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September Weather in Sieradz, Poland

Last updated: August 27, 2025

In September, the average temperature in Sieradz, Poland is a moderate 15°C (60°F). While the minimum can drop to a chilly 1°C (35°F), the mercury can rise as high as a warm 34°C (93°F). Expect about 82 mm (3.2 in) of precipitation spread over 12 days, contributing to an average humidity of 72%. Enjoy the unique climate of this intriguing location!

September Temperature in Sieradz

In September in Sieradz, the average temperature is 15°C (60°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 1°C (35°F). Be prepared for a wide range of temperatures and pack accordingly for your trip!

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

The chart illustrates September temperature patterns in Sieradz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sieradz, September typically has an average temperature of 15°C (60°F), with highs reaching up to 34°C (93°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec323439485768686959514335
Data source: Temperature data for Sieradz 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 Sieradz

In Sieradz in September, the precipitation amount is 82 mm (3.2 in) occurring over a span of 12 days.

September Precipitation Trends in Sieradz

The chart displays monthly precipitation patterns in Sieradz, 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 Sieradz, September typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec424540477776728282663648
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sieradz

In Sieradz in September humidity is 72%. With an average temperature of 15°C (60°F), this humidity feels like a warm embrace, creating a slightly muggy atmosphere that can make strolling around a bit sticky. Travelers might find themselves longing for a refreshing breeze, and it’s advisable to stay hydrated while exploring local sights.

September Average Humidity in Sieradz

This chart illustrates the average monthly humidity levels in Sieradz, 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 Sieradz is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%79%65%66%67%67%72%83%90%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sieradz

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

Maximum UV Index Levels in Sieradz for September

The chart shows the monthly maximum UV Index (UVI) for Sieradz 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 Sieradz typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124577876321
Data source: Sieradz 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 Sieradz Compares to Other Months

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

This table compares monthly weather conditions in Sieradz, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)42 mm (1.7 inches)90%low
February Weather1°C (34°F)45 mm (1.8 inches)88%low
March Weather4°C (40°F)40 mm (1.6 inches)86%moderate
April Weather9°C (49°F)47 mm (1.8 inches)79%moderate
May Weather14°C (57°F)77 mm (3.0 inches)65%high
June Weather20°C (68°F)76 mm (3.0 inches)66%high
July Weather20°C (68°F)72 mm (2.9 inches)67%very high
August Weather20°C (69°F)82 mm (3.2 inches)67%high
September Weather15°C (60°F)82 mm (3.2 inches)72%high
October Weather11°C (51°F)66 mm (2.6 inches)83%moderate
November Weather6°C (43°F)36 mm (1.4 inches)90%low
December Weather2°C (36°F)48 mm (1.9 inches)92%low

Compare Sieradz's Climate with Cities Worldwide