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September Weather in Biwer, Luxembourg

Last updated: August 23, 2025

In Biwer, Luxembourg, the average temperature in September hovers around 15°C (59°F), with a minimum of 3°C (38°F) and a maximum reaching 32°C (90°F). Expect about 58 mm (2.3 in) of precipitation spread over 9 days, while the air maintains an average humidity of 83%. Get ready for a mix of mild days and occasional showers!

September Temperature in Biwer

In September in Biwer, the average temperature is 15°C (59°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as 3°C (38°F). Pack accordingly to enjoy a comfortable stay, as the weather can vary significantly throughout the month.

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

The chart illustrates September temperature patterns in Biwer, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Biwer, September typically has an average temperature of 15°C (59°F), with highs reaching up to 32°C (90°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec363943495564666558514239
Data source: Temperature data for Biwer 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 Biwer

In Biwer in September, the precipitation amount is 58 mm (2.3 in) spread over 9 days.

September Precipitation Trends in Biwer

The chart displays monthly precipitation patterns in Biwer, 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 Biwer, September typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec6770764069697364587465111
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Biwer

In Biwer 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 Biwer

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

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

Maximum UV Index Levels in Biwer for September

The chart shows the monthly maximum UV Index (UVI) for Biwer 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 Biwer typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234689876421
Data source: Biwer 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 Biwer Compares to Other Months

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

This table compares monthly weather conditions in Biwer, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)67 mm (2.6 inches)91%low
February Weather4°C (39°F)70 mm (2.7 inches)90%moderate
March Weather6°C (43°F)76 mm (3.0 inches)88%moderate
April Weather9°C (49°F)40 mm (1.6 inches)84%high
May Weather13°C (56°F)69 mm (2.7 inches)81%very high
June Weather18°C (64°F)69 mm (2.7 inches)82%very high
July Weather19°C (66°F)72 mm (2.9 inches)82%very high
August Weather19°C (66°F)64 mm (2.5 inches)80%high
September Weather15°C (59°F)58 mm (2.3 inches)83%high
October Weather11°C (51°F)74 mm (2.9 inches)89%moderate
November Weather5°C (42°F)65 mm (2.6 inches)91%low
December Weather4°C (39°F)111 mm (4.4 inches)93%low

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