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September Weather in Ostarije, Croatia

Last updated: August 23, 2025

In September, the average temperature in Ostarije, Croatia is a pleasant 16°C (61°F). Expect a temperature range that can dip to a cool 3°C (37°F) and soar up to a warm 32°C (89°F). During this month, you can anticipate 144 mm (5.7 in) of precipitation spread over 11 days, with an average humidity of 62%.

September Temperature in Ostarije

In September in Ostarije, the average temperature is 16°C (61°F). Maximum temperatures can reach 32°C (89°F), while the minimum can drop as low as 3°C (37°F). Be prepared for a range of weather conditions when traveling during this time.

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

The chart illustrates September temperature patterns in Ostarije, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ostarije, September typically has an average temperature of 16°C (61°F), with highs reaching up to 32°C (89°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec343943515868717161534538
Data source: Temperature data for Ostarije generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Ostarije

In Ostarije in September, the precipitation amount is 144 mm (5.7 in) during 11 days, indicating a relatively wet period for the region.

September Precipitation Trends in Ostarije

The chart displays monthly precipitation patterns in Ostarije, 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 Ostarije, September typically receives around 144 mm (5.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec741047594155698991144115130131
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ostarije

In Ostarije in September, humidity is 62%. With an average temperature of 16°C (61°F), this humidity feels like a gentle blanket, making traveling comfortable yet occasionally sticky, prompting the need for light, breathable clothing to fully enjoy the sights.

September Average Humidity in Ostarije

This chart illustrates the average monthly humidity levels in Ostarije, 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 Ostarije is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%83%75%72%70%69%64%51%62%81%87%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ostarije

In Ostarije 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 Ostarije.

Maximum UV Index Levels in Ostarije for September

The chart shows the monthly maximum UV Index (UVI) for Ostarije 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 Ostarije typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789987532
Data source: Ostarije 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 Ostarije Compares to Other Months

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

This table compares monthly weather conditions in Ostarije, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)74 mm (2.9 inches)89%low
February Weather4°C (40°F)104 mm (4.1 inches)83%moderate
March Weather6°C (43°F)75 mm (3.0 inches)75%moderate
April Weather11°C (51°F)93 mm (3.7 inches)72%high
May Weather15°C (59°F)155 mm (6.1 inches)70%very high
June Weather20°C (69°F)69 mm (2.7 inches)69%very high
July Weather22°C (71°F)89 mm (3.5 inches)64%very high
August Weather22°C (71°F)91 mm (3.6 inches)51%very high
September Weather16°C (61°F)144 mm (5.7 inches)62%high
October Weather12°C (53°F)115 mm (4.5 inches)81%moderate
November Weather7°C (45°F)130 mm (5.1 inches)87%moderate
December Weather3°C (38°F)131 mm (5.2 inches)88%low

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