Sunday's all-weather Flat fixture at Kempton and the jumps meeting at Musselburgh failed to beat the cold snap and were called off on raceday morning.
An inspection had been arranged for 8am at Kempton following a forecast for heavy snow, and six centimetres fell overnight at the Sunbury track.
Clerk of the course Brian Clifford said: "Sadly, we have had to abandon. The machines we wanted to use this morning kept clogging up, and in the timeframe we had, with it being an afternoon meeting, it would be too big a gamble. It's not just the track, the general areas and infrastructure wouldn't be clear in time."
Musselburgh abandoned due to a frozen track. Temperatures fell to minus 1C overnight and clerk of the course Harriet Graham said: "We were tantalisingly close, but we've still got frozen places and have abandoned.
"Unfortunately it got to minus 1C overnight and we are not due to get warmer temperatures until midday. It is really frustrating."
