Warm
You can say that it is balmy or mild. Depending on how you use it, hot could even be a synonym. If someone says "it is getting warm in here," you could substitute hot. If you are referring to an in-between temperature, as with water, you could use tepid. If you are trying to replace it in the sentence "He received a warm reception," you could replace it with enthusiastic.
An antonym for timid is bold, brave, composed, confident, cool,courageous, fearless, heroic, intrepid, unafraid,undaunted, valiant.
The word shawl refers to an object - a piece of cloth that is wrapped around the body to keep warm. It does not have an antonym. Unless a noun can be used descriptively, it cannot have an opposite.
An object that is not hot or warm, but not cold either.
Warm
Heat travels from warm to cool.
warm
It is cooler because warm and cool makes cool
It is cooler because warm and cool makes cool
It is cooler because warm and cool makes cool
it is warm but cool sometimes it is warm but cool sometimes
It has to warm and then cool.
cool
cool, formal, unfriendly.
Fun, Cool, Exciting, etc...
You can say that it is balmy or mild. Depending on how you use it, hot could even be a synonym. If someone says "it is getting warm in here," you could substitute hot. If you are referring to an in-between temperature, as with water, you could use tepid. If you are trying to replace it in the sentence "He received a warm reception," you could replace it with enthusiastic.