This afternoon's meetings at Doncaster and Lingfield will go ahead after the tracks passed morning inspections.
Clerk of the course Roderick Duncan initially called a precautionary inspection for 8am due to the threat of frost overnight, but felt he needed more time before making a final decision and decided to check again at 10am.
Conditions continued to improved through the morning and after inspecting the course for a third time at 11am, along with a delegation of jockeys and trainers, Duncan is happy to give the fixture the go-ahead.
He said: "Temperatures have risen and racing goes ahead."
This afternoon's jumps meeting at Lingfield goes ahead after the track passed a 09.40am inspection.
Clerk of the course Edward Arkell decided to check on conditions after temperatures continued to fall after daybreak, but he has now been able to give the fixture the go-ahead.
Arkell said: "We're all okay and good to go.
"The sun has come out and the temperatures have started to go up.
"We're above freezing now and are looking forward to the afternoon."