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September Weather in Wilhelmshaven, Germany

Last updated: August 23, 2025

In September, the average temperature in Wilhelmshaven, Germany hovers around 15°C (59°F), with a comfortable range that can dip to a cool 5°C (40°F) and rise to a warm 29°C (85°F). Expect 56 mm (2.2 in) of precipitation spread over 12 days, contributing to an average humidity of 81%—perfect for those who enjoy a refreshing atmosphere!

September Temperature in Wilhelmshaven

In September in Wilhelmshaven, the average temperature is 15°C (59°F). Maximums can reach 29°C (85°F) and minimums can be as low as 5°C (40°F). This climate provides a pleasant environment for exploring outdoor activities and enjoying the local attractions.

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

The chart illustrates September temperature patterns in Wilhelmshaven, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wilhelmshaven, 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 5°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec393942475463646558534540
Data source: Temperature data for Wilhelmshaven 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 Wilhelmshaven

In Wilhelmshaven in September, the precipitation amount is 56 mm (2.2 in) spread over 12 days.

September Precipitation Trends in Wilhelmshaven

The chart displays monthly precipitation patterns in Wilhelmshaven, 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 Wilhelmshaven, September typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec625765485979878556855474
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Wilhelmshaven

In Wilhelmshaven in September humidity is 81%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket draped over you, making traveling quite uncomfortable as you constantly wipe away beads of sweat and feel the stickiness clinging to your clothes.

September Average Humidity in Wilhelmshaven

This chart illustrates the average monthly humidity levels in Wilhelmshaven, 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 Wilhelmshaven is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%82%73%66%66%67%81%86%90%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Wilhelmshaven

In Wilhelmshaven in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Wilhelmshaven.

Maximum UV Index Levels in Wilhelmshaven for September

The chart shows the monthly maximum UV Index (UVI) for Wilhelmshaven 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 Wilhelmshaven typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123578775321
Data source: Wilhelmshaven 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 Wilhelmshaven Compares to Other Months

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

This table compares monthly weather conditions in Wilhelmshaven, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)62 mm (2.4 inches)91%low
February Weather4°C (39°F)57 mm (2.2 inches)89%low
March Weather6°C (42°F)65 mm (2.6 inches)87%moderate
April Weather9°C (48°F)48 mm (1.9 inches)82%moderate
May Weather12°C (55°F)59 mm (2.3 inches)73%high
June Weather17°C (63°F)79 mm (3.1 inches)66%very high
July Weather18°C (64°F)87 mm (3.4 inches)66%high
August Weather18°C (65°F)84 mm (3.3 inches)67%high
September Weather15°C (59°F)56 mm (2.2 inches)81%moderate
October Weather12°C (53°F)85 mm (3.4 inches)86%moderate
November Weather7°C (45°F)54 mm (2.1 inches)90%low
December Weather5°C (41°F)74 mm (2.9 inches)90%low

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