December Weather in Black Forest, United States

Last updated: June 24, 2025

In Black Forest, United States, the average temperature for December hovers around -2°C (29°F). Expect a chilly range, with minimum temperatures diving as low as -23°C (-9°F) and maximums peaking at 20°C (68°F). Precipitation is minimal, averaging 11 mm (0.4 in) over 3 days, while the air remains notably humid at 80%.

December Temperature in Black Forest

In December in Black Forest, the average temperature is -2°C (29°F). Maximum temperatures can reach 20°C (68°F), while minimums can drop as low as -23°C (-9°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to enjoy their stay in Black Forest.

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

The chart illustrates December 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, December typically has an average temperature of -2°C (29°F), with highs reaching up to 20°C (68°F) and lows dropping to around -23°C (-9°F).

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

December Precipitation in Black Forest

In Black Forest in December, the precipitation amount is 11 mm (0.4 in) over the course of 3 days.

December Precipitation Trends in Black Forest

The chart displays monthly precipitation patterns in Black Forest, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Black Forest, December typically receives around 11 mm (0.4 inches) of precipitation spread over approximately 3 days.

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

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Millimeters (mm) Inches (in)

December Humidity in Black Forest

In Black Forest in December humidity is 80%. With an average temperature of -2°C (29°F), this humidity feels like a heavy, biting chill that seeps into your bones, making outdoor exploration uncomfortable and requiring extra layers to ward off both the cold and the dampness.

December Average Humidity in Black Forest

This chart illustrates the average monthly humidity levels in Black Forest, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Black Forest is approximately 80%, offering insight into how humid the weather typically is during this month.

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

December UV Index in Black Forest

In Black Forest in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Black Forest for better planning.

Maximum UV Index Levels in Black Forest for December

The chart shows the monthly maximum UV Index (UVI) for Black Forest in December, 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 December, the maximum UV index in Black Forest typically reaches 4, which falls under the moderate exposure category.

Data source: Black Forest December 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 December 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 December’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 December’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