The cold weather will continue through next week, according to Yle metereologist Kerttu Kotakorpi.
"On the eastern border it is already -30 degrees Celsius," says Kotakorpi.
Next week the differences in sub-zero temperatures will vary in different parts of Finland. Currently, it is about -5 degrees Celsius in the west and -30 degrees Celsius in the east. During the weekend, temperatures will range between -15 and -30 degrees Celsius.
Over the weekend it will snow on the west coast and in Lapland.
"There may be up to 10 centimetres of new snow in a relatively short period of time," says Kotakorpi.
Monday will be cold throughout Finland, with temperatures dropping to between -20 and -30 degrees Celsius.
"But, if it is cloudy or it snows, temperatures may only drop to -10 degrees Celsius," says Kotakorpi.
Despite the cold temperatures, there are several sunny days in store.