September Weather in Kastel Stari, Croatia

Last updated: August 23, 2025

In September, the average temperature in Kastel Stari, Croatia is a pleasant 22°C (71°F). Expect a minimum chill of 12°C (54°F) and the warmth peaking at 30°C (86°F). During this month, rainfall totals about 89 mm (3.5 in) over 7 days, complemented by an average humidity of 69%.

September Temperature in Kastel Stari

In September in Kastel Stari, the average temperature is 22°C (71°F). Maximums can reach 30°C (86°F), while minimums can drop to as low as 12°C (54°F). This pleasant weather makes Kastel Stari an ideal destination for travelers seeking a comfortable climate for outdoor activities.

September Weather in Kastel Stari: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Kastel Stari, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kastel Stari, September typically has an average temperature of 22°C (71°F), with highs reaching up to 30°C (86°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Kastel Stari

In Kastel Stari in September, the total precipitation amount is 89 mm (3.5 in) spread over a period of 7 days.

September Precipitation Trends in Kastel Stari

The chart displays monthly precipitation patterns in Kastel Stari, 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 Kastel Stari, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 7 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 Kastel Stari

In Kastel Stari in September humidity is 69%. With an average temperature of 22°C (71°F), this humidity feels like walking through a warm embrace, making travel slightly uncomfortable yet refreshing, as the air clings to your skin and adds a layer of warmth to your exploration.

September Average Humidity in Kastel Stari

This chart illustrates the average monthly humidity levels in Kastel Stari, 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 Kastel Stari is approximately 69%, 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 Kastel Stari

In Kastel Stari 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 Kastel Stari.

Maximum UV Index Levels in Kastel Stari for September

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

Data source: Kastel Stari 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 Kastel Stari Compares to Other Months

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

This table compares monthly weather conditions in Kastel Stari, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	92 mm (3.6 inches)	83%	low
February Weather	10°C (50°F)	87 mm (3.4 inches)	76%	moderate
March Weather	11°C (52°F)	76 mm (3.0 inches)	73%	high
April Weather	14°C (57°F)	67 mm (2.6 inches)	75%	high
May Weather	18°C (64°F)	57 mm (2.2 inches)	78%	very high
June Weather	22°C (72°F)	29 mm (1.1 inches)	75%	very high
July Weather	24°C (76°F)	17 mm (0.7 inches)	71%	very high
August Weather	26°C (79°F)	22 mm (0.9 inches)	65%	very high
September Weather	22°C (71°F)	89 mm (3.5 inches)	69%	high
October Weather	17°C (64°F)	94 mm (3.7 inches)	76%	moderate
November Weather	14°C (58°F)	222 mm (8.7 inches)	81%	moderate
December Weather	10°C (51°F)	189 mm (7.5 inches)	81%	low