Weather in België in september
Country-wide climate normals across 15 cities in België.
How Hot Is België in september?
Uniform warmth covers België in September: highs near 20°C across all cities.
Sunshine in België in september
België's September brings mixed skies — Brussels averages 3.6h of sun, with similar conditions nationwide. Cloudy periods alternate with sunny stretches, and the sun is up between 7:20 am and 7:55 pm. Plan for variability rather than guaranteed sunshine.
Does It Rain In België In september?
Typical September rainfall covers België: about 70mm in Brussels across 12 days, with wetter conditions in coastal regions and drier conditions inland. Expect showers about half the days, but extended dry stretches between them. The pattern is variable but predictable.
Is België Humid In september?
Mugginess defines België's September: humidity averages 73% in Brussels, and the air feels noticeably heavy across most regions. Sweat sits on the skin longer than it would in drier conditions, and overnight relief is limited. Pack light, breathable fabrics.
Wind In België In september
Gentle steady winds define België's September: Brussels averages 18 kph, with conditions consistent across most regions. The breeze keeps warm days bearable without being a nuisance.
Cloud Cover In België In september
Cloudy skies dominate België in September — 61% cover in Brussels, with similar overcast conditions in most regions. Direct sun is patchy and broken; expect grey stretches between brief bright moments. Coastal areas may be heavier than inland.