It was exactly -20°C at the Icelandic Met Office weather station at Sandbúðir in inland South-East Iceland early this morning.
It is currently -9°C in the capital Reykjavik, where temperatures will struggle to exceed -4°C at their very warmest today.
Residents of Akureyri awoke to temperatures of -10°C and a blanket of white, after heavy snowfall yesterday evening.
Practically the entire country will be experiencing freezing temperatures all day.
This same arctic plunge is now heading for the UK and Western Europe.
Thanks to J.H. Walker for this link