The year 2025 was the fourth warmest on record in Belgium, with an average temperature of 12°C, according to a report released by the Royal Meteorological Institute of Belgium (KMI).
The institute said 2025 tied with 2014 in the historical rankings, following 2020 and 2022, which both recorded an average temperature of 12.2°C, and 2023 at 12.1°C. Systematic weather observations in Belgium date back to 1833.
The report noted a sharp decline in rainfall during 2025, following 2024, which was the wettest year ever recorded in the country. Despite the drier conditions, 2025 stood out for several temperature-related milestones.
Among the most notable records was the earliest-ever “summer day” observed in Belgium. A summer day is defined as one in which maximum temperatures exceed 25°C. In 2025, this threshold was reached on 12 April, the earliest date since such measurements began in 1892.
Climate experts say the findings add to growing evidence of long-term warming trends in Belgium and across Europe, with rising temperatures and shifting precipitation patterns increasingly linked to climate change.
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