September Weather in Slupsk, Poland

Last updated: August 27, 2025

In September, the average temperature in Slupsk, Poland is a mild 15°C (60°F). Expect a minimum of 7°C (45°F) and a maximum soaring to 28°C (83°F). Humidity levels are typically high at 81%, and with 91 mm (3.6 in) of precipitation spread over 16 days, be prepared for some wet spells!

September Temperature in Slupsk

In September in Slupsk, the average temperature is 15°C (60°F), with maximums reaching 28°C (83°F) and minimums dipping as low as 7°C (45°F). This makes it a pleasant time to explore the outdoors while being prepared for varying temperatures throughout the day.

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

The chart illustrates September temperature patterns in Slupsk, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Slupsk, September typically has an average temperature of 15°C (60°F), with highs reaching up to 28°C (83°F) and lows dropping to around 7°C (45°F).

Data source: Temperature data for Slupsk generated using information from the Copernicus Climate Change Service.

September Precipitation in Slupsk

In Slupsk in September, the total precipitation amount is 91 mm (3.6 in) spread over 16 days.

September Precipitation Trends in Slupsk

The chart displays monthly precipitation patterns in Slupsk, 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 Slupsk, September typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 16 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Slupsk

In Slupsk in September, humidity is 81%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sluggish and draining, which can challenge even the best-prepared traveler.

September Average Humidity in Slupsk

This chart illustrates the average monthly humidity levels in Slupsk, 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 Slupsk is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Slupsk

In Slupsk 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 Slupsk.

Maximum UV Index Levels in Slupsk for September

The chart shows the monthly maximum UV Index (UVI) for Slupsk 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 Slupsk typically reaches 5, which falls under the moderate exposure category.

Data source: Slupsk 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 Slupsk Compares to Other Months

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

This table compares monthly weather conditions in Slupsk, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	66 mm (2.6 inches)	87%	low
February Weather	2°C (35°F)	56 mm (2.2 inches)	87%	low
March Weather	3°C (38°F)	59 mm (2.3 inches)	87%	moderate
April Weather	7°C (44°F)	36 mm (1.4 inches)	85%	moderate
May Weather	11°C (52°F)	55 mm (2.2 inches)	81%	high
June Weather	17°C (63°F)	47 mm (1.8 inches)	81%	high
July Weather	18°C (65°F)	106 mm (4.2 inches)	81%	high
August Weather	19°C (66°F)	70 mm (2.8 inches)	80%	high
September Weather	15°C (60°F)	91 mm (3.6 inches)	81%	moderate
October Weather	11°C (52°F)	114 mm (4.5 inches)	84%	moderate
November Weather	7°C (44°F)	76 mm (3.0 inches)	86%	low
December Weather	3°C (37°F)	70 mm (2.8 inches)	85%	low