January weather forecast
Brussels, Belgium

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A beautiful slope garden with several museums, in the city of Brussels, Belgium
A beautiful slope garden with several museums, in the city of Brussels, Belgium

Weather in January

In comparison to the following period, January in Brussels, Belgium experiences markedly cool temperatures with a high average of only 5.7°C (42.3°F) and a cold average low of 0.7°C (33.3°F). Winter jackets are a must-have for the city's inhabitants during this time, with most days being cold and very likely cloudy. Sunshine is rarely seen, with an average of only 1.9 hours per day. Be mindful of possible snowfall days, as there's an average of 5.2 such days this month. Entering the New Year in Brussels requires resilience to the cold, humidity, and scarce daylight.

Temperature

Brussels witnesses the coldest weather in January, with temperatures averaging a high of 5.7°C (42.3°F) and a low of 0.7°C (33.3°F).

Humidity

In January, the average relative humidity is 86.6%.

Rainfall

In Brussels, during January, the rain falls for 19.2 days and regularly aggregates up to 76mm (2.99") of precipitation. In Brussels, during the entire year, the rain falls for 199.6 days and collects up to 853mm (33.58") of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Brussels, during January, snow falls for 5.2 days. In Brussels, during the entire year, snow falls for 23.7 days.

Daylight

The average length of the day in January is 8h and 32min.
On the first day of January, sunrise is at 08:44 and sunset at 16:46. On the last day of the month, sunrise is at 08:20 and sunset at 17:31 CET.

Sunshine

The average sunshine in January is 1.9h.

UV index

The months with the lowest UV index in Brussels are January, February, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 1 during January translates into the following guidance:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.

Frequently asked questions

What is the coldest time of year?

January stands out as Brussels's coldest month, with temperatures ranging between an average high of 5.7°C (42.3°F) and a low of 0.7°C (33.3°F).

How cold does it get in January?

Brussels in January has an average high-temperature of 5.7°C (42.3°F) and an average low-temperature of 0.7°C (33.3°F).

What is the average humidity in January?

The average relative humidity in January is 86.6%.

How many days does it rain in January?

In Brussels, in January, it is raining for 19.2 days, with typically 76mm (2.99") of accumulated precipitation.

How many days does it snow in January?

In January, snow falls for 5.2 days.

How many hours of daylight does Brussels have in January?

In Brussels, the average day length in January is 8h and 32min.

What time are sunrise and sunset in January?

On the first day of January, sunrise is at 08:44 and sunset at 16:46. On the last day of the month, sunrise is at 08:20 and sunset at 17:31 CET.

How long on average sun shines in January?

In Brussels, the average sunshine duration in January is 1.9h.

What are the months with the lowest UV index?

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index reading in January in Brussels?

In Brussels, the average daily maximum UV index in January is 1. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average UV index

Average temperature in January
Brussels, Belgium

Average temperature in January - Brussels, Belgium
  • Average high temperature in January: 5.7°C

The warmest month (with the highest average high temperature) is July (23°C).
The month with the lowest average high temperature is January (5.7°C).

  • Average low temperature in January: 0.7°C

The month with the highest average low temperature is July (14°C).
The coldest months (with the lowest average low temperature) are January and February (0.7°C).

Average humidity in January
Brussels, Belgium

Average humidity in January - Brussels, Belgium
  • Average humidity in January: 86.6%

The month with the highest relative humidity is December (88.8%).
The month with the lowest relative humidity is April (72.5%).

Average rainfall in January
Brussels, Belgium

Average rainfall in January - Brussels, Belgium
  • Average rainfall in January: 76.1mm

The wettest month (with the highest rainfall) is December (81mm).
The driest month (with the least rainfall) is April (51.3mm).

Average rainfall days in January
Brussels, Belgium

Average rainfall days in January - Brussels, Belgium
  • Average rainfall days in January: 19.2 days

The month with the highest number of rainy days is December (19.3 days).
The month with the least rainy days is July (14.3 days).

Average snowfall days in January
Brussels, Belgium

Average snowfall days in January - Brussels, Belgium
  • Average snowfall days in January: 5.2 days

The month with the highest number of snowfall days is February (5.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in January /
Average sunshine in January
Brussels, Belgium

Average daylight in January / Average sunshine in January - Brussels, Belgium
  • Average daylight in January: 8h and 3min

The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 0min).

  • Average sunshine in January: 1h and 5min

The month with the most sunshine is July (Average sunshine: 6h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 30min).

Average UV index in January
Brussels, Belgium

Average UV index in January - Brussels, Belgium
  • Average UV index in January: 1

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 1).

Brussels, Belgium

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