Christmas eve barbecue around the swimming pool? New Year's day sunning and surfing at the beach? They say a change is as good as a holiday and Brisbane certainly offers you that with its sub-tropical climate. Winter, if you could call it that, is July/August. Mid-day temperatures hover around 20C (68F). Nights get down to around 10C (50F). Summer highs (January/February) average around 30C (86F). Summer nights are typically sub-tropical with evenings averaging around 20C (68F).