Is it to cold to apply stucco?
It is always recommended not to stucco when temperatures are continuously below freezing at night. If the work must be completed than a frost barrier covering the stucco should be installed. This will help to keep escaping heat. There are antifreeze agents that can be mixed in with the mortar to prevent freezing. I believe these products do work to prevent freezing issues in mortar but we found that our mortar color has a tendency to change when we added agents… Color changes in masonry restoration is not good!