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September Weather in Belvaux, Luxembourg

Last updated: August 23, 2025

In September, the average temperature in Belvaux, Luxembourg hovers around 15°C (59°F), with extremes ranging from a brisk 4°C (39°F) to a warm 32°C (90°F). Expect about 66 mm (2.6 in) of precipitation over 9 days, contributing to an average humidity of 83%. Stay prepared for a mix of weather during your visit!

September Temperature in Belvaux

In September in Belvaux average temperature is 15°C (59°F). Maximum can reach 32°C (90°F) and minimum can be as low as 4°C (39°F). Be prepared for a mix of warm and cool weather when traveling during this month.

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

The chart illustrates September temperature patterns in Belvaux, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Belvaux, 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 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec363943495664666659524239
Data source: Temperature data for Belvaux 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 Belvaux

In Belvaux in September, the precipitation amount is 66 mm (2.6 in) over the course of 9 days.

September Precipitation Trends in Belvaux

The chart displays monthly precipitation patterns in Belvaux, 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 Belvaux, September typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7479814074767060668272128
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Belvaux

In Belvaux 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 Belvaux

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

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

Maximum UV Index Levels in Belvaux for September

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

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

This table compares monthly weather conditions in Belvaux, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)74 mm (2.9 inches)91%low
February Weather4°C (39°F)79 mm (3.1 inches)90%moderate
March Weather6°C (43°F)81 mm (3.2 inches)88%moderate
April Weather10°C (50°F)40 mm (1.6 inches)84%high
May Weather13°C (56°F)74 mm (2.9 inches)81%very high
June Weather18°C (65°F)76 mm (3.0 inches)82%very high
July Weather19°C (67°F)70 mm (2.8 inches)82%very high
August Weather19°C (66°F)60 mm (2.4 inches)80%very high
September Weather15°C (59°F)66 mm (2.6 inches)83%high
October Weather11°C (52°F)82 mm (3.2 inches)89%moderate
November Weather6°C (43°F)72 mm (2.8 inches)91%low
December Weather4°C (39°F)128 mm (5.0 inches)93%low

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