At 1pm Good Samaritan primary school students took part in the Bust the Dust raindance.

The event was sparked by the tiny St John's Parish School at Trangie, just west of Dubbo.

It's in the heart of a seriously drought-affected swathe of NSW an the students decided to organise their own raindance.

Last month they issued an invitation for other schools in their diocese to take part.

But since then it's grown more than the students could have expected with hundreds of schools across the country joining in the raindance at 1pm on Friday.

Good Samaritan Primary School teacher and Bust the Dust organiser Christine Nunes said all the students from kindergarten to Year 6 were keen to take part.

"St John's Parish School in Trangie put out a call for schools around the nation to stand in solidarity with them because they've been harshly affected by the drought," Ms Nunes said.

"They're not asking for any kind of funds, they just want to know that people out there are thinking of them at this time of need."

The Good Samaritan students sported their Christmas outfits for the day and joined in prayer before dancing up a storm.

"There's a specific song called Raindance which the whole school has learnt," Ms Nunes said.

"But with the dance, Trangie has just said 'dance away'."