Colder weather is in store this week, as chillier air flows into Finland from the north. Strong winds are expected on Sunday night and Monday morning, especially on the south coast and archipelago, according to Yle meteorologist Kerttu Kotakorpi.
"The new week starts with quite variable weather. The next 24 hours may include lightning, strong winds and rain as well as sleet and sunshine," she tweeted on Sunday afternoon.
Monday's high temperatures will still be around 10 degrees Celsius, but by Wednesday average readings will fall to between 1 and 5 degrees, she predicted.
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"Meanwhile, the nights are getting colder. Tonight will still be warm, but after that there will be subzero nights and frost," Kotakorpi said.
In terms of precipitation, the next few days will be variable. Several smaller bands of rain are moving across Finland. With temperatures falling, the north may get a little overnight sleet or snowfall.
According to Kotakorpi, the rain fronts will pass quickly, so the sun may shine in between.
Hazardous winds across the south, wild waves at sea
Meanwhile the Finnish Meteorological Institute (FMI) predicts strong winds and high waves, especially along the south coast and in the southern maritime areas early Monday.
On Sunday the FMI issued a warning of strong winds in southwest Finland, Uusimaa, Kymenlaakso and South Karelia from midnight Sunday through Monday afternoon.
Wind gusts may exceed 15 meters per second, potentially knocking down individual trees and causing short power outages. The Åland islands and archipelago may experience gusts of up to 21 metres a second in the early hours of Monday.
"There may also be thunderstorms on the south coast tonight. Winds will calm down by Monday evening," said Kotakorpi.
On southern sea districts, the FMI warns of significant wave height exceeding three meters, which may be dangerous for recreational crafts and small boats. The wild surf will be driven by gale-force winds of 18 meters per second, blowing from the west and southwest after midnight.