The North's main rice-growing provinces -- South Hwanghae, North Hwanghae, South Pyongan and South Hamgyong -- have been badly damaged by a severe drought, Pyongyang's official Korean Central News Agency (KCNA) reported.
"The worst drought in 100 years continues in the DPRK (North Korea), causing great damage," it said.
The agency said more than 30 per cent of paddy fields across the country were "parching up", with almost no rainfall recorded in South and North Hwanghae provinces.
Last week the South's unification ministry said the North's crop production could fall by as much as 20 per cent from last year if the shortage of rainfall lasts until early July.
North Korea has suffered regular chronic food shortages -- hundreds of thousands are believed to have died during a famine in the mid-to late-1990s -- with the situation exacerbated by floods, droughts and mismanagement.
UN figures show up to 70 per cent of the country remains food insecure and 28 per cent of children under the age of five are stunted.