September
Wk 37–39
The quietest stretch among this region's best weather weeks: crowd level around 58 out of 100, weather comfort near 72.
- Crowd level
- 55–65
- Comfort
- 68–75
Belgium · Brüssel
Best time to visit Brüssel
When is it busiest here, and when is it quietest? The answer runs week by week through the region's own year, from official EU overnight-stay statistics.
Busiest week
DecemberCrowd level 100
Wk 52 · 171,545 overnight stays
Quietest weeks
JanuaryCrowd level 0–5
Wk 2–4 · measured against the region's own year, not against other regions
Sweet spot
SeptemberCrowd level 55–65
Wk 37–39 · quietest while the weather still holds
Warmest month
20 °CComfort 78
August · around 70 mm of rain in the month
Crowding Index 2.0 · As of 25/08/2026 · Crowding score 0–100, season-relative
Brüssel (Belgium) is quietest in January: across Wk 2–4 the crowd level runs from 0 to 5 out of 100. The busiest single week falls in December (Wk 52), at 100 out of 100 with roughly 171,545 overnight stays. Calculated from open official data; the values are modelled, not counted.
When is Brüssel busy, when is it quiet?
Click a week. The panel on the right explains why it is busy or quiet.
Weather profile
Weather comfort is an absolute scale (0 = poor, 100 = ideal) and a second axis next to the season-relative crowd level.
JanuaryØ 11
FebruaryØ 28
MarchØ 46
AprilØ 67
MayØ 65
JuneØ 68
JulyØ 78
AugustØ 72
SeptemberØ 63
OctoberØ 69
NovemberØ 64
DecemberØ 71
Colour = season-relative crowd levelBar = weather comfort (Sun & warmth), absolute 0–100
Why this week?
September · Wk 37
Crowd level65/100 · moderate
quietbusy
Weather comfort40/100 · Sun & warmth
+4 % versus the region's annual average.
- Contributing months
- September (100 %)
- Overnight stays/week
- 137,887
- School-holiday pressure (source markets)
- 17 % of source markets on school holidays
- Region range
- 76,719–171,545 (avg 132,623)
- Base years
- 2022, 2023, 2024 (excluding 2020, 2021)
v1: Crowd-Score aus der Eurostat-Basisschicht (Übernachtungen), moduliert vom global (ungewichtet) gemittelten Schulferien-Druck der Quellmärkte – der Quellland-Mix liegt für dieses Ziel-Land nicht vor. Season-relativ zur Region. Event-Schichten folgen.
Plan your trip
Pre-filled with the next date in week 37.
DestinationBrüssel
Travel datesPick a week in the calendar
FlightSearch flights (opens in a new tab)
StayFind stays (opens in a new tab)
ActivityExplore activities (opens in a new tab)Ad · commission link
Photos: Johny Goerend · reisetopia · Dino Reichmuth on Unsplash
The travel year in Brüssel, month by month
The year as a table to read and to cite: crowd level for every month, plus weather comfort and temperature from the climate normals.
| Month | Crowd level0–100, season-relative | Weather comfort0–100, profile “mild” | Avg temperature |
|---|---|---|---|
| January | 11 | 19 | 4 °C |
| February | 28 | 23 | 6 °C |
| March | 46 | 33 | 8 °C |
| April | 67 | 50 | 11 °C |
| May | 65 | 68 | 15 °C |
| June | 68 | 77 | 19 °C |
| July | 78 | 79 | 20 °C |
| August | 72 | 78 | 20 °C |
| September | 63 | 73 | 17 °C |
| October | 69 | 56 | 13 °C |
| November | 64 | 34 | 8 °C |
| December | 71 | 22 | 6 °C |
The crowd level is season-relative: 100 is the annual peak of Brüssel itself, not the busiest destination in Europe. The figures say when it is quiet here — not where it is quieter than elsewhere.
Weather comfort 0–100 from the climate normals, profile “mild” – the same profile as the recommendation above, not the selection in the calendar. A “–” means the data for that month is missing.
Index 2.0 · As of 25/08/2026
The windows worth catching
Three windows from the model: first whether the weather suits the region, then how busy it gets.
May–June
Wk 22–24
A second option, also with usable weather: crowd level around 63, weather comfort near 75.
- Crowd level
- 59–66
- Comfort
- 73–76
December
Wk 51–53
The region's peak: crowd level around 80 out of 100. Only if the dates are fixed.
- Crowd level
- 65–100
- Comfort
- 19–22
Brüssel compared with Europe
How full the accommodation is here, measured against Europe – on the only measure on which two travel regions can be compared.
