“Even if it were to rain every day until the end of the year, which probably won’t be the case, this number would then increase to 224 days, far behind the record of 1974 (266 days)… .) It is therefore the high number of days (11 in 2024) with abundant precipitation (equal to or greater than 20 millimeters) which explains this record rainfall,” justified the IRM. However, this is not a record, since there were 12 days of heavy rain in 2004.
“There were strong storms in Uccle, especially during the summer, and they contributed greatly to the record,” according to David Dehenauw.
For 2025, as annual variability is high, the Royal Meteorological Institute “does not necessarily” expect more precipitation. 2022, for example, was a very dry year. “It is true that 2001, the wettest year until the record was broken, and 1965, the fourth wettest year, were both followed by a second wet year,” concedes the meteorologist. “But maybe it’s a coincidence.”
With climate change, however, he expects precipitation to increase more in winter than it decreases in summer and more days of extreme precipitation.
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