Early autumn · Weather & things to do
Brussels in September
Brussels cools off: highs slip to 68°F (20°C), from 74°F in August, with lows of 51°F (10°C) and about 2.2 in (55 mm) of rain.
September opens the best stretch on our comfort score, at 87/100 (the top score of the year).
- Avg high
- 68°F (20°C)
- Avg low
- 51°F (10°C)
- Rain
- 2.2 in (55 mm)
- Humidity
- 79%
- Cloud cover
- 63%
- Daylight
- ~12 h 22 min
- Comfort score
- 87/100 · Great
What September feels like
Highs near 68°F (20°C) make for comfortable sightseeing weather.
Nights cool to an average low of 51°F (10°C).
Rain is moderate at about 2.2 in (55 mm) for the month.
Plan around September
September is one of Brussels's best months on the climate data.
- Opens the best-scoring stretch on our comfort score: May & June and September.
- Last of the best-scoring months: by October, the score drops to 76/100.
- Comfort improves from 78/100 in August to 87/100.
- September sits inside the Apr – Jun, Sep window our Amsterdam to Bruges by Rail route recommends.
What to pack for September
- A warm layer for eveningsnights drop to 51°F
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Brussels in September
September is good outdoor weather here, so these picks lean toward the open air.
Parc du Cinquantenaire
Park with a triumphal arch and museums of art, history and the army.
Why now September scores 87/100 for comfort, good conditions for being outside.
Grand-Place
Square lined with gilded guildhalls and the Gothic town hall.
Why now Highs near 68°F and 2.2 in of monthly rain make this an easy outdoor pick.
Magritte Museum
Large collection of René Magritte's surrealist works.
Maison Dandoy
Biscuit maker since 1829 serving Brussels waffles and speculoos.
Moeder Lambic Fontainas
Beer bar with a long list of Belgian craft and lambic on tap.
Nearby in September
- Ghent in September~31 mi · highs 67°F, 2.2 in rain · similar daytime temperatures, about as wet
- Bruges in September~55 mi · highs 67°F, 2.3 in rain · similar daytime temperatures, about as wet
- Amsterdam in September~107 mi · highs 65°F, 2.8 in rain · 2°C (3°F) cooler by day, wetter
- Reims in September~111 mi · highs 69°F, 1.9 in rain · similar daytime temperatures, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Brussels in September: quick answers
Is September a good time to visit Brussels?
Yes. On the climate data it's one of the best months, scoring 87/100. Expect highs of 68°F (20°C) and 2.2 in (55 mm) of rain. September is inside the Apr – Jun, Sep window our Amsterdam to Bruges by Rail route recommends.
How hot is Brussels in September?
Average highs are 68°F (20°C) and average lows 51°F (10°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Brussels in September?
Not much: about 2.2 in (55 mm) of rain falls across September on average, the 2nd-driest month of the year. The annual total is about 30.0 in (763 mm).
What should I pack for Brussels in September?
Bring a warm layer for evenings (nights drop to 51°F) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Brussels
Routes in season in September
- Amsterdam to Bruges by Rail Apr – Jun, Sep
Planning Brussels in September?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.