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September Weather in Horstmar, Germany

Last updated: August 23, 2025

In September, the average temperature in Horstmar, Germany hovers around 15°C (59°F). However, temperatures can vary significantly, with a minimum of 2°C (37°F) and soaring up to a maximum of 32°C (90°F). Expect 64 mm (2.5 in) of precipitation over about 10 days, contributing to an average humidity of 81%—perfect for those who enjoy a refreshing, moist atmosphere!

September Temperature in Horstmar

In September in Horstmar, the average temperature is 15°C (59°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as 2°C (37°F). Therefore, travelers should be prepared for a range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Horstmar, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Horstmar, September typically has an average temperature of 15°C (59°F), with highs reaching up to 32°C (90°F) and lows dropping to around 2°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec384044505766666659544441
Data source: Temperature data for Horstmar 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 Horstmar

In Horstmar in September, the precipitation amount is 64 mm (2.5 in) over a span of 10 days.

September Precipitation Trends in Horstmar

The chart displays monthly precipitation patterns in Horstmar, 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 Horstmar, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec687876376161757564865592
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Horstmar

In Horstmar 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 Horstmar

This chart illustrates the average monthly humidity levels in Horstmar, 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 Horstmar is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%87%84%77%74%72%71%81%88%91%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Horstmar

In Horstmar 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 Horstmar.

Maximum UV Index Levels in Horstmar for September

The chart shows the monthly maximum UV Index (UVI) for Horstmar 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 Horstmar typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Horstmar 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 Horstmar Compares to Other Months

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

This table compares monthly weather conditions in Horstmar, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (39°F)68 mm (2.7 inches)91%low
February Weather4°C (40°F)78 mm (3.1 inches)90%low
March Weather7°C (44°F)76 mm (3.0 inches)87%moderate
April Weather10°C (50°F)37 mm (1.5 inches)84%moderate
May Weather14°C (57°F)61 mm (2.4 inches)77%high
June Weather19°C (66°F)60 mm (2.4 inches)74%very high
July Weather19°C (67°F)75 mm (3.0 inches)72%very high
August Weather19°C (67°F)75 mm (3.0 inches)71%high
September Weather15°C (59°F)64 mm (2.5 inches)81%moderate
October Weather12°C (54°F)86 mm (3.4 inches)88%moderate
November Weather7°C (45°F)55 mm (2.2 inches)91%low
December Weather5°C (41°F)92 mm (3.6 inches)92%low

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