Midsummer’s Day to be warmest and sunniest of the week, forecaster says

Midsummer’s Day will be the warmest and sunniest day of the week, according to Yle meteorologist Matti Huutonen.

Finland is currently between rain systems, but up to 70 millimetres of precipitation could accumulate in some areas over the week. Forecasts suggest bonfires will be permitted for Midsummer.

Early in the week, northern Finland will see rain, while southern and western regions face a risk of severe thunderstorms. The Finnish Meteorological Institute has issued warnings for intense thunderstorms across much of southern and western Finland, as well as rain alerts for Satakunta and Southwest Finland.

Tuesday brings continued thunderstorm risks in the south and unstable conditions elsewhere. A low-pressure system will linger over northern Finland on Wednesday, while areas south of the Vaasa–Helsinki line may see clearer skies.

Rain will persist on Thursday, though western regions will begin to dry out. By Friday, Midsummer’s Eve, conditions will improve, with weak high pressure arriving from the west, bringing possible sunshine to southern and central Finland.

Saturday, Midsummer’s Day, is expected to be the warmest and sunniest of the week. However, a new rain system will arrive on Sunday.

Southern Finland may see at least 20 millimetres of rain this week, while eastern regions could receive up to 60 millimetres. Temperatures in the north will remain below 15°C, while the south will see around 15°C with rain and up to 20°C in sunny spells. Lapland is currently cooler than usual for this time of year, with typical Midsummer temperatures around 16°C. Southern Finland’s temperatures are normal for the season.

A decision on any forest fire warnings will be announced on Friday at noon.