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September Weather in Olsztynek, Poland

Last updated: August 27, 2025

In September, the average temperature in Olsztynek, Poland hovers around 14°C (57°F). Visitors can expect a minimum of 2°C (36°F) and a maximum of 31°C (88°F), offering a delightful range for outdoor activities. However, prepare for some rain, as precipitation averages 79 mm (3.1 in) over 11 days. With an average humidity of 71%, it's the perfect time to enjoy the region's unique charm!

September Temperature in Olsztynek

In September in Olsztynek, the average temperature is 14°C (57°F). Maximum temperatures can reach 31°C (88°F), while minimums can drop to as low as 2°C (36°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Olsztynek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Olsztynek, September typically has an average temperature of 14°C (57°F), with highs reaching up to 31°C (88°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec303137465464656557494133
Data source: Temperature data for Olsztynek 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 Olsztynek

In Olsztynek in September, the total precipitation amount is 79 mm (3.1 in), falling over the course of 11 days.

September Precipitation Trends in Olsztynek

The chart displays monthly precipitation patterns in Olsztynek, 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 Olsztynek, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec4545463988701017379653549
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Olsztynek

In Olsztynek in September, humidity is 71%. With an average temperature of 14°C (57°F), this humidity feels like a damp blanket enveloping you, making outdoor activities less enjoyable and encouraging visitors to seek refuge in shaded spots or air-conditioned spaces.

September Average Humidity in Olsztynek

This chart illustrates the average monthly humidity levels in Olsztynek, 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 Olsztynek 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 Olsztynek

In Olsztynek 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 Olsztynek.

Maximum UV Index Levels in Olsztynek for September

The chart shows the monthly maximum UV Index (UVI) for Olsztynek 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 Olsztynek typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124568875321
Data source: Olsztynek 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 Olsztynek Compares to Other Months

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

This table compares monthly weather conditions in Olsztynek, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)45 mm (1.8 inches)92%low
February Weather-1°C (31°F)45 mm (1.8 inches)90%low
March Weather3°C (37°F)46 mm (1.8 inches)87%moderate
April Weather8°C (46°F)39 mm (1.5 inches)76%moderate
May Weather12°C (54°F)88 mm (3.5 inches)58%high
June Weather18°C (65°F)70 mm (2.7 inches)56%very high
July Weather18°C (65°F)101 mm (4.0 inches)59%very high
August Weather18°C (65°F)73 mm (2.9 inches)60%high
September Weather14°C (57°F)79 mm (3.1 inches)71%moderate
October Weather9°C (49°F)65 mm (2.6 inches)86%moderate
November Weather5°C (41°F)35 mm (1.4 inches)90%low
December Weather1°C (34°F)49 mm (1.9 inches)93%low

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