People should only travel if essential and take extra care on roads and pavements as icy conditions continue, the ambulance service said.
Many West Midlands roads and pavements remain icy after heavy snowfall.
A man was taken to hospital after falling off a sledge at Barr Beacon reservoir, Aldridge.
The man in his 20s suffered a back injury, West Midlands Ambulance Service said.
"The patient was located near the top of a steep slope and ambulance crews had to climb on their hands and knees to reach him," a spokesman said.
He was eventually brought to safety using a 4x4 vehicle before being taken to Sandwell Hospital for further assessment and treatment.
Many transport services have returned to normal and Birmingham Airport, which closed for more than five hours on Friday, has reopened.
However, the airport and several rail and bus companies warned people to expect delays to their journeys.
Midland Metro will be running its normal tram service between Snow Hill station and Wolverhampton, the operator said.
The Met Office warned it would be icy overnight, with a widespread hard frost, especially in sheltered rural areas. Some light snow flurries remained possible.
The minimum temperature was expected to be -3C.
Commuters faced long delays to their journeys home on Friday after the conditions caused widespread disruption to the transport network.
The conditions forced more than 150 schools to close across the West Midlands.