Villanueva y Geltrú's climate is characterized by mild winters, with temperatures rarely dropping below freezing and often reaching the mid-teens. Spring brings gradual warming, with temperatures rising steadily from around 12°C in March to a warm average of 17°C in May. Summer months are warm to hot, with averages ranging from 24°C in June to 25°C in July and August. Autumn is mild, with temperatures cooling slightly from September's high of 23°C to October's average of 18°C. Winters are generally cool but not cold, with a slight dip in temperature from December's average of 11°C to January's low of 8°C.