The data - for the week leading up to 10 April - shows that just 60.7% of people who go to the A&E department get seen and discharged within four hours.
However, this is up from 54.6% in the week leading up to 3 April.
A target set by the Scottish Government aims for 95% of patients to be seen and discharged within 12 hours.
Scotland's overall performance for seeing and discharging patients within four hours was at an all-time low at 66.2%.
Dr John Thomson, Vice President of The Royal College of Emergency Medicine Scotland, said: "We are continuing to see severely poor performance in the Emergency Care system.
"Staff are becoming more and more burnt out; the appalling crisis in Emergency Care is seriously distressing.
"The public are extremely worried about these long waiting times, and rightly so, because patients are coming to harm.
"Staff continue doing all they can to deliver care and keep patients safe, but it is incredibly challenging.
"It is a desperate situation, a result of widespread shortages of staff and beds throughout the system and a crisis in social care.
"Despite exiting winter and entering spring, the situation remains dire; we have never faced a crisis worse than this.
"The intense workload is breaking staff, and the distressing circumstances are breaking their morale.
"Patients continue to face seriously long waits, and we continue to state that this crisis is worse than ever, and that patients are coming to harm.
"The government cannot let this deteriorate further, staff and patients urgently need meaningful action now to tackle the desperate situation in Emergency Care and address the widespread staff shortages, the bed shortages, and the social care crisis."
NHS Dumfries and Galloway reported to see 82.1% of their patients within four hours.