September Weather in Les Bulles, Belgium

Last updated: August 22, 2025

In Les Bulles, Belgium, the average temperature in September hovers around 14°C (58°F). Expect a minimum of 3°C (38°F) and a maximum soaring up to 33°C (91°F). During this month, precipitation reaches 73 mm (2.9 in) over approximately 10 days, and the average humidity sits at a high 83%. Stay prepared for a varied climate!

September Temperature in Les Bulles

In September in Les Bulles, the average temperature is 14°C (58°F). The maximum can reach 33°C (91°F) and the minimum can be as low as 3°C (38°F). It’s advisable to pack layers for your trip, as temperatures can vary significantly throughout the day.

September Weather in Les Bulles: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Les Bulles, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Les Bulles, September typically has an average temperature of 14°C (58°F), with highs reaching up to 33°C (91°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec353842485463646458514138
Data source: Temperature data for Les Bulles 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 Les Bulles

In Les Bulles in September, the precipitation amount is 73 mm (2.9 in) over the course of 10 days.

September Precipitation Trends in Les Bulles

The chart displays monthly precipitation patterns in Les Bulles, 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 Les Bulles, September typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec92911034782847371739579149
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Les Bulles

In Les Bulles in September, humidity is 83%. With an average temperature of 14°C (58°F), this humidity feels like a thick blanket enveloping you, making exploration feel heavier and sweatier, so be prepared for a slower pace while traveling.

September Average Humidity in Les Bulles

This chart illustrates the average monthly humidity levels in Les Bulles, 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 Les Bulles 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 Les Bulles

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

Maximum UV Index Levels in Les Bulles for September

The chart shows the monthly maximum UV Index (UVI) for Les Bulles 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 Les Bulles typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234689886421
Data source: Les Bulles 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 Les Bulles Compares to Other Months

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

This table compares monthly weather conditions in Les Bulles, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)92 mm (3.6 inches)91%low
February Weather3°C (38°F)91 mm (3.6 inches)90%moderate
March Weather6°C (42°F)103 mm (4.1 inches)88%moderate
April Weather9°C (48°F)47 mm (1.8 inches)84%high
May Weather12°C (55°F)82 mm (3.2 inches)81%very high
June Weather17°C (63°F)84 mm (3.3 inches)82%very high
July Weather18°C (65°F)73 mm (2.9 inches)82%very high
August Weather18°C (65°F)71 mm (2.8 inches)80%very high
September Weather14°C (58°F)73 mm (2.9 inches)83%high
October Weather10°C (51°F)95 mm (3.8 inches)89%moderate
November Weather5°C (42°F)79 mm (3.1 inches)91%low
December Weather3°C (38°F)149 mm (5.9 inches)93%low

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