Tallinn experiences a humid continental climate with distinct seasons, though the Baltic Sea moderates temperature extremes throughout the year.

Rainfall is relatively evenly distributed across all months, but autumn tends to be the wettest period, making waterproof layers essential year-round.

Winter temperatures regularly drop below freezing from December through March, while summer highs reach a modest 20-22°C, with occasional warm spells pushing into the mid-20s.

Coastal winds from the Baltic can make temperatures feel considerably colder than the thermometer suggests, particularly during the long winters and transitional months.

The city's medieval Old Town features cobblestone streets that become treacherously icy in winter, making proper footwear with good grip non-negotiable.