Average temperatures, rainfall and packing tips for Brussels, Belgium in September
🌡️ Avg high
20°C
🌙 Avg low
12°C
🌧️ Rainfall
~102 mm
📊 Warmth rank
#3 of 12
September in Brussels at a glance
September in Brussels is typically mild, with average daytime highs around 20°C and nights near 12°C. It is one of the warmer months of Brussels's year.
September is one of the wetter months in Brussels, with around 102 mm of rain - plan around showers.
What to pack for Brussels in September
Medium layers: long sleeves and a sweater
A light-to-medium jacket
A rain jacket or umbrella - this is one of the wetter months
Brussels - year at a glance
HighLow · September highlighted
Is September a good time to visit Brussels?
🧳 September is one of the most comfortable months to visit Brussels - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.
In September, Brussels averages a daytime high of about 20°C and a night-time low of around 12°C, based on recent historical data.
Does it rain in Brussels in September?
September is one of the wetter months in Brussels, with around 102 mm of rain - plan around showers.
Is September a good time to visit Brussels?
September is one of the most comfortable months to visit Brussels - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.