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September Weather in Saarlouis, Germany

Last updated: August 23, 2025

In September, the average temperature in Saarlouis, Germany hovers around 16°C (60°F), with a minimum of 4°C (40°F) and a maximum soaring to 33°C (91°F). Expect some moisture in the air, as precipitation reaches 67 mm (2.6 in) over approximately 9 days. Coupled with an average humidity of 83%, it's advisable to prepare for a rather humid month in this charming destination!

September Temperature in Saarlouis

In September in Saarlouis, the average temperature is 16°C (60°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 4°C (40°F). This diverse temperature range makes Saarlouis an ideal destination for travelers seeking both warm and cooler experiences.

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

The chart illustrates September temperature patterns in Saarlouis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saarlouis, September typically has an average temperature of 16°C (60°F), with highs reaching up to 33°C (91°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec364044505766686760524339
Data source: Temperature data for Saarlouis 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 Saarlouis

In Saarlouis in September, the total precipitation amount is 67 mm (2.6 in), occurring over a span of 9 days.

September Precipitation Trends in Saarlouis

The chart displays monthly precipitation patterns in Saarlouis, 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 Saarlouis, September typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8487944378716550677477147
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saarlouis

In Saarlouis in September humidity is 83%. With an average temperature of 16°C (60°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities a bit uncomfortable for traveling.

September Average Humidity in Saarlouis

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

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

Maximum UV Index Levels in Saarlouis for September

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

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

This table compares monthly weather conditions in Saarlouis, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)84 mm (3.3 inches)91%low
February Weather4°C (40°F)86 mm (3.4 inches)90%moderate
March Weather7°C (44°F)94 mm (3.7 inches)88%moderate
April Weather10°C (51°F)43 mm (1.7 inches)84%high
May Weather14°C (57°F)78 mm (3.1 inches)81%very high
June Weather19°C (66°F)71 mm (2.8 inches)82%very high
July Weather20°C (68°F)65 mm (2.6 inches)82%very high
August Weather20°C (68°F)50 mm (2.0 inches)80%very high
September Weather16°C (60°F)67 mm (2.6 inches)83%high
October Weather11°C (52°F)74 mm (2.9 inches)89%moderate
November Weather6°C (43°F)77 mm (3.0 inches)91%low
December Weather4°C (40°F)147 mm (5.8 inches)93%low

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