Weather warning for Grand National fans "It will be pretty chilly at the Grand National, reaching about 9C," said Paul Mott, a forecaster at Meteogroup. There will be showers this afternoon with hail mixed in. On Friday night there was light snow over Aberdeenshire and the Highlands leaving maybe a centimetre or two on the ground. Saturday night will be cold and dry, reaching -4C in rural parts of Scotland. It will be zero degrees in the south east and quite a sharp frost will be enough to kill off any flowering plants. On Sunday night temperatures are expected to drop even further with rural parts of south east England expected to see temperatures of -4C to -5C, which are considered cold for this time of year.