2.3 in) over the course of 9 days.

September Precipitation Trends in Bru

The chart displays monthly precipitation patterns in Bru, 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 Bru, September typically receives around 57 mm (2.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec12410311553120987162578586158
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bru

In Bru in September humidity is 83%. With an average temperature of 15°C (59°F), this humidity feels like a cozy, damp embrace that can be quite stifling for traveling, making even short walks feel more exhausting than they should, and prompting a need for frequent breaks in shaded or air-conditioned areas.

September Average Humidity in Bru

This chart illustrates the average monthly humidity levels in Bru, 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 Bru is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%88%84%81%82%82%80%83%89%91%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bru

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

Maximum UV Index Levels in Bru for September

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

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

This table compares monthly weather conditions in Bru, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)124 mm (4.9 inches)91%low
February Weather4°C (39°F)103 mm (4.1 inches)90%moderate
March Weather6°C (43°F)115 mm (4.5 inches)88%moderate
April Weather9°C (49°F)53 mm (2.1 inches)84%high
May Weather13°C (55°F)120 mm (4.7 inches)81%very high
June Weather18°C (64°F)98 mm (3.8 inches)82%very high
July Weather19°C (67°F)71 mm (2.8 inches)82%very high
August Weather19°C (66°F)62 mm (2.4 inches)80%very high
September Weather15°C (59°F)57 mm (2.3 inches)83%high
October Weather11°C (51°F)85 mm (3.3 inches)89%moderate
November Weather5°C (42°F)86 mm (3.4 inches)91%low
December Weather3°C (38°F)158 mm (6.2 inches)93%low

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