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September Weather in Siemiatycze, Poland

Last updated: August 27, 2025

In September, the average temperature in Siemiatycze, Poland reaches a pleasant 14°C (58°F), with a minimum dipping to 1°C (35°F) and a maximum rising to a warm 29°C (84°F). Expect about 68 mm (2.7 in) of precipitation spread over 10 days, contributing to an average humidity level of 72%. Embrace the mild climate as you explore this beautiful destination!

September Temperature in Siemiatycze

In September in Siemiatycze, the average temperature is 14°C (58°F). Maximums can reach 29°C (84°F), while minimums can drop as low as 1°C (35°F). Be sure to pack layers to comfortably enjoy both the warm days and cool nights during your travels.

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

The chart illustrates September temperature patterns in Siemiatycze, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siemiatycze, September typically has an average temperature of 14°C (58°F), with highs reaching up to 29°C (84°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec293137475667676758494133
Data source: Temperature data for Siemiatycze 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 Siemiatycze

In Siemiatycze in September, the precipitation amount is 68 mm (2.7 in) over a span of 10 days.

September Precipitation Trends in Siemiatycze

The chart displays monthly precipitation patterns in Siemiatycze, 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 Siemiatycze, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec434237437377788668673453
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Siemiatycze

In Siemiatycze in September, humidity is 72%. With an average temperature of 14°C (58°F), this humidity feels like a damp blanket wrapping around you, making walking and exploring slightly uncomfortable and requiring frequent breaks for hydration.

September Average Humidity in Siemiatycze

This chart illustrates the average monthly humidity levels in Siemiatycze, 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 Siemiatycze is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%91%88%77%59%59%60%60%72%89%91%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Siemiatycze

In Siemiatycze 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 Siemiatycze.

Maximum UV Index Levels in Siemiatycze for September

The chart shows the monthly maximum UV Index (UVI) for Siemiatycze 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 Siemiatycze typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Siemiatycze 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 Siemiatycze Compares to Other Months

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

This table compares monthly weather conditions in Siemiatycze, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)43 mm (1.7 inches)93%low
February Weather0°C (32°F)42 mm (1.7 inches)90%low
March Weather3°C (38°F)37 mm (1.5 inches)88%moderate
April Weather8°C (47°F)43 mm (1.7 inches)77%moderate
May Weather13°C (56°F)73 mm (2.9 inches)59%high
June Weather19°C (67°F)77 mm (3.0 inches)59%very high
July Weather20°C (68°F)78 mm (3.1 inches)60%very high
August Weather19°C (67°F)86 mm (3.4 inches)60%high
September Weather14°C (58°F)68 mm (2.7 inches)72%moderate
October Weather10°C (50°F)66 mm (2.6 inches)88%moderate
November Weather5°C (41°F)34 mm (1.3 inches)91%low
December Weather1°C (34°F)53 mm (2.1 inches)93%low

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