Sanlucar de Barrameda's climate is mild, with temperatures rarely extreme. Winters are cool, with occasional drops below freezing in January and February, but averaging around 10-15°C. Spring brings gradual warming, with March often seeing a sudden spike to 29°C. Summer months, from June to September, are hot, with July and August frequently reaching highs above 39°C. Autumn is mild, with temperatures dropping back down to around 14-21°C by November and December.