Ostroda's winters are harsh and cold, with temperatures often dropping below freezing for most of the month. By March, temperatures begin to rise, bringing an end to the chilliest months. As spring takes hold in April, temperatures start to stabilize around a comfortable range, setting the stage for pleasant summers. June marks the beginning of warm weather, with temperatures regularly reaching above 20°C and sometimes soaring into the high 30s. In autumn, temperatures gradually cool down, returning to more moderate levels by November, before dipping again into winter's chill.