September Weather in Black Forest, United States

Last updated: June 24, 2025

In September, the average temperature in Black Forest, United States hovers around 16°C (61°F), with a temperature range from a chilly -4°C (26°F) to a warm 33°C (91°F). Expect about 36 mm (1.4 in) of precipitation spread over approximately 5 days, accompanied by an average humidity level of 79%. Embrace the diverse weather this month has to offer!

September Temperature in Black Forest

In September in Black Forest, the average temperature is 16°C (61°F). The maximum can reach 33°C (91°F), and the minimum can be as low as -4°C (26°F). This climate variation means travelers should be prepared for both warm days and chilly nights when visiting.

September Weather in Black Forest: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Black Forest, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Black Forest, September typically has an average temperature of 16°C (61°F), with highs reaching up to 33°C (91°F) and lows dropping to around -4°C (26°F).

Data source: Temperature data for Black Forest generated using information from the Copernicus Climate Change Service.

September Precipitation in Black Forest

In Black Forest in September, the precipitation amount is 36 mm (1.4 in) over the course of 5 days.

September Precipitation Trends in Black Forest

The chart displays monthly precipitation patterns in Black Forest, 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 Black Forest, September typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 5 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 Black Forest

In Black Forest in September humidity is 79%. With an average temperature of 16°C (61°F), this humidity feels like a warm, moist embrace, making travel a bit more challenging as the air tends to weigh heavily, but it also offers a refreshing atmosphere perfect for exploring local sights and enjoying nature.

September Average Humidity in Black Forest

This chart illustrates the average monthly humidity levels in Black Forest, 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 Black Forest is approximately 79%, 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 Black Forest

In Black Forest in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Black Forest.

Maximum UV Index Levels in Black Forest for September

The chart shows the monthly maximum UV Index (UVI) for Black Forest 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 Black Forest typically reaches 10, which falls under the very high exposure category.

Data source: Black Forest 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 Black Forest Compares to Other Months

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

This table compares monthly weather conditions in Black Forest, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	15 mm (0.6 inches)	74%	moderate
February Weather	-4°C (25°F)	24 mm (0.9 inches)	75%	high
March Weather	2°C (35°F)	55 mm (2.2 inches)	66%	very high
April Weather	6°C (42°F)	47 mm (1.9 inches)	62%	extreme
May Weather	11°C (52°F)	86 mm (3.4 inches)	74%	extreme
June Weather	18°C (64°F)	44 mm (1.8 inches)	76%	extreme
July Weather	20°C (68°F)	85 mm (3.3 inches)	75%	extreme
August Weather	19°C (67°F)	53 mm (2.1 inches)	80%	extreme
September Weather	16°C (61°F)	36 mm (1.4 inches)	79%	very high
October Weather	7°C (45°F)	38 mm (1.5 inches)	77%	high
November Weather	2°C (36°F)	20 mm (0.8 inches)	74%	moderate
December Weather	-2°C (29°F)	11 mm (0.4 inches)	80%	moderate