Brussels, February 19, 2025 – After weeks of freezing conditions, Belgium is set to experience an abrupt shift in weather, with temperatures soaring to near 20°C by the end of the week.
The Royal Meteorological Institute (RMI) has forecast an exceptionally mild Friday, marking a stark contrast to the bitter cold that has gripped the country in recent weeks.
At the start of the week, Belgium recorded its coldest night of the winter, with temperatures plummeting to -15.6°C in Elsenborn, East Cantons.
However, a dramatic warm-up is expected, with highs reaching between 12°C in the High Fens and up to 18-19°C in the Kempen by Friday. The sudden rise is accompanied by strong southerly winds, which could reach speeds of up to 60 km per hour.
“These temperatures are highly unusual for this time of year,” the RMI stated, adding that while the skies will remain overcast, the warmth will be a significant departure from recent icy conditions.
Gradual Rise in Temperatures
The warming trend will be noticeable throughout the week. Wednesday is expected to be mostly cloudy with a high of 8°C in central Belgium, while Thursday will bring slightly milder temperatures of up to 14°C, alongside occasional light rain.
By the weekend, daytime temperatures are forecast to hover around 13-14°C, maintaining the unseasonably warm conditions.
Meteorologists attribute this sudden warmth to a shift in wind patterns, drawing milder air from the south. While the brief respite from the cold is welcomed by many, experts warn that the unusual warmth may also have some adverse effects.
Hay Fever Alert as Pollen Levels Rise
The rising temperatures and recent sunny weather have led to an early bloom of certain trees, triggering concerns over a spike in hay fever cases.
Weather service Meteovista has cautioned that the risk of hay fever will increase significantly in the coming days, as alders and hazels begin to release pollen.
“Due to the recent sunshine and the expected milder weather, more and more alders are coming into bloom,” said Rico Schröder, meteorologist at Meteovista.
“Hazels are also beginning to flower, and the combination of dry conditions and a southerly current will bring additional pollen from France.”
For Belgians who suffer from allergies, this could mean an early onset of hay fever symptoms, including sneezing, itchy eyes, and respiratory discomfort.
Experts advise those allergic to alder and hazel pollen to take precautions, such as limiting outdoor activities and keeping windows closed during peak pollen times.
Unusual Winter Weather Patterns
Belgium’s sudden transition from deep winter cold to near-spring temperatures reflects the increasingly unpredictable nature of European weather patterns.
Climate experts suggest that such extreme fluctuations are becoming more frequent due to climate change, with cold spells and heatwaves occurring closer together.
While the milder conditions may bring short-term relief from winter’s harshness, meteorologists warn that they could also lead to unpredictable weather shifts in the weeks ahead.
For now, Belgians can prepare for a warm end to the week—but not without the added challenge of rising pollen levels.