- Bed occupancy in Brüssel
- 42.0
- European median
- 23.1
per cent of bed places, annual mean
per cent of bed places, annual mean
Furthest from the median: December, at 3.1× the value. Closest to the median: August, at 1.1× the value.
Mean across 12 months, weighted by their weeks. This occupancy compares travel regions with one another. The crowding in the table above compares Brüssel with itself. The two measures are never combined.
Climate through the year
Average temperature with day/night range and precipitation across the twelve months.
- Avg temperature
- Day/night range
- Precipitation
| Month | Avg temperature (°C) | Day avg (°C) | Night avg (°C) | Precipitation (mm) |
|---|---|---|---|---|
| Jan | 4 | 4 | 3 | 84 |
| Feb | 5 | 6 | 4 | 68 |
| Mar | 7 | 8 | 6 | 65 |
| Apr | 10 | 11 | 8 | 50 |
| May | 14 | 15 | 12 | 66 |
| Jun | 18 | 19 | 16 | 77 |
| Jul | 19 | 20 | 17 | 69 |
| Aug | 19 | 20 | 18 | 70 |
| Sep | 16 | 17 | 15 | 66 |
| Oct | 12 | 13 | 12 | 77 |
| Nov | 7 | 8 | 7 | 68 |
| Dec | 5 | 6 | 5 | 74 |
The band shows mean daytime to nighttime temperature. Precipitation shown as monthly total (mm). Typical monthly value (climate normal), not a forecast.
How sunny?
How much sun a typical day delivers, month by month, expressed as hours of full midday sun.
Moderately sunny
≈ 3.1 h of full midday sun per day, annual average
Jun
Sunniest month
| Month | ≈ h of full midday sun per day |
|---|---|
| Jan | 0.8 |
| Feb | 1.6 |
| Mar | 2.8 |
| Apr | 4.6 |
| May | 5.3 |
| Jun | 5.6 |
| Jul | 5.3 |
| Aug | 4.6 |
| Sep | 3.4 |
| Oct | 1.9 |
| Nov | 1.0 |
| Dec | 0.6 |
Basis: mean daily solar irradiance in kWh/m²/day; 1 kWh/m² is roughly one hour of full midday sun (1,000 W/m²). Not the same as measured sunshine duration. Typical monthly value (climate normal), not a forecast.
Directly reachable from
Destination airports of Brüssel and every European departure airport with a direct connection to them.
Destination airports
Select a destination airport to see the direct departure airports.
“Directly reachable” means a direct connection exists according to our sources. We do not show a live timetable. Availability and flight days can vary by season and airline.
Frequently asked questions about the best time to visit Brüssel
Short answers on timing, weather and getting there, all from the data on this page.
When is the best time to visit Brüssel?
- The best time to visit Brüssel is September (Wk 37–39): it is the quietest stretch among the region's best weather weeks – crowd level around 58 out of 100, weather comfort about 72 out of 100.
When is Brüssel quietest?
- January (Wk 2–4) is the quietest time in Brüssel. Crowd levels there sit at 0–5 out of 100, the lowest across the year.
When is Brüssel busiest?
- Brüssel is busiest in December (Wk 52) with around 171,545 overnight stays in the peak week.
What is the weather like in Brüssel and when is it warmest?
- It is warmest in Brüssel in August with an average of 20 °C and around 70 mm of rain in the month.
How do you get to Brüssel?
- Brüssel is reachable via the destination airport Brussels Airport (BRU) with direct flights.
Quiet travel windows across Europe, once a month
The Crowd Report names the emptiest weeks of the coming months — for every region, not just this one. Free, unsubscribe any time.
Sources and data vintages
Every provenance note on this page, collected in one place.
- Cover photo
- Photo by Andreas Schmidt on Unsplash
- Cover video
- Video by Gabriela Tsvetanova on Pexels
- Crowding figures
- Index 2.0 · As of 25/08/2026. v1 approximation, calculated from Eurostat overnight stays. Day tourism and cruises (Venice, Dubrovnik …) are still missing, so we show these destinations as quieter than they are. The crowd score is a model-based forecast, not a measurement.
- Climate data
- Generated using Copernicus Climate Change Service information 2025.
- Reachability
Data sources: direct connections from Wikipedia (“Airlines and destinations”, licensed CC BY-SA 4.0, aggregated and modified by us), cross-checked with Eurostat, Destatis and the UK Civil Aviation Authority; airport data from OurAirports (Public Domain). The derived connection data is licensed under CC BY-SA 4.0.
Data as of: September 2026
- Data basis
- All figures are approximations derived from open data (crowd level from Eurostat overnight stays, climate from Copernicus/ERA5-Land), not measurements.