September Weather in Karlstein, Austria

Last updated: August 22, 2025

In September, the average temperature in Karlstein, Austria hovers around 14°C (58°F). Expect a chilly minimum of 0°C (33°F) and the possibility of balmy days reaching up to 29°C (84°F). With an average humidity of 75% and 68 mm (2.7 in) of precipitation spread over 10 days, you might want to pack your umbrella along with your shades!

September Temperature in Karlstein

In September in Karlstein, the average temperature is 14°C (58°F), with maximums reaching 29°C (84°F) and minimums dropping to as low as 0°C (33°F). It’s a great time for travelers to enjoy mild weather while being prepared for both warm afternoons and chilly evenings.

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

The chart illustrates September temperature patterns in Karlstein, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Karlstein, September typically has an average temperature of 14°C (58°F), with highs reaching up to 29°C (84°F) and lows dropping to around 0°C (33°F).

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

September Precipitation in Karlstein

In Karlstein in September, the precipitation amount is 68 mm (2.7 in) over a span of 10 days.

September Precipitation Trends in Karlstein

The chart displays monthly precipitation patterns in Karlstein, 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 Karlstein, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 10 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 Karlstein

In Karlstein in September humidity is 75%. With an average temperature of 14°C (58°F), this humidity feels like a lingering blanket of warmth, making travel both refreshing and a bit stifling, as the moisture in the air may leave you feeling slightly sticky while enjoying outdoor adventures.

September Average Humidity in Karlstein

This chart illustrates the average monthly humidity levels in Karlstein, 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 Karlstein is approximately 75%, 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 Karlstein

In Karlstein 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 Karlstein, you can refer to this Hourly UV Index in Karlstein.

Maximum UV Index Levels in Karlstein for September

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

Data source: Karlstein 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 Karlstein Compares to Other Months

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

This table compares monthly weather conditions in Karlstein, 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 (31°F)	40 mm (1.6 inches)	90%	low
February Weather	1°C (35°F)	37 mm (1.5 inches)	87%	moderate
March Weather	4°C (40°F)	40 mm (1.6 inches)	85%	moderate
April Weather	9°C (48°F)	38 mm (1.5 inches)	78%	high
May Weather	13°C (55°F)	86 mm (3.4 inches)	73%	very high
June Weather	19°C (66°F)	78 mm (3.1 inches)	77%	very high
July Weather	19°C (66°F)	90 mm (3.5 inches)	76%	very high
August Weather	19°C (67°F)	73 mm (2.9 inches)	76%	very high
September Weather	14°C (58°F)	68 mm (2.7 inches)	75%	high
October Weather	10°C (50°F)	48 mm (1.9 inches)	85%	moderate
November Weather	4°C (40°F)	42 mm (1.7 inches)	90%	low
December Weather	1°C (34°F)	51 mm (2.0 inches)	91%	low