Bahia Blanca experiences mild winters, with temperatures ranging from -4°C in August to 9°C in July. Spring is cool and gradual, warming up from May's average high of 11°C to October's 16°C. Summers are warm to hot, with January and December averaging highs around 22-23°C. Autumn brings a slight drop in temperature, but still mild, with September's average high at 13°C.