Lingfield and Chelmsford were both abandoned on Saturday, leaving a blank day of racing in Britain and Ireland.
With high-profile jumps meetings at Fairyhouse, Ascot and Haydock already off, along with a further National Hunt card at Newcastle, Lingfield's all-weather fixture was set to be the main attraction.
Temperatures dipped as low as minus 8C at the Surrey circuit this week, and while clerk of the course George Hill declared the track raceable on Friday he did announce a precautionary 7.30am inspection.
That revealed a frozen area on the edge of the racing line and with that in mind a further check took place at 9.30am.
But despite the best attempts of Hill and his team temperatures did not rise quickly enough and were still minus 5C when the decision was taken to abandon.
The track said in a tweet: "Unfortunately despite all the hard work from our grounds team, the weather has defeated our efforts and the track is not safe to race on. Apologies for any inconvenience."
It was a similar story at Chelmsford, where inspections were called for 8.30am and 10.30am. The course reported temperatures not rising significantly and that frozen lumps in the track would not thaw in time after minus 9C and freezing fog overnight.
The Irish Horseracing Regulatory Board has announced that there will be a precautionary inspection at Thurles on Sunday at 7.30am ahead of the fixture scheduled to take place on that day.
Irish Horseracing Regulatory Board Clerk of the Course, Lorcan Wyer, said: "There is still some frost in the ground in places but it is beginning to thaw. The forecast is to turn milder and unsettled with temperatures set to reach 10 to 12 degrees on Sunday. We will have a precautionary inspection at 7.30am tomorrow morning."
There will also be an inspection in Navan at 8am, with IHRB Clerk of the course Paddy Graffin saying, "Following an inspection of the track at Navan this afternoon parts of the track remain unfit for racing.
"However, there is a favourable forecast with temperatures forecast to get up to 6 degrees by race time tomorrow and I would be cautiously optimistic that racing could go ahead tomorrow."
