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When to go · Belgium

Belgium in September

Great month. Mild, calmer; Heritage Days open private buildings in Brussels and Flanders.

Key facts

Verdict
Great
Crowds
Medium
Belgium
Prices
Medium
Belgium

Verdict

GreatVoykit month rating for Belgium

Mild, calmer; Heritage Days open private buildings in Brussels and Flanders.

Is another month better than September?

No other month rates higher than September for Belgium in this guide.

Weather in September

  • Flanders, Brussels and the coast · 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.

  • Wallonia and the Ardennes · Namur, Dinant, Durbuy, Liège, Bouillonbest weather

    Colder upland winters with some snow; autumn colours in October; hunts close some forest trails from October to December.

  • Flanders: Coastal Flanders · Bruges, Ostend, Knokkebest weather

    Sea wind keeps it cooler in summer and milder in winter; rain any month.

  • Flanders: Inland Flanders · Ghent, Antwerp, Leuven, Limburgbest weather

    April–June and September are the driest and least crowded; July–August is peak.

  • Wallonia: Meuse valley (Namur, Dinant, Liège) · River towns and the Sambrebest weather

    Mild and damp; summer days around 22–25 °C (72–77 °F), winter around 3–6 °C (37–43 °F). Rain is possible in any month.

  • Wallonia: Ardennes (Durbuy, La Roche, Spa) · Hills above about 400 mfine

    Cooler and wetter than the valleys; snow is common in January and February and can close minor roads.

  • Brussels19 °C (66 °F) / 11 °C (52 °F), 13 rain days
  • Aalst20 °C (68 °F) / 11 °C (52 °F), 15 rain days
  • Aarschot20 °C (68 °F) / 12 °C (54 °F), 10 rain days
  • Antwerp20.1 °C (68 °F) / 10.8 °C (51 °F), 10 rain days
  • Arlon18 °C (64 °F) / 9 °C (48 °F), 10 rain days
  • Ath20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Avelgem19 °C (66 °F) / 12 °C (54 °F), 8 rain days
  • Bastogne19 °C (66 °F) / 11 °C (52 °F), 7 rain days
  • Berlare20 °C (68 °F) / 12 °C (54 °F), 8 rain days
  • Beveren20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Binche21 °C (70 °F) / 12 °C (54 °F), 7 rain days
  • Bouillon21 °C (70 °F) / 12 °C (54 °F), 7 rain days
  • Bruges19 °C (66 °F) / 11 °C (52 °F), 11 rain days
  • Cambron-Casteau20 °C (68 °F) / 12 °C (54 °F), 10 rain days
  • Charleroi20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Chimay19 °C (66 °F) / 10 °C (50 °F), 10 rain days
  • Damme19 °C (66 °F) / 11 °C (52 °F), 11 rain days
  • De Haan19 °C (66 °F) / 12 °C (54 °F), 11 rain days
  • Deinze20 °C (68 °F) / 11 °C (52 °F), 11 rain days
  • Dendermonde19 °C (66 °F) / 12 °C (54 °F), 7 rain days
  • Diest19 °C (66 °F) / 11 °C (52 °F), 7 rain days
  • Diksmuide20 °C (68 °F) / 12 °C (54 °F), 8 rain days
  • Dinant19 °C (66 °F) / 10 °C (50 °F), 10 rain days
  • Eeklo19 °C (66 °F) / 12 °C (54 °F), 8 rain days
  • Eupen19 °C (66 °F) / 11 °C (52 °F), 8 rain days
  • Gembloux20 °C (68 °F) / 11 °C (52 °F), 7 rain days
  • Genk19 °C (66 °F) / 11 °C (52 °F), 7 rain days
  • Geraardsbergen19 °C (66 °F) / 11 °C (52 °F), 9 rain days
  • Ghent20 °C (68 °F) / 11 °C (52 °F), 11 rain days
  • Grimbergen20 °C (68 °F) / 11 °C (52 °F), 16 rain days
  • Halen20 °C (68 °F) / 11 °C (52 °F), 15 rain days
  • Hasselt20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Herentals20 °C (68 °F) / 12 °C (54 °F), 7 rain days
  • Hermalle-sous-Huy19 °C (66 °F) / 12 °C (54 °F), 7 rain days
  • Herve20 °C (68 °F) / 12 °C (54 °F), 8 rain days
  • Heuvelland20 °C (68 °F) / 12 °C (54 °F), 10 rain days
  • Huy20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Keerbergen19 °C (66 °F) / 11 °C (52 °F), 7 rain days
  • Kelmis20 °C (68 °F) / 12 °C (54 °F), 8 rain days
  • Knokke-Heist19 °C (66 °F) / 11 °C (52 °F), 7 rain days
  • Koksijde19 °C (66 °F) / 12 °C (54 °F), 11 rain days
  • Kortrijk20 °C (68 °F) / 11 °C (52 °F), 11 rain days
  • Kraainem19 °C (66 °F) / 11 °C (52 °F), 15 rain days
  • La Louvière20 °C (68 °F) / 12 °C (54 °F), 6 rain days
  • La Roche-en-Ardenne21 °C (70 °F) / 12 °C (54 °F), 10 rain days
  • Leuven20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Liège19 °C (66 °F) / 11 °C (52 °F), 10 rain days
  • Lier20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Lochristi21 °C (70 °F) / 12 °C (54 °F), 10 rain days
  • Lokeren20 °C (68 °F) / 12 °C (54 °F), 12 rain days
  • Louvain-la-Neuve20 °C (68 °F) / 11 °C (52 °F), 15 rain days
  • Maasmechelen20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Mechelen20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Mons20 °C (68 °F) / 12 °C (54 °F), 9 rain days
  • Namur19 °C (66 °F) / 10 °C (50 °F), 11 rain days
  • Neerijse20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Neupré19 °C (66 °F) / 12 °C (54 °F), 8 rain days
  • Nieuwpoort19 °C (66 °F) / 12 °C (54 °F), 10 rain days
  • Ostend19 °C (66 °F) / 12 °C (54 °F), 11 rain days
  • Oudenaarde19 °C (66 °F) / 11 °C (52 °F), 8 rain days
  • Poperinge20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Pottes18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Roeselare20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Sint-Martens-Latem19 °C (66 °F) / 12 °C (54 °F), 7 rain days
  • Sint-Niklaas20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Sint-Pieters-Leeuw21 °C (70 °F) / 13 °C (55 °F), 10 rain days
  • Sint-Truiden20 °C (68 °F) / 11 °C (52 °F), 9 rain days
  • Spa19 °C (66 °F) / 11 °C (52 °F), 9 rain days
  • Spiennes22 °C (72 °F) / 12 °C (54 °F), 11 rain days
  • St. Vith21 °C (70 °F) / 12 °C (54 °F), 8 rain days
  • Tervuren20 °C (68 °F) / 11 °C (52 °F), 16 rain days
  • Thuin20 °C (68 °F) / 11 °C (52 °F), 15 rain days
  • Tielt19 °C (66 °F) / 11 °C (52 °F), 9 rain days
  • Tongeren20 °C (68 °F) / 12 °C (54 °F), 14 rain days
  • Tournai20 °C (68 °F) / 11 °C (52 °F), 11 rain days
  • Turnhout20 °C (68 °F) / 12 °C (54 °F), 9 rain days
  • Verviers18 °C (64 °F) / 10 °C (50 °F), 7 rain days
  • Villers-la-Ville20 °C (68 °F) / 12 °C (54 °F), 7 rain days
  • Vilvoorde19 °C (66 °F) / 12 °C (54 °F), 6 rain days
  • Waasmunster20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Waterloo20 °C (68 °F) / 12 °C (54 °F), 9 rain days
  • Welkenraedt18 °C (64 °F) / 10 °C (50 °F), 12 rain days
  • Ypres20 °C (68 °F) / 11 °C (52 °F), 10 rain days
  • Zaventem19 °C (66 °F) / 11 °C (52 °F), 7 rain days
  • Zottegem20 °C (68 °F) / 12 °C (54 °F), 9 rain days
  • Zoutleeuw19 °C (66 °F) / 12 °C (54 °F), 8 rain days

