Winters in Santa Maria Capua Vetere are cool, with temperatures often below freezing from January to March. As the seasons transition into spring, temperatures gradually rise, reaching averages of around 12°C by April and 17°C by May. Summers are warm to hot, with July and August averaging highs above 26°C, while September brings a slight cooling trend. Autumn is mild, with October and November temperatures ranging from 5-27°C, before dropping back down into cool winter conditions.