Maps show the dust cloud spreading across from the Sahara through France and on to the UK.
Some areas have seen mild temperatures this weekend, with the mercury lingering around 10C to 13C for much of the country.
However, Met Office warnings are in place for heavy rain over the weekend.
Yellow rain warnings are in place for Central, Tayside and Fife, Grampian, North East England, SW Scotland and Strathclyde until 11pm on Saturday.
