Winters in Iasi, Romania are cold and snowy, with temperatures often dropping below freezing from January to March. The coldest months are usually January and February, with averages around -1°C. Spring is a slow and gradual warming period, with temperatures rising steadily from April to June. Summer brings warm weather, with July and August averaging around 23°C, but can be hot and humid at times. Autumn is mild and pleasant, with temperatures cooling down gradually from September to November.