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 · Brussels

    Comic-themed events, giant inflatable characters and stalls around the centre.

Crowds and prices

Crowds · Belgium
Medium
Prices · Belgium
Medium

Compare two months

Weather, crowds and prices for any two months in Belgium, side by side.

  • Verdict

    Sep: Great

    May: Great

  • Crowds

    Sep: Medium

    May: Medium

  • Prices

    Sep: Medium

    May: Medium

  • Festivals listed

    Sep: 1

    May: 4

September: Mild, calmer; Heritage Days open private buildings in Brussels and Flanders.

May: Mild; Brussels Jazz Weekend and outdoor terraces; long weekends fill Bruges.

Belgium: figures are long-term averages from this guide, not a forecast.

What to pack

Nothing unusual for the weather this month.

Build the full packing list for your trip →

Where to go in September

Rated best or good this month

  • Wallonia and the Ardennes

    Best weather of the year (Namur, Dinant, Durbuy, Liège, Bouillon)

  • Brussels

    Mild; good walking.

  • Aalst

    Best months: Apr–Jun, Sep–Oct

  • Aarschot

    Best months: Apr–Oct

  • Antwerp

    Best months: Apr–Jun, Sep–Oct

  • Arlon

    Best months: May–Sep

  • Ath

    Best months: May–Sep; late Aug for the Ducasse

  • Avelgem

    Best months: May–September (warm, good for cycling)

  • Bastogne

    Best months: May–Oct

  • Berlare

    Best months: May–September

  • Beveren

    Best months: May–Sep

  • Binche

    Best months: Feb (Carnival), Apr–Oct for mild weather