räntäjaksoa

Räntäjaksoa refers to a period of sleet in Finnish weather. Sleet is a form of precipitation consisting of ice pellets, often mixed with rain or snow. It typically occurs when temperatures are near freezing point.

During a räntäjaksoa, the air temperature at ground level is usually just above 0 degrees Celsius, while temperatures at higher altitudes are below freezing. This temperature inversion causes snowflakes to melt partially or completely as they fall through a warmer layer of air before refreezing into ice pellets when they reach the colder air near the surface.

The accumulation of sleet can create slippery conditions, making roads and sidewalks hazardous for pedestrians and vehicles. Visibility can also be reduced during heavier sleet events. Räntäjaksoa is a common phenomenon in Finland during the transition seasons, particularly in late autumn and early spring, when weather conditions are variable. The term itself is a compound word, with "räntä" meaning sleet and "jakso" meaning period or phase. This meteorological event is a significant factor for Finns to consider when planning outdoor activities and travel.