Brussels weather in December 2025

Expect daytime maximum temperatures of 43°F in Brussels, Belgium in December based on long-term weather averages. There are 2 hours of sunshine per day on average with 18 days with some rainfall and typically 3.0 inches of rainfall in the month.

  • 43°F maximum daytime temperature in December in Brussels43
    43°F max day temperature
  • 2 hours of sunshine per day
  • 18 days with some rainfall in December in Brussels18
    18 days with some rainfall
  • 34°F minimum night-time temperature in December in Brussels34
    34°F min night temperature
  • 8 hours of daylight per day in December in Brussels8
    8 hours of daylight per day
  • No heat & humidity in December in Brussels0
    No heat & humidity
  • 3.0 inches monthly rainfall in December in Brussels3.0
    3.0 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Brussels1
    1 (Low) UV index

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The December weather guide for Belgium (Brussels) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How cold is it in Brussels in December?

Daytime temperatures usually reach 43°F in Brussels in December, falling to 34°F at night.

How sunny is it in Brussels in December?

There are normally 2 hours of bright sunshine each day in Brussels in December - that's 19% of daylight hours.

Does it rain in Brussels in December?

There are usually 18 days with some rain in Brussels in December and the average monthly rainfall is 3.0 inches.

Brussels December sunrise & sunset times

Browse the sunrise and sunset times for Brussels in December 2025. Select a month to view Brussels sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 08:23 16:40
Tuesday, 16th December 2025 08:39 16:37
Wednesday, 31st December 2025 08:45 16:47

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