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September Weather in Serniki, Poland

Last updated: August 27, 2025

In September, the average temperature in Serniki, Poland is a comfortable 15°C (59°F). Expect minimum lows of 1°C (35°F) and maximum highs reaching around 30°C (86°F). During this month, precipitation averages 78 mm (3.1 in) spread over 12 days, while the average humidity lingers at a balmy 70%.

September Temperature in Serniki

In September in Serniki, the average temperature is 15°C (59°F). Maximum temperatures can reach as high as 30°C (86°F), while minimum temperatures can dip down to 1°C (35°F). This range makes Serniki an ideal destination for travelers seeking a mix of mild weather and the opportunity for outdoor activities.

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

The chart illustrates September temperature patterns in Serniki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Serniki, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (86°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec303238485768686759504134
Data source: Temperature data for Serniki 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 Serniki

In Serniki in September, the precipitation amount is 78 mm (3.1 in), occurring over a span of 12 days.

September Precipitation Trends in Serniki

The chart displays monthly precipitation patterns in Serniki, 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 Serniki, September typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec4045404975778710378643653
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Serniki

In Serniki in September, humidity is 70%. With an average temperature of 15°C (59°F), this humidity feels like a warm embrace, making it slightly uncomfortable while traveling, as the moist air clings to your skin and can leave you feeling slightly lethargic.

September Average Humidity in Serniki

This chart illustrates the average monthly humidity levels in Serniki, 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 Serniki is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%88%77%62%61%61%60%70%86%90%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Serniki

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

Maximum UV Index Levels in Serniki for September

The chart shows the monthly maximum UV Index (UVI) for Serniki 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 Serniki typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578876321
Data source: Serniki 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 Serniki Compares to Other Months

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

This table compares monthly weather conditions in Serniki, 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 (33°F)45 mm (1.8 inches)89%low
March Weather3°C (38°F)40 mm (1.6 inches)87%moderate
April Weather9°C (48°F)49 mm (1.9 inches)77%moderate
May Weather14°C (57°F)75 mm (3.0 inches)62%high
June Weather20°C (68°F)77 mm (3.0 inches)61%very high
July Weather20°C (68°F)87 mm (3.4 inches)60%very high
August Weather20°C (68°F)103 mm (4.1 inches)60%high
September Weather15°C (59°F)78 mm (3.1 inches)70%high
October Weather10°C (50°F)64 mm (2.5 inches)86%moderate
November Weather5°C (42°F)36 mm (1.4 inches)90%low
December Weather1°C (34°F)53 mm (2.1 inches)92%low

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