Lisbon's weather is mild and temperate, with moderate temperatures throughout the year. Winters are cool, but not cold, with average highs ranging from 10°C in January to 13°C in February and December. Spring brings gradual warming, with temperatures rising to 16°C in April and 17°C in May. Summers are warm, with July and August often reaching highs of up to 38°C, although the heat is tempered by sea breezes. Autumn sees a return to cooler temperatures, with averages dipping back down to around 14°C in November.