When to go · Brussels
Brussels in September
Good month. Mild; good walking.
Key facts
- Verdict
- Good
- Temperature
- 19°C (66°F)66°F (19°C) / 11°C (52°F)52°F (11°C)
- average high / low
- Rain days
- 13
- Crowds
- Medium
- Belgium overall
- Prices
- Medium
- Belgium overall
Verdict
Mild; good walking.
All twelve months in one grid — weather, crowds and prices, with gaps left as unknown.
Is another month better than September?
September is rated good. These months rate higher:
Weather in September
- BrusselsHighs around 19 °C (66 °F), lows around 11 °C (52 °F), rain on about 13 daysHighs around 66 °F (19 °C), lows around 52 °F (11 °C), rain on about 13 days
- Flanders, Brussels and the coast, Belgium · Bruges, Ghent, Antwerp, Brussels, Ostendfine
Mild, cloudy and damp; summers around 22–25 °C (72–77 °F) with occasional heatwaves. December Christmas markets offset dark afternoons.Mild, cloudy and damp; summers around 72–77 °F (22–25 °C) with occasional heatwaves. December Christmas markets offset dark afternoons.
Autumn season
The Comic Strip Festival and crisp walking weather before the grey sets in.
Watch: Rain days climb back up through November.
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Brussels Comic Strip Festival check
Weekend in September · Centre, near the Comic Strip Center
Comic-themed events, giant inflatable characters and stalls around the centre.
Crowds and prices
- Crowds · Belgium overall
- Medium
- Prices · Belgium overall
- Medium
Belgium overall: Mild, calmer; Heritage Days open private buildings in Brussels and Flanders.
Compare two months
Weather, crowds and prices for any two months in Brussels, side by side.
Verdict
Sep: Good
May: Great (better)
Daytime high
Sep: 19 °C (66 °F)66 °F (19 °C)
May: 18 °C (64 °F)64 °F (18 °C)
Night low
Sep: 11 °C (52 °F)52 °F (11 °C)
May: 9 °C (48 °F)48 °F (9 °C)
Rain days
Sep: 13
May: 13
Crowds
Sep: Medium
May: Medium
Prices
Sep: Medium
May: Medium
Festivals listed
Sep: 1
May: 2
September: Mild; good walking.
May: Mild and green; good month.
Brussels: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings
- A rain jacket or umbrella and shoes that dry fast