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September Weather in Luxemburg, United States

Last updated: June 24, 2025

In Luxemburg, United States, the average temperature in September is a pleasant 17°C (63°F). During this time, anticipate temperatures ranging from a chilly 1°C (35°F) at night to a warm 33°C (92°F) during the day. Expect about 67 mm (2.6 in) of precipitation spread over 11 days, contributing to a notable average humidity of 78%.

September Temperature in Luxemburg

In September in Luxemburg, the average temperature is 17°C (63°F). Maximums can reach 33°C (92°F), while minimums can drop as low as 1°C (35°F). Be sure to pack layers to comfortably enjoy the varied temperatures during your travels.

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

The chart illustrates September temperature patterns in Luxemburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Luxemburg, September typically has an average temperature of 17°C (63°F), with highs reaching up to 33°C (92°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec222233425567727063503628
Data source: Temperature data for Luxemburg 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 Luxemburg

In Luxemburg in September, the total precipitation amount is 67 mm (2.6 in) over the course of 11 days.

September Precipitation Trends in Luxemburg

The chart displays monthly precipitation patterns in Luxemburg, 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 Luxemburg, September typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec4248599810310510410267964754
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Luxemburg

In Luxemburg in September, humidity is 78%. With an average temperature of 17°C (63°F), this humidity feels like a warm, enveloping blanket, making traveling slightly uncomfortable as you navigate the sticky air, prompting the need for frequent breaks in cooler, shaded areas.

September Average Humidity in Luxemburg

This chart illustrates the average monthly humidity levels in Luxemburg, 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 Luxemburg is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%87%84%77%75%75%73%78%84%89%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Luxemburg

In Luxemburg in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Luxemburg.

Maximum UV Index Levels in Luxemburg for September

The chart shows the monthly maximum UV Index (UVI) for Luxemburg 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 Luxemburg typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Luxemburg 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 Luxemburg Compares to Other Months

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

This table compares monthly weather conditions in Luxemburg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)42 mm (1.6 inches)89%low
February Weather-6°C (22°F)48 mm (1.9 inches)90%moderate
March Weather1°C (33°F)59 mm (2.3 inches)87%moderate
April Weather6°C (43°F)98 mm (3.9 inches)84%high
May Weather13°C (56°F)103 mm (4.1 inches)77%very high
June Weather19°C (67°F)105 mm (4.1 inches)75%very high
July Weather22°C (72°F)104 mm (4.1 inches)74%very high
August Weather21°C (70°F)102 mm (4.0 inches)73%very high
September Weather17°C (63°F)67 mm (2.6 inches)78%high
October Weather10°C (51°F)96 mm (3.8 inches)84%moderate
November Weather2°C (36°F)47 mm (1.9 inches)89%moderate
December Weather-2°C (28°F)54 mm (2.1 inches)87%low

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