Photograph: Tony Öhberg/Finland Today

The first snow is forecast to fall in the capital region between the night of Monday and Tuesday. Snow depth of a couple of centimeters is likely, according to the Finnish Meteorological Institute. Daytime temperatures are going to be between 0 and 5 degrees Celsius for most of the week, while nighttime temperatures are going to be a couple of degrees colder.

On Tuesday, the snow area is likely to move to the central parts where as much as 20 centimeters of snow is possible. In Lapland, the temperatures are likely to drop to minus 20 degrees Celsius, and heavy snowfall is possible.

At mid-week, the weather is going to get milder in southern Finland. Plus degrees are likely on Wednesday and Thursday, and any remaining snow is likely to melt away in the Helsinki area.

The weather is getting colder again by the end of the week in the southern parts.