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September Weather in Rumia, Poland

Last updated: August 27, 2025

In September, the average temperature in Rumia, Poland is a comfortable 15°C (59°F), with minimum temperatures dropping to 6°C (43°F) and maximums reaching up to 28°C (83°F). While you're enjoying the mild climate, be prepared for precipitation averaging 79 mm (3.1 in) over about 12 days, and expect a cozy average humidity of 81%.

September Temperature in Rumia

In September in Rumia, the average temperature is 15°C (59°F). Maximums can reach 28°C (83°F), and minimums can be as low as 6°C (43°F). This mild weather makes it an ideal time for travelers to explore the outdoor attractions and enjoy pleasant strolls.

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

The chart illustrates September temperature patterns in Rumia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rumia, September typically has an average temperature of 15°C (59°F), with highs reaching up to 28°C (83°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec343337445262646559514336
Data source: Temperature data for Rumia 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 Rumia

In Rumia in September, the precipitation amount is 79 mm (3.1 in) over a period of 12 days.

September Precipitation Trends in Rumia

The chart displays monthly precipitation patterns in Rumia, 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 Rumia, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5445523867651047179855663
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rumia

In Rumia in September humidity is 81%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket draped over you, making traveling quite uncomfortable as you constantly wipe away beads of sweat and feel the stickiness clinging to your clothes.

September Average Humidity in Rumia

This chart illustrates the average monthly humidity levels in Rumia, 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 Rumia is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%88%84%77%76%76%76%81%86%89%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rumia

In Rumia 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 Rumia.

Maximum UV Index Levels in Rumia for September

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

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

This table compares monthly weather conditions in Rumia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)54 mm (2.1 inches)89%low
February Weather1°C (34°F)45 mm (1.8 inches)89%low
March Weather3°C (37°F)52 mm (2.0 inches)88%moderate
April Weather7°C (44°F)38 mm (1.5 inches)84%moderate
May Weather11°C (52°F)67 mm (2.6 inches)76%high
June Weather17°C (63°F)65 mm (2.6 inches)76%high
July Weather18°C (65°F)104 mm (4.1 inches)76%high
August Weather18°C (65°F)71 mm (2.8 inches)76%high
September Weather15°C (59°F)79 mm (3.1 inches)81%moderate
October Weather11°C (51°F)85 mm (3.4 inches)86%moderate
November Weather6°C (43°F)56 mm (2.2 inches)89%low
December Weather2°C (36°F)63 mm (2.5 inches)89%low

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