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September Weather in Ostrowiec, Poland

Last updated: August 27, 2025

In September, the average temperature in Ostrowiec, Poland hovers around 14°C (58°F). Expect cool evenings, with minimums dipping to 4°C (39°F), while the days can warm up to a comfortable 31°C (87°F). Be prepared for 82 mm (3.2 in) of precipitation spread over 14 days, coupled with a notable average humidity of 81%.

September Temperature in Ostrowiec

In September in Ostrowiec, the average temperature is 14°C (58°F). Maximums can reach 31°C (87°F), and minimums can drop to as low as 4°C (39°F). Be prepared for a range of temperatures, making it ideal for layering your clothing during your travels.

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

The chart illustrates September temperature patterns in Ostrowiec, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ostrowiec, September typically has an average temperature of 14°C (58°F), with highs reaching up to 31°C (87°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec343438455363646558514336
Data source: Temperature data for Ostrowiec 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 Ostrowiec

In Ostrowiec in September, the precipitation amount is 82 mm (3.2 in) spread over 14 days.

September Precipitation Trends in Ostrowiec

The chart displays monthly precipitation patterns in Ostrowiec, 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 Ostrowiec, September typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec6252594262561206882865360
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ostrowiec

In Ostrowiec in September, humidity is 81%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor adventures sticky and challenging, while also providing a lush, vibrant atmosphere perfect for exploring.

September Average Humidity in Ostrowiec

This chart illustrates the average monthly humidity levels in Ostrowiec, 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 Ostrowiec is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%87%85%81%81%81%80%81%84%86%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ostrowiec

In Ostrowiec in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Ostrowiec.

Maximum UV Index Levels in Ostrowiec for September

The chart shows the monthly maximum UV Index (UVI) for Ostrowiec 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 Ostrowiec typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124567765311
Data source: Ostrowiec 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 Ostrowiec Compares to Other Months

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

This table compares monthly weather conditions in Ostrowiec, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)62 mm (2.4 inches)87%low
February Weather1°C (34°F)52 mm (2.0 inches)87%low
March Weather3°C (38°F)59 mm (2.3 inches)87%moderate
April Weather7°C (45°F)42 mm (1.6 inches)85%moderate
May Weather12°C (54°F)62 mm (2.4 inches)81%high
June Weather17°C (64°F)56 mm (2.2 inches)81%high
July Weather18°C (65°F)120 mm (4.7 inches)81%high
August Weather18°C (65°F)68 mm (2.7 inches)80%high
September Weather14°C (58°F)82 mm (3.2 inches)81%moderate
October Weather10°C (51°F)86 mm (3.4 inches)84%moderate
November Weather6°C (43°F)53 mm (2.1 inches)86%low
December Weather2°C (36°F)60 mm (2.4 inches)85%low

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