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May Weather in Sint-Jan, Belgium

Last updated: August 22, 2025

In May, the average temperature in Sint-Jan, Belgium hovers around 13°C (57°F). Temperatures can range from a chilly 1°C (34°F) to a warm 28°C (83°F). Expect around 61 mm (2.4 in) of precipitation spread over 11 days, contributing to an average humidity level of 82%.

May Temperature in Sint-Jan

In May in Sint-Jan, the average temperature is 13°C (57°F), with maximums reaching up to 28°C (83°F) and minimums dropping as low as 1°C (34°F). Therefore, it’s advisable to pack layers to comfortably adapt to the range of temperatures during your travels.

May Weather in Sint-Jan: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Sint-Jan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sint-Jan, May typically has an average temperature of 13°C (57°F), with highs reaching up to 28°C (83°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec404346505664666660554643
Data source: Temperature data for Sint-Jan 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 Sint-Jan

In Sint-Jan in May, the total precipitation amount is 61 mm (2.4 in) over the course of 11 days.

May Precipitation Trends in Sint-Jan

The chart displays monthly precipitation patterns in Sint-Jan, 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 Sint-Jan, May typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec655964366160507151825695
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Sint-Jan

In Sint-Jan in May, humidity is 82%. With an average temperature of 13°C (57°F), this humidity feels like a damp chill, making it important for travelers to dress in layers to stay comfortable while exploring the area.

May Average Humidity in Sint-Jan

This chart illustrates the average monthly humidity levels in Sint-Jan, 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 Sint-Jan is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%85%82%82%80%76%82%89%92%92%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Sint-Jan

In Sint-Jan 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 Sint-Jan.

Maximum UV Index Levels in Sint-Jan for May

The chart shows the monthly maximum UV Index (UVI) for Sint-Jan 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 Sint-Jan typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Sint-Jan 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 Sint-Jan Compares to Other Months

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

This table compares monthly weather conditions in Sint-Jan, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)65 mm (2.6 inches)91%low
February Weather6°C (43°F)59 mm (2.3 inches)89%low
March Weather8°C (46°F)64 mm (2.5 inches)87%moderate
April Weather10°C (51°F)36 mm (1.4 inches)85%moderate
May Weather13°C (57°F)61 mm (2.4 inches)82%high
June Weather18°C (64°F)60 mm (2.4 inches)82%very high
July Weather19°C (66°F)50 mm (2.0 inches)80%very high
August Weather19°C (66°F)71 mm (2.8 inches)76%high
September Weather16°C (61°F)51 mm (2.0 inches)82%moderate
October Weather13°C (55°F)82 mm (3.2 inches)89%moderate
November Weather8°C (47°F)56 mm (2.2 inches)92%low
December Weather6°C (43°F)95 mm (3.8 inches)92%low

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