🇬🇧 London vs 🇧🇪 Brussels

Temperate oceanic — mild, cloudy, and notoriously changeable year-round

London's weather is famously mild but grey. It rarely gets very hot or very cold, but expect cloud cover most of the year. Summer (June–August) brings the best sunshine and warmth. Rain falls year-round but rarely in heavy bursts.

Brussels sits in a broad valley carved by the Senne river, with the city climbing from the low-lying lower town (~15m elevation) to the upper town and surrounding plateaus (~100m). This topographic split creates distinct microclimates: the lower town is prone to fog, temperature inversions, and trapped humidity, while the higher southeastern districts enjoy better ventilation and slightly cooler summers. The city's extensive parks and forested edges — particularly the Sonian Forest to the southeast — provide significant cooling corridors, but the dense 19th-century urban core generates a pronounced heat island effect.