Overnight rain across Dubbo totalled 5.8mm recorded to 9am on Sunday morning, according to the Bureau of Meteorology (BoM).

That along with a couple of more millimetres post-9am, takes the city's rainfall total for the second last month of the year to 77.4mm, passing the 12.6mm recorded for the entire month of November last year.

Historic records indicate the last time Dubbo passed 80mm or rainfall in November was back in 2011 which recorded 101.6mm.

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November has also surpassed October, which recorded a total of 35.4mm.

The biggest downpour for the month so far was on November 12 with 46mm recorded, and more rain is expected to be on the way.

According to the BoM's seven-day forecast, there's a 90 per cent chance of rain on Wednesday, with between 15mm and 30mm expected to fall.

There's another "very high" chance of a drenching on Thursday, with anywhere between 15mm and 25mm of rain on the cards.

The forecast dries out a touch on Friday, with a 50 per cent chance of rain - with up to 2mm on the radar - but the mercury isn't looking kind either with more humidity on the way.

Friday's maximum temperature is predicted to reach 21 degrees Celsius, the same for Saturday too, while the overnight low will be 9 degrees.

NSW has already experienced wet weather for much of the month with floods threatening around the state.

The Bureau of Meteorology warned of a La Nina event last year, with the bureau's Manager of Climate Operations, Dr Andrew Watkins, predicting above-average winter-spring rainfall for Australia.

The last significant La Nina event was in 2010-11, which was the Australia's wettest two-year period on record beating the previous record from the La Nia years of 1973-74.

The record rain in Dubbo throughout November has been part of a wider soaking for the Central West, with widespread flooding for the region.

Minor to moderate flooding is predicted on the Belubula and Bell rivers at Orange and Molong, while minor flooding is also set to impact parts of the Upper Macintyre, Gwydir, Peel, Castlereagh and Macquarie rivers.

A moderate to major flood warning is still active for the Lachlan River as its height continues to drop slowly after peaking centimetres below the major flood level on Thursday.

Residents in Forbes in the state's central west were evacuated and farmers in the surrounding areas are counting the cost of lost crops.

Meanwhile, two boys were rescued from a flood-affected river in Condobolin on Saturday afternoon.

Emergency services were called after two 11-year-old boys jumped into the Lachlan River, which the bureau has warned could reach a moderate flood level by next weekend.

They were swept 60 metres away by the fast-moving current, made worse by the flood water level, police said.

The boys managed to grab hold of a rope attached to an exposed log in the middle of the river and called out for help from some nearby campers at the local caravan park.

Officers from the Central West Police District attended, along with members of the SES and Rural Fire Service.

The boys yelled out to police that they could not hold on any longer.

With the assistance of a life jacket and a flotation device, Sergeant Hunter swam out to the children and brought both boys back to the riverbank.

The two boys were checked over by Ambulance paramedics before being returned to their parents.

Chief Inspector Peter Atkins, the officer in charge of Orange Police Station, said that he would commend Sergeant Hunter for a bravery award.

"The heroic efforts of Sergeant Hunter in rescuing these two boys in a fast-moving flooded river should be commended," he said.

"If not for the quick-thinking and courageous response from our police, the outcome could have been tragic for the families of these two boys.

"It serves as a timely reminder coming into summer, that people should avoid swimming in flood-affected rivers, as conditions are unpredictable, changeable and often dangerous," said Chief Inspector Atkins.