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September Weather in Grundviller, France

Last updated: August 23, 2025

In September, the average temperature in Grundviller, France hovers around 16°C (61°F), offering a comfortable climate for outdoor activities. However, be prepared for temperature fluctuations, as the mercury can dip to a chilly 4°C (40°F) or soar to a steamy 33°C (92°F). With an average precipitation of 60 mm (2.4 in) spread across 9 days, and humidity levels reaching 83%, it's wise to pack an umbrella and dress in layers for changing weather patterns.

September Temperature in Grundviller

In September in Grundviller, the average temperature is 16°C (61°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop as low as 4°C (40°F). Be prepared for a wide range of temperatures when traveling during this month.

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

The chart illustrates September temperature patterns in Grundviller, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grundviller, September typically has an average temperature of 16°C (61°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec364044505767696861534340
Data source: Temperature data for Grundviller 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 Grundviller

In Grundviller in September, the total precipitation amount is 60 mm (2.4 in), occurring over a span of 9 days.

September Precipitation Trends in Grundviller

The chart displays monthly precipitation patterns in Grundviller, 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 Grundviller, September typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7979804276635750606367122
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grundviller

In Grundviller in September, humidity is 83%. With an average temperature of 16°C (61°F), this humidity feels like a warm, muggy blanket wrapping around you, making travel a bit sticky and potentially uncomfortable as you navigate through the sights.

September Average Humidity in Grundviller

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

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

Maximum UV Index Levels in Grundviller for September

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

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

This table compares monthly weather conditions in Grundviller, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)79 mm (3.1 inches)91%low
February Weather5°C (40°F)79 mm (3.1 inches)90%moderate
March Weather7°C (44°F)80 mm (3.2 inches)88%moderate
April Weather10°C (51°F)42 mm (1.7 inches)84%high
May Weather14°C (57°F)76 mm (3.0 inches)81%very high
June Weather19°C (67°F)63 mm (2.5 inches)82%very high
July Weather20°C (69°F)57 mm (2.3 inches)82%very high
August Weather20°C (69°F)50 mm (2.0 inches)80%very high
September Weather16°C (61°F)60 mm (2.4 inches)83%high
October Weather12°C (53°F)63 mm (2.5 inches)89%moderate
November Weather6°C (43°F)67 mm (2.7 inches)91%low
December Weather4°C (40°F)122 mm (4.8 inches)93%low

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