The Bureau of Meteorology (BoM) collected 0.6 millimetres (mm) of rainfall in Nyngan on Sunday.

This winter is predicted to be so warm and dry that there's at least a 80 per cent chance that the Central West will not exceed the median maximum temperature during winter.

In Nyngan, according to the BoM three month outlook, it is expected to reach a maximum average temperature of 18 degrees, and an average minimum temperature of 4.9 degrees from June through to August.

The BoM climate outlook for winter paints a grim picture for anyone hoping for good rainfall during the next three months.

It is expected that Nyngan will receive an average of 89 mm of rainfall for the three months from June through to August, with a high chance it will not exceed this average.

BoM's manager of long-range forecasting Dr Andrew Watkins said the warm, dry conditions experienced in autumn will continue into winter.

"We're looking at drier than average conditions, [and] fairly high odds of getting below average rainfall," he said.

"Warmer than average days, pretty much right over the country, with odds greater than 80 per cent.

"But, in terms of nighttime temperatures, looking a little bit more towards average in the interior of the continent."

Dr Watkins said there were two competing drivers behind the weather conditions.

"We're fairly close to El Nino conditions at the moment, not quite hitting the threshold but we are fairly close, that's forecast to ease away over the coming months," he said.

"It will be replaced by a positive Indian Ocean dipole which is a pattern that produces warmer and drier conditions."

Recent very cold conditions from an "Antarctic blast" bringing up snow and cold conditions are set to ease.