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May Weather in Bollen, Germany

Last updated: August 23, 2025

In Bollen, Germany, the average temperature in May hovers around 13°C (56°F). While you might experience a refreshing chill with minimum temperatures dropping to 0°C (33°F), the pleasant highs can reach up to 30°C (86°F). Be prepared for some moisture, as 125 mm (4.9 in) of precipitation can be expected over approximately 16 days, accompanied by an average humidity level of 80%.

May Temperature in Bollen

In May, in Bollen, the average temperature is 13°C (56°F). Maximum temperatures can reach 30°C (86°F), while minimums can dip as low as 0°C (33°F). Travelers should be prepared for a wide range of temperatures during this time of year.

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

The chart illustrates May temperature patterns in Bollen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bollen, May typically has an average temperature of 13°C (56°F), with highs reaching up to 30°C (86°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec343843505666686860514237
Data source: Temperature data for Bollen 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.

May Precipitation in Bollen

In Bollen in May, the precipitation amount is 125 mm (4.9 in) spread over 16 days.

May Precipitation Trends in Bollen

The chart displays monthly precipitation patterns in Bollen, 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 Bollen, May typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec11390102581251158577609079150
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Bollen

In Bollen in May humidity is 80%. With average temperature 13°C (56°F) this humidity feels like a damp chill that seeps into your bones, making outdoor exploration more challenging and necessitating layered clothing for comfort.

May Average Humidity in Bollen

This chart illustrates the average monthly humidity levels in Bollen, 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 Bollen is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%89%87%84%80%82%83%80%83%90%89%90%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Bollen

In Bollen in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Bollen.

Maximum UV Index Levels in Bollen for May

The chart shows the monthly maximum UV Index (UVI) for Bollen 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 Bollen typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Bollen 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 Bollen Compares to Other Months

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

This table compares monthly weather conditions in Bollen, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)113 mm (4.4 inches)92%low
February Weather4°C (39°F)90 mm (3.6 inches)89%moderate
March Weather6°C (43°F)102 mm (4.0 inches)87%moderate
April Weather10°C (50°F)58 mm (2.3 inches)84%high
May Weather13°C (56°F)125 mm (4.9 inches)80%very high
June Weather19°C (66°F)115 mm (4.5 inches)82%very high
July Weather20°C (68°F)85 mm (3.4 inches)83%very high
August Weather20°C (68°F)77 mm (3.0 inches)80%very high
September Weather16°C (60°F)60 mm (2.4 inches)83%high
October Weather11°C (52°F)90 mm (3.5 inches)90%moderate
November Weather5°C (42°F)79 mm (3.1 inches)88%low
December Weather3°C (38°F)149 mm (5.9 inches)90%low

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