The arrival of barnacle geese is one sign of the arriving spring in Helsinki on April 16, 2018. Picture: Tony Öhberg for Finland TodayExpect Hot Temperatures of 20 Degrees Twice This Week Editorial Team 04/16/2018 Weather Click to find out more.Today’s rainclouds in southern Finland will be replaced with clear sky and temperatures of 20 degrees Celsius this week. There’s a heatwave approaching Finland from Europe. The year’s temperature is likely to be broken already on Wednesday and for the second time on Friday. The rain of today and the upcoming fair weather will speed up the melting of snow and the arrival of spring. The grass will become greener and the coltsfoots will start growing. Sources: The Finnish Meteorological Institute, MTV3, Foreca Comments comments GET NOTIFICATIONS OF NEW ARTICLES NameEmailThank you!