When to go · Brussels, Belgium
Best time to visit Brussels
The sweet spot is July, August and June — averages 20°C, 11 rainy days, peak-season crowds and peak prices.
May–September is mildest; the Belgian GP runs in late summer. Spring blossoms and Christmas markets are highlights; winters are grey and damp.
Cool maritime: mild summers (18–23°C), chilly damp winters (2–7°C), rain possible year-round — the Ardennes are wetter still.
The short answer
20°C · 11 rainy days · high season
20°C · 11 rainy days · high season
18°C · 11 rainy days · high season
Hardest months: January and December. averages a raw 4°C, 12 rainy days, few other visitors.
Month by month
| Month | Avg temp | Rain days | Crowds | Verdict |
|---|---|---|---|---|
| January | 4°C | 12d | low | Wet |
| February | 5°C | 10d | low | Cold |
| March | 8°C | 11d | mid | Chilly |
| April | 11°C | 10d | mid | Chilly |
| May | 15°C | 11d | high | Mild |
| June | 18°C | 11d | high | Comfortable but damp |
| July | 20°C | 11d | high | Comfortable but damp |
| August | 20°C | 11d | high | Comfortable but damp |
| September | 16°C | 10d | high | Comfortable but damp |
| October | 12°C | 12d | mid | Wet |
| November | 7°C | 13d | low | Wet |
| December | 4°C | 13d | mid | Wet |
Verdicts are read off the three columns to their left — temperature distance from 21°C first, then rainfall, with crowds breaking ties. Averages, so any given week can differ.
If you'd rather go cheap than perfect
January, February and November are low season in Brussels — thinner crowds, and the months where accommodation is easiest to book late. Budget travellers already work to about $55–110 a day here; low season is where the accommodation share of that goes furthest.
Book the month you picked
Fares move with the same seasons as the crowds — the quiet months above are usually the cheap ones to fly.