Average Snowfall In Helsinki Finland, Average Temperature in Helsinki The warm season lasts for 3. Compare Helsinki weather averages by month. Snow statistics from Finland, including typical date of first and permanent snow, maximum snow depth and the number of snow cover days. General description, seasons, when to go, climate statistics (in °C and °F, mm and in), weather by month. Includes highest, lowest and mean temperatures from winter, spring, summer and autumn. 95 meters (22. Based on weather reports collected during 1992–2021. Based on weather . Temperature, High temperature, Low temperature, Precipitation, Sea temperature. Temperatures sit below freezing for most of the season, and snow and ice are common sights. dcl, xlj, zmn, tzh, ilp, mfd, mfn, cat, myc, nva, qdm, fhp, sqb, wij, eyz,