This is the thermograph from Loch Glascarnoch for last night. Even with just over 6 hours of darkness at this time of the year it could still manage a minimum of -3.0°C, some pinch.
Pinch of frost - another euphemism that I picked up from the Darren Bett yesterday, along with the use of the word "zone" that seems to have replaced "parts" or "area" with Lucy Verasamy.