The lowest daily maximum temperature 0900-0900 for the UK in January is -13.0C 10.1.1982 W Linton, Scottish Borders and for any month is -15.9C 29.12.1995 Fyvie Castle, Aberdeenshire
Still -18C Altnaharra at midday today..but 21hrs for that to change
https://www.metoffice.gov.uk/research/climate/maps-and-data/uk-climate-extremes#?tab=climateExtremes
Still -18C Altnaharra at midday today..but 21hrs for that to change
https://www.metoffice.gov.uk/research/climate/maps-and-data/uk-climate-extremes#?tab=climateExtremes
Comments
12 UTC
Marco, I don't know where the French get the data for that chart from, but Altnaharra is -13.4°C at 12 UTC not -18°C.