Leicester's meeting on Thursday is subject to an 8am precautionary inspection in the morning.
Frost is the main issue at the track, with temperatures set to drop to as low as -5C.
A maximum daytime temperature of 2C on Thursday has also been forecast.
Clerk of the course Jimmy Stevenson said on Wednesday morning: "There's no frost whatsoever this morning - we are perfectly raceable - but there is quite a severe frost forecast tonight.
"If we think we have a chance at 8am, we'll probably call another inspection later in the morning and then, possibly, look again.
"We've got to be patient."