Parts of PNG has been battling flooding in recent weeks but there is still a need for relief in the wake of the drought, which lasted until March after beginning almost a year ago in some areas.
The UN's resident co-ordinator in PNG, Roy Trivedy, said data appears to show thousands still face food security issues.
He said with help from other organisations like the World Food Program and UNICEF, they would shortly start delivering food and nutrition supplies, mostly in the Highlands but also to parts of Milne Bay.