nomadseason

May Weather in Siennica, Poland

Last updated: August 27, 2025

In May, the average temperature in Siennica, Poland hovers around 14°C (57°F). Expect a minimum of -3°C (27°F) and a maximum of 30°C (85°F). During this month, precipitation totals 82 mm (3.2 in) over about 12 days, paired with an average humidity of 58%.

May Temperature in Siennica

In May in Siennica, the average temperature is 14°C (57°F). Maximums can reach 30°C (85°F), and minimums can drop as low as -3°C (27°F). Be prepared for a diverse range of weather conditions if you plan to travel during this time.

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

The chart illustrates May 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, May typically has an average temperature of 14°C (57°F), with highs reaching up to 30°C (85°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec313338485768686759504234
Data source: Temperature data for Siennica generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Siennica

In Siennica in May, the precipitation amount is 82 mm (3.2 in) occurring over a span of 12 days.

May Precipitation Trends in Siennica

The chart displays monthly precipitation patterns in Siennica, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Siennica, May typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec434540418262878673723553
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Siennica

In Siennica in May humidity is 58%. With an average temperature of 14°C (57°F), this humidity feels like a refreshing embrace, making it comfortable for traveling as long as you stay hydrated and wear breathable clothing.

May Average Humidity in Siennica

This chart illustrates the average monthly humidity levels in Siennica, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Siennica is approximately 58%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Siennica

In Siennica in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Siennica.

Maximum UV Index Levels in Siennica for May

The chart shows the monthly maximum UV Index (UVI) for Siennica in May, 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 May, the maximum UV index in Siennica typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578876321
Data source: Siennica May 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 May 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 May’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 May’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

Compare Siennica's Climate with Cities Worldwide