According to Yle meteorologist Joonas Koskela, bitterly cold air from Siberia is expected to head west, bringing down the current chilly temperatures in southern and central Finland even lower.
"At night, it could go down to 20-30 below zero, and in some places even colder. Wednesday night (of next week) seems to be the coldest it will get," Koskela said.
Next week, temperatures in southern and central areas are expected to range between -10 to -20 degrees during the day, with clear skies, he said, adding that wind chill will make it seem even colder. Lapland, on the other hand, is expected to be a little milder.
According to the Finnish Meteorological Institute, temperatures that dip below -20 degrees in southern Finland this time of year are relatively rare. For example, in February 2017 the lowest recorded temperature in Helsinki was -13.7 degrees Celsius.