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April Weather in Siennica, Poland

Last updated: August 27, 2025

In April, the average temperature in Siennica, Poland is a cool 9°C (48°F). Expect a chilly minimum of -5°C (23°F) and a pleasantly warm maximum of 27°C (81°F). This month brings about 41 mm (1.6 in) of precipitation over 8 days, contributing to an average humidity of 76%. Stay prepared for a mix of weather!

April Temperature in Siennica

In April in Siennica, the average temperature is 9°C (48°F). The maximum can reach 27°C (81°F), and the minimum can be as low as -5°C (23°F). This range makes it an ideal time for travelers seeking a mix of mild weather and the chance to experience both warm days and cool nights.

April Weather in Siennica: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Siennica, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siennica, April typically has an average temperature of 9°C (48°F), with highs reaching up to 27°C (81°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec313338485768686759504234
Data source: Temperature data for Siennica 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.

April Precipitation in Siennica

In Siennica in April, the total precipitation amount is 41 mm (1.6 in) occurring over the course of 8 days.

April Precipitation Trends in Siennica

The chart displays monthly precipitation patterns in Siennica, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Siennica, April typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec434540418262878673723553
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Siennica

In Siennica in April humidity is 76%. With an average temperature of 9°C (48°F), this humidity feels like a chilly embrace, making outdoor activities feel damp and brisk, potentially leaving you feeling colder than the temperature suggests.

April Average Humidity in Siennica

This chart illustrates the average monthly humidity levels in Siennica, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Siennica is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%76%58%56%56%55%68%84%89%91%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Siennica

In Siennica in April, 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 Siennica.

Maximum UV Index Levels in Siennica for April

The chart shows the monthly maximum UV Index (UVI) for Siennica in April, 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 April, the maximum UV index in Siennica typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578876321
Data source: Siennica April 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 April Weather in Siennica Compares to Other Months

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

This table compares monthly weather conditions in Siennica, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)43 mm (1.7 inches)91%low
February Weather0°C (33°F)45 mm (1.8 inches)89%low
March Weather4°C (39°F)40 mm (1.6 inches)86%moderate
April Weather9°C (48°F)41 mm (1.6 inches)76%moderate
May Weather14°C (57°F)82 mm (3.2 inches)58%high
June Weather20°C (68°F)61 mm (2.4 inches)56%very high
July Weather20°C (68°F)86 mm (3.4 inches)56%very high
August Weather20°C (68°F)86 mm (3.4 inches)55%high
September Weather15°C (59°F)73 mm (2.9 inches)68%high
October Weather10°C (51°F)72 mm (2.8 inches)84%moderate
November Weather5°C (42°F)35 mm (1.4 inches)89%low
December Weather1°C (35°F)53 mm (2.1 inches)91%low

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