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January Weather in Saint-Denis, Belgium

Last updated: August 22, 2025

In January, the average temperature in Saint-Denis, Belgium hovers around 4°C (39°F). However, temperatures can dip to a chilly -7°C (20°F) or peak at a mild 13°C (57°F). Expect an average precipitation of 67 mm (2.6 in) over 12 days, along with a notable average humidity level of 91%.

January Temperature in Saint-Denis

In January in Saint-Denis, the average temperature is 4°C (39°F), with maximums reaching 13°C (57°F) and minimums dropping as low as -7°C (20°F). Be prepared for chilly weather and pack accordingly for your trip!

January Weather in Saint-Denis: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Saint-Denis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint-Denis, January typically has an average temperature of 4°C (39°F), with highs reaching up to 13°C (57°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec394145505664666660544542
Data source: Temperature data for Saint-Denis 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.

January Precipitation in Saint-Denis

In Saint-Denis in January, the precipitation amount is 67 mm (2.6 in) distributed over 12 days.

January Precipitation Trends in Saint-Denis

The chart displays monthly precipitation patterns in Saint-Denis, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Saint-Denis, January typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec6772743961606579537860101
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Saint-Denis

In Saint-Denis in January, humidity is 91%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and forcing travelers to bundle up tightly against the cold, sticky air.

January Average Humidity in Saint-Denis

This chart illustrates the average monthly humidity levels in Saint-Denis, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Saint-Denis is approximately 91%, 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 January generated using information from the Copernicus Climate Change Service.

January UV Index in Saint-Denis

In Saint-Denis in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Saint-Denis, you can visit Hourly UV Index in Saint-Denis.

Maximum UV Index Levels in Saint-Denis for January

The chart shows the monthly maximum UV Index (UVI) for Saint-Denis in January, 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 January, the maximum UV index in Saint-Denis typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec224578875421
Data source: Saint-Denis January 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 January Weather in Saint-Denis Compares to Other Months

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

This table compares monthly weather conditions in Saint-Denis, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)67 mm (2.6 inches)91%low
February Weather5°C (42°F)72 mm (2.9 inches)89%low
March Weather7°C (45°F)74 mm (2.9 inches)87%moderate
April Weather10°C (50°F)39 mm (1.5 inches)85%moderate
May Weather13°C (56°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)65 mm (2.6 inches)80%very high
August Weather19°C (66°F)79 mm (3.1 inches)76%high
September Weather15°C (60°F)53 mm (2.1 inches)82%moderate
October Weather12°C (54°F)78 mm (3.1 inches)89%moderate
November Weather7°C (45°F)60 mm (2.4 inches)92%low
December Weather5°C (42°F)100 mm (4.0 inches)92%low

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