September Weather in Trostberg an der Alz, Germany

Last updated: August 23, 2025

In September, the average temperature in Trostberg an der Alz, Germany hovers around 15°C (59°F). During this time, you can expect temperatures to range from a brisk 3°C (37°F) to a warm 29°C (84°F). With an average precipitation amount of 103 mm (4.0 in) over 12 days, keep an umbrella handy! Additionally, the air carries an average humidity of 83%, adding a touch of moisture to the atmosphere.

September Temperature in Trostberg an der Alz

In September, in Trostberg an der Alz, the average temperature is 15°C (59°F). The maximum can reach 29°C (84°F), while the minimum can drop as low as 3°C (37°F). It's a great time for travelers to enjoy mild weather and a variety of outdoor activities.

September Weather in Trostberg an der Alz: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Trostberg an der Alz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trostberg an der Alz, September typically has an average temperature of 15°C (59°F), with highs reaching up to 29°C (84°F) and lows dropping to around 3°C (37°F).

Data source: Temperature data for Trostberg an der Alz generated using information from the Copernicus Climate Change Service.

September Precipitation in Trostberg an der Alz

In Trostberg an der Alz in September, the precipitation amount is 103 mm (4.0 in) recorded over a span of 12 days.

September Precipitation Trends in Trostberg an der Alz

The chart displays monthly precipitation patterns in Trostberg an der Alz, 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 Trostberg an der Alz, September typically receives around 103 mm (4.0 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Trostberg an der Alz

In Trostberg an der Alz in September humidity is 83%. With an average temperature of 15°C (59°F), this humidity feels like a cozy, damp embrace that can be quite stifling for traveling, making even short walks feel more exhausting than they should, and prompting a need for frequent breaks in shaded or air-conditioned areas.

September Average Humidity in Trostberg an der Alz

This chart illustrates the average monthly humidity levels in Trostberg an der Alz, 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 Trostberg an der Alz is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Trostberg an der Alz

In Trostberg an der Alz 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 Trostberg an der Alz, you can refer to this Hourly UV Index in Trostberg an der Alz.

Maximum UV Index Levels in Trostberg an der Alz for September

The chart shows the monthly maximum UV Index (UVI) for Trostberg an der Alz 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 Trostberg an der Alz typically reaches 6, which falls under the high exposure category.

Data source: Trostberg an der Alz 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 Trostberg an der Alz Compares to Other Months

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

This table compares monthly weather conditions in Trostberg an der Alz, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	84 mm (3.3 inches)	93%	low
February Weather	3°C (38°F)	78 mm (3.1 inches)	89%	moderate
March Weather	5°C (42°F)	78 mm (3.1 inches)	86%	moderate
April Weather	10°C (50°F)	58 mm (2.3 inches)	83%	high
May Weather	13°C (56°F)	143 mm (5.6 inches)	78%	very high
June Weather	19°C (66°F)	129 mm (5.1 inches)	79%	very high
July Weather	19°C (67°F)	136 mm (5.4 inches)	82%	very high
August Weather	19°C (67°F)	145 mm (5.7 inches)	80%	very high
September Weather	15°C (59°F)	103 mm (4.0 inches)	83%	high
October Weather	11°C (51°F)	95 mm (3.7 inches)	90%	moderate
November Weather	5°C (41°F)	65 mm (2.5 inches)	89%	low
December Weather	2°C (37°F)	108 mm (4.2 inches)	90%	low