Temperatures will peak at 17 degrees Celsius midweek, while summer speed limits are gradually taking effect across Finland.
Wednesday is expected to be the warmest day of the week, but spring weather is notoriously fickle. On Friday, temperatures will drop by as much as 10 degrees.
Warm then cold
Finland will have relatively warm weather at the start of the week, according to Yle meteorologist Elias Paakkanen.
Monday saw some light rain showers in southern and central parts of the country. In the north, there will also be occasional precipitation, which will partly arrive in the form of snow.
By Tuesday, most showers will clear up, making way for temperatures to rise. That said, Wednesday is forecast to be the warmest day this week, with temperatures possibly reaching 17 degrees Celsius in the south, with the rest of the country also basking in sunny spring weather.
"In Ostrobothnia, temperatures are expected to reach 14 degrees, and in Lapland, 10 degrees may be exceeded," Paakkanen said.
In the south, the weather will continue to be sunny and warm on Thursday, with temperatures in the south possibly reaching 16 degrees. However, areas up north may see a downpour of sleet and snow.
However, a turnaround in the weather is expected on Friday as cold air flows into Finland.
"Temperatures will plummet," Paakkanen said, noting that it could get ten degrees cooler, or even more, across the entire country.
This means that in some parts of southern Finland, it could be 17 degrees on Thursday and only 4 degrees on Friday.
Paakkanen pointed out that these dramatic changes are not unusual, but actually typical for early April.
"The weather is now warmer than usual for this time of year. That's why Friday's cooling temperatures might feel particularly chilly."
Speed limits changing
Summer speed limits are meanwhile gradually coming into force this week, starting on 2 April.
Higher speed limits will initially start in southern areas, with the change gradually affecting northern parts of the country, according to Traficom, the Finnish Transport and Communications Agency.
In Central Finland and North Savo, summer speed limits can take effect starting on 9 April, whereas in North Ostrobothnia and Lapland, motorists will have to wait until 16 April for the change.
Regional authorities can, however, delay the switchover should weather conditions deteriorate, though summer speed limits generally come into effect nationwide by the end of April.
What's special about Finnish driving culture? The All Points North podcast has explored the topic. The episode is available here, on Yle Areena, via Apple, Spotify or wherever you get your podcasts.
