It can get as cold as 15 degrees Celsius during nights in the dry season ( April to September ) . In the wet season ( October to March ) the days can be as hot as 33 degrees Celsius . Temperatures do not fluctuate widely throughout the year , though it can range from overnight lows of 15 degrees Celsius in the dry season ( April to September ) to daily highs of 33 degrees Celsius in the wet season ( October to March ) .