Wydean School of Caldicot says the sixth formers raised £500 for the city centre charity stunt and spent 2 weeks rehearsing in their lunch times. The schools says they also raised a further £1,000 last month for another homeless charity when they held an overnight sleep-out in freezing conditions.
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Showers expected throughout the day especially in the north. Drier and brighter elsewhere but cooler than in recent days.
Most places will become dry overnight, although it will remain generally cloudy with patches of hill fog.
Police have told people in Pontypridd that the cordon around the rugby club could be in place until next week.