The Met Office said it will be a windy day throughout the country with outbreaks of rain and drizzle. The rain could become heavier during the afternoon, it added.
Farmers unable to get winter crops in the ground because their land is waterlogged have told shoppers to expect rising food prices in 2013.
Hundreds of flood warnings are in place across England and Wales, with Scotland warned to prepare for heavy rain.
As much of the UK faces flooding and the heavy rain continues, will Christmas be a washout?