September Weather in Osek, Czech Republic

Last updated: August 23, 2025

In Osek, Czech Republic, the average temperature in September hovers around 14°C (58°F). Temperatures can range from a chilly 0°C (32°F) to a warm 29°C (84°F). Expect about 63 mm (2.5 in) of precipitation over 11 days and an average humidity level of 82%, creating a uniquely humid atmosphere.

September Temperature in Osek

In September in Osek, the average temperature is 14°C (58°F), with maximums reaching 29°C (84°F) and minimums dipping as low as 0°C (32°F). Be prepared for a mix of warmth and cooler moments, making it ideal for layering your travel wardrobe.

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

The chart illustrates September temperature patterns in Osek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Osek, 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 (32°F).

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

September Precipitation in Osek

In Osek in September, the precipitation amount is 63 mm (2.5 in) during a total of 11 days.

September Precipitation Trends in Osek

The chart displays monthly precipitation patterns in Osek, 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 Osek, September typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 11 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 Osek

In Osek in September, humidity is 82%. With an average temperature of 14°C (58°F), this humidity feels like a heavy blanket wrapping around you, making travel uncomfortable and sticky.

September Average Humidity in Osek

This chart illustrates the average monthly humidity levels in Osek, 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 Osek is approximately 82%, 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 Osek

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

Maximum UV Index Levels in Osek for September

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

Data source: Osek 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 Osek Compares to Other Months

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

This table compares monthly weather conditions in Osek, 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)	45 mm (1.8 inches)	91%	low
February Weather	1°C (34°F)	48 mm (1.9 inches)	89%	moderate
March Weather	4°C (39°F)	53 mm (2.1 inches)	87%	moderate
April Weather	8°C (47°F)	40 mm (1.6 inches)	82%	high
May Weather	13°C (55°F)	96 mm (3.8 inches)	76%	very high
June Weather	18°C (65°F)	90 mm (3.5 inches)	80%	very high
July Weather	19°C (66°F)	77 mm (3.0 inches)	80%	very high
August Weather	19°C (66°F)	87 mm (3.4 inches)	82%	high
September Weather	14°C (58°F)	63 mm (2.5 inches)	82%	high
October Weather	10°C (49°F)	55 mm (2.2 inches)	87%	moderate
November Weather	4°C (40°F)	37 mm (1.5 inches)	89%	low
December Weather	1°C (35°F)	57 mm (2.2 inches)	92%	low