A HOON motorcyclist speeding his way to Sydney would have frozen to death had he not been intercepted by police.

Stunned officers couldn't believe their eyes when they saw the 22-year-old Melbourne man rocket past them on the Hume Freeway outside of the northeast Victorian city of Wangaratta, wearing his best summer clothes.

The apparent temperature had dipped below 6C last night when the Wangaratta Highway Patrol clocked the man travelling 150km/h on the 100km/h section of road.

Decked out in jeans, T-shirt, canvas jacket and a towel around his neck, the man was close to death, a police source said.

Paramedics treated him at the scene for hypothermia but the stubborn speedster refused to be taken to hospital.

Police did, however, take his bike.

The man will be without his wheels for 30 days and is expected to be charged on summons with speeding and riding in a manner dangerous.