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September Weather in Isen, Germany

Last updated: August 23, 2025

In Isen, Germany, the average temperature for September hovers around 15°C (59°F), with nightly lows dipping to a cool 3°C (37°F) and daytime highs reaching a warm 29°C (85°F). Expect 81 mm (3.2 in) of precipitation spread over 12 days, and prepare for a humid atmosphere with an average humidity of 85%.

September Temperature in Isen

In September in Isen, the average temperature is 15°C (59°F). Maximums can reach 29°C (85°F), and minimums can be as low as 3°C (37°F). This makes it a great time for travelers to enjoy mild weather while exploring all that Isen has to offer.

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

The chart illustrates September temperature patterns in Isen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isen, September typically has an average temperature of 15°C (59°F), with highs reaching up to 29°C (85°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec343842505766676859514136
Data source: Temperature data for Isen 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 Isen

In Isen in September, the precipitation amount is 81 mm (3.2 in) over a span of 12 days.

September Precipitation Trends in Isen

The chart displays monthly precipitation patterns in Isen, 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 Isen, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec7170684412410811511881745093
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Isen

In Isen in September, humidity is 85%. With an average temperature of 15°C (59°F), this humidity feels like a warm, damp blanket wrapping around you, making traveling quite uncomfortable and sticky. Be prepared to take frequent breaks and stay hydrated as you navigate the lush, but humid environment.

September Average Humidity in Isen

This chart illustrates the average monthly humidity levels in Isen, 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 Isen is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%88%84%77%82%83%84%85%88%88%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Isen

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

Maximum UV Index Levels in Isen for September

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

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

This table compares monthly weather conditions in Isen, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)71 mm (2.8 inches)91%low
February Weather3°C (38°F)70 mm (2.7 inches)89%moderate
March Weather6°C (43°F)68 mm (2.7 inches)88%moderate
April Weather10°C (50°F)44 mm (1.7 inches)84%high
May Weather14°C (57°F)123 mm (4.9 inches)77%very high
June Weather19°C (67°F)108 mm (4.2 inches)82%very high
July Weather20°C (68°F)115 mm (4.5 inches)83%very high
August Weather20°C (68°F)118 mm (4.6 inches)84%very high
September Weather15°C (59°F)81 mm (3.2 inches)85%high
October Weather11°C (51°F)74 mm (2.9 inches)88%moderate
November Weather5°C (41°F)50 mm (2.0 inches)88%low
December Weather2°C (37°F)93 mm (3.7 inches)91%low

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