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September Weather in Grenzach-Wyhlen, Germany

Last updated: August 23, 2025

The average temperature in Grenzach-Wyhlen, Germany during September is a comfortable 16°C (61°F). However, expect variability, with minimums dipping to 2°C (36°F) and maximums soaring up to 30°C (86°F). You'll likely encounter precipitation of 69 mm (2.7 in) spread over 12 days, contributing to an average humidity level of 83%. Stay prepared for a mix of weather!

September Temperature in Grenzach-Wyhlen

In September in Grenzach-Wyhlen, the average temperature is 16°C (61°F), with maximums reaching up to 30°C (86°F) and minimums dropping as low as 2°C (36°F). This diverse temperature range makes Grenzach-Wyhlen an ideal destination for travelers seeking both warm days and cool nights.

September Weather in Grenzach-Wyhlen: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Grenzach-Wyhlen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grenzach-Wyhlen, September typically has an average temperature of 16°C (61°F), with highs reaching up to 30°C (86°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec353943505766686860514138
Data source: Temperature data for Grenzach-Wyhlen 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 Grenzach-Wyhlen

In Grenzach-Wyhlen in September, the precipitation amount is 69 mm (2.7 in) over the span of 12 days.

September Precipitation Trends in Grenzach-Wyhlen

The chart displays monthly precipitation patterns in Grenzach-Wyhlen, 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 Grenzach-Wyhlen, September typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec89758759126120122115699073124
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grenzach-Wyhlen

In Grenzach-Wyhlen 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 Grenzach-Wyhlen

This chart illustrates the average monthly humidity levels in Grenzach-Wyhlen, 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 Grenzach-Wyhlen is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%89%87%84%80%82%83%80%83%90%89%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Grenzach-Wyhlen

In Grenzach-Wyhlen 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 Grenzach-Wyhlen, you can refer to this Hourly UV Index in Grenzach-Wyhlen.

Maximum UV Index Levels in Grenzach-Wyhlen for September

The chart shows the monthly maximum UV Index (UVI) for Grenzach-Wyhlen 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 Grenzach-Wyhlen typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Grenzach-Wyhlen 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 Grenzach-Wyhlen Compares to Other Months

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

This table compares monthly weather conditions in Grenzach-Wyhlen, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)89 mm (3.5 inches)92%low
February Weather4°C (39°F)75 mm (2.9 inches)89%moderate
March Weather6°C (44°F)87 mm (3.4 inches)87%moderate
April Weather10°C (50°F)59 mm (2.3 inches)84%high
May Weather14°C (57°F)126 mm (5.0 inches)80%very high
June Weather19°C (66°F)120 mm (4.7 inches)82%very high
July Weather20°C (69°F)122 mm (4.8 inches)83%very high
August Weather20°C (68°F)115 mm (4.5 inches)80%very high
September Weather16°C (61°F)69 mm (2.7 inches)83%high
October Weather11°C (52°F)89 mm (3.5 inches)90%moderate
November Weather5°C (42°F)73 mm (2.9 inches)88%low
December Weather3°C (38°F)124 mm (4.9 inches)90%low

Compare Grenzach-Wyhlen's Climate with Cities Worldwide