nomadseason

September Weather in Koska, Croatia

Last updated: August 23, 2025

In Koska, Croatia during the month of September, the average temperature is a pleasant 18°C (65°F). However, temperatures can fluctuate significantly, with minimums dropping to 3°C (38°F) and maximums soaring to 34°C (93°F). Expect some rain, as the region receives an average precipitation of 44 mm (1.7 in) over about 6 days. Additionally, the average humidity rests at a comfortable 61%, making for a balanced climate overall.

September Temperature in Koska

In September in Koska, the average temperature is 18°C (65°F). Maximums can reach 34°C (93°F), and minimums can be as low as 3°C (38°F). This makes it a great time to explore outdoor activities while being prepared for both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Koska, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koska, September typically has an average temperature of 18°C (65°F), with highs reaching up to 34°C (93°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec344045546372747565554639
Data source: Temperature data for Koska generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Koska

In Koska in September, the total precipitation amount is 44 mm (1.7 in) spread over 6 days.

September Precipitation Trends in Koska

The chart displays monthly precipitation patterns in Koska, 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 Koska, September typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec406154538670635844624963
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Koska

In Koska in September humidity is 61%. With an average temperature of 18°C (65°F), this humidity feels like a warm blanket enveloping you, making your travels feel more comfortable yet slightly muggy, as you wander through the streets, perhaps seeking shade or a cool drink to help refresh you.

September Average Humidity in Koska

This chart illustrates the average monthly humidity levels in Koska, 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 Koska is approximately 61%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%84%77%70%70%68%63%52%61%81%86%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Koska

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

Maximum UV Index Levels in Koska for September

The chart shows the monthly maximum UV Index (UVI) for Koska 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 Koska typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986532
Data source: Koska 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 Koska Compares to Other Months

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

This table compares monthly weather conditions in Koska, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)40 mm (1.6 inches)89%low
February Weather5°C (41°F)61 mm (2.4 inches)84%moderate
March Weather7°C (45°F)54 mm (2.1 inches)77%moderate
April Weather12°C (54°F)53 mm (2.1 inches)70%high
May Weather17°C (63°F)85 mm (3.4 inches)70%very high
June Weather22°C (72°F)70 mm (2.8 inches)68%very high
July Weather23°C (74°F)63 mm (2.5 inches)63%very high
August Weather24°C (75°F)58 mm (2.3 inches)52%very high
September Weather18°C (65°F)44 mm (1.7 inches)61%high
October Weather13°C (55°F)62 mm (2.4 inches)81%moderate
November Weather8°C (46°F)49 mm (1.9 inches)86%moderate
December Weather4°C (39°F)63 mm (2.5 inches)89%low

Compare Koska's Climate with Cities Worldwide