A weather alert for Helensburgh and Lomond has been issued for ice and snow over the next 24 hours.
The Met Office yellow warning runs from 5pm on Friday night until 11am on Saturday morning.
Showers are expected to move inland overnight leading to a risk of icy patches and also some snow over higher ground.
Roads and railways are likely to be affected, with icy patches on untreated roads, pavements and cycle paths.
The Met Office said: "Showers are expected to move inland overnight with a mixture of rain, sleet and snow falling onto sub-zero surfaces leading to a risk of icy patches.
"Snow is most likely over hills, especially across the south of Dumfries and Galloway and parts of Cumbria and may lead to small accumulations of around 1-3 cm above 200 metres.
"Snowy, wintry weather can cause delays and make driving conditions dangerous. Keep yourself and others safe by planning your route, giving yourself extra time for your journey. Not needing to rush, reduces your risk of accidents, slips, and falls.
"Check for road closures or delays to public transport and amend plans if necessary. If you need to make a journey on foot or by bike, try to use pavements along main roads which are likely to be less slippery."
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