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September Weather in Ostroleka, Poland

Last updated: August 27, 2025

In September, the average temperature in Ostroleka, Poland hovers around 14°C (58°F). However, you might experience a range from a chilly 2°C (35°F) to a warm 30°C (86°F). Prepare for about 74 mm (2.9 in) of precipitation spread over 12 days, and note that the average humidity is a comfortable 71%.

September Temperature in Ostroleka

In September in Ostroleka, the average temperature is 14°C (58°F), with maximums reaching up to 30°C (86°F) and minimums dropping as low as 2°C (35°F). This variety in temperature makes it essential for travelers to pack layers to stay comfortable throughout the day.

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

The chart illustrates September temperature patterns in Ostroleka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ostroleka, September typically has an average temperature of 14°C (58°F), with highs reaching up to 30°C (86°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec303237475667676658504134
Data source: Temperature data for Ostroleka 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 Ostroleka

In Ostroleka in September, the precipitation amount is 74 mm (2.9 in) over a span of 12 days.

September Precipitation Trends in Ostroleka

The chart displays monthly precipitation patterns in Ostroleka, 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 Ostroleka, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec404340398768837974653652
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ostroleka

In Ostroleka in September humidity is 71%. With an average temperature of 14°C (58°F), this humidity feels like a damp embrace, making it essential for travelers to pack light, breathable clothing and stay hydrated while exploring the sights.

September Average Humidity in Ostroleka

This chart illustrates the average monthly humidity levels in Ostroleka, 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 Ostroleka is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%87%76%58%56%59%60%71%86%90%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ostroleka

In Ostroleka 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 Ostroleka.

Maximum UV Index Levels in Ostroleka for September

The chart shows the monthly maximum UV Index (UVI) for Ostroleka 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 Ostroleka typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124567865321
Data source: Ostroleka 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 Ostroleka Compares to Other Months

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

This table compares monthly weather conditions in Ostroleka, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)40 mm (1.6 inches)92%low
February Weather0°C (32°F)43 mm (1.7 inches)90%low
March Weather3°C (38°F)40 mm (1.6 inches)87%moderate
April Weather8°C (47°F)39 mm (1.5 inches)76%moderate
May Weather13°C (56°F)87 mm (3.4 inches)58%high
June Weather19°C (67°F)68 mm (2.7 inches)56%high
July Weather19°C (67°F)83 mm (3.3 inches)59%very high
August Weather19°C (67°F)79 mm (3.1 inches)60%high
September Weather14°C (58°F)74 mm (2.9 inches)71%moderate
October Weather10°C (50°F)65 mm (2.6 inches)86%moderate
November Weather5°C (41°F)36 mm (1.4 inches)90%low
December Weather1°C (34°F)52 mm (2.0 inches)93%low

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