Santa Ana's climate is characterized by mild winters, with temperatures ranging from just above freezing in January and December to a relatively warm average of 14°C. Spring brings gradual warming, with April and May averaging around 17°C, while summer months see a slight increase, peaking at 25-26°C in July and August. Autumn is similarly moderate, with September's average temperature being the highest outside of summer, before dropping back down to around 18°C by November.