Monday’s meeting at Taunton has been abandoned due to a waterlogged track.
A total of 34 millimetres of rain has fallen at the Somerset venue on ground that was already heavy.
The weather has left clerk of the course Michael Trickey with little choice but to call off the meeting as there is no chance of conditions improving sufficiently to race.
Meanwhile, Monday’s meeting at Towcester has been abandoned due to snow, as have today's meeting at Newbury and Doncaster.
Clerk of the course Robert Bellamy was due to inspect the track at 12pm but made a slightly earlier call after the venue saw plenty of overnight snow.
He said: “We are covered in about two inches of snow and have further showers forecast today, possibly totalling another two inches.
“We also have sub-zero temperatures – it is minus 2C at the moment and the wind chill is forecast to be minus 7C tomorrow, so there is no chance of it improving."
Sunday’s meeting at Wincanton will go ahead after the track passed an 8am inspection today.
Clerk of the course Barry Johnson reports the track to be fit for action despite concerns about heavy rain in the region.
He said: “We had 15 millimetres of rain in the last 24 hours and the course has taken it really well.
“We have just showers forecast today and tomorrow now and we are not planning any further inspections.
“However, we will be keeping an eye on the weather as it is snowing at Newbury and while that is not forecast to get as far as us, we will be monitoring the weather.”