Drought conditions have worsened in NSW, with more than 70 per cent of the state now officially drought-declared.

Figures released by the NSW Department of Primary Industries on Saturday show just 10.8 per cent of the state, mostly on the eastern coastline, has enjoyed normal rainfall, and was rated as "satisfactory" in September.

Another isolated region in the west around Bourke ha also escaped the drought.

A further 17.6 per cent of the state is rated as marginal - in the Hunter and around Tamworth plus regions including Wilcannia and Walgett - while the remaining 71.6 per cent of the state is now officially in drought.

Primary Industries Minister Ian Macdonald said the drought figure had increased from 66.2 per cent of the state in the previous month.