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September Weather in Altkalen, Germany

Last updated: August 23, 2025

In September, the average temperature in Altkalen, Germany hovers around 15°C (59°F), with fluctuations as low as 3°C (38°F) and soaring up to 30°C (86°F). Expect 53 mm (2.1 in) of precipitation spread over 9 days, contributing to an average humidity level of 82%. Enjoy the unique climate this month brings!

September Temperature in Altkalen

In September in Altkalen, the average temperature is 15°C (59°F). The maximum can reach 30°C (86°F), while the minimum can be as low as 3°C (38°F). This climate makes Altkalen an ideal destination for travelers looking to enjoy mild temperatures and a range of outdoor activities.

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

The chart illustrates September temperature patterns in Altkalen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altkalen, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (86°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec363740465464656559524338
Data source: Temperature data for Altkalen 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 Altkalen

In Altkalen in September, the total precipitation amount is 53 mm (2.1 in) spread over 9 days.

September Precipitation Trends in Altkalen

The chart displays monthly precipitation patterns in Altkalen, 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 Altkalen, September typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec554360465861826853754955
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Altkalen

In Altkalen in September, humidity is 82%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and uncomfortable for travelers.

September Average Humidity in Altkalen

This chart illustrates the average monthly humidity levels in Altkalen, 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 Altkalen is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%88%82%74%75%74%71%82%86%89%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Altkalen

In Altkalen 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 Altkalen.

Maximum UV Index Levels in Altkalen for September

The chart shows the monthly maximum UV Index (UVI) for Altkalen 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 Altkalen typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124568765321
Data source: Altkalen 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 Altkalen Compares to Other Months

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

This table compares monthly weather conditions in Altkalen, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)55 mm (2.2 inches)91%low
February Weather3°C (37°F)43 mm (1.7 inches)90%low
March Weather4°C (40°F)60 mm (2.4 inches)88%moderate
April Weather8°C (47°F)46 mm (1.8 inches)82%moderate
May Weather12°C (55°F)58 mm (2.3 inches)74%high
June Weather18°C (64°F)61 mm (2.4 inches)75%very high
July Weather18°C (65°F)82 mm (3.2 inches)74%high
August Weather19°C (66°F)68 mm (2.7 inches)71%high
September Weather15°C (59°F)53 mm (2.1 inches)82%moderate
October Weather11°C (52°F)75 mm (2.9 inches)86%moderate
November Weather6°C (44°F)49 mm (1.9 inches)89%low
December Weather3°C (38°F)55 mm (2.2 inches)93%low

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