September Weather in Jena, United States

Last updated: June 24, 2025

In September, the average temperature in Jena, United States is a warm 26°C (79°F). This idyllic weather features a minimum of 12°C (55°F) and can soar to a maximum of 40°C (104°F). Visitors should be prepared for some rain, with precipitation totaling 111 mm (4.4 in) over about 9 days. With an average humidity of 79%, the air feels pleasantly tropical, making it a delightful time to explore!

September Temperature in Jena

In September in Jena, the average temperature is 26°C (79°F). Maximum temperatures can reach 40°C (104°F), while minimum temperatures can drop as low as 12°C (55°F). This climate offers great flexibility for travelers, allowing for both warm outdoor activities and cooler evenings.

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

The chart illustrates September temperature patterns in Jena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jena, September typically has an average temperature of 26°C (79°F), with highs reaching up to 40°C (104°F) and lows dropping to around 12°C (55°F).

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

September Precipitation in Jena

In Jena in September, the precipitation amount is 111 mm (4.4 in) over the course of 9 days.

September Precipitation Trends in Jena

The chart displays monthly precipitation patterns in Jena, 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 Jena, September typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Jena

In Jena in September humidity is 79%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel exhausting. Travelers should be prepared for a heavy air that clings to the skin, making hydration essential while navigating the sights and sounds of the city.

September Average Humidity in Jena

This chart illustrates the average monthly humidity levels in Jena, 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 Jena 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 Jena

In Jena 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 Jena.

Maximum UV Index Levels in Jena for September

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

Data source: Jena 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 Jena Compares to Other Months

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

This table compares monthly weather conditions in Jena, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	113 mm (4.4 inches)	83%	moderate
February Weather	12°C (54°F)	155 mm (6.1 inches)	83%	high
March Weather	17°C (63°F)	111 mm (4.4 inches)	80%	very high
April Weather	19°C (66°F)	147 mm (5.8 inches)	81%	extreme
May Weather	24°C (75°F)	164 mm (6.5 inches)	81%	extreme
June Weather	27°C (80°F)	133 mm (5.2 inches)	78%	extreme
July Weather	28°C (83°F)	124 mm (4.9 inches)	79%	extreme
August Weather	28°C (83°F)	130 mm (5.1 inches)	79%	extreme
September Weather	26°C (79°F)	111 mm (4.4 inches)	79%	very high
October Weather	21°C (70°F)	119 mm (4.7 inches)	77%	very high
November Weather	14°C (57°F)	75 mm (3.0 inches)	85%	high
December Weather	12°C (54°F)	127 mm (5.0 inches)	88%	moderate