Central Beacons Mountain Rescue Team were called out at 04:10am on Wednesday morning to assist a wild camper who had faced testing weather conditions on Pen y Fan.
The 20-year old male intended to stay the night on the peak, but dialled 999 when facing diffcult weather conditions.
Central Beacons Rescue Team called on the help of Brecon Mountain Rescue Team as both teams headed up Pen y Fan.
The man was assessed by an MR paramedic and treated for hypothermia before being helped off the hill.
His equipment was also recovered off the hill by team members.
The man was then returned to family members.
A spokesperson for Central Beacons Mountain Rescue Team has said: "With the current weather alert in place much of the tops are in winter conditions so please ensure you are suitably prepared, experienced and equipped for your trip.
"The adverse weather is also affecting road conditions, some team members when returning home came across a 2 vehicle RTC with persons injured, so available resources were directed to that in order to provide medical assistance and scene management whilst the statutory services were alerted and responded.
"Take care when driving across exposed mountain roads."