Meteorologists have confirmed that a new UK maximum temperature record for December was set in the Highlands last month.
A temperature of 18.7C (65.66F) was recorded at Achfary in Sutherland on December 28, making it the hottest day of the month on record in Britain.
The reading was validated following a “rigorous verification process”, the Met Office said.
It beats the previous record of 18.3C (64.94F) which was taken at Achnashellach in the Highlands on December 2 1948.
Following a rigorous verification process, we are now able to confirm that a new December UK maximum #temperature record was set on 28.12.19. Achfary in Sutherland, Scotland reached 18.7 °C, beating the previous record of 18.3C set on 2.12.1948 at Achnashellach (Highland) https://t.co/lwcXiiXx6D
— Met Office (@metoffice) January 9, 2020
The recording has been put down to a meteorological phenomenon known as the Foehn Effect.
This is a change from wet and cold conditions on one side of a mountain to warmer and drier conditions on the other side.
The most notable Foehn events tend to occur across the Highlands, where the moist prevailing westerly winds encounter high ground along Scotland’s west coast.