With Met Office forecasts of strong winds and heavy rain and the warning that wintry showers may bring snow and ice, Cornwall Council is warning residents to be prepared and take precautions where necessary.
Drivers are asked to take care if icy roads cause difficult conditions. The road network will be salted this evening, but not every road will be treated.
People are also being warned that high winds could cause damage to trees and disrupt power supplies, and create dangerous conditions around the coast.
The council has also issues warnings against the possibility of flooding.
Anyone whose property is prone to flooding should ensure they have a supply of sandbags ready to protect their home or business, and to clear their drains of leaves and blockages. Local communities have also been encouraged to check with vulnerable neighbours in case they need help.