A weather warning has been issued for the region today, with heavy fog set to sweep into some parts of Devon, Cornwall and Somerset.
The fog will be quite dense and may take some time to clear during the cold start to Thursday morning, but will lift by late morning.
However, some coastal areas could see the misty conditions remaining.
The warning valid from 2am until 10am on Thursday means the public should be aware of the potential for some difficult driving conditions and disruption to travel, particularly during the morning rush hour.
A chief forecaster for the Exeter-based office said: “Light winds and clear skies overnight and during Thursday morning will allow fog to form in places. Not everywhere in the yellow area will see fog, but where it forms it is likely to be dense at times, especially in low-lying areas. The fog will then slowly clear through the middle of the morning.”
The rest of the day is going to be bright and clear with temperatures of 14c.