Nea Filadelfeia's climate is marked by mild winters, with average temperatures ranging from 0-11°C. Spring brings a gradual warming trend, with temperatures rising to an average of 14°C in April and peaking at 24°C in June. Summer months are hot and dry, with July and August averaging highs around 30-31°C. Autumn is mild, with temperatures cooling down to averages around 17°C by October, before gradually dropping again in winter.