The most comfortable time to visit Brussels is from late May to mid September. For walking, go from April to early November. Sunbathing weather is not what it offers.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
Sun is not what Brussels is for: the Sunbathing rating tops out at 24, mostly because it is too cool. The clearest skies come in June, when the sky is typically 53% covered at midday (partly cloudy).
The being outside season here runs from late May to mid September. It peaks in mid July, at 80. The weakest stretch is from November to mid March, when it drops to 0, mostly because it is too cold.
For walking, go from April to early November. It peaks in mid May, at 81. Avoid mid January for this: it falls to 4, mostly because it is too cold.
The year, measured
The average temperature in Brussels over the whole year is 12°C. August is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 3°C. Brussels has no sharply defined rainy season: the chance of rain on a given day runs from 21% in May, the driest month, to 35% in December, the wettest. Winds in Brussels are highest in February, averaging 4.2 m/s (15 km/h), and lightest in September, at 2.7 m/s (10 km/h). The prevailing wind is from the SW. The clearest skies in Brussels come in June, when the sky is typically 52% covered; December is the cloudiest month, at 74%.
Month by month Brussels climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 5°C | 3°C | 0°C | 33% | 74% | 4.0 m/s | 0 | 0 | 8 |
| February | 8°C | 4°C | 2°C | 30% | 66% | 4.2 m/s | 1 | 0 | 21 |
| March | 10°C | 5°C | 5°C | 27% | 61% | 3.8 m/s | 4 | 0 | 38 |
| April | 13°C | 7°C | 9°C | 21% | 53% | 3.3 m/s | 17 | 0 | 62 |
| May | 17°C | 11°C | 14°C | 21% | 53% | 3.1 m/s | 46 | 4 | 78 |
| June | 21°C | 15°C | 19°C | 23% | 52% | 3.1 m/s | 71 | 17 | 66 |
| July | 22°C | 16°C | 20°C | 21% | 53% | 3.0 m/s | 78 | 16 | 66 |
| August | 22°C | 16°C | 21°C | 25% | 53% | 2.8 m/s | 75 | 21 | 62 |
| September | 19°C | 13°C | 17°C | 25% | 53% | 2.7 m/s | 64 | 10 | 74 |
| October | 15°C | 10°C | 12°C | 29% | 63% | 3.3 m/s | 27 | 0 | 76 |
| November | 9°C | 6°C | 5°C | 32% | 67% | 3.5 m/s | 1 | 0 | 39 |
| December | 6°C | 5°C | 2°C | 35% | 74% | 4.0 m/s | 0 | 0 | 16 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Brussels weather by season
Year round, Brussels has days of about 5°C at their warmest in January, its coolest month, and 22°C in August, its warmest; the coolest hours of the day run from 3°C to 16°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around December and least likely around May. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Brussels weather in winterDecember to February
Winter in Brussels has typical daily highs of about 6°C and lows of about 4°C, with a 33% chance of rain on a given day.
Brussels weather in springMarch to May
Spring in Brussels has typical daily highs of about 14°C and lows of about 8°C, with a 23% chance of rain on a given day.
Brussels weather in summerJune to August
Summer in Brussels has typical daily highs of about 22°C and lows of about 16°C, with a 23% chance of rain on a given day.
Brussels weather in autumnSeptember to November
Autumn in Brussels has typical daily highs of about 14°C and lows of about 10°C, with a 29% chance of rain on a given day.
When is the rainy season in Brussels?
Brussels has no sharply defined rainy season: the chance of rain on a given day runs from 21% in May, the driest month, to 35% in December, the wettest.
What time of year is Brussels windiest?
Winds in Brussels are highest in February, averaging 4.2 m/s (15 km/h), and lightest in September, at 2.7 m/s (10 km/h). The prevailing wind is from the SW.
What is the average temperature in Brussels year round?
The average temperature in Brussels over the whole year is 12°C. August is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 3°C.
Where to go instead in early January, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.