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September Weather in Siemiatkowo, Poland

Last updated: August 27, 2025

In Siemiatkowo, Poland, the average temperature in September hovers around 14°C (58°F), offering a mild climate. Expect a minimum chill of 2°C (36°F) and occasional highs reaching 31°C (88°F). The month brings about 81 mm (3.2 in) of precipitation spread over 11 days, complementing the average humidity level of 75%. Come prepared for a mix of warm and cool days!

September Temperature in Siemiatkowo

In September, in Siemiatkowo, the average temperature is 14°C (58°F). The maximum can reach 31°C (88°F), while the minimum can be as low as 2°C (36°F). This variation in temperature makes Siemiatkowo a versatile destination for travelers, offering both warm and cool experiences.

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

The chart illustrates September temperature patterns in Siemiatkowo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siemiatkowo, September typically has an average temperature of 14°C (58°F), with highs reaching up to 31°C (88°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec313238465565666658504134
Data source: Temperature data for Siemiatkowo 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 Siemiatkowo

In Siemiatkowo in September, the precipitation amount is 81 mm (3.2 in) over a span of 11 days.

September Precipitation Trends in Siemiatkowo

The chart displays monthly precipitation patterns in Siemiatkowo, 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 Siemiatkowo, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec424642368669897381643347
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Siemiatkowo

In Siemiatkowo in September humidity is 75%. With an average temperature of 14°C (58°F), this humidity feels like a lingering blanket of warmth, making travel both refreshing and a bit stifling, as the moisture in the air may leave you feeling slightly sticky while enjoying outdoor adventures.

September Average Humidity in Siemiatkowo

This chart illustrates the average monthly humidity levels in Siemiatkowo, 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 Siemiatkowo is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%87%79%63%61%63%65%75%85%90%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Siemiatkowo

In Siemiatkowo 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 Siemiatkowo.

Maximum UV Index Levels in Siemiatkowo for September

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

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

This table compares monthly weather conditions in Siemiatkowo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)42 mm (1.6 inches)91%low
February Weather0°C (32°F)46 mm (1.8 inches)90%low
March Weather3°C (38°F)42 mm (1.7 inches)87%moderate
April Weather8°C (47°F)36 mm (1.4 inches)79%moderate
May Weather13°C (55°F)86 mm (3.4 inches)63%high
June Weather19°C (66°F)68 mm (2.7 inches)61%very high
July Weather19°C (66°F)89 mm (3.5 inches)63%very high
August Weather19°C (66°F)73 mm (2.9 inches)65%high
September Weather14°C (58°F)81 mm (3.2 inches)75%moderate
October Weather10°C (50°F)64 mm (2.5 inches)85%moderate
November Weather5°C (41°F)33 mm (1.3 inches)90%low
December Weather1°C (34°F)47 mm (1.9 inches)93%low

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