The onset of the short-lasting winter heat wave was caused by a jet stream of Saharan dust.

[2] In the capitals of Germany and France, Berlin[3] and Paris, high temperatures of 20 °C (68 °F) were reported.

[4][5] The previous winter heatwave, that affected the United Kingdom in 2019, set a record-breaking day in Aboyne, Scotland, after 122 years at 18.3 °C (64.9 °F) with three other sites exceeding over 20 °C (68 °F).

[7] Among the European cities such as Berlin, and Paris reaching 20 °C (68 °F), the warmer climate of Europe also has seen increase of overall high winter temperature and those were reported in Slovenia at 25.2 °C (77.4 °F), Italy at 25.2 °C (77.4 °F)[8] and Czech Republic at 20 °C (68 °F).

Sweden had set a record high temperature of 16.8 °C (62.2 °F) caused by the foehn wind.