September Weather in Castau, Romania

Last updated: August 27, 2025

In Castau, Romania, the average temperature in September hovers around 15°C (60°F). However, temperatures can fluctuate significantly, with a minimum of -2°C (28°F) and a maximum reaching up to 30°C (87°F). Expect some moisture, as there's an average precipitation of 57 mm (2.2 in) over 8 days. The air carries a comfortable average humidity of 58%, making it a varied yet pleasant month.

September Temperature in Castau

In September in Castau, the average temperature is 15°C (60°F). The maximum can reach 30°C (87°F) and the minimum can be as low as -2°C (28°F). This variation makes it essential for travelers to pack layers to adapt to changing temperatures throughout the day.

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

The chart illustrates September temperature patterns in Castau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castau, September typically has an average temperature of 15°C (60°F), with highs reaching up to 30°C (87°F) and lows dropping to around -2°C (28°F).

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

September Precipitation in Castau

In Castau in September, the precipitation amount is 57 mm (2.2 in) over the course of 8 days.

September Precipitation Trends in Castau

The chart displays monthly precipitation patterns in Castau, 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 Castau, September typically receives around 57 mm (2.2 inches) of precipitation spread over approximately 8 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 Castau

In Castau in September humidity is 58%. With an average temperature of 15°C (60°F), this humidity feels like a refreshing embrace, making it comfortable for traveling but requiring light layers and occasional breaks to stay cool and enjoy the scenery.

September Average Humidity in Castau

This chart illustrates the average monthly humidity levels in Castau, 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 Castau is approximately 58%, 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 Castau

In Castau in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Castau.

Maximum UV Index Levels in Castau for September

The chart shows the monthly maximum UV Index (UVI) for Castau 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 Castau typically reaches 7, which falls under the high exposure category.

Data source: Castau 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 Castau Compares to Other Months

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

This table compares monthly weather conditions in Castau, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	56 mm (2.2 inches)	91%	low
February Weather	2°C (36°F)	67 mm (2.6 inches)	86%	moderate
March Weather	4°C (40°F)	76 mm (3.0 inches)	83%	high
April Weather	9°C (49°F)	69 mm (2.7 inches)	74%	high
May Weather	13°C (57°F)	133 mm (5.2 inches)	70%	very high
June Weather	18°C (64°F)	141 mm (5.5 inches)	67%	very high
July Weather	19°C (67°F)	101 mm (4.0 inches)	65%	very high
August Weather	20°C (69°F)	74 mm (2.9 inches)	51%	very high
September Weather	15°C (60°F)	57 mm (2.2 inches)	58%	high
October Weather	10°C (51°F)	64 mm (2.5 inches)	80%	moderate
November Weather	6°C (44°F)	58 mm (2.3 inches)	88%	moderate
December Weather	2°C (35°F)	96 mm (3.8 inches)	90%	